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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 22. Отображено 22.
23-03-2018 дата публикации

High strength enhancement mode polyformaldehyde combined material flush bonding module immersible pump of modifying

Номер: CN0207131627U
Автор: FU MINGZHI, ZHU HONGBO, YANG LE, LI XINHONG
Принадлежит: JILIN AOJITONG PUMP IND CO LTD, JILIN AOJITONG PUMP INDUSTRY CO., LTD.

The utility model discloses a high strength enhancement mode polyformaldehyde combined material flush bonding module immersible pump of modifying belongs to immersible pump technical field. Impeller of pump top be provided with the pump blower inlet casing, pump blower inlet casing top be provided with pump rotating system, pump rotating system top be provided with pump fixing system, this high strength enhancement mode polyformaldehyde combined material flush bonding module immersible pump of modifying simple structure, and reasonable design, traditional cast iron material has been replaced,the production cost is low, the heat collector is advantaged by light weight, freight transportation commodity circulation expense has been reduced, the pump runner is smooth, and sealing performancegood, make the pump reduce in the disastrous range of operating water conservancy, thereby make the efficiency of pump increased substantially, produce the subversive influence to traditional cast iron production ...

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Номер записи: 1
07-04-2023 дата публикации

Series-series compensation wireless power transmission system and parameter configuration method

Номер: CN115940437A
Автор: BO QIANG, ZHAO RUIBIN, WANG QIJIANG, SHEN XUHUI, FU MINGZHI, ZHANG JUNYANG, QIN MENG, LI ZHENG, TONG QIANG, YAO SHAOFEI, YAN JINTAO, ZHANG HENG, ZHANG PENGYI, BU JIANGFENG, YU JIANCHUAN
Принадлежит:

The invention relates to a series-series compensation wireless power transmission system and a parameter configuration method. According to the specific scheme, the system comprises a plurality of wireless electric energy transmission modules, the wireless electric energy transmission modules are connected in parallel, each wireless electric energy transmission module comprises a high-frequency inverter, a transmitting side compensation module, a receiving side compensation module, a coupling coil and a rectifier, and the input ends of the high-frequency inverters are connected in parallel; the output ends of the plurality of rectifiers are connected in parallel; the output end of the high-frequency inverter is connected with the input end of the coupling coil, and the output end of the coupling coil is connected with the input end of the rectifier; a line between the output end of the high-frequency inverter and the input end of the coupling coil is connected with a compensation module ...

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Номер записи: 2
02-06-2023 дата публикации

Method for improving grid-connected stability of full-power converter wind turbine generator

Номер: CN116207777A
Автор: CHEN YIJING, GUO XIAOJIANG, LI CHUNHUA, LI ZHENG, SHEN XUHUI, HE WEIGUO, SUN XU, ZHANG JUNYANG, XI JIAWEN, ZHANG ZHUOYU, PENG CHENG, FU MINGZHI, NIU CHENHUI, SHAN JUN, TANG CHENG, YAN QIHUI, TANG JIANHUI, CHANG YIFAN, WU SIQI, XIE HONG
Принадлежит:

The invention provides a method for improving grid-connected stability of a full-power converter wind turbine generator, and the method comprises the steps: obtaining a state-space equation of a grid-side converter, and the state-space equation comprises grid-side converter modulation parameters; determining a calculation formula of the modulation parameters of the grid-side converter, wherein the calculation formula of the modulation parameters of the grid-side converter comprises the outlet voltage of the grid-side converter; and adjusting the outlet voltage of the grid-side converter on line so as to improve the grid-connected stability of the wind turbine generator. Through the on-line adjustment method of the control parameters, the grid connection stability of the wind turbine generator is improved, the local stability area of the system can be dynamically adjusted, and the local stability of the system is improved.

