面向配网变压器群集的负载均衡优化方法研究

Research on Load Balancing Optimization Method for Distribution Transformer Cluster in Distribution Grid

为解决配电网中变压器的负载率存在较大差异导致的配电网网损增大的问题,提出了一种在1个优化周期内而不是1个时间断面上开展运行优化的负载时空均衡优化方法。以开关设备的开闭状态为优化变量,以变压器群集的有功损耗最小为目标函数,确定配电网在优化周期内的重构方案。在网络拓扑给定的条件下,通过灵活调整分布式电源的无功出力和变压器分接头优化配变群集的节点电压进行仿真,仿真结果表明本文所提方法可以有效降低配变群集的网损,提高节点电压质量。

To solve the problem of increasing network loss of distribution network caused by the big difference in the load factor of transformers in the distribution network,a load space-time balancing optimization method is proposed,which carries out operation optimization during an optimization cycle instead of a time section.First,the on-off states of the switchgear are taken as the optimization variable and the minimum active power loss of the transformer cluster as the objective function,thus determining the reconstruction plan for the distribution network during the optimization cycle.Then,under a given network topology,the reactive output from the distributed generation and the tap of the transformer are flexibly adjusted to optimize the nodal voltage of the transformer cluster.Finally,simulation results show that the proposed method can effectively reduce the network loss of the distribution transformer cluster and improve the nodal voltage quality.