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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 33. Отображено 33.
12-05-2023 дата публикации

Mobile energy storage remote operation and maintenance management and control system and method based on VPDN private network

Номер: CN116112520A
Автор: SUN BO, TAO YIBIN, WU FUBAO, YANG BO, SANG BINGYU, LI GUANJUN, ZHU SHAOJIE, LI KECHENG, JI LIANTAO, LI HAOYUAN
Принадлежит:

The invention provides a mobile energy storage remote operation and maintenance management and control system and method based on a VPDN private network. The method comprises the following steps: collecting equipment data through a sensing layer; transmitting the equipment data to a data layer through a network layer; receiving data transmitted by the network layer through a data layer, and performing data acquisition, data processing and data storage; and receiving the processed data through an application layer, analyzing a mobile energy storage index based on the processed data, and remotely controlling the mobile energy storage system based on an analysis result. According to the method for remote operation and maintenance of the mobile energy storage system based on the VPDN private network, the problem that centralized monitoring, remote operation and maintenance and safety management and control of existing mobile energy storage are difficult is solved, wide access and wireless transmission ...

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Номер записи: 1
17-12-2014 дата публикации

Novel busbar-free four-port bipolar DC-DC (direct current to direct current) converter

Номер: CN104218796A
Автор: YAO LIANGZHONG, XU XIAOHUI, LI YAN, YANG BO, CAO YUANZHI, LU JUNFENG, CAI XU, ZHU MIAO, ZHANG JIANWEN, MA JIANJUN, DING JIE, TAO YIBIN, LI GUANJUN, CUI HONGFEN, WANG DESHUN, ZHOU CHEN, LIU HUAN, YAN SHENGCHI, WANG ZHIBING, SUN WEI, HU JINHANG, FENG XINZHEN, WU JING, ZHU HONGBAO, LI YUELONG
Принадлежит:

The invention provides a novel busbar-free four-port bipolar DC-DC (direct current to direct current) converter which comprises an annular architecture. The annular architecture is formed by four converter unit groups in sequential connection; each converter unit group comprises two converter units in connection; each of two power electronic device branches of each converter unit comprises two power electronic devices in same-direction connection; junction points of the power electronic devices are connected through electric reactors. Compared with the prior art, the novel busbar-free four-port bipolar DC-DC converter has a power bidirectional flow capability and is applicable to different operating conditions of a direct-current system, power conversion coefficient is decreased, and power conversion efficiency of the converter is improved.

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Номер записи: 2
16-09-2015 дата публикации

Insulation protection device of photovoltaic low voltage ride through movement detection system

Номер: CN0204649774U
Автор: WANG DESHUN, CHEN MEI, DING JIE, YANG BO, HUA GUANGHUI, YU BIN, JI LIANTAO, KONG AILIANG, ZHAO SHANGLIN, LIU HUAN, SANG BINGYU, TAO YIBIN, LI GUANJUN
Принадлежит:

The utility model relates to an insulation protection device of photovoltaic low voltage ride through movement detection system, including voltage detection unit, voltage comparing unit and the protection output unit who connects gradually, voltage detection unit install in on the circuit monitoring point of photovoltaic low voltage ride through movement detection system, the current voltage of voltage detection unit real -time collection, with the signal carry for voltage comparing unit, voltage comparing unit with output the protective action node send for the protection system of high altitude photovoltaic low voltage ride through movement detection system. The utility model discloses effective equipment overvoltage that is directed against is monitored to send the trip protection signal, prevent that insulation of equipment from destroying the production loss, it also can adapt to to the low voltage ride through detecting system under the high altitude environment, can carry out the ...

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Номер записи: 3
24-06-2015 дата публикации

Current control method and device for off-grid energy storage converter

Номер: CN104734121A
Автор: ZONG JIN, BAI KAI, FENG XINZHEN, TAO YIBIN, LI NA, LI ZHI, ZHANG YANGFAN, YANG WEIXIN, HU JINHANG, LI GUANJUN, ZHOU CHEN, LIU HUAN, YU HAOJIE
Принадлежит:

The invention provides a current control method and device for an off-grid energy storage converter and relates to the technical field of power systems. The method includes the steps of obtaining an IGBT side current and a micro-grid side current through current sampling; judging whether the IGBT side current and the micro-grid side current are smaller than a first preset current limit value and a second preset current limit value respectively; determining that an impact load has access to the off-grid energy storage converter and obtaining the time span of impact load access if the IGBT side current is larger than or equal to the first current limit value or the micro-grid side current is larger than or equal to the second current limit value; determining a first protection strategy of the off-grid energy storage converter according to the time span, and operating the off-grid energy storage converter according to the protection strategy to control an impact current of the off-grid energy ...