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Номер записи: 3
09-05-2023 дата публикации

Photovoltaic grid-connected inverter based on wireless power transmission module and control method thereof

Номер: CN116094031A
Автор: BO QIANG, ZHAO RUIBIN, SHEN XUHUI, FU MINGZHI, ZHANG JUNYANG, QIN MENG, LI ZHENG, YANG SONGSHENG, YAN JINTAO, CHEN WENJI, HE CHANG, HUANG ZHONGKE, LI YONGBIN, ZHOU WENSI
Принадлежит:

The invention provides a photovoltaic grid-connected inverter based on a wireless electric energy transmission module and a control method of the photovoltaic grid-connected inverter. The photovoltaic grid-connected inverter comprises a DC-DC wireless electric energy transmission module and a power frequency grid-connected inverter, the input end and the output end of the DC-DC wireless power transmission module are respectively connected with a photovoltaic array and the power frequency grid-connected inverter; the input end and the output end of the power frequency grid-connected inverter are respectively connected with the DC-DC wireless power transmission module and a power grid; wherein the DC-DC wireless electric energy transmission module is composed of N DC-DC wireless electric energy transmission units. According to the inverter provided by the invention, grid-connected operation of the high-power photovoltaic grid-connected inverter with relatively high requirements on electrical ...

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Номер записи: 4
04-04-2023 дата публикации

Configuration and control method for accessing new energy to plant power system of thermal power plant

Номер: CN115912483A
Автор: FU MINGZHI, SUN CAIXIN, PAN XIAOFENG, QIN MENG, BO QIANG, JIANG XINGGUANG, SHEN XUHUI
Принадлежит:

According to the configuration and control method and device for accessing the new energy to the plant power system of the thermal power plant and the storage medium, the access power of accessing the new energy to the plant power system of the thermal power plant is determined according to the type of the thermal power generating unit, and the configuration energy storage capacity is determined according to the type of the thermal power generating unit, the type of accessing the new energy to the thermal power plant and the access power; and determining an operation control strategy of the new energy and the energy storage according to the power prediction data of the new energy and the configured energy storage capacity, and carrying out active output and reactive voltage regulation control on the thermal power generating unit and the new energy based on the operation control strategy of the new energy and the energy storage, the power prediction data and the thermal power generating ...

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Номер записи: 5
23-05-2023 дата публикации

Frequency control method, device and equipment for full-power converter wind turbine generator

Номер: CN116154857A
Автор: CHEN YIJING, GUO XIAOJIANG, PANG RAN, LI CHUNHUA, HUANG NINGBO, LI ZHENG, SHEN XUHUI, XI JIAWEN, PENG CHENG, SUN XU, HE WEIGUO, LIU LIXUN, LI DONG, ZHANG JUNYANG, FU MINGZHI, SHI JUNJIAO, SU XINMIN, JI XIAO, YANG LEI
Принадлежит:

The invention discloses a frequency control method, device and equipment for a full-power converter wind turbine generator. The method comprises the following steps: acquiring related data of a machine side converter in a wind turbine generator; obtaining related data of the network side converter; obtaining a first modulation reference wave of the machine side converter based on the machine side converter related data; obtaining a second modulation reference wave of the network side converter based on the related data of the network side converter; and performing frequency control on the machine side converter based on the first modulation reference wave, and performing frequency control on the network side converter based on the second modulation reference wave. According to the technical scheme, the local stability area of the wind turbine generator can be dynamically adjusted, the local stability is improved, and therefore the inertial support providing capacity of the wind turbine ...

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Номер записи: 6
06-06-2023 дата публикации

Self-adaptive control method for full-power converter wind turbine generator

Номер: CN116231726A
Автор: BIAN FANG, CHEN YIJING, GUO XIAOJIANG, LI CHUNHUA, LI ZHENG, SHEN XUHUI, SUN XU, XI JIAWEN, ZHANG JUNYANG, ZHANG ZHUOYU, PENG CHENG, FU MINGZHI, NIU CHENHUI, WU KAI, YAN QIHUI, ZHAI YUE, ZHANG ZHONGDING, SHEN FANYI, QU YIFENG
Принадлежит:

The invention provides a full-power converter wind turbine generator self-adaptive control method, which comprises the steps of performing at least one time of iterative update on a value of an equivalent inductance between an alternating current side converter of a grid side converter and a power grid so as to obtain a value of the equivalent inductance after iterative update; wherein the value of the equivalent inductance after iteration updating meets a preset convergence condition; calculating a modulation parameter of the grid-side converter based on the value of the equivalent inductance after iteration updating; and performing adaptive control on the grid-side converter according to the modulation parameters. Through iterative updating of the equivalent inductance between the alternating current side converter of the grid-side converter and the power grid, adaptive adjustment of key parameters in a control algorithm is realized, so that the grid-connected stability of a wind driven ...

