| 基于超级电容蓄能的永磁同步海上风电低电压穿越研究 |
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| 引用本文： | 刘诗涵,周羽生,许振华,陈辉,刘超智,周顺. 基于超级电容蓄能的永磁同步海上风电低电压穿越研究[J]. 电力系统保护与控制, 2018, 46(5): 9-15 |
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| 作者姓名： | 刘诗涵 周羽生 许振华 陈辉 刘超智 周顺 |
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| 作者单位： | 智能电网运行与控制湖南省重点实验室长沙理工大学，湖南 长沙 410114,智能电网运行与控制湖南省重点实验室长沙理工大学，湖南 长沙 410114,福建大唐国际新能源有限公司，福建 厦门 361008,智能电网运行与控制湖南省重点实验室长沙理工大学，湖南 长沙 410114,智能电网运行与控制湖南省重点实验室长沙理工大学，湖南 长沙 410114,智能电网运行与控制湖南省重点实验室长沙理工大学，湖南 长沙 410114 |
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| 基金项目： | 国家自然科学基金(51407013);湖南省高等学校创新平台基金资助项目(14K001) |
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| 摘 要： | 为避免电网电压跌落导致海上风电机组脱网运行，分析了直驱永磁同步海上风电系统的双PWM全功率变流器控制策略，提出了一种基于超级电容器蓄能的海上风电机组并网运行低电压穿越方案。在双向变流器的直流侧并联超级电容蓄能系统，利用超级电容来维持电网故障时的功率平衡，稳定直流侧母线电压。利用网侧变流器静止无功补偿运行模式控制无功电流输出，向电网提供无功功率支持。仿真结果表明了该方案在电网故障时，能有效抑制直流侧过电压，向电网提供无功功率，有利于电网故障恢复，提高了直驱永磁海上风电系统的低电压穿越能力。
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| 关 键 词： | 海上风电；超级电容蓄能系统；低电压穿越；永磁同步发电机 |
| 收稿时间： | 2017-02-13 |
| 修稿时间： | 2017-04-29 |
Research on low-voltage ride through capability of permanent magnetic synchronous offshore wind power based on super-capacitor energy storage |
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| LIU Shihan,ZHOU Yusheng,XU Zhenhu,CHEN Hui,LIU Chaozhi and ZHOU Shun. Research on low-voltage ride through capability of permanent magnetic synchronous offshore wind power based on super-capacitor energy storage[J]. Power System Protection and Control, 2018, 46(5): 9-15 |
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| Authors: | LIU Shihan ZHOU Yusheng XU Zhenhu CHEN Hui LIU Chaozhi ZHOU Shun |
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| Affiliation: | Smart Grids Operation and Control Key Laboratory of Hunan Province, Changsha University of Science and Technology, Changsha 410114, China,Smart Grids Operation and Control Key Laboratory of Hunan Province, Changsha University of Science and Technology, Changsha 410114, China,Fujian Datang International New Energy Company Limited, Xiamen 361008, China,Smart Grids Operation and Control Key Laboratory of Hunan Province, Changsha University of Science and Technology, Changsha 410114, China,Smart Grids Operation and Control Key Laboratory of Hunan Province, Changsha University of Science and Technology, Changsha 410114, China and Smart Grids Operation and Control Key Laboratory of Hunan Province, Changsha University of Science and Technology, Changsha 410114, China |
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| Abstract: | In order to avoid offshore wind turbine off grid operation caused by grid voltage sag, the control strategy of dual PWM full power converter for direct drive permanent magnet synchronous with offshore wind power system is analyzed, a scheme of Low Voltage Ride Through (LVRT) for offshore wind turbines during grid-connected operation is presented based on Super-Capacitor Energy Storage System (SC_ESS). By paralleling super-capacitor energy storage system on the DC side of the bidirectional converter, this paper uses the super capacitor to stabilize the power balance during the grid fault and ensure the stability of the DC side voltage; it adopts static var compensation operation mode of grid-side converter to prior output reactive current and provide reactive power support to the grid. Simulation results show that under system fault, the presented scheme can efficiently restrain the DC side overvoltage, provide reactive power to the power system, speed up the restoration of power grid fault, and improve the LVRT capability of the offshore wind power system. This work is supported by National Natural Science Foundation of China (No. 51407013). |
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| Keywords: | offshore wind power super-capacitor energy storage system low-voltage ride through permanent magnet synchronous generator |
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