Research on high-proportion distributed photovoltaic access planning method considering voltage over limit risk

Abstract

The current distributed PV access planning method mainly controls the access capacity, ignoring the impact of different access locations on the distribution network operation, which leads to the inability of PV to be fully consumed and generates large disturbances. To improve the utilization efficiency of PV power generation and solve the above-mentioned shortcomings, a high-proportion distributed PV access planning method that considers the risk of voltage crossing limits is studied. After analyzing the changes in distribution network operation characteristics after accessing a high-proportion distributed PV, the voltage crossing risk is estimated by calculating the network current. Multiple optimization objectives including voltage crossing risk are established to build the access planning model. The access planning results are obtained by solving the model with the multi-intelligence algorithm. After the distribution network experiment, the method considering the voltage crossing risk improves the PV consumption by about 18.3%, the connected PV generates less disturbance to the distribution network, and the access point is better.