Research on Capacity of Distributed Photovoltaic Connected to Distribution Network Considering Voltage Constraint

In order to reasonably evaluate the capacity of distributed photovoltaic (PV) access to the distribution network and prevent voltage deviation from exceeding the limit caused by a large number of PV connected to the distribution network, this paper analyzes the relationship between the capacity of PV connected to the distribution network and the distance to the grid, puts forward the concept of equivalent power distance, and establishes the capacity evaluation model of photovoltaic access to distribution network. For 10kV transmission lines, the access capacity of different types of conductors is given. The results show that the distribution network does not produce unacceptable voltage deviation if only the equivalent power distance meets the requirements, when the distributed photovoltaic generation is connected to the distribution network.