Research on Inverter Side Control of Power Grid Simulator Based on Active Disturbance Rejection and Repetitive Control

Abstract

To track the input voltage waveform quickly and accurately, and sort out waveforms on the power grid simulator, a control strategy is proposed. The first loop use repeated control (RC) and PI Control composite control, and the voltage inner loop is controlled by a first-order linear self-disturbance rejection controller (ADRC). A suitable inverter topology is also designed. To improve the performance of the proposed controller, the bandwidth method is selected to adjust the observer bandwidth. In view of the frequency adaptability of inverters on the inverter side, the output voltage imbalance is suppressed by improving the repetitive control and the tracking accuracy is improved. The simulation results indicate the controller has the ability to track the waveform quickly and accurately. In addition, the waveform jitter is effectively suppressed.