考虑最大可观测通道数和关键故障线路约束的PMU优化配置研究

针对目前PMU配置模型中考虑的约束难以满足实际需求的问题,提出了一种基于0-1整数规划的PMU配置模型.该模型一方面可以方便地考虑零注入节点的影响,同时结合最大可观测通道数约束;另一方面采取了线路筛选技术,把线路中断后节点电压和线路潮流的越限程度作为筛选指标,获取了关键故障线路集,从而缩小了传统N-1线路校验集合.通过对IEEE-14、30、57、118系统和浙江省电网500 kV（76节点）以及220 kV系统（543节点）的仿真计算,将算例结果和线路N-1条件进行了对比.结果表明,该方法能够有效减少PMU的数目,在提高经济性的同时又保证了系统的可靠性.

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

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.