基于系统同调性的PMU最优布点  

COHERENCY BASED OPTIMAL PLACEMENT OF PMU WITH STABILITY OBSERVABILITY

作　　者：许剑冰[1] 薛禹胜[1] 张启平[2] 陈开庸 励刚[2] 洪宪平 徐泰山[1] 鲍颜红[1] 

机构地区：[1]国电自动化研究院/南瑞集团公司 [2]华东电网公司,上海市200002 [3]上海华东电力咨询有限公司,上海市200002

出　　处：《电力系统自动化》2004年第19期22-26,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(59920037);原国家电力公司资助项目(SP11-2002-0105)。

摘　　要：从电力系统的同调性出发,优化相量测量单元(PMU)的布点,以最少数量的PMU反映系统在各种扰动下的主要动态行为。该方法利用扩展等面积准则(EEAC)稳定性理论中的主导模式概念,识别所有可能出现的暂态功角失稳模式,并据此将所有的发电机节点划分为不同的同调群。在每个群中选择一台发电机安装PMU,以捕捉关键的功角动态信息。同时,利用暂态电压稳定和暂态电压跌落可接受性的概念,识别所有可能出现暂态电压问题的相邻母线的子集。在每个子集中选择一条母线安装PMU,以捕捉关键的电压动态信息。根据该最小PMU集提供的动态信息,不但可以正确地定性判断系统的同步稳定性和电压稳定性,并可通过数据挖掘方法评估其稳定裕度。结合华东电网验证了该方法的有效性。Based on coherency characteristics of rotor angles as well as bus voltages, placement of phasor measurement units (PMU) is optimized. All potentially critical-modes for transient angle stability are identified by extended equal area criterion (EEAC), and then a PMU is assigned to one of the power plants in each critical cluster. All potentially critical bus-clusters for transient voltage stability are identified via assessing transient voltage stability and transient voltage-dip acceptability, and then a PMU is assigned to one bus in each critical bus-cluster. Moreover, the optimal sequence for placing the PMUs is proposed. The effectiveness of the proposed algorithm is verified with numerical simulation on a real power system, and the resultant scheme is being implemented.

关 键 词：PMU布点的优化 同调性 暂态功角稳定 暂态电压稳定 暂态电压跌落可接受性 

分 类 号：TM76[电气工程—电力系统及自动化] TM712