Impact of PV Access on Distribution Network Node Voltage

In order to cope with the shortage of traditional energy and the environmental problems brought by it, the proportion of renewable energy represented by photovoltaic has gradually increased in recent years. However, due to its particularity, photovoltaic is greatly affected by the environment, and its output power has randomness, volatility and uncertainty. A large number of photovoltaic connected to the grid will impact the voltage of each node of the distribution network, causing voltage flicker or fluctuation. Therefore, it is necessary to study the voltage distribution of photovoltaic nodes after grid connection. In this paper, the feeder model of distribution network is established first, and the influence law of grid-connected position and grid-connected capacity on the voltage of distribution network nodes is studied respectively in the case of single photovoltaic and multi-photovoltaic grid-connected. Secondly, a simulation model was built by Opendss to verify the above rules, and the relationship between environmental factors and voltage of each node was analyzed.