基于柔性负荷及UPFC的低频振荡抑制策略

张宁宇; 刘建坤; 陈静; 姚阳; 包宇庆; 陈培培; 周雪婷

引用本文:	张宁宇,刘建坤,陈静,等.基于柔性负荷及UPFC的低频振荡抑制策略[J].电力系统保护与控制,2019,47(10):82-87.
	ZHANG Ningyu,LIU Jiankun,CHEN Jing,et al.Low frequency oscillation suppression method based on flexible load and UPFC[J].Power System Protection and Control,2019,47(10):82-87

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基于柔性负荷及UPFC的低频振荡抑制策略
张宁宇¹,刘建坤¹,陈静¹,姚阳²,包宇庆²,陈培培²,周雪婷²
(1.国网江苏省电力有限公司电力科学研究院，江苏南京 211103; 2.南京师范大学南瑞电气与自动化学院，江苏南京 210023)

摘要:

随着电力系统结构日益复杂，越来越多的区域电网逐渐实现互联。如何提高电力系统稳定性、供电可靠性成为急需解决的问题。低频振荡是随着电网互联而产生的，给电网安全稳定运行带来了巨大的挑战。研究了大规模柔性负荷及统一潮流控制器(UPFC)相结合的协同控制策略，抑制电力系统低频振荡。建立基于频率反馈的大规模柔性负荷控制策略，并针对UPFC串联侧设计基于功率反馈附加控制策略。最后采用遗传算法对柔性负荷与UPFC协同控制策略的各参数进行优化，得到最优协同控制策略。通过算例验证了该控制策略的有效性。

关键词: 柔性负荷 UPFC 低频振荡

DOI：10.7667/PSPC20191011

分类号:

基金项目:国家自然科学基金项目资助(51707099)

Low frequency oscillation suppression method based on flexible load and UPFC

ZHANG Ningyu¹,LIU Jiankun¹,CHEN Jing¹,YAO Yang²,BAO Yuqing²,CHEN Peipei²,ZHOU Xueting²

(1. State Grid Jiangsu Electrical Power Company Research Institute, Nanjing 211103, China;2. NARI School of Electrical Engineering and Automation, Nanjing Normal University, Nanjing 210023, China)

Abstract:

With the increasing complexity of the power system, more and more regional power grids are connected with each other. Hence, how to improve the stability and reliability of the power system is in urgent need to be solved. Low frequency oscillation, generated from the connection of different grids, brings high challenge to the safe and stable operation of the power grids. In this paper, the collaborative control strategy of large-scale flexible load and Unified Power Flow Controller (UPFC) is studied to suppress the low-frequency oscillation of the power system. The control strategy for large-scale flexible load based on frequency feedback is established, and the additional control strategy based on active-power feedback is designed at the UPFC series side. Finally, genetic algorithm is adopted to optimize the parameters of the cooperative control strategy, so as to develop an optimal cooperative control strategy. The proposed method is validated by numerous examples. This work is supported by National Natural Science Foundation of China (No. 51707099).

Key words: flexible load UPFC low frequency oscillation

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