风电接入系统的电压越限薄弱节点综合识别  

Comprehensive Identification of Voltage Violation Weak Nodes in Wind Power Integration System

作　　者：李梦珊 蔺红[1] 张良 祁世琛 LI Mengshan;LIN Hong;ZHANG Liang;QI Shichen(School of Electrical Engineering,Xinjiang University,Urumqi 830017,Xinjiang,China;Xinjiang Electric Power Research Institute of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830001,Xinjiang,China;Urumqi Power Supply Company of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830000,Xinjiang,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830017 [2]国网新疆电力有限公司电力科学研究院,新疆乌鲁木齐830001 [3]国网新疆电力有限公司乌鲁木齐供电公司,新疆乌鲁木齐830000

出　　处：《水力发电》2022年第12期74-80,共7页Water Power

基　　金：国家自然科学基金资助项目(51667019);国网新疆电力有限公司科技项目(5230DK20004V)。

摘　　要：针对风电接入系统的电压安全问题,提出了一种电压越限薄弱节点综合识别方法。首先,引入拉格朗日乘数法快速计算节点电压越限临界点、静态电压安全域边界,提出了判别节点电压安全状态、强弱的有向电压安全裕度计算方法;然后,利用熵值法计算多风电场系统无功-电压灵敏度权重,提出对风电无功敏感的节点识别方法;最后,结合电压安全裕度和无功-电压灵敏度制定了电压薄弱节点综合识别方法。算例分析表明,所提方法对电压越限薄弱节点的识别更加全面,对系统电压安全运行具有一定指导意义。Aiming at voltage security problems in wind power integration system,a comprehensive identification method of voltage violation weak nodes is proposed.First,the Lagrange multiplier method is introduced to quickly calculate the voltage violation critical points and static voltage security region(SVCR)boundary of nodes,and the way of calculating the directed voltage security margin to judge the security state and strength of node voltage is proposed.Then,the reactive power-voltage sensitivity weight of multi-wind farm system is determined by entropy method,and the identification method of voltage weak nodes sensitive to reactive power of wind power nodes is proposed.Finally,the comprehensive identification method of voltage weak nodes is developed by integrating voltage security margin and reactive power-voltage sensitivity.The example analysis results show that the proposed method is more comprehensive for the identification of voltage violation weak nodes,and has certain guiding significance for the security of voltage in power system.

关 键 词：风电 电压越限 静态电压安全域 灵敏度 薄弱节点 

分 类 号：TM712[电气工程—电力系统及自动化]