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Номер записи: 4
29-08-2023 дата публикации

Fault ride-through method and system for voltage source type energy storage converter

Номер: CN116667329A
Автор: LI HAOYUAN, TAO YIBIN, LI GUANJUN, SANG BINGYU, CHEN GUOWEI, ZHU SHAOJIE, LI QIANG
Принадлежит:

The invention relates to the technical field of electrical control, particularly provides a voltage source type energy storage converter fault ride-through method and system, and aims to improve the voltage source type energy storage fault ride-through performance by comprehensively optimizing a power instruction, a voltage instruction and a current vector in consideration of different power grid drop depths and device overload capacities. Furthermore, according to the technical scheme provided by the invention, the converter is fully utilized to simulate the external characteristics of the synchronous machine to suppress transient impact current and steady-state fault current, reactive support is provided for the power grid, switching to a current source type control mode is not needed, and the large-interference stability of the voltage source type energy storage system in a high-proportion new energy access scene is improved.

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Номер записи: 5
27-08-2014 дата публикации

Series type tidal current controller suitable for direct current power transmission

Номер: CN104009463A
Автор: CAO YUANZHI, YAO LIANGZHONG, WU FUBAO, YANG BO, LU JUNFENG, TAO YIBIN, WANG DESHUN, ZHOU CHEN, LIU HUAN, YAN SHENGCHI, WANG ZHIBING, SUN WEI, XU XIAOHUI, HU JINHANG, CUI HONGFEN, FENG XINZHEN, ZHU HONGBAO
Принадлежит:

The invention provides a series type tidal current controller suitable for direct current power transmission. The controller comprises a bi-directional DC/DC converter and an H bridge converter connected with the bi-directional DC/DC converter in series. The bi-directional DC/DC converter is connected into a high-voltage direct current power transmission network through direct current breakers, one output branch circuit of the H bridge converter is sequentially connected into the high-voltage direct current power transmission network through a reactor and a direct current fuse protector, and the other output branch circuit of the H bridge converter is directly connected into the high-voltage direct current power transmission network. Compared with the prior art, the series type tidal current controller suitable for the direct current power transmission can control fixed voltage connected inside a direct current transmission line in series in a linear mode when operating in a voltage mode ...

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Номер записи: 6
15-04-2015 дата публикации

Concurrent control process voltage compensating method of energy storage system at tail end of power distribution network

Номер: CN104518511A
Автор: LI QUN, YUAN XIAODONG, LI QIANG, ZHANG XIANGWEN, LIU DAN, LYU ZHENHUA, WU SHENGJUN, TAO YIBIN, LI GUANJUN, HU JINHANG, ZHOU CHEN, YU HAOJIE, FENG XINZHEN, CAO YUANZHI, LIU HUAN, YANG BO, HE WEIGUO, YAN SHENGCHI
Принадлежит:

The invention discloses a concurrent control process voltage compensating method of an energy storage system at the tail end of the power distribution network. The concurrent control process voltage compensating method includes steps of S01, disconnecting network combination point switches and operating the energy storage system in a V/F voltage source mode in the off-network state; S02, detecting whether terminal voltage of the power distribution network is recovered or not, if yes, acquiring the terminal voltage of the power distribution network, and calculating to obtain three-phase voltage amplitude average Ugrid; S03, acquiring microgrid terminal voltage of the network combination point switches and calculating to obtain three-phase voltage amplitude average value Umicro; acquiring in-place terminal voltage of the energy storage system and calculating to obtain three-phase amplitude average value Uabc; S04, compensating voltage reference to obtain voltage control reference value Uref ...

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Номер записи: 7
02-05-2023 дата публикации

Test platform and method suitable for silicon carbide photovoltaic/energy storage high-frequency control platform

Номер: CN116048033A
Автор: LI GUANJUN, WEI LINGFENG, TAO YIBIN, YU HAOJIE, WANG DESHUN, CHEN ERSONG, HE JIEQIONG, JU RONGRONG
Принадлежит:

The invention provides a test platform and method suitable for a silicon carbide photovoltaic/energy storage high-frequency control platform. The test platform comprises an analog quantity input unit and an upper computer which are respectively connected to the silicon carbide photovoltaic/energy storage high-frequency control platform to be tested; if the analog quantity signal received by the upper computer is not consistent with the analog quantity signal input by the analog quantity input unit, the analog quantity test result of the corresponding line is that a problem exists, otherwise, the analog quantity test result of the corresponding line is that no problem exists; the analog quantity function of the silicon carbide photovoltaic/energy storage high-frequency control platform can be rapidly detected through the analog quantity input unit and the upper computer, the fault generation reason can be analyzed according to the test phenomenon, the position of a fault circuit can be positioned ...

