Theoretical Analysis on Subharmonic Resonance Overvoltage

With the continue increases in power system voltage level, more and more complex wiring has resulted in the more frequently occurrence of the subharmonic resonance. To address this issue, this paper deduces the mathematical expression of the subharmonic resonance and uses mathematical analysis method to solve the nonlinear differential equations based on the system equivalent diagram. The relevant influential factors of the subharmonic resonance overvoltage amplitude are derived and the influence of all relevant factors on subharmonic resonance overvoltage are analyzed in detail.