基于SVG的光伏并网SSO附加阻尼抑制策略

doi:10.11930/j.issn.1004-9649.202010078

中国电力 ›› 2021, Vol. 54 ›› Issue (12): 11-19,44.DOI: 10.11930/j.issn.1004-9649.202010078

• 国家“十三五”智能电网重大专项专栏：（九）柔性交流输配电技术 • 上一篇下一篇

基于SVG的光伏并网SSO附加阻尼抑制策略

张帆¹, 高本锋², 李铁成³

1. 国网河北省电力有限公司保定市供电公司, 河北保定 071000;
2. 河北省分布式储能与微网重点实验室(华北电力大学), 河北保定 071003;
3. 国网河北省电力有限公司电力科学研究院, 河北石家庄 050021

收稿日期:2020-10-26 修回日期:2021-09-08 出版日期:2021-12-05 发布日期:2021-12-16
作者简介:张帆(1995-),女,通信作者,硕士,从事电力系统次同步振荡研究,E-mail:zhangfananni@163.com;高本锋(1981-),男,博士,副教授,从事高压直流输电和电力系统次同步振荡研究,E-mail:gaobenfeng@126.com;李铁成(1980-),男,硕士,高级工程师(教授级),从事电力系统继电保护与稳定控制技术研究,E-mail:ltc8086@163.com
基金资助:
国家自然科学基金资助项目（51507064）；教育部中央高校基本科研业务费专项资金资助项目（2018 MS087）。

SVG Based Supplementary Damping Mitigation Strategy for Sub-Synchronous Oscillation in Grid-connected Photovoltaic Plants

ZHANG Fan¹, GAO Benfeng², LI Tiecheng³

1. Baoding Power Supply Company of State Grid Hebei Electric Power Co., Ltd., Baoding 071000, China;
2. Key Laboratory of Distributed Energy Storage and Microgrid of Hebei Province (North China Electric Power University), Baoding 071003, China;
3. State Grid Hebei Electric Power Co., Ltd., Electric Power Research Institute, Shijiazhuang 050021, China

Received:2020-10-26 Revised:2021-09-08 Online:2021-12-05 Published:2021-12-16
Supported by:
This work is supported by National Natural Science Foundation of China (No.51507064) and Fundamental Research Funds for the Central Universities of the Ministry of Education (No.2018MS087).

摘要/Abstract

摘要： 针对大规模光伏(photovoltaic, PV)并入弱交流电网的次同步振荡(sub-synchronous oscillation, SSO)问题，提出一种基于静止无功发生器(static var generator, SVG)附加阻尼控制策略抑制的方法。该方法提取PV并网点电压作为输入信号，通过附加次同步阻尼控制器(supplementary sub-synchronous damping controller, SSDC)生成与并网点次同步电压同相位的次同步电流信号，使SVG在次同步频率下等效为并联接入系统的正电阻，消耗SSO能量实现抑制。此外，详细分析了SSDC的结构和参数设计方法。最后，以西北某PV电站为实例，通过电磁暂态仿真验证了上述抑制控制策略在多种工况下的有效性，该控制策略可提高光伏系统的稳定裕量。

关键词: 静止无功发生器, 光伏电站, 弱交流电网, 次同步振荡, 附加阻尼控制

Abstract: To mitigate the sub synchronous oscillation (SSO) in large-scale photovoltaic (PV) plants integrated to weak AC networks, a static var generator (SVG) based supplementary damping control strategy is proposed. The strategy extracts the voltage at the PV coupling point as input signal, and produces the sub-synchronous current that is in the same phase with the sub-synchronous voltage at the coupling point through supplementary sub-synchronous damping controller (SSDC). Thus, the SVG is equivalent to the positive resistance of the accessing the system in parallel at the sub-synchronous frequency, and dissipates the SSO energy for suppression. In addition, the structure and parameter design method of SSDC are analyzed in detail. Finally, taking a PV plant in northwest China as an example, the mitigation effectiveness of the proposed control strategy is verified under various working conditions through electromagnetic transient simulation, which shows that the proposed control strategy can improve the stability margin of the photovoltaic system.

Key words: static var generator, photovoltaic plant, weak AC networks, sub-synchronous oscillation, supplementary damping control

张帆, 高本锋, 李铁成. 基于SVG的光伏并网SSO附加阻尼抑制策略[J]. 中国电力, 2021, 54(12): 11-19,44.

ZHANG Fan, GAO Benfeng, LI Tiecheng. SVG Based Supplementary Damping Mitigation Strategy for Sub-Synchronous Oscillation in Grid-connected Photovoltaic Plants[J]. Electric Power, 2021, 54(12): 11-19,44.

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基于SVG的光伏并网SSO附加阻尼抑制策略

SVG Based Supplementary Damping Mitigation Strategy for Sub-Synchronous Oscillation in Grid-connected Photovoltaic Plants

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基于SVG的光伏并网SSO附加阻尼抑制策略

SVG Based Supplementary Damping Mitigation Strategy for Sub-Synchronous Oscillation in Grid-connected Photovoltaic Plants

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