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Номер записи: 8
26-02-2014 дата публикации

Mixed-liquid-flow energy-storage system with reactive compensation function

Номер: CN103606942A
Автор: CAO YUANZHI, ZHOU CHEN, YAN SHENGCHI, TAO YIBIN, LI GUANJUN, LIU HUAN, HU JINHANG, FENG XINZHEN, SU GUANGNING, ZHANG YU
Принадлежит:

The invention provides a mixed-liquid-flow energy-storage system with a reactive compensation function. The system includes a liquid-flow battery energy-storage system and a supercapacitor group, which are connected through a DC circuit breaker group. The supercapacitor group, a bidirectional DC/AC converter, a boosting transformer, an AC circuit breaker and an AC power grid are connected in order. The liquid-flow battery energy-storage system includes an all-vanadium liquid-flow battery, a sodium-sulfur battery and a zinc-bromine battery. The supercapacitor group is formed by serial or parallel connection of single-body supercapacitors. The single-body supercapacitors are double-electric-layer supercapacitors or electrochemical supercapacitors. Compared with the prior art, the mixed-liquid-flow energy-storage system with the reactive compensation function is capable of improving effectively stability and reliability of power supplying a distributed power generation system.

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Номер записи: 9
16-07-2014 дата публикации

System black-start method for light storage combined distributed generator under off-network condition

Номер: CN103928942A
Автор: KE YONG, TAO YIBIN, HUANG JIAYUN, JIANG LING, DENG BIN
Принадлежит:

The invention discloses a system black-start method for a light storage combined distributed generator under an off-network condition. The method includes the steps that firstly, the electric quantity of an energy storage battery is detected, and whether the working state of the energy storage battery is a power-shortage-free state or a power shortage state is judged; secondly, when the energy storage battery is in the power shortage state, fault warning is conducted; when the energy storage battery is in the power-shortage-free state, the energy storage battery supplies power to a light storage current converter; thirdly, when the energy storage battery supplies power to the light storage current converter, direct current voltage received by the light storage current converter is detected, and whether the direct current voltage received by the light storage current converter is within a first threshold range or not is judged; fourthly, when the direct current voltage received by the light ...

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Номер записи: 10
15-04-2015 дата публикации

MMC topological structure based hybrid energy storage system

Номер: CN104518518A
Автор: YUAN XIAODONG, CAO YUANZHI, LI QUN, LI QIANG, LIU DAN, LYU ZHENHUA, TAO YIBIN, LI GUANJUN, HU JINHANG, ZHOU CHEN, YU HAOJIE, FENG XINZHEN, LIU HUAN, YANG BO, HE WEIGUO, YAN SHENGCHI
Принадлежит:

The invention discloses an MMC topological structure based hybrid energy storage system which comprises a plurality of chemical energy storage batteries, a plurality of capacitors and an MMC topological structure based converter. Each chemical energy storage battery and each capacitor are connected with the converter through submodules, and one end of each submodule is connected with the corresponding chemical energy storage battery or the corresponding capacitor while the other end of each submodule is serially connected in the converter. Preferably, each submodule is a half-bridge submodule consisting of two fully-controlled power components and a capacitor, wherein the two fully-controlled power components are connected serially and then parallelly connected with the capacitor. More preferably, each submodule is a full-bridge submodule consisting of four fully-controlled power components and a capacitor, wherein the four fully-controlled power components are connected serially pairwise ...

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Номер записи: 11
28-04-2023 дата публикации

Direct hanging type energy storage slow start control method and system

Номер: CN116032106A
Автор: HU WEIFENG, XU ZHENG, BAI JINGJING, LI GUANJUN, WU FUBAO, LI HAOYUAN, YANG BO, TAO YIBIN, CHEN GUOWEI, WEI LINGFENG
Принадлежит:

The invention discloses a direct hanging type energy storage slow start control method and system. The system comprises an overvoltage judgment module, an overcurrent judgment module, an overvoltage limiting module, an overcurrent limiting module, a voltage control module, a current control module and a PWM (Pulse Width Modulation) module. The method comprises the following steps: acquiring a voltage signal Vabc of a grid-connected point, and calculating the amplitude Vp of the Vabc; collecting a line current signal Iabc, and calculating the amplitude Ip of the Iabc; setting a virtual impedance value coefficient according to the magnitude of the voltage amplitude; setting a current given slope coefficient according to the magnitude of the current amplitude; and the voltage control module performs closed-loop control on the voltage of the grid-connected point, generates a current given instruction to the current control module, obtains a voltage modulation signal to the PWM modulation module ...

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Номер записи: 12
24-09-2014 дата публикации

Micro grid rapid grid connection method based on three-phase independent regulation

Номер: CN104065104A
Автор: TAO YIBIN, DING JIE, WU FUBAO, YANG BO, CHEN BIN, LI GUANJUN, ZHENG GAO, SANG BINGYU, WANG DESHUN, HE WEIGUO, HU JINHANG, FENG XINZHEN, LIU HUAN, YU BIN, YAN SHENGCHI, CAO YUANZHI, ZHOU CHEN, YU HAOJIE
Принадлежит:

The invention provides a micro grid rapid grid connection method based on three-phase independent regulation. The method comprises the following steps: (1) a grid connection protection controller of a micro grid and a distribution network sends the collected three-phase voltage value of a distribution network side and the state signal of a grid connection circuit breaker to a master power supply controller of a micro grid side, (2) the master power supply controller uses a PI control algorithm to respectively adjust the active power, reactive power and phase parameter of each phase of the micro grid side, (3) the master power supply controller carries out real-time comparison of the voltage parameters of the distribution network side and the micro grid side, and if the comparison result satisfies the synchronous closing judgment condition of a power grid, a closing command is sent to the grid connection circuit breaker. Compared with the prior art, according to the micro grid rapid grid ...

