风电场抵御连锁脱网能力评估及指标灵敏度分析  

Immunity Capability Assessment of Wind Farms Against Cascading Trip-off and Indicators Sensitivity Analysis

作　　者：葛江北 周明 李庚银 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市102206

出　　处：《电力系统自动化》2015年第4期4-11,共8页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51190103);国家科技支撑计划资助项目(2012AA050208)~~

摘　　要：风电场连锁脱网事故影响了系统的安全稳定运行,因而梳理导致风电场连锁脱网的因素、综合评估风电场抵御连锁脱网的能力,进而提出针对性的改善措施是非常必要的。以双馈感应发电机(doubly-fed induction generator,DFIG)为例,分析了DFIG风电机组复杂的动态电压演变过程,提出了DFIG风电机组电压耐受曲线的概念,对风电机组连锁脱网的机理进行了分析。在此基础上,利用区间层次分析法(interval analytic hierarchy process,IAHP),建立了各影响因素的多层次结构模型,用于评估风电场抵御连锁脱网的综合能力。同时通过边际指标值的灵敏度分析给出了一种相对关键性因素分析方法。最后通过算例分析验证了所提方法的有效性,并针对性地提出风电场的改善措施。The stable operation of power system is impacted by cascading trip-off of wind farms,it is very necessary to find out the key factors that cause the cascading trip-off of wind farms,and to assess the immunity capability of such events and put forward the corresponding improvement measures.Taking doubly fed induction generator（DFIG） as an example and focusing on dynamic voltage evolving process,a concept of voltage tolerance curve for DFIG wind turbine is proposed,and the mechanism analysis of cascading trip-off is performed.On that basis,an interval analytic hierarchy process is used to establish a hierarchical structure model of multiple factors for the immunity capability assessment.Moreover,an approach is proposed to find the key indicators depending on the selected target using the marginal indicators sensitivity analysis.Finally,case studies verify the effectiveness of proposed method and the corresponding improvement measures are proposed.

关 键 词：风力发电 双馈感应发电机 连锁脱网 区间层次分析法 边际指标值 灵敏度分析 

分 类 号：TM614[电气工程—电力系统及自动化]