Theoretical Analysis on High Frequency Ferroresonant Overvoltage

The high frequency ferroresonant occurs when a nonlinear inductor is fed from a series capacitor in the neutral insulated system and the neutral solidly grounded system. To address this issue, this paper deduces the mathematical expression of the high frequency ferroresonant and uses mathematical analysis method to solve the nonlinear differential equations based on the system equivalent diagram. The relevant influential factors of the high frequency ferroresonant overvoltage amplitude are derived and the influence of all relevant factors on high frequency ferroresonant overvoltage are analyzed in detail.