EMT Modeling Method for VSC-HVDC Suitable for High-Efficiency Simulation

The VSC-HVDC engineering is gradually being enhanced in the power grid. The electromagnetic transient model of the VSC-HVDC engineering faces contradictions between model accuracy and computational efficiency due to the numerous power electronic switching devices in the primary system, the complexity of control logic, and the strong internal coupling of the system. This paper is not target a specific VSC-HVDC engineering but proposes a generalized modeling method suitable for efficient parallel simulation of VSC-HVDC engineering from three aspects: the primary system, control and protection system, and signal interaction. The VSC-HVDC engineering model constructed based on this method supports automatic decoupling and parallel simulation and meets the needs for bulk fault calculation. In order to verify the executability, accuracy, and effectiveness of the method, this paper utilizes the electromagnetic transient simulation software ADPSS to construct an electromagnetic transient model of the Zhangbei VSC-MTDC engineering that accurately reflects the characteristics of the actual engineering. By comparing the digital simulation results with the results of the hardware-in-the-loop simulation, the accuracy of the model is validated. The paper conducts parallel simulation of the mode, and analyzes the acceleration effect of the model based on the supercomputing center of the State Grid Simulation Center of the China Electric Power Research Institute. The paper carries out batch fault simulation, ensuring the safe and stable operation of the Zhangbei VSC-MTDC engineering.