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überspannungsschutzschaltung a in a hochspannungsstromrichteranlage operated thyristor - stromrichterventil
überspannungsschutzschaltung a in a hochspannungsstromrichteranlage operated thyristor - stromrichterventil
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机译:高压变流器系统可控硅换流阀中的过压保护电路a
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摘要
A high-power main thyristor is protected from forward voltage breakover by connecting in parallel relationship therewith an improved overvoltage responsive trigger scheme comprising at least one PNPN semiconductor element and a series L-C circuit. The PNPN element is connected between the anode and the gate of the main thyristor, and the L-C circuit is connected between the gate and the cathode. The element is selected to turn on in a voltage breakover mode when the forward bias voltage on the main thyristor attains a predetermined magnitude which is lower than the breakover level of the thyristor, whereupon the latter is triggered by a sharp gate punch.
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