风电直流送出系统送端交流故障下风机过电压研究

doi:10.11930/j.issn.1004-9649.202212099

中国电力 ›› 2023, Vol. 56 ›› Issue (4): 28-37.DOI: 10.11930/j.issn.1004-9649.202212099

• 新能源基地经直流送出系统稳定性分析与控制技术 • 上一篇下一篇

风电直流送出系统送端交流故障下风机过电压研究

梁伟¹, 吴林林², 赖启平¹, 李东晟¹, 徐曼², 沈沉¹

1. 清华四川能源互联网研究院, 四川成都 610213;
2. 国网冀北电力有限公司电力科学研究院(风光储并网运行与实证技术国家电网公司实验室), 北京 100045

收稿日期:2022-12-29 修回日期:2023-02-23 出版日期:2023-04-28 发布日期:2023-04-26
作者简介:梁伟(1990-),男,博士研究生,从事特高压直流输电技术研究,E-mail:liang-w19@mails.tsinghua.edu.cn;沈沉(1970-),男,通信作者,教授,博士生导师,从事能源电力系统数字孪生、电力系统分析与控制研究,E-mail:shenchen@mail.tsinghua.edu.cn
基金资助:
国网冀北电力有限公司科技项目（新能源机组控制性能对大规模新能源并网送出能力影响机理及优化方法研究，52018K20007J）。

Study on Overvoltage of Wind Farm Under AC Fault at Sending End of HVDC Transmission System

LIANG Wei¹, WU Linlin², LAI Qiping¹, LI Dongsheng¹, XU Man², SHEN Chen¹

1. Sichuan Energy Internet Research Institute, Tsinghua University, Chengdu 610213, China;
2. State Grid Jibei Electric Power Co., Ltd. Research Institute (Grid-Connected Operation and Demonstration Technology for Wind-Solar-Storage Hybrid System State Grid Corporation Laboratory), Beijing 100045, China

Received:2022-12-29 Revised:2023-02-23 Online:2023-04-28 Published:2023-04-26
Supported by:
This work is supported by Science and Technology Project of State Grid Jibei Electric Power Co., Ltd. (Research on the Mechanism and Optimization Method of Renewable Energy Unit Control Performance on Large-Scale New Energy Grid-Connected Transmission Capability, No.52018K20007J).

摘要/Abstract

摘要： 当受端交流系统短路比较小时，送端交流系统故障扰动可能会引起逆变器换相失败并在直流送端交流母线处产生过电压现象。针对直流送端交流故障引起送端风电场并网点处过电压的机理和影响因素进行研究。首先，建立风电经特高压直流外送系统的电磁暂态模型；然后，分析不同送端故障下风电场和直流动态特性对风电场并网点处暂态电压影响的机理；最后，对影响风电场并网点暂态电压变化的因素进行分析和仿真验证。研究结果表明，风电场并网点处暂态电压的变化主要受直流整流站交流母线电压以及风电场功率恢复响应特性的影响；风电场容量、风速等因素在单一变化和不同组合下对风电场并网点电压的影响特性存在差异。

关键词: 风电场, 过电压, 换相失败, 高压直流输电, 低电压穿越

Abstract: When the short circuit ratio of receiving end AC system is small, the fault disturbance of sending end AC system may cause commutation failure of the inverter and overvoltage at the LCC-HVDC sending end AC bus. This paper studies the mechanism and influencing factors of overvoltage at the point of common connection (PCC) of the wind farm caused by an AC fault at the HVDC sending end. Firstly, an electromagnetic transient model is established for UHVDC wind power transmission system. Secondly, the influence mechanism of the wind farm and HVDC dynamic characteristics on the transient voltage at the PCC of wind farm under different sending end faults is analyzed. Then, the factors affecting the transient voltage variation at the PCC of the wind farm are analyzed and verified by simulation. The results show that the variation of transient voltage at the PCC of the wind farm is mainly affected by the AC bus voltage of the rectifier station and the power response characteristics of the wind farm. In addition, it is found that the influence characteristics of wind farm capacity, wind speed, and other factors on the voltage at the PCC of wind farm are different under single change and different combinations.

Key words: wind farm, overvoltage, commutation failure, HVDC, low voltage ride through

梁伟, 吴林林, 赖启平, 李东晟, 徐曼, 沈沉. 风电直流送出系统送端交流故障下风机过电压研究[J]. 中国电力, 2023, 56(4): 28-37.

LIANG Wei, WU Linlin, LAI Qiping, LI Dongsheng, XU Man, SHEN Chen. Study on Overvoltage of Wind Farm Under AC Fault at Sending End of HVDC Transmission System[J]. Electric Power, 2023, 56(4): 28-37.

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风电直流送出系统送端交流故障下风机过电压研究

Study on Overvoltage of Wind Farm Under AC Fault at Sending End of HVDC Transmission System

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风电直流送出系统送端交流故障下风机过电压研究

Study on Overvoltage of Wind Farm Under AC Fault at Sending End of HVDC Transmission System

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