基于系统同调性的PMU最优布点

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。

COHERENCY BASED OPTIMAL PLACEMENT OF PMU WITH STABILITY OBSERVABILITY

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.