Review on Distributed Photovoltaic Carrying Capacity Optimisation Algorithms for Distribution Networks

The large-scale distributed PV access to the distribution network will lead to normal and non-normalised risks in the distribution network, including node voltage overruns, transformer reverse heavy overloads, power quality degradation, etc., so the carrying capacity of the distribution network for distributed PV is limited. The purpose of this paper is to study the carrying capacity of distribution grid for distributed PV and optimization methods. Firstly, considering the uncertainty brought by the large-scale access of high proportion of distributed PV to the distribution network and the correlation between PV output and load, the carrying capacity of distributed PV to the distribution network is analyzed from five aspects, namely, return current, thermal stability, short-circuit current, voltage deviation, and harmonics; and then the optimization methods for the carrying capacity of distributed PV to the distribution network are considered from the source, network, load, and storage.