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Номер записи: 13
06-08-2014 дата публикации

Method for controlling high-dynamic properties of high-power bidirectional DC/DC converters

Номер: CN103973105A
Автор: LI GUANJUN, TAO YIBIN, ZHOU CHEN, HU JINHANG, YANG BO, CAO YUANZHI, FENG XINZHEN, YU HAOJIE, WANG DESHUN, YU BIN, SANG BINGYU, YAN SHENGCHI, ZHU HONGBAO, LI YUELONG, YAO MENGYANG, WU TAO
Принадлежит:

The invention provides a method for controlling high-dynamic properties of high-power bidirectional DC/DC converters. The method includes steps of enabling a controller to receive constant-voltage control instructions and constant-voltage control instruction values and acquiring AD (analog-digital) sampled voltage feedback values; changing PI (proportion and integration) control parameters of outer voltage loops when low fluctuating power is outputted by a DC/DC converter and determining current instructions outputted by closed voltage loops under PI control; changing PI parameters of the outer voltage loops according to voltage difference values when the DC/DC converter is subjected to high-power charge and discharge conversion, and outputting the current instructions; changing integration items of inner current loops according to state switching directions when working modes of the DC/DC converter are switched over; transmitting PWM (pulse width modulation) driving signals according to ...

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Номер записи: 14
02-06-2010 дата публикации

Method for detecting initial position of rotor of static frequency-conversion starting motor of pumped storage power station

Номер: CN0101719753A
Автор: JIA CHAI, WEI FENG, GUANJUN LI, HUADONG LIU, HONGSHUI LU, BINGYU SANG, YIBIN TAO, DESHUN WANG, XIAONAN XU, BO YANG, BIN YU, CHAI JIA, FENG WEI, LI GUANJUN, LIU HUADONG, LU HONGSHUI, SANG BINGYU, TAO YIBIN, WANG DESHUN, XU XIAONAN, YANG BO, YU BIN
Принадлежит:

The invention relates to a method for detecting the initial position of a rotor of a static frequency-conversion starting motor of a pumped storage power station, comprising the following steps of: judging primary excitation time of the rotor through the AD sampling of the voltage of a machine end line; calculating three-phase voltage in a static coordinate after the primary excitation time of the rotor is discovered; calculating the magnetic flow of the rotor in the static coordinate through a self-adaption magnetic flow regulating algorithm; and solving a position angle of the rotor through arc tangent, wherein the position angle of the rotor is an initial position angle of the rotor when the position of the rotor is stable. The invention judges the primary excitation time of the rotor through reasonable arrangement and provides the endurance for accurately starting integral operation; a self-adaption magnetic flow regulator can fast and accurately calculate the position of the rotor, ...

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Номер записи: 15
25-04-2023 дата публикации

Battery monitoring operation and maintenance method, system and equipment of mobile energy storage system and medium

Номер: CN116008834A
Автор: ZHOU CHEN, FENG XINZHEN, TAO YIBIN, WANG DESHUN, SANG BINGYU, LI GUANJUN, XUE JINHUA, YU HAOJIE, ZHUANG JUN, LIU HUAN, LI YUELONG
Принадлежит:

The invention provides a battery monitoring operation and maintenance method, system and device for a mobile energy storage system, and a medium. The method comprises the following steps: acquiring battery operation data of the mobile energy storage system; monitoring and analyzing according to the battery operation data to obtain an alarm work order; sending the alarm work order to operation and maintenance personnel; the monitoring analysis comprises unbalance analysis, short plate positioning and early warning. Unbalance analysis, short plate positioning and early warning are carried out on the battery, remote operation and maintenance of the mobile energy storage system can be achieved, early warning of system battery faults is achieved, the operation and maintenance efficiency of the mobile energy storage system is improved, and the operation and maintenance time is shortened.

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Номер записи: 16
06-06-2023 дата публикации

Man-machine monitoring system and method of static frequency converter

Номер: CN116231839A
Автор: LI HAOYUAN, WEI LINGFENG, LI GUANJUN, YANG BO, TAO YIBIN, WANG DESHUN, JI LIANTAO, GU HAOWEI
Принадлежит:

The invention relates to the technical field of static frequency converters, and particularly provides a man-machine monitoring system and method for a static frequency converter, and the system comprises a display module, a parameter collection module, a system topology module, and a function module. The parameter acquisition module is used for acquiring basic parameter information of the static frequency converter; the system topology module is used for constructing a system topology structure of the static frequency converter; the function module is used for displaying and adjusting the running state of the static frequency converter; and the display module is used for displaying the basic parameter information, the system topology structure and the operation state of the static frequency converter. The technical scheme provided by the invention can solve the measurement and control protection problem of the power electronic device, and can be widely applied to the soft start occasion ...

