基于理想点法的多准则综合灵敏度电压稳定评估指标  

Multi-criterion integrated-sensitivity voltage stability evaluation index based on ideal point method

作　　者：李佳[1,2] 刘天琪[1] 陈亮[1] 李兴源[1] 江东林[1] 史华勃[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]国网四川省电力公司技能培训中心,四川成都610072

出　　处：《电力自动化设备》2014年第3期108-112,共5页Electric Power Automation Equipment

基　　金：国家高技术研究发展计划(863计划)项目(2011-AA05A119);国家自然科学基金资助项目(51037003)~~

摘　　要：针对目前静态电压稳定评估方法多从单一角度、用一种变量与电压的关系进行评估的局限性,提出一种新的多准则综合灵敏度电压稳定评估指标。该指标基于理想点法,结合电压/有功功率灵敏度和电压/无功功率灵敏度指标,从而达到联系有功功率和无功功率的目的。该指标无需标准化处理,可克服因量纲不同和数值数量级差异造成的结果偏差。为解决理想点法难以选择权重系数的问题,提出一种能够计及负荷增长方向的权重系数选择方法。通过实际电网算例验证了所提指标的合理性和有效性。Aiming at the shortage that the present static voltage stability methods only consider the relationship between one variable and voltage from single perspective,a multi-criterion integrated-sensitivity index is proposed for voltage stability evaluation,which,based on ideal point method,integrates the voltage/ active-power sensitivity index and the voltage/reactive-power sensitivity index to combine the active power with the reactive power.Without standardization,it eliminates the errors caused by the difference of dimension and magnitude.The ideal point method is incapable of selecting weight coefficient,aiming at which,a weight coefficient selection method considering load increment direction is proposed.A practical grid case verifies the rationality and effectiveness of the proposed index.

关 键 词：电压稳定 评估指标 理想点法 灵敏度分析 权重系数 模型 

分 类 号：TM714.2[电气工程—电力系统及自动化]