Alternating-current fault detection method for high-voltage direct-current power transmission
A high-voltage direct current transmission and fault detection technology, applied in the field of power transmission and distribution, can solve the problems of current amplitude, slope, curvature waveform, sacrificing quickness, and voltage output fluctuations.
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[0043] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0044] Such as figure 1 as shown, figure 1 It is a judgment logic diagram for AC fault detection of HVDC transmission; a voltage real-time monitoring device is installed on the commutation bus, and a current real-time monitoring device is installed on each outgoing line of the commutation bus to obtain the three-phase voltage value and Three-phase current value.
[0045] An AC fault detection method for HVDC transmission includes the following:
[0046] Step 1. Obtain the three-phase voltage and three-phase current of the commutation bus respectively;
[0047] Step 2. According to the instantaneous value of the three-phase voltage of the commutation bus and the instantaneous value of the three-phase current of each outgoing line of the commutation bus, respectively obtain the voltage zero-sequence component value of the commutat...
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