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Номер записи: 17
07-04-2023 дата публикации

Optimal rotating speed control method and system for pumped storage static frequency converter

Номер: CN115940703A
Автор: LI HAOYUAN, WU FUBAO, LI GUANJUN, YANG BO, TAO YIBIN, CHEN GUOWEI, JI LIANTAO, YU HAOJIE, YIN SHI, SANG BINGYU
Принадлежит:

The invention discloses an optimal rotating speed control method and system for a pumped storage static frequency converter. The method comprises the steps of obtaining target frequency, network bridge current, network bridge voltage and machine bridge voltage; inputting the target frequency, the network bridge current, the network bridge voltage and the machine bridge voltage into a pre-constructed optimal rotating speed control model, and outputting a network bridge thyristor trigger pulse and a machine bridge thyristor trigger pulse; the network bridge thyristor trigger pulse and the machine bridge thyristor trigger pulse act on a network bridge converter and a machine bridge converter respectively to obtain frequency and voltage corresponding to the rotating speed of the motor; wherein the optimal rotating speed control model is constructed by a pulse generation channel constructed by a plurality of modules determined by a network bridge thyristor trigger pulse and a machine bridge ...

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Номер записи: 18
27-08-2014 дата публикации

Mobile energy storage system for dual power supply

Номер: CN104009490A
Автор: YAN SHENGCHI, ZHANG YU, SU GUANGNING, LIU SHU, YANG BO, TAO YIBIN, LI GUANJUN, YU BIN, SANG BINGYU, LIU HUAN, ZHOU CHEN, HU JINHANG, FENG XINZHEN, YU HAOJIE
Принадлежит:

The invention relates to a mobile energy storage system for dual power supply. The mobile energy storage system comprises an energy storage battery, an energy storage current converter cabinet, a direct current converter cabinet, a UPS, a first AC/DC switching power source, a first DC/DC switching power source, a second AC/DC switching power source and a second DC/DC switching power source. The output end of the energy storage battery is respectively connected to the input end of the first DC/DC switching power source and the input end of the second DC/DC switching power source. The output end of the first AC/DC switching power source and the output end of the first DC/DC switching power source are respectively connected with the input end of the energy storage current converter cabinet. The output end of the energy storage current converter cabinet is connected with the input end of the UPS, and the output end of the UPS is respectively connected with the input end of the first AC/DC switching ...

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Номер записи: 19
17-12-2014 дата публикации

Unipolar-bipolar convertible direct-current converter

Номер: CN104218805A
Автор: YAO LIANGZHONG, YANG BO, XU XIAOHUI, TAO YIBIN, CAO YUANZHI, LI GUANJUN, CAI XU, ZHU MIAO, ZHANG JIANWEN, MA JIANJUN, DING JIE, LU JUNFENG, LI YAN, CUI HONGFEN, WANG DESHUN, ZHOU CHEN, LIU HUAN, YAN SHENGCHI, WANG ZHIBING, SUN WEI, HU JINHANG, FENG XINZHEN, WU JING, ZHU HONGBAO, LI YUELONG
Принадлежит:

The invention provides a unipolar-bipolar convertible direct-current converter comprising a unipolar side power module and a bipolar side power module connected to two sides of a medium-frequency transformer. The unipolar side power module comprises a first power electronic device full-bridge circuit, a voltage stabilizing capacitor and a direct-current breaker; two ends of the power electronic device full-bridge circuit are connected with the medium-frequency transformer; other two ends of the power electronic device full-bridge circuit are connected with a unipolar direct-current system; the bipolar side power module comprises a second power electronic device full-bridge circuit, a capacitor, a voltage stabilizing capacitor, a reactor and a direct-current breaker; two ends of the second power electronic device full-bridge circuit are connected with the medium-frequency transformer, and other two ends of the second power electronic device full-bridge circuit are connected with a bipolar ...

