REI等值技术在多区域无功优化计算中的应用

Research on Application of REI Equivalent Technique into Multi-Area Reactive Power Optimization Computing

提出将REI等值技术应用于求解多区域电力系统的无功优化问题,对系统各个分区的外部网络进行REI等值化简,应用非线性原对偶内点法独立进行各个分区的无功优化计算。并对REI节点归并方案、相角传递、等值网络初值计算、内层迭代计算、外层协调计算与REI等值网络修正等关键问题提出了具体的解决办法。以IEEE 39节点和某538节点实际系统作为算例,通过与集中优化方法进行比较,验证了所提方法的有效性,并分析了三种REI节点归并方案对分解协调优化计算的影响。

This paper presents a method of applying riadial equivalent independent（REI） equivalent technology to solve reactive-power optimization problem in multi-area power system.The external systems of each area are simplified by REI equivalent,and every area implements reactive-power optimization calculation by using nonlinear primal-dual interior-point algorithm independently.The specific methods of solving the key problems which include merger scheme of REI buses,phase angles transfer,equivalent network initial parameters calculation,inner iteration calculation,outer coordination calculation and REI equivalent network correction are given.Finally testing results on IEEE 39-bus system and a 538-bus practical system are used to validate the correctness and effectiveness of the proposed algorithm in comparison with the centralized optimization method,and the influences of the three REI buses merger schemes to decomposition and coordination algorithm are analyzed.