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Номер записи: 7
05-05-2023 дата публикации

Flexible grid connection method and device for flexible direct current system of offshore wind plant

Номер: CN116073423A
Автор: CHEN YIJING, GUO XIAOJIANG, WANG HAIMING, SHEN XUHUI, LI CHUNHUA, SUN XU, LI ZHENG, XI JIAWEN, WANG LUZHI, ZHANG JUNYANG, PENG CHENG, ZHANG YI, ZHANG ZHUOYU, QIN MENG, ZHAO RUIBIN, FU MINGZHI, JIANG XINGGUANG, TANG HAORAN
Принадлежит:

The invention provides a flexible grid connection method and device for a flexible direct current system of an offshore wind plant. The method comprises the following steps: acquiring rated frequency and rated voltage of a grid-side grid-connected point, a reactive power measured value and a reactive power reference value of a grid-side converter, a direct-current voltage measured value and a direct-current voltage rated value of a direct-current side of the grid-side converter, and an alternating-current voltage measured value of an alternating-current side of the grid-side converter; calculating to obtain a phase reference value based on the rated frequency, the DC voltage measured value and the DC voltage rated value, and calculating to obtain a voltage reference value based on the rated voltage, the reactive power measured value and the reactive power reference value; and calculating a three-phase voltage reference value based on the AC voltage measurement value, the phase reference ...

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Номер записи: 8
04-04-2023 дата публикации

Bilateral LCC composite compensation-based photovoltaic grid-connected inverter and control method thereof

Номер: CN115912469A
Автор: ZHAO RUIBIN, BO QIANG, SHEN XUHUI, FU MINGZHI, ZHANG JUNYANG, QIN MENG, LI ZHENG, LIU YU, GAO YUE, YAO SHAOFEI, CHEN WENJI, ZHANG HUA, ZHENG QIN, ZHAO HAITAO
Принадлежит:

The invention provides a bilateral LCC composite compensation-based photovoltaic grid-connected inverter and a control method thereof. The photovoltaic grid-connected inverter comprises a high-frequency inverter, a wireless electric energy transmission loose coupling transformer, a high-frequency rectifier, a power frequency grid-connected inverter, a first compensation network and a second compensation network, the first compensation network is connected in series between the high-frequency inverter and the wireless power transmission loose coupling transformer; and the second compensation network is connected in series between the wireless power transmission loose coupling transformer and the high-frequency rectifier. The inverter provided by the invention can reduce the loss of electric energy, improve the transmission efficiency and suppress the fluctuation of voltage in the electric energy transmission process.

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Номер записи: 9
06-06-2023 дата публикации

DC voltage cooperative control method and device for offshore wind power flexible DC system

Номер: CN116231714A
Автор: CHEN YIJING, GUO XIAOJIANG, LIU SHUPENG, LI ZHENG, LI CHUNHUA, SUN XU, XI JIAWEN, HE WEIGUO, ZHANG JUNYANG, SHEN XUHUI, LIU MINGSHUO, ZHANG ZHUOYU, ZHENG YIFENG, PENG CHENG, ZHAO RUIBIN, FU MINGZHI, QIN MENG, JIANG XINGGUANG, GUAN YANFEI
Принадлежит:

The invention provides a DC voltage cooperative control method and device for an offshore wind power flexible DC system. According to the method, rated frequency and rated voltage of a grid-side grid-connected point, a reactive power measured value and a reactive power reference value of a grid-side converter, a DC voltage measured value and a DC voltage rated value of a DC side of the grid-side converter, and an AC voltage measured value of an AC side of the grid-side converter are integrated; the grid-side grid-connected point current and the maximum current obtain a grid-side three-phase voltage reference value so as to control a grid-side converter; a rated frequency and a rated voltage of a machine-side grid-connected point, a reactive power measured value and a reactive power reference value of a machine-side converter, a DC voltage measured value and a DC voltage rated value of a DC side of the machine-side converter, and an AC voltage measured value of an AC side of the machine-side ...

