Analysis of Pt Ferroresonance based on Excitation Characteristic and Self-Excitation Mechanism

PT ferroresonance occurred frequently in distribution network, which seriously threatened the safety of personnel and equipment of substation, and seriously affected the power supply reliability of distribution network. In order to reveal the real cause of PT ferro resonance, to propose the solutions. In order to solve the problem of PT resonance and provide theoretical basis for PT resonance prevention and control, this paper carried out the analysis of PT resonance mechanism, PT excitation characteristics and PT frequency division resonance self-mechanism.