风电接入对电力系统小干扰稳定影响分析方法  

Analysis Method for the Influence of Wind Power Integration on Small-signal Stability of Power System

作　　者：姜惠兰[1] 白玉苓 王绍辉 肖瑞 JIANG Huilan;BAI Yuling;WANG Shaohui;XIAO Rui(Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]智能电网教育部重点实验室(天津大学),天津300072

出　　处：《电力系统及其自动化学报》2021年第9期9-16,共8页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(51477115)。

摘　　要：随着风电大规模应用,分析风电场接入对电力系统小干扰稳定性的影响日益重要。本文从风电场实际接入位置入手,提出一种含风电场的电力系统小干扰稳定性分析方法。基于风电场等效导纳模型实现系统节点导纳矩阵的收缩处理,将风电场输出功率特性转化为对各同步机电磁功率的影响,进而将风电场的影响反映到系统状态方程中,再依据特征根分析法实现风电场接入对系统小干扰稳定性影响的量化分析。该方法无需列写双馈风机的状态方程,一定程度上降低了计算复杂度。针对风电场不同出力时系统小干扰稳定性进行了仿真对比,验证了所提方法的有效性。With the large-scale application of wind power,it is increasingly important to analyze the influence of wind farm integration on the small-signal stability of power system.In this paper,starting from the actual location of a wind farm,an analysis method for the small-signal stability of power system with wind farm is proposed.Based on the equivalent admittance model of the wind farm,the contraction of system node admittance matrix is realized,and the output power characteristics of the wind farm are transformed into the influence on the electromagnetic power of each synchronous machine.Then,the influence of the wind farm is incorporated into the system state equation,and the influence on the system’s small-signal stability is quantified using the eigenvalue analysis method.The state equation of doubly-fed induction generator(DFIG)is not required by this method,which reduces the computational complexity to a certain extent.The small-signal stability of the system under different output conditions of the wind farm is simulated and compared,thus verifying the effectiveness of the proposed method.

关 键 词：双馈风机 电磁功率 小干扰稳定性 电力系统 特征根分析法 

分 类 号：TM712[电气工程—电力系统及自动化]