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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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Применить Всего найдено 11. Отображено 11.
25-03-2015 дата публикации

Current sharing method of voltage sources and power system

Номер: CN104467368A
Автор: YIN SHAOWEN, SUN JIAPIN, YANG RONGCHUN, ZHANG YA
Принадлежит:

The invention provides a current sharing method of voltage sources and a power system. The current sharing method mainly comprises the following steps that each voltage source receives a broadcast message of a communication bus, and the total number NUM of the voltage sources which are in work is counted according to the number and the working state of each voltage source; each voltage source obtains the current In of a branch circuit where each power source in operating is located according to the broadcasting message on the communication bus and obtains the average current Iavg of the N branch circuits according to the total number NUM of all the voltage sources; each voltage source obtains the voltage difference value delta Un, needing to be adjusted, of the branch circuit where the voltage source is located according to the current In of the branch circuit where the voltage source is located and the current Iavg; a voltage adjusting control module of each voltage source enables the ...

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Номер записи: 1
30-09-2015 дата публикации

Fault detection method and fault detection device for current converter and IGBT drive circuit thereof

Номер: CN104950238A
Автор: SUN JIAPIN, ZHANG YA
Принадлежит:

The invention discloses a fault detection method and a fault detection device for a current converter and an IGBT drive circuit used for the current converter. The fault detection method comprises the following steps: controlling to connect a direct-current voltage to an IGBT power output module, and controlling the on-off of the IGBT to enable the IGBT power output module to invert by a preset IGBT detection inversion voltage target value; before the attraction of an alternating-current contactor, detecting the front-end alternating-current voltage thereof to obtain a first detection voltage value; after the attraction of the alternating-current contactor, detecting the rear-end alternating-current voltage thereof to obtain a second detection voltage value; judging whether the IGBT drive circuit is in a fault state or not according to the preset IGBT detection inversion voltage target value, the first detection voltage value and the second detection voltage value. According to the fault ...

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Номер записи: 2
21-04-2023 дата публикации

Offshore wind power transmission adjustment method and device and electronic equipment

Номер: CN115995812A
Автор: LI CHUNHUA, CHEN YIJING, FU WANG'AN, GUO XIAOJIANG, PENG CHENG, SUN XU, FANG KUO, SHEN XUHUI, XUE WENCHAO, XI JIAWEN, ZHANG JUNYANG, SUN JIAPIN
Принадлежит:

The invention provides an offshore wind power transmission adjustment method and device and electronic equipment, and relates to the technical field of offshore wind power generation, and the method comprises the steps: monitoring first operation data of an offshore converter station of a flexible DC power transmission system; based on the first operation data, determining whether the flexible DC power transmission system reaches a fault condition; and in response to the fact that the flexible direct-current power transmission system reaches the fault condition, the energy consumption device is started, and the pitch angle is adjusted. By monitoring the first operation data of the offshore converter station, the current operation state of the flexible direct current power transmission system is judged, the timeliness of starting the energy consumption device can be improved, and loss caused by abnormal work of the flexible direct current power transmission system is avoided.

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Номер записи: 3
12-02-2014 дата публикации

Power grid compensating system and control method thereof

Номер: CN103580032A
Автор: JING JIANFEI, SUN JIAPIN, YIN SHAOWEN
Принадлежит:

The invention provides a power grid compensating system and a control method of the power grid compensating system. Not only can precise full-range reactive harmonic wave compensation be provided for all single phases, but also power grid voltage can be balanced. The power grid compensating system comprises a bi-direction conductivity inverter, a controller, a monitoring module, a battery module and a capacitor. The method includes the following steps that states which a power grid is in is obtained according to the voltage/currents of the output end and the load end of the sampled power grid and the direct current input voltage/currents of the reverse end of the bi-direction conductivity inverter, and a control signal is generated; when the power grid is in the first state, the bi-direction conductivity inverter is controlled to conduct reversely, so that the battery module absorbs active power from the power grid and stores the active power; when the power grid is in the second state, ...

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Номер записи: 4
02-07-2014 дата публикации

Multi-machine parallel system based on droop characteristic control, and control method of multi-machine parallel system

Номер: CN103904929A
Автор: JING JIANFEI, SUN JIAPIN, YIN SHAOWEN
Принадлежит:

The invention provides a multi-machine parallel system based on droop characteristic control. The multi-machine parallel system comprises a synchronizing signal generator, multiple inverter modules and a monitoring module, wherein the synchronizing signal generator is used for generating a synchronizing signal, the multiple inverter modules are connected in parallel and connected with the synchronizing signal generator, each inverter module captures the synchronizing signal, converts the synchronizing signal into a voltage phase signal and meanwhile samples the voltage and the current of the inverter module, and then phase coincidence is achieved according to the voltage phase signals. The monitoring module is used for calculating the output power of each inverter module according to the voltage and the current of the inverter module and calculating the average output power of the system, and an inverter controller conducts droop control according to the difference between the output power ...

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Номер записи: 5
03-06-2015 дата публикации

Method for converters to switch from grid-connecting to grid-disconnecting

Номер: CN104682414A
Автор: YIN SHAOWEN, SUN JIAPIN, YANG RONGCHUN, WANG JIANXING
Принадлежит:

The invention provides a method for a pluralit of converters to switch from grid-connecting to grid-disconnecting. The method sequentially and mainly comprises the following steps of S10, detecting and judging whether a power grid loses power or not; when the power grid loses the power, performing the step S20; when the power grid does not lose the power, returning back and the continuing to perform the step S10; S20, enabling a controller to control one converter to switch to the grid-disconnecting mode, namely the controller sends a voltage phase correcting instruction to the corresponding converter within the preset period, and the corresponding converter can synchronize the phase of the output voltage within the preset period and the preset reference phase of the controller according to the voltage phase correcting instruction; S30, enabling the controller to disengage a grid-connecting and grid-disconnecting switch; S40, enabling the controller to control the other converters to sequentially ...

