基于二次型函数指标的双馈风机对系统电压稳定性影响的分析  

Analysis on DFIGs influence to system voltage stability based on quadratic function indexes

作　　者：李培强[1] 周丽英[1] 李欣然[1] 胡泽[1] 邱时严 曾小军[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电力科学与技术学报》2016年第1期17-24,共8页Journal of Electric Power Science And Technology

基　　金：国家重点基础研究计划("973"计划)(2012CB215106);国家自然科学基金(51277055)

摘　　要：以奇异值分解法为理论依据,采用具有"二次型"函数特性的静态分析指标,研究双馈感应风电机组在不同接入位置下对电力系统静态电压稳定性的影响。通过电力系统分析软件PSAT对双馈机组并网的4机2区域系统和IEEE 39节点测试系统进行仿真计算,仿真结果表明:利用二次型指标来分析判断系统的稳定性程度以及系统无功补偿节点的选择,比奇异值分解法更灵敏,并可有效地改善和提高风电场并网系统的电压水平和电压稳定性;接入位置不同会引起系统电压稳定程度的不同变化,其接入发电机侧对系统电压稳定性影响不明显,接入负荷区域则会减弱系统的静态电压稳定性。Based on the theory of singular value decomposition,the static analysis indexes with the characteristics of quadratic function were adopted in this paper,in order to study the voltage stability of power system caused by different grid-connected positions of double-fed induction generators（DFIGs）.By using apower system analytical software PSAT,simulations and calculations had been done on the grid connected by two-area four-generator power system and IEEE 39-bus test system of DFIGs.The experimental results show that the voltage stability of the grid connected by wind power stations can be improved effectively by using quadratic index to analyze the stability level and choose the reactive compensation node of power system,which is more sensitive than singular value decomposition method.The positions of grid-connected DFIGs can change the static voltage sensitivity.It will improve that static voltage stability do not change significant-ly when DFIGs is connected to generator areas,and will weaken static voltage stability when DFIG is connected to load areas.

关 键 词：双馈风机 静态电压稳定 奇异值分解法 二次型指标 无功补偿 

分 类 号：TM711[电气工程—电力系统及自动化]