基于Bender’s分解的含DG配电系统网络重构

Bender's Decomposition Based Reconfiguration for Distribution Network with Distributed Generation

提出了一种含分布式电源(DG)的配电系统网络重构算法,用于在配电网出现故障时,由DG构成孤岛系统以实现关键负荷的不间断供电,同时保证这一过程中整个配电系统网损最小。基于Bender’s分解技术,该优化过程被分解为容量和重构2个问题:容量问题用于解决DG给定时孤岛系统最优供电容量的确定;重构问题用于在孤岛确定后对整个系统网损进行优化。重构问题的开关—网损相关因子反馈到容量问题,实现整个网络重构方案的优化。由IEEE33节点系统和PG&E69节点系统验证了所述方法的正确性。

A reconfiguration method for distribution network with distributed generation （DG） is presented, which uses DG island to guarantee the power supply for crucial customers once fault occurs in a distribution network, while minimizing the system loss at the same time. With Bender＇s decomposition method, the optimal procedure is decomposed into two phases, namely, the capacity optimization and network reconfiguration. The former is used to determine the optimal power supply of DG island while the latter to provide an optimal reconfiguration scheme with less power loss. The two phases are integrated to achieve the final optimal scheme by feeding the sensitivity of power loss versus switches in the reconfiguration phase to the capacity optimization phase with the Bender cut. Tests on the IEEE 33-bus system and PG＆E 69-bus system validate the proposed method.