Investigation of optimal PMU placement considering limited number of channels constraints and critical line constraints

FAN Hai-feng1， XV Kai1， JIANG Quan-yuan1， SONG Jun-ying2，CHEN Yue-hui2， ZHANG Wen-lei2
（1. College of Electrical Engineering， Zhejiang University， Hangzhou 310027， China； 2. Hunan Electric Power Company， Changsha 410007，China）

Abstract： Aiming at the problem of the constraints involved in the configuration of phasor measurement unit （PMU） in the previous work failing to meet the engineering requirements，a placement model based 0-1 integer programming was investigated. In this model，maximum observable channel constraint and zero injection were considered. Adopting the degree of bus voltage and line power flow constraints violations in the post-contingency as filtering index，the set of key contingencies can be obtained by critical line screening technique. Thus the line set of traditional N-1 checking was narrowed. Numerical simulation was respectively conducted on IEEE 14-bus，30-bus，57-bus，118-bus system，Zhejiang province power grid 500 kV（76-bus）and Zhejiang power grid 220 kV system （543-bus）. Comparing with the N-1 condition （line outages），the result indicate that the proposed method reduces effectively the number of PMU configuration，and improves the reliability and economic efficiency of the system.
Key words： 0-1 integer program; phasor measurement unit（PMU）； limited number of channels； line screening technique