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Номер записи: 10
09-12-2015 дата публикации

Water meter

Номер: CN0204854824U
Автор: FU MINGZHI
Принадлежит:

The utility model discloses a water meter, including the counter, gear box, the impeller, impeller box, the spacer screen, the water meter watchcase, the impeller box water inlet, the impeller box delivery port, little opening to the side of impeller box is intake, the little opening in spacer screen side, the triangle check valve, gear box is arranged in to the counter, the hole on counter and gear box upper portion cooperatees and is connected, there is a boss gear box lower part, cooperate with impeller box through boss gear box and be connected, gear box is in water meter's core, the coaxial impeller box that packs into of impeller, the top center of installing in the impeller box bottom of impeller, the spacer screen connects at impeller box at the back, whole water meter overlaps in the water meter watchcase. The utility model discloses a counter character wheel window adopts the full sealing device of silica gel with the glass contact position, prevents into water, and the permanent ...

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Номер записи: 11
13-08-2021 дата публикации

Direct-drive wind turbine generator motor rotating speed control method, control system and grid-connected system

Номер: CN113258843A
Автор: LI ZHENG, HANG ZHAOFENG, GUO XIAOJIANG, QIAN KAIRONG, TANG HAIYAN, SU XINMIN, SHEN XUHUI, YANG LIHUA, SUN XU, ZHAO RUIBIN, FU MINGZHI, QIN MENG, LI CHUNHUA, YAO ZHONGYUAN, ZHANG YU, WANG WEIWEI, ZHAO JIANJIAN, 李铮, 杭兆峰, 郭小江, 钱开荣, 汤海雁, 苏新民, 申旭辉, 杨立华, 孙栩, 赵瑞斌, 付明志, 秦猛, 李春华, 姚中原, 张宇, 王威崴, 赵剑剑
Принадлежит:

The invention discloses a direct-drive wind turbine generator motor rotating speed control method, a control system and a grid-connected system. The control method provided by the embodiment of the invention comprises the steps that a rotating speed outer ring, an electromagnetic torque control ring and a power amplitude limiting link are added into a q-axis voltage control ring input instruction of a permanent magnet synchronous motor side converter at the same time; therefore, the purposes of controlling the rotating speed of the motor and the electromagnetic torque of the motor at the same time and achieving power amplitude limiting in the operation control process are achieved, and the control variable integrity of the control method is improved.

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Номер записи: 12
06-06-2023 дата публикации

Cooperative control method and device for offshore wind power flexible direct current system

Номер: CN116231712A
Автор: CHEN YIJING, GUO XIAOJIANG, YAO ZHONGYUAN, SHEN XUHUI, LI ZHENG, LI CHUNHUA, SUN XU, XI JIAWEN, HE WEIGUO, ZHANG JUNYANG, PENG CHENG, ZHANG ZHUOYU, ZHAO RUIBIN, FU MINGZHI, QIN MENG, JIANG XINGGUANG, YUAN HUI, SHI ZHENXING, SHI JUNJIAO, SHEN XIAOJIE, CHEN SHI, CHE XINGWEI, ZHANG HEPING
Принадлежит:

The invention provides a cooperative control method and device for an offshore wind power flexible direct current system. According to the method, rated frequency and rated voltage of a grid-side grid-connected point, a reactive power measured value and a reactive power reference value of a grid-side converter, a DC voltage measured value and a DC voltage rated value of a DC side of the grid-side converter, and an AC voltage measured value of an AC side of the grid-side converter are integrated; the grid-connected point current and the maximum current obtain a grid-side three-phase voltage reference value so as to control a grid-side converter; a machine-side three-phase voltage reference value is obtained by integrating the rated frequency and rated voltage of a machine-side grid-connected point, a reactive power measured value and a reactive power reference value of a machine-side converter, a direct-current voltage measured value and a direct-current voltage rated value of a direct-current ...

