1.Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education;(Shanghai Jiao Tong University)， Shanghai 200240， China;2.State Grid Shanghai Municipal Electric Power Company， Shanghai 200122， China
This work is supported by Science and Technology Project of State Grid Shanghai Municipal Electric Power Company （No. 52097018000D） and Shanghai Sailing Program （No. 19YF1423500).
In order to accurately simulate the dynamics of large-scale AC/DC systems and interactions between individual components, a simulation method with high precision and efficiency is highly required. A multi-domain simulation method for large-scale AC/DC systems based on time-frequency coordination transform is proposed. In this method, DC systems are partitioned into the phasor-shift sub-systems, which are presented by their phasor-shift models based on the time-frequency coordination transform. This method can adopt large time-step to improve the efficiency while the accuracy is guaranteed. Further, a multi-domain interface model between phasor-shift sub-systems and electromagnetic sub-systems，which is also called interface transmission line model， is optimally designed. The interface model can reflect both instantaneous and wide-band phasor waveforms simultaneously. Finally, an actual AC/DC system integrating four-terminal flexible DC system in China has validated the effectiveness of the proposed method.
SONG Zhao,SHU Dewu,YAN Zheng,et al.Multi-domain Simulation Method for Large-scale AC/DC Systems Based on Time-Frequency Coordination Transform[J].Automation of Electric Power Systems,2020,44(5):130-137.DOI:10.7500/AEPS20190805005Copy