Research on Modeling and Simulation of Ultra-high Voltage Direct Current Transmission System Based on ODE Equation

This article establishes a mathematical model for the AC/DC side of MMC, completes the derivation of four equations for MMC-ODE, and builds the MMC-ODE model on Matlab/Simulink based on the A-side data of a certain DC project. The simulation results prove that the MMC-ODE equation can accurately describe the operating characteristics of the AC/DC side of MMC converter, and has good dynamic response performance and stability performance. Finally, this article proposes a circulation controller in the dq coordinate to achieve good control of circulation, and conducts simulation verification.