Impact of Fault Ride-through Characteristics of Large-scale Distributed Photovoltaic Integration on Voltage in Receiving-end Grid

With the rapid development photovoltaic industry in China, the installed capacity of distributed photovoltaics has been expanding. When the distributed network fails, due to the different fault ride-through strategies and parameters adopted by different companies and series of inverters, the photovoltaic power supplies show different output characteristics during the fault. This paper establishes a fault ride-through mathematical model of photovoltaic (PV) power generation system. Based on the model, the output adaptability of the PV generation is analyzed under different voltage operation conditions. Furthermore, the influence of the voltage of the photovoltaic access point is studied when the fault occurs in the distributed network. The simulation is carried on the IEEE 39-bus system. The results show that the fault ride-through model of PV can achieve secure ride through when the distributed network fails, the effectiveness of the model is verified by simulation. In addition, the voltage variation of the receiving network is within the allowable range during the fault.