基于节点导纳矩阵形式的在线电压稳定分析  

On-line Voltage Stability Analysis Based on Bus Admittance Matrix Form

作　　者：艾琳[1] 姜彤[1] 杨以涵[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206

出　　处：《中国电机工程学报》2010年第22期51-56,共6页Proceedings of the CSEE

基　　金：国家高技术研究发展计划项目(863计划)(2009AA12Z328)~~

摘　　要：提出一种基于节点导纳矩阵形式的电压稳定实时分析方法。该方法推导了由节点电压在小扰动下迭代不收敛所引起的电压单调失稳模式,这与实际系统中的电压崩溃事故大都是非振荡形式的单调失稳相符。该方法利用广域测量系统(wide area measure system,WAMS)的同步测量数据,引入PV节点的灵敏度等效导纳来实时修正节点导纳矩阵,能够克服传统静态分析方法不能计及系统动态变化的弊端;并且不需要对系统进行等值计算,有利于提高算法的速度和准确性。所提方法具有原理简单、计算量小的优点,适于互联电网的在线电压稳定监控。以新英格兰39节点系统仿真验证该方法的有效性。A new method of on-line voltage stability analysis based on bus admittance matrix form was proposed, and monotone mode of voltage instability resulted by divergence of voltage iteration was deduced, which coincides with the monotone instability of actual voltage collapse accidents in power system. The local synchronous phase-angle measurements are used in this method to calculate the sensitivity equivalent admittance, which is used to revise node admittance matrix. Thus the voltage stability of each load bus can be identified only by diagonal data of modified admittance matrix. As the features of simple principle and fast speed, the proposed approach is suit for online voltage stability analysis and control of interconnected power grid. Simulations in New-England 39 nodes system demonstrate validity of the method.

关 键 词：电压稳定 节点导纳矩阵 灵敏度 广域测量系统 

分 类 号：TM71[电气工程—电力系统及自动化]