Method of detecting cascading failure in AC-DC hybrid system
A technology of AC/DC mixed connection and cascading failure, applied in the fault location, measurement power, measurement device and other directions, can solve the problems of cascading failure, commutation failure or even blocking, affecting the transmission capacity of the parallel operation AC channel, etc., and achieves a small amount of calculation. , to ensure the effect of orderly operation
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[0017] The present invention will be further described below in conjunction with accompanying drawing.
[0018] see figure 1 , the method for detecting the cascading failure of the AC / DC hybrid system of the present invention comprises the following steps:
[0019] Step S1, initializing the AC / DC hybrid system;
[0020] Step S2, simulating the disconnection or short circuit of a certain line in the AC / DC hybrid system, or simulating the instability of the generator, so as to set the fault;
[0021] Step S3, performing power flow calculation on the AC / DC hybrid system;
[0022] Step S4, judging whether the power flow is converged, if so, proceed to step S6; if not, proceed to step S5;
[0023] Step S5, increase or decrease partial load, and return to step S3;
[0024] Step S6, check the voltage of each DC commutation busbar in the AC-DC hybrid system, block the DC commutation busbars that are lower than the preset value, and proceed to the next step;
[0025] Step S7, judg...
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