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Subharmonic resonance occurrence in power system more frequently. This paper used mathematical analysis method for solving the nonlinear differential equations based on the system equivalent diagram, and deduced the mathematical expression of the subharmonic resonance, derived the relevant affective factors of subharmonic resonance overvoltage amplitude, and analyzed the influence of all relevant...
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...
This paper presents a new technique for transformer current differential protection based on the time difference method. Through comparison to the traditional principles of harmonic restraint differential protection using EMTP simulation, the simulation results show that during the inrush and over-excitation conditions, the new protection technique can guarantee no malfunction; for internal fault...
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