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Номер записи: 13
06-06-2023 дата публикации

Multi-converter parallel cooperative control method and device

Номер: CN116231727A
Автор: NIU CHENHUI, CHEN YIJING, GUO XIAOJIANG, LI CHUNHUA, LI ZHENG, SHEN XUHUI, SUN XU, ZHANG JUNYANG, XI JIAWEN, LUO HAIGUANG, ZHANG ZHUOYU, PENG CHENG, HE WEIGUO, FU MINGZHI, DAI LE, SHI JUNJIAO, QIAN CHUNCHUN, GU TENGFEI, GUO DONGXU, LI TIANYU
Принадлежит:

The invention provides a multi-converter parallel cooperative control method and device which are applied to a wind power grid-connected system comprising a full-power converter unit, the full-power converter unit comprises a plurality of parallel full-power converters, and each full-power converter comprises a grid-side converter and a machine-side converter. Any one full-power converter is used as a second converter, and each of the remaining full-power converters is used as a first converter; according to the method, direct-current voltage of a first converter, alternating-current voltage and first reactive power of a grid-side converter, q-axis current components and d-axis current components of the grid-side converter, maximum current, an active power reference value and an active power measurement value fed by a wind turbine generator, and rated frequency of the wind turbine generator are utilized; and obtaining a first modulation wave and a second modulation wave according to the ...

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Номер записи: 14
25-04-2023 дата публикации

Dynamic current limiting control method under power grid fault of full-power converter wind turbine generator

Номер: CN116014717A
Автор: CAO QINGWEI, CHEN YIJING, GUO XIAOJIANG, LI CHUNHUA, NIU CHENHUI, LI ZHENG, SUN XU, SHEN XUHUI, XI JIAWEN, ZHANG JUNYANG, ZHANG ZHUOYU, PENG CHENG, FU MINGZHI, ZHAO RUIBIN, ZHANG YU, HU HAO, ZHANG JINQI, JI QIUYANG, CHEN NINGLU, LIU WANGHAI
Принадлежит:

The invention provides a dynamic current-limiting control method for a full-power converter wind turbine generator under a power grid fault. The method comprises the following steps: acquiring a phase parameter generated by a grid-side converter under a grid-forming type control strategy; obtaining three-phase voltage and three-phase current of a grid connection point, and performing coordinate transformation to obtain a voltage dq component and a current dq component under a dq coordinate axis; obtaining a reference value of the current dq component according to the reference value of the voltage dq component and the voltage dq component; when the system has a power grid fault, adjusting the reference value of the current dq component based on the virtual impedance parameter of the grid-side controller and the current dq component to obtain the adjusted reference value of the current dq component; and performing inner loop control according to the adjusted reference value of the current ...

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Номер записи: 15
08-07-2015 дата публикации

Illegal parking vehicle information inputting method and system

Номер: CN104765859A
Автор: ZHANG SHAOFENG, ZHANG BO, FU MINGZHI
Принадлежит:

The invention belongs to the technical field of traffic control, and provides an illegal parking vehicle information inputting method and system. The method comprises the following steps that A, a monitor terminal monitors whether illegal parking vehicles exist in a preset parking prohibition area or not in real time, and snapshots the monitored illegal parking vehicles, and snapshot images are stored to a control side; B, the control side extracts illegal information in the snapshot images, and the illegal information includes the attribute information of the illegal parking vehicles, time stamp information and current parking area information; C, the control side uploads the illegal information to a traffic police client side, and the traffic police client side inputs the illegal information into a self electronic police database. The illegal parking vehicle information inputting method and system assist the traffic police in monitoring the illegal parking vehicles around large supermarkets ...