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Номер записи: 6
18-07-2023 дата публикации

Inverter grid connection and pre-synchronization control method, inverter system and photovoltaic power supply system

Номер: CN116454958A
Автор: YIN SHAOWEN, SUN JIAPIN, MO XUJIE, YIN JIBO, JING JIANFEI
Принадлежит:

The invention discloses an inverter grid connection and pre-synchronization control method, an inverter system and a photovoltaic power supply system, and the inverter grid connection control method comprises the steps: obtaining a grid connection pre-synchronization signal, an inverter current and an inverter voltage, determining that a power grid is recovered and the grid connection pre-synchronization signal is obtained according to a power grid voltage and the inverter voltage, or determining that the power grid is not recovered and the inverter voltage is obtained according to the power grid voltage and the inverter voltage; the grid-connected pre-synchronization signal is a preset pre-synchronization signal; obtaining an inverter control signal according to the grid-connected pre-synchronization signal, the inversion current and the inversion voltage; and controlling the inverter according to the inverter control signal. According to the inverter grid-connected control method, control ...

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Номер записи: 7
18-07-2023 дата публикации

Two-phase three-wire system inverter and modulation method thereof

Номер: CN116455253A
Автор: YIN SHAOWEN, SUN JIAPIN, MO XUJIE
Принадлежит:

The invention discloses a two-phase three-wire system inverter and a modulation method thereof, and the two-phase three-wire system inverter comprises a capacitor branch, a first midpoint connection branch, a first half-bridge branch, a first output inductor, a second midpoint connection branch, a second half-bridge branch, a second output inductor, a first phase voltage and a second phase voltage. A non-isolated topology is adopted, that is, a capacitor branch, a first midpoint connection branch, a first half-bridge branch, a first output inductor, a second midpoint connection branch, a second half-bridge branch, a second output inductor, a first phase voltage and a second phase voltage form a two-phase three-wire system inverter, and the two-phase three-wire system inverter does not use a transformer. The inverter is directly connected with a power grid after inversion, system cost can be reduced, the modulation method is simple, and the inverter has the advantages of being convenient ...

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Номер записи: 8
03-06-2015 дата публикации

Method for converters to switch from grid-disconnecting to grid-connecting

Номер: CN104682445A
Автор: YIN SHAOWEN, SUN JIAPIN, YANG RONGCHUN, WANG JIANXING
Принадлежит:

The invention provides a method for converters to switch from grid-disconnecting to grid-connecting. The method sequentially and mainly comprises the following steps of S10, enabling a controller to detect and judge whether a power grid is restored or not; when the power grid is restored, performing the step S20; when the power grid is not restored, returning back and continuing to perform the step S10; S20, enabling the controller to detect the phase of the output voltage of the power grid; S30, enabling the controller to adjust the reference phase to synchronize the adjusted reference phase and the phase of the output voltage of the power grid, enabling the controller to send a voltage phase correcting instruction to all the converters within a first preset period according to the adjusted reference phase, and enabling the converters to adjust the phase of the self output voltage according to the voltage phase correcting instruction, so as to synchronize the phase of the output voltage ...

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Номер записи: 9
31-12-2014 дата публикации

Photovoltaic inverter, control method of photovoltaic inverter and photovoltaic power generation system with photovoltaic inverter

Номер: CN104253530A
Автор: YIN SHAOWEN, SUN JIAPIN, YIN JIBO, YANG RONGCHUN
Принадлежит:

The invention discloses a control method of a photovoltaic inverter. The control method includes the steps of detecting direct-current voltage of direct-current input side of the photovoltaic inverter in real time; detecting alternating-current voltage and alternating current of the alternating-current output side of the photovoltaic inverter; and according to the direct-current voltage, the alternating-current voltage and the alternating current, controlling start and stop of the photovoltaic inverter. According to the control method, start and stop of the photovoltaic inverter can be controlled according to the direct-current voltage, the alternating-current voltage and the alternating current detected in real time, start voltage of the photovoltaic inverter can be adjusted in time in different areas and seasons, electric energy of a solar cell array is converted into alternating current as much as possible, sent to a power grid, utilization efficiency of the electric energy of solar ...

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Номер записи: 10
01-07-2015 дата публикации

Battery energy storage system for peak load shifting and control method thereof

Номер: CN104753076A
Автор: JING JIANFEI, SUN JIAPIN, YIN SHAOWEN
Принадлежит:

The invention provides a battery energy storage system for peak load shifting and a control method thereof. The system comprises M energy storage modules, wherein M energy storage modules are mutually connected in parallel, each energy storage module comprises a battery pack and a bi-directional converter, the direct current end of the bi-directional converter is connected with the battery pack, the alternating current end of the bi-directional converter is connected with a power grid, and M is the integer greater than 1; and a monitoring module, wherein the monitoring module is respectively connected with the battery pack and bi-directional converter in each energy storage module, the monitoring module is used for obtaining the charging and discharging power demand curve and current stress optical coefficients (SOC) of M battery packs, and performing the start and stop control and power distribution to M energy storage modules according to the charging and discharging power demand curve ...

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Номер записи: 11