潮流PV-PQ转换的混合互补方法

摘要

潮流PV-PQ转换反映无功调节电压的规律,属于典型的互补问题.文中通过引入互补理论建立了PV-PQ转换潮流的严格混合互补模型,结合现代内点算法与互补松弛成功地求解了该模型.深入剖析PV-PQ转换逻辑,并与互补模型对比校验表明:由于启发式逻辑的缺陷,PV-PQ转换容易导致节点类型错误识别并得到静态电压不稳定解,其数值发散与识别性发散不一定对应系统电压失稳,而互补模型可以弥补其缺陷,提高结果的可靠性.IEEE标准系统和一个实际系统的仿真结果证实了上述结论.%The PV-PQ bus type switching is a typical complementarity problem, which reflects the discipline of voltage control by reactive power in power flow computation. By introducing the complementarity theory, the strict mixed complementarity model for PV-P Q bus type switching is constructed, and it is solved successfully by the modern interior method integrated with a complementarity relaxation method. Analysis on PV-PQ type switching logic and comparison with the complementarity model show that the type switching logic may cause the bus type misidentification and obtain static voltage unstable points. As a resuh, the related numerical and identificate divergence may not correspond to system voltage unstable point. All these issues can be involved in the complementarity model to improve the reliability of the results. The conclusions are verified by simulation of IEEE standard systems and a real system.