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Номер записи: 16
02-06-2023 дата публикации

Control method and device based on full-power converter wind turbine generator under weak power grid

Номер: CN116207778A
Автор: CHEN YIJING, GUO XIAOJIANG, LI CHUNHUA, LI ZHENG, SUN XU, SHEN XUHUI, YANG LIHUA, ZHAO RUIBIN, ZHANG ZHUOYU, PENG CHENG, FU MINGZHI, SUN XIAOJUN, LI BIHUI, HU HAO, ZHANG YING, CHEN YU, ZHU WENJING, ZHOU FEIFEI
Принадлежит:

The invention provides a control method and device based on a full-power converter wind turbine generator under a weak power grid. The method comprises the following steps: acquiring an output power reference value of a generator, a direct-current voltage of a full-power converter, an alternating-current side output power of a grid-side converter, an alternating-current voltage, a reactive power, a maximum current, and a q-axis current component and a d-axis current component of the grid-side converter; obtaining a q-axis current reference value based on the AC voltage or the reactive power; obtaining a d-axis current reference value based on the q-axis current reference value, the maximum current, the direct-current voltage, the alternating-current side output power of the grid-side converter and the output power reference value; and obtaining a d-axis voltage reference component and a q-axis voltage reference component based on the q-axis current reference value, the d-axis current reference ...

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Номер записи: 17
02-05-2023 дата публикации

Offshore wind power true bipolar flexible direct current system operation mode switching method and device

Номер: CN116054222A
Автор: CHEN YIJING, GUO XIAOJIANG, LIU ANCANG, LI ZHENG, SHEN XUHUI, LI CHUNHUA, CHEN JUNRONG, ZHANG JUNYANG, SUN XU, XI JIAWEN, ZHANG ZHUOYU, WANG HAOGUANG, SUN WEISHENG, JIA SONG, PENG CHENG, ZHAO RUIBIN, FU MINGZHI, QIN MENG, JIANG XINGGUANG, LIU GUOFENG, HU XUJIA, LI HONGKAI, XU LONGBIN, ZENG YUHUI
Принадлежит:

The invention provides an offshore wind power true bipolar flexible direct current system operation mode switching method and device, and the method comprises the steps: detecting whether a fault occurs in a current converter, and generating a locking instruction if a fault occurs in one current converter or two positive/negative current converters; locking the four current converters based on the locking instruction, and disconnecting incoming line switches of all the connected transformers; the faulted current converter and neutral line bus switches of the same positive/negative current converters are closed, the remaining two current converters comprise a machine side target current converter and a network side target current converter, and an incoming line switch of a coupling transformer connected with the network side target current converter is closed; and obtaining the direct current line voltage of the flexible direct current system and the alternating current voltage of the machine ...

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Номер записи: 18
06-06-2023 дата публикации

Method and device for dynamically adjusting and controlling DC voltage of offshore wind power flexible DC system

Номер: CN116231713A
Автор: CHEN YIJING, GUO XIAOJIANG, ZHANG WANXIONG, SUN XU, LI CHUNHUA, LI ZHENG, SHEN XUHUI, XI JIAWEN, ZHANG JUNYANG, HE WEIGUO, PENG CHENG, ZHANG ZHUOYU, SHI ZHUANG, LIU YUXIN, BA LEI, JIANG XINGGUANG, FU MINGZHI, ZHAO RUIBIN, QIN MENG, LI CHENCHEN
Принадлежит:

The invention provides an offshore wind power flexible direct current system direct current voltage dynamic regulation control method and an offshore wind power flexible direct current system direct current voltage dynamic regulation control device. The method comprises the following steps: acquiring rated frequency and rated voltage of a grid-side grid-connected point, a reactive power measured value and a reactive power reference value of a grid-side converter, a direct-current voltage measured value and a direct-current voltage rated value of a direct-current side of the grid-side converter, an alternating-current voltage measured value of an alternating-current side of the grid-side converter, and current and maximum current of the grid-connected point; obtaining a phase reference value and a voltage reference value by using the rated frequency, the DC voltage measured value, the DC voltage rated value rated voltage, the reactive power measured value and the reactive power reference ...