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Номер записи: 20
23-05-2012 дата публикации

Method for detecting initial position of rotor of static frequency-conversion starting motor of pumped storage power station

Номер: CN0101719753B
Автор: JIA CHAI, WEI FENG, GUANJUN LI, HUADONG LIU, HONGSHUI LU, BINGYU SANG, YIBIN TAO, DESHUN WANG, XIAONAN XU, BO YANG, BIN YU, CHAI JIA, FENG WEI, LI GUANJUN, LIU HUADONG, LU HONGSHUI, SANG BINGYU, TAO YIBIN, WANG DESHUN, XU XIAONAN, YANG BO, YU BIN
Принадлежит:

The invention relates to a method for detecting the initial position of a rotor of a static frequency-conversion starting motor of a pumped storage power station, comprising the following steps of: judging primary excitation time of the rotor through the AD sampling of the voltage of a machine end line; calculating three-phase voltage in a static coordinate after the primary excitation time of the rotor is discovered; calculating the magnetic flow of the rotor in the static coordinate through a self-adaption magnetic flow regulating algorithm; and solving a position angle of the rotor througharc tangent, wherein the position angle of the rotor is an initial position angle of the rotor when the position of the rotor is stable. The invention judges the primary excitation time of the rotor through reasonable arrangement and provides the endurance for accurately starting integral operation; a self-adaption magnetic flow regulator can fast and accurately calculate the position of the rotor, ...

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Номер записи: 21
17-12-2014 дата публикации

Output voltage positive and negative polarity inversion method based on modular multilevel converter

Номер: CN104218808A
Автор: YAO LIANGZHONG, CAI XU, ZHU MIAO, ZHANG JIANWEN, SUN CHANGJIANG, DING JIE, YANG BO, XU XIAOHUI, CAO YUANZHI, LU JUNFENG, LI YAN, TAO YIBIN, LI GUANJUN, CUI HONGFEN, WANG DESHUN, ZHOU CHEN, LIU HUAN, YAN SHENGCHI, WANG ZHIBING, SUN WEI, HU JINHANG, FENG XINZHEN, WU JING, ZHU HONGBAO, LI YUELONG
Принадлежит:

The invention provides an output voltage positive and negative polarity inversion method based on a modular multilevel converter. The method includes 1, constructing a modular multilevel converter module; 2, inverting the output voltage positive and negative polarities by adjusting the bridge voltage of the modular multilevel converter module; modulating the upper bridge voltage uu and lower bridge voltage ul of each phase, according to a bridge voltage wave image, into sine wave voltage symmetrical about a horizontal line U = UN/2 vertically, and allowing that the LCC terminal output voltage ULCC = UN; modulating the upper bridge voltage uiu and lower bridge voltage uil of each phase into sine wave voltage symmetrical about a horizontal line U = -UN/2 vertically, and allowing that the LCC terminal output voltage ULCC = -UN. Compared with the prior art, the method has the advantages that the operation requirements of LCC-HVDC and VSC-HVDC interface converters are met, and LCC-HVDC and VSC-HVDC ...

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Номер записи: 22
20-07-2011 дата публикации

Method for detecting frequency at static variable-frequency starter end of pumped storage power station

Номер: CN0102128980A
Автор: MEI CHEN, FUBAO WU, HONGSHUI LV, WEI FENG, XIAONAN XU, JIANZHONG FU, JIANFENG LI, BO YANG, YIBIN TAO, GUANJUN LI, DESHUN WANG, BIN YU, BINGYU SANG, JIANYONG JU, CHEN MEI, WU FUBAO, LV HONGSHUI, FENG WEI, XU XIAONAN, FU JIANZHONG, LI JIANFENG, YANG BO, TAO YIBIN, LI GUANJUN, WANG DESHUN, YU BIN, SANG BINGYU, JU JIANYONG
Принадлежит:

The invention discloses a method for detecting a frequency at a static variable-frequency starter end of a pumped storage power station. The method adopts a three-section frequency measurement method. Frequency sections are respectively: 0.5 to 15 Hz, 15 to 30 Hz and 30 to 50 Hz. The method has the advantage that more accurate measurement of the frequency at the static variable-frequency starter end of the pumped storage power station can be realized.

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Номер записи: 23
13-08-2014 дата публикации

Energy storage converter parallel operation optimizing control method in three-phase imbalance system

Номер: CN103986174A
Автор: HU JINHANG, DING JIE, WU FUBAO, LI GUANJUN, TAO YIBIN, YANG BO, HE WEIGUO, SANG BINGYU, FENG XINZHEN, YU HAOJIE, LIU HUAN, YAN SHENGCHI, YU BIN, CAO YUANZHI, ZHOU CHEN, ZHU HONGBAO, LI YUELONG, LU JUNFENG, WU TAO, LI HAIFENG, LUO JIANYU
Принадлежит:

The invention provides an energy storage converter parallel operation optimizing control method in a three-phase imbalance system. The method includes the following steps that a three-phase voltage actual measurement effective value, a three-phase active power value and a three-phase reactive power value of an energy storage converter in parallel operation are calculated; a three-phase frequency set value and a three-phase voltage effective set value of the energy storage converter in parallel operation are calculated; active power and reactive power of all phases of the energy storage converter in parallel operation are balanced by adjusting the output frequency and voltage of each phase. The energy storage converter parallel operation optimizing control method in the three-phase imbalance system solves the problems that the voltage and frequency of the energy storage converter are not balanced and currents of the energy storage converter are not distributed evenly in multi-machine parallel ...

