风电并网系统小干扰概率稳定性分析与改善

边晓燕; 耿艳; 李学武; 符杨; 王倩

引用本文:	边晓燕,耿艳,李学武,等.风电并网系统小干扰概率稳定性分析与改善[J].电力系统保护与控制,2015,43(20):1-7.
	BIAN Xiaoyan,GENG Yan,LI Xuewu,et al.Probabilistic small-signal stability analysis and improvement of power system with wind farm integration[J].Power System Protection and Control,2015,43(20):1-7

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风电并网系统小干扰概率稳定性分析与改善
边晓燕¹, 耿艳¹, 李学武¹, 符杨¹, 王倩²
1.上海电力学院电气工程学院，上海 200090;2.上海绿色环保能源有限公司，上海 200433

摘要:

在桨距角控制系统中加装电力系统稳定器(PSS)以阻尼电力系统低频振荡，并且考虑系统运行方式的随机不确定性，利用累积概率曲线来获得随机变量的概率数字特征。采用基于数值分析的概率方法研究含风电场系统的小干扰稳定统计属性。通过在含风电场的五机两区域系统中进行仿真，验证在桨距角控制系统中安装PSS对改善小干扰概率稳定性的有效性，并对其改善效果进行评估。仿真结果表明，在桨距角控制系统中加装PSS能有效抑制本地振荡模式，并削弱区间振荡。

关键词: 桨距角控制电力系统稳定器低频振荡累积概率小干扰稳定

DOI：10.7667/j.issn.1674-3415.2015.20.001

分类号:

基金项目:上海市科委科技创新项目(14DZ1200905);上海市教委科研创新项目(12ZZ172); 上海绿色能源并网工程技术研究中心(13DZ2251900)

Probabilistic small-signal stability analysis and improvement of power system with wind farm integration

BIAN Xiaoyan¹, GENG Yan¹, LI Xuewu¹, FU Yang¹, WANG Qian²

1.School of Electric Power Engineering, Shanghai University of Electric Power, Shanghai 200090, China;2.Shanghai Green Energy Co., Ltd., Shanghai 200433, China

Abstract:

A power system stabilizer (PSS) is installed in pitch control system to damp low frequency oscillation of power system, taking into consideration of the stochastic uncertainty of system operating conditions. Cumulative probability curves are employed to obtain probability numerical characteristics of stochastic variables. The probabilistic method based on numerical analysis is used to study small-signal stability statistical attributes of power system with wind farm integration. Through simulation on a five-machine two-area system with wind farm integration, the effectiveness that a PSS is installed in pitch control system to improve probabilistic small-signal stability is verified, and the improvement of PSS is evaluated. Simulation results demonstrate that the installation of PSS in pitch control system could suppress effectively local oscillation and weaken inter-area oscillation.

Key words: pitch control power system stabilizer (PSS) low-frequency oscillation cumulative probability small-signal stability

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