Research on the Reactive Power Adjusting Ability of PV Inverter and Demonstration Application of PV Power Plant on Rapid Reactive Power Regulation

By comparing and analyzing, we obtain the conclusion that photovoltaic (PV) inverter has good reactive power regulation ability as it has similar topology and control strategy with SVG. A typical inverter power generation model of a centralized grid-connected PV power plant is built on the PSCAD/EMTDC platform. The reactive power adjustment ability of the inverter under several specific conditions is analyzed in simulation. The simulation result shows that the dynamic reactive power response time of the inverter is within 30ms and the reactive power capacity is higher than the requirement of the national standard. The reactive power regulation ability of the plant inverter is modified by combining the rapid power regulation technology of the PV power plant and ideal test results are obtained in the on-site test.