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Номер записи: 24
05-11-2014 дата публикации

Voltage optimization control method of off-grid energy storage converter based on compound control

Номер: CN104135021A
Автор: FENG XINZHEN, TAO YIBIN, LI GUANJUN, DING JIE, WU FUBAO, LI QIANG, YANG BO, HE WEIGUO, YUAN XIAODONG, HU JINHANG, ZHANG XIAOLIN, SANG BINGYU, ZHOU CHEN, CAO YUANZHI, LIU HUAN, YAN SHENGCHI, YU HAOJIE
Принадлежит:

The invention provides a voltage optimization control method of an off-grid energy storage converter based on compound control. The optimization control method comprises the steps of summing outputs of repetitive control and PID (Proportion Integration Differentiation) control as a control signal of the energy storage converter, allowing the PID control to adjust a deviation of an effective value of voltage, obtaining PID control quantity, allowing the repetitive control to adjust a deviation of actual output voltage and analog sinusoidal voltage of the energy storage converter, and obtaining repetitive control quantity. The method solves the problem of poor power quality of a power supply system caused by non-linear load connection, and improves the power quality of the power supply system during off-grid operation of the energy storage converter.

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Номер записи: 25
15-04-2015 дата публикации

Direct current source coordination controller and direct current converter parallel connection control method thereof

Номер: CN104518509A
Автор: LI QIANG, YUAN XIAODONG, LI GUANJUN, LYU ZHENHUA, LIU DAN, CAI DONGYANG, TAO YIBIN, HU JINHANG, ZHOU CHEN, YU HAOJIE, FENG XINZHEN, CAO YUANZHI, LIU HUAN, YANG BO, HE WEIGUO, YAN SHENGCHI
Принадлежит:

The invention discloses a direct current source coordination controller which comprises an information collecting module, a power calculating module, a control parameter setting module and a coordination control module. The information collecting module is respectively in communication connection with the power calculation module and the control parameter setting module. The power calculation module and the control parameter setting module are both in communication connection with the coordination control module. The information collecting module and the coordination control module are both externally connected with direct current sources. The invention further discloses a method for using the direct current source coordination controller to control direct current converter parallel connection. The direct current source coordination controller has the advantages that the controller acquires real-time power and sets a boundary value by collecting the capacities, protecting parameters, limit ...

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Номер записи: 26
30-05-2023 дата публикации

Direct-hanging type energy storage system grid-connection and grid-disconnection fast and smooth switching method

Номер: CN116191553A
Автор: HU WEIFENG, XU ZHENG, BAI JINGJING, LI GUANJUN, LI HAOYUAN, WEI LINGFENG, TAO YIBIN, CHEN GUOWEI
Принадлежит:

The invention discloses a direct hanging type energy storage system grid-connected and off-grid rapid smooth switching method, which comprises the following steps: when an off-grid operation mode needs to be switched to a grid-connected operation mode, closing a pre-synchronization switch Ssyn, and inputting a pre-synchronization unit; the pre-synchronization unit can generate an angular velocity deviation feedback omega syn, and the angular velocity deviation feedback omega syn and the angular velocity obtained according to a rotor motion equation are added to serve as the angular velocity for control; when the virtual power Psyn is detected to be equal to 0, switching on and grid connection are carried out, meanwhile, the pre-synchronization switch Ssyn is switched off, and the pre-synchronization unit is cut off; a small inertia link is added behind the PI regulator and is used for smoothing impact generated by the regulating variable at the closing moment of the pre-synchronization ...

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Номер записи: 27
11-08-2023 дата публикации

Static frequency converter dual-mode torque control method and system

Номер: CN116582042A
Автор: LI HAOYUAN, WU FUBAO, YANG BO, LI GUANJUN, TAO YIBIN, QIN HAO, SONG ZILAN
Принадлежит:

The invention relates to the technical field of power electronics and power systems, and particularly provides a dual-mode torque control method and system for a static frequency converter, and the method comprises the steps: determining an initial current given signal based on an error signal between a motor operation rotating speed and a rotating speed given signal; obtaining a first current given signal; comparing the initial current given signal with the first current given signal, and determining a rectification trigger angle signal and an inverse transformation phase lead angle signal based on a comparison result; and inputting the rectification trigger angle signal and the network bridge voltage into a pulse generation module to obtain a trigger pulse for controlling a network bridge thyristor, and inputting the inverse transformation phase lead angle signal and the machine bridge voltage into a machine bridge pulse generation module to obtain a trigger pulse for controlling a machine ...