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Номер записи: 19
02-05-2023 дата публикации

Power grid voltage support control method and device based on full-power converter wind turbine generator

Номер: CN116054288A
Автор: CHEN YIJING, GUO XIAOJIANG, LI CHUNHUA, YAO ZHONGYUAN, LI ZHENG, SHEN XUHUI, SUN XU, XI JIAWEN, ZHANG JUNYANG, ZHANG ZHUOYU, PENG CHENG, FU MINGZHI, HE WEIGUO, ZHANG YU, SHI ZHENXING, SUN JIE, PAN HENAN, FAN WENJIANG, QIN XUEYAN, XIE QINTIAN
Принадлежит:

The invention provides a power grid voltage support control method and device for a wind turbine generator based on a full-power converter, and the method comprises the steps: obtaining an AC voltage, a reactive power, a q-axis current component and a d-axis current component of a grid-side converter, the direct-current voltage and the maximum current of the full-power converter, the active power reference value and the active power measurement value fed by the wind turbine generator set, and the rated frequency of the wind turbine generator set; calculating a reference frequency based on the rated frequency, the active power reference value and the active power measurement value; obtaining a q-axis current reference value and a d-axis current reference value based on the AC voltage or reactive power, the maximum current and the DC voltage; obtaining a d-axis voltage reference component and a q-axis voltage reference component based on the q-axis current reference value, the d-axis current ...

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Номер записи: 20
02-06-2023 дата публикации

Cooperative control method and device under fault of offshore wind power multi-feeder collection system

Номер: CN116207794A
Автор: PANG RAN, CHEN YIJING, GUO XIAOJIANG, LI CHUNHUA, LI ZHENG, ZHANG JUNYANG, XI JIAWEN, SHEN XUHUI, SUN XU, PENG CHENG, ZHANG ZHUOYU, QIAN KAIRONG, FU MINGZHI, ZHAO JIANJIAN, SUN JIE, XU KAIRUI, LIU YIFENG, ZHANG YING, YANG DACHANG
Принадлежит:

The invention provides a cooperative control method and device under the fault of an offshore wind power multi-feeder collection system, and the method comprises the steps: obtaining the active power of all wind generating sets and the preset active power needing to be reduced when a flexible DC system of an offshore wind power plant breaks down; the transmission power of each feeder line is obtained based on the active power of all the wind generating sets, and then the target active power is obtained; constructing a constraint condition based on the transmission power of each feeder line, the on-off coefficient of each feeder line and the target active power, and constructing a target function based on the number of the wind generating sets of each feeder line and the on-off coefficient of each feeder line; and under the condition that the constraint condition is met, solving the target function to obtain an optimal value of the on-off coefficient, and controlling the on-off of the feeder ...

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Номер записи: 21
11-04-2023 дата публикации

Fault ride-through method and device for offshore wind power flexible direct current power transmission system

Номер: CN115954923A
Автор: CHEN YIJING, GUO XIAOJIANG, LI ZHENG, LIU ANCANG, LI CHUNHUA, SUN XU, SHEN XUHUI, XI JIAWEN, ZHANG JUNYANG, ZHANG ZHUOYU, PENG CHENG, FU MINGZHI, ZHAO RUIBIN, JIANG XINGGUANG, CHEN JUNRONG, WANG HAOGUANG, SUN WEISHENG, JIA SONG, LIU GUOFENG, HU XUJIA, LI HONGKAI, XU LONGBIN, ZENG YUHUI
Принадлежит:

The invention provides a fault ride-through method and device for an offshore wind power flexible direct-current power transmission system. The method comprises the following steps: acquiring a three-phase voltage measured value, a three-phase current measured value and a d-axis voltage reference value of an alternating-current side of a machine-side converter, and a preset maximum current, a fundamental wave angular frequency and a preset maximum voltage of the machine-side converter during a fault period of a machine-side grid-connected point; for the positive sequence and the negative sequence, corresponding dq-axis voltage and dq-axis current are obtained through Park transformation based on the three-phase voltage measured value, the three-phase current measured value and the fundamental wave angular frequency; for the positive sequence and the negative sequence, generating a positive-sequence three-phase voltage reference value and a negative-sequence three-phase voltage reference ...

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Номер записи: 22