Topology Optimization of Regional Power Grid Under Large-Scale Access of Distributed Photovoltaic Power Generation

Abstract

In order to avoid the impact of large-scale access of distributed photovoltaic power generation on regional power grid and minimize power grid line loss, a regional power grid topology optimization method under large-scale access of distributed photovoltaic power generation is proposed. Obtain the factors related to the line loss consumption of regional power grid and the access location and capacity of large-scale distributed photovoltaic power generation, as well as the power grid network structure and load. Take the minimum bus loss after large-scale access to distributed photovoltaic power generation as the objective function, and take the continuity, network structure, line relationship, node voltage, etc. as constraints, build the topology model of low-voltage power grid, Using k-means clustering algorithm, the power supply range of regional power grid after large-scale access of distributed photovoltaic power generation is divided into several regions. In each divided small region, KPSO algorithm is used to optimize the network topology, so as to realize the topology optimization of the whole regional power grid. The experimental results show that when the number of clustering centers is 4, the clustering effect of this method is the best and can effectively reduce the power supply line loss.