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Номер записи: 28
27-06-2023 дата публикации

Lithium battery equalization control method and system based on self-learning fuzzy logic control

Номер: CN116345625A
Автор: WANG DESHUN, XUE JINHUA, TAO YIBIN, YANG BO, WU FUBAO, ZHUANG JUN, YU HAOJIE, YIN SHI, LI GUANJUN, SANG BINGYU, CAO YUANZHI, WANG KAIYI
Принадлежит:

The invention provides a lithium battery equalization control method and system based on self-learning fuzzy logic control, and the method comprises the steps: obtaining parameters of a single battery in a lithium battery pack and an equalization current value of an equalization circuit at a previous moment, and taking the equalization current value at the previous moment as a first equalization current value; based on parameters of single batteries in the lithium battery pack and the first equalization current value, a driving signal is obtained by combining a self-learning fuzzy control algorithm; controlling SOC equalization of the lithium battery based on the driving signal; wherein the lithium battery pack at least comprises two single batteries. According to the invention, an active equalization mode based on a self-learning fuzzy control algorithm and taking the battery SOC as an equalization variable is adopted, so that the problems that an existing battery equalization method is ...

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Номер записи: 29
04-04-2023 дата публикации

Function multiplexing type energy storage converter off-grid control system and method

Номер: CN115912361A
Автор: LI GUANJUN, WANG XIANGYU, LI HAOYUAN, YANG BO, YU HAOJIE, TAO YIBIN, SANG BINGYU
Принадлежит:

The invention provides an off-grid control system and method for a function multiplexing type energy storage converter. The off-grid control system comprises a voltage acquisition module, a current acquisition module, a double-loop control module, a positive and negative sequence separation module, an unbalance compensation calculation module, a harmonic compensation calculation module and a switching pulse generation module. According to the control system and method provided by the invention, multi-objective optimization of the output voltage of the function multiplexing type energy storage converter can be realized; a negative sequence voltage modulation signal is obtained based on the unbalanced component of the voltage introduced by the unbalanced compensation calculation module, so that the energy storage converter has the capacity of negative sequence compensation, and the unbalance degree of the output voltage is reduced; the harmonic voltage modulation signal obtained by introducing ...

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Номер записи: 30
11-07-2023 дата публикации

Configuration method and system for optimized operation of multi-mobile energy storage flexible support regional power grid

Номер: CN116415419A
Автор: FENG XINZHEN, TAO YIBIN, WANG DESHUN, ZHOU CHEN, HU ANPING, LEI JIE, YU HAOJIE, YAN SHENGCHI
Принадлежит:

The invention provides a configuration method and system for optimized operation of a multi-mobile energy storage flexible support regional power grid. The configuration method comprises the following steps: acquiring operation configuration information of a regional power distribution network and multi-mobile energy storage; inputting the regional power distribution network and the multi-mobile energy storage operation configuration information into a pre-constructed mobile energy storage multi-target optimization model to obtain a multi-mobile energy storage optimization configuration scheme; wherein the mobile energy storage multi-objective optimization model is constructed by taking minimization of power distribution network loss, wind curtailment and light curtailment quantity and operation cost of the power distribution network as objectives; the multi-mobile energy storage optimal configuration scheme comprises the positions, the energy storage charging and discharging states and ...

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Номер записи: 31
26-08-2015 дата публикации

Insulation safety assessment method and system of photovoltaic low-voltage crossing mobile detection apparatus

Номер: CN104865463A
Автор: WANG DESHUN, CHEN MEI, DING JIE, YANG BO, HUA GUANGHUI, YU BIN, JI LIANTAO, KONG AILIANG, ZHAO SHANGLIN, LIU HUAN, SANG BINGYU, TAO YIBIN, LI GUANJUN
Принадлежит:

The invention relates to an insulation safety assessment method and system of a photovoltaic low-voltage crossing mobile detection apparatus. The method comprises determining the amplitude of switch overvoltage in the low-voltage crossing detection apparatus; determining the electric field intensity of the maximum overvoltage in an overvoltage crossing detection apparatus; and according to the amplitude of the switch overvoltage and the electric field intensity, determining the insulation safety coefficient of the low-voltage crossing detection apparatus. The technical scheme provided by the invention guarantees safe and reliable insulation of the low-voltage crossing detection apparatus.

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Номер записи: 32
04-08-2023 дата публикации

Model prediction control method and system for fixed switching frequency of energy storage converter

Номер: CN116545286A
Автор: LI GUANJUN, WANG XIANGYU, LI HAOYUAN, YANG BO, WU FUBAO, TAO YIBIN, SANG BINGYU, CHEN GUOWEI
Принадлежит:

The model prediction control method for the fixed switching frequency of the energy storage converter comprises the following steps: based on output current values corresponding to each switching sequence of the energy storage converter at the current moment, performing prediction by using a pre-constructed current prediction model to obtain output current values corresponding to each switching sequence at the next moment; based on the output current value corresponding to each switching sequence at the next moment, calculating by using a pre-constructed first value function to obtain a value function value of each switching sequence at the next moment; on the basis of the value function value of each switching sequence at the next moment, a pre-constructed composite value function is used for calculation, and an optimal switching sequence set is determined; selecting a switching sequence from the optimal switching sequence set as a control variable of the energy storage converter at the ...

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Номер записи: 33