Integrated Impact of high percentage Distributed Photovoltaic on Power Grid

Abstract

In order to study the impact of high percentage distributed PV grid connection on the distribution network, firstly, the distribution network structure of distributed PV connection is briefly outlined, based on which the possible causes of voltage deviation and network loss of PV grid connection are theoretically deduced. The problem is also analyzed by building IEEE33 node model for different grid connection locations and capacity scenarios. The research results show that in order to cope with the voltage stability problems caused by the high proportion of distributed PV power generation connected to the distribution network, it is necessary to strengthen the control of grid-connected capacity and reasonably select the access location to ensure that the problems of power quality deterioration, line light load and even backward transmission of the distribution network are limited within the specified allowable range.