Control and monitor method of silicon controlled rectifier converter valve for extreme high voltage direct current power transmission
A thyristor converter valve and ultra-high voltage DC technology, which is applied in the field of thyristor converter valve control and monitoring for ultra-high voltage DC power transmission, can solve the problems of the thyristor being in the conduction state, the failure of protection during the reverse recovery period, and the failure of commutation, etc. The effect of good real-time performance, high reliability and simple pulse coding
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[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0016] refer to figure 1 As shown, the present invention monitors the working state of the converter valve through the thyristor high-potential electronic unit TEU S2. When the state exceeds the set threshold value, the high-potential electronic unit TEU S2 actively controls and protects the thyristor to send a single pulse, and through the high-voltage optical fiber Report the working state to the valve-base electronic equipment cabinet VBE S1 to perform statistics and other operations on the report signal. The high-potential electronic unit TEU S2 monitors the positive overvoltage and negative overvoltage of the converter valve. When the voltage and negative voltage exceed the set threshold, a pulse return signal is sent to the valve base electronic equipment cabinet VBE, and the thyristor is actively controlled and protected by sending a single pulse.
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