张凯,谢源,刘浩,李少朋,贺耀庭.基于准比例谐振双闭环控制的电网模拟器逆变侧设计[J].电测与仪表,2022,59(12):137-143. Zhang Kai,Xie Yuan,Liu Hao,Li Shaopeng,He Yaoting.Design of Inverter Side of Power Grid Simulator Based on Quasi-Proportional Resonant Double Closed Loop Control[J].Electrical Measurement & Instrumentation,2022,59(12):137-143.
基于准比例谐振双闭环控制的电网模拟器逆变侧设计
Design of Inverter Side of Power Grid Simulator Based on Quasi-Proportional Resonant Double Closed Loop Control
In view of the inverter-side control of the grid simulator, the traditional proportional-integral control has problems such as static difference, delay and oscillation for the tracking of a given voltage. It is proposed that both the current inner loop and the voltage outer loop of the grid simulator inverter side be used QPR control. In this paper, a suitable grid simulator structure is selected, a single-phase inverter mathematical model is established, an LC filter is used, and a QPR double closed-loop controller is designed. Compared with traditional proportional-integral control, the simulation verifies that the quasi-proportional resonance controller can effectively improve the tracking ability of the system to the command voltage and the stability of the output voltage. Based on the controller hardware-in-the-loop test (CHIL) technology, a power grid simulator experimental platform was built and tested to verify the feasibility of the control strategy.
