电力系统电磁暂态仿真中异步电动机的机-网解耦模型OA北大核心CSTPCD

In the domain of electromagnetic transients(EMT)simulation for power systems,induction motors are commonly used to represent dynamic load models.However,due to the vast number of induction motors and the limitations of motor-network interfacing methods,conventional induction motor models face challenges in balancing efficiency and numerical stability simultaneously.To address this issue,this paper presents an Induction Motor Load Decoupling(IMLD)model for power systems EMT simulation.This model integrates the equivalent circuit of induction motors with LC transmission line delay,forming a naturally delayed motor-network decoupling interface.As a result,the iterative solutions of the induction motor are decoupled from the external network,eliminating the need for simultaneously solutions with the external network.By solving the equivalent circuit equation and configuring the model parameters based on the active and reactive power of the load bus,the simulation results are matched with the power of the load buses given by the power flow solution.Test case results show that the proposed IMLD model effectively reduces the number of network equation iterations while maintaining high accuracy,simulation efficiency,and good numerical stability.