1Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education (Northeast Electric Power University), Jilin 132012, China;2State Key Laboratory of Advanced Power Transmission Technology (China Electric Power Research Institute), Beijing 102200, China

To address issues such as signal delay, impedance mismatch, and stability challenges at the interfaces of hybrid simulation systems, a power interface modeling method for the hybrid simulation system based on predictive loop active disturbance rejection control (ADRC) is proposed. Firstly, by analyzing the principles and stability conditions of the voltage-type ideal transformer method, it is proposed to applying the ADRC in the real-time estimation and compensation of interactive errors and unmodeled dynamics between the digital and physical sides, thereby improving the anti-interference capability of the hybrid simulation system. Secondly, a Smith predictor is designed to obtain a delay-free system output, which is then fed back into the extended state observer to enhance the control system performance. Then, a control parameter design method is proposed based on the bandwidth-parameter method from the controller perspective. This method designs a control parameter tuning process suitable for digital-analog hybrid simulation system by setting system bandwidth and tracking performance indicators. Finally, the correctness of the theoretical analysis and the effectiveness of the proposed method are verified based on digital simulation and power hardware-in-the-loop experiments.