Digital Simulation Analysis of Ferroresonance of Electromagnetic Potential Transformer Based on MATLAB

Through the application of Power System Block-Set and Simulink based on MATLAB software, ferromagnetic resonances of a group of electromagnetic potential transformers in the isolated neutral system are simulated and studied. Two kinds of eliminating resonance methods are analyzed including microcomputer resonance eliminator connected in the tertiary winding and nonlinear resistance between primary neutral point of PT and ground. In the end, some protective measures and suggestions are proposed.