Study on the accommodating capability of large-capacity grid-connected photovoltaic generation system

The accommodating capability of large-capacity grid-connected photovoltaic generation system is the main factor restricting the development of photovoltaic industry. With the increasing installed capacity of PV generation, it's stochastic and volatility characteristics have great influence on the power demand-supply balance, power system security and power quality. Based on PSASP, this article establishes the simulation model for the large-capacity grid-connected PV generation system. Through the location and the penetration capacity, the accommodating capability of PV generation is analyzed and quantified. Combine the static and transient stability constraints to calculate the allowed penetration level of PV generation. Then this article selects safety and economic evaluation index to evaluate the accessing locations. Finally, the restriction factors for the accommodating capability of grid-connected PV generation system and recommendations to improve the accommodating capability are summarized through the result.