一种配电网状态估计实用快速算法

Practical Fast Algorithm for State Estimation on Power Distribution Network

为了解决配电网状态估计规模大、求解困难的问题,提出一种配电系统量测区域分解方法,将配电网中各馈线分解成多个量测区域,使得分解后各个区域之间解耦,并且对系统中数量庞大的负荷进行分组合并,进一步降低问题求解难度。针对配电系统中量测特点,构建了基于量测变换和零注入约束的状态估计算法。该算法可以充分利用各种量测信息,计算速度快、收敛性好。算例验证表明,所提出的方法高效可行,满足当前配电系统在线实时应用的要求。

In order to solve problems of large scale of state estimation on power distribution Network and difficult solving,a kind of measuration area decomposition method for power distribution system was proposed which divided feeders in power distribution network into several measuration areas and could realize decoupling of each area. Meanwhile,this method was able to carry on grouping and merging on huge load in the system that might further reduce difficulty in solving problems. In allusion to features of measuration,state estimation algorithm based on measuration transformation and zero injection con-straint was constructed which could fully use various measuration information and was rapid in calculating and of good con-tingency. Example verification indicates that this method was highly effective and feasible to satisfy requirement for online real-time application of present power distribution system.