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In this paper, the transient over-voltage (TOV) online monitoring technology based on the 500kV capacitive voltage transformer (CVT) is introduced, including an voltage divider formed by the 500kV CVTs within an unit C3 (the low-voltage capacitor) and the development of an intelligent TOV monitoring system. Based on this monitoring system, some recorded typical TOV waveshapes are displayed and analyzed,...
A high step-up conversion-ratio converter with soft switching is presented in this paper. By using both coupled inductors and isolated transformer, high voltage gain can be easily achieved without extremely high duty ratio. To deal with switching losses, the active clamping circuit is adopted to achieve the zero-voltage-switching turn-on feature for power switches and to absorb the energy stored in...
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