Abstract：More and more distributed photovoltaic power generation systems are connected to the distribution network, which changes the traditional single flow of power flow in the distribution network. It is possible that the grid-connected voltage will be lead to voltage rise or even exceed limit, affecting the local power quality and photovoltaic penetration. This paper analyzes the mechanism of overvoltage caused by photovoltaic grid connection from the perspective of power transmission theory. The traditional reactive power regulation strategy is improved to avoid unnecessary reactive power flow in the circuit. A more convenient and adaptive method for determining active power limits is presented. The voltage control strategy of photovoltaic power generation based on active power and reactive power control is studied. The electromagnetic transient simulation model of distributed photovoltaic grid-connected system is built in PSCAD/EMTDC. The simulation results verify the effectiveness and economy of the proposed voltage regulation strategy.
石宪, 薛毓强, 曾静岚. 基于有功-无功控制的光伏并网点电压调节方案[J]. 电气技术, 2019, 20(3): 50-56.
Shi Xian, Xue Yuqiang, Zeng Jinglan. Voltage regulation strategies based on power control for grid-connected photovoltaic at point of common coupling. Electrical Engineering, 2019, 20(3): 50-56.
2019, Vol. 20 
