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

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

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。

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.