Power grid voltage stability judgment method under multi-circuit direct-current simultaneous fault
A voltage stability and simultaneous fault technology, applied in the direction of AC network voltage adjustment, fault location, power transmission AC network, etc., can solve the problem of poor accuracy of voltage stability judgment, achieve intuitive and accurate judgment, high precision, and improve power grid The effect of delivered power quality
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[0039] The technical solutions and technical effects of the present invention will be further described in detail below in conjunction with the accompanying drawings of the present invention.
[0040] Please see figure 1 , in a specific implementation manner, a method for judging grid voltage stability under simultaneous multi-circuit DC faults, comprising the following steps:
[0041] Acquire fault characterization data of multi-circuit DC grid;
[0042] According to the fault characterization data, calculate the voltage margin coefficient A u , AC side reactive power influence coefficient A Q And the voltage recovery ability coefficient A ω ;
[0043] According to the voltage margin factor A u , AC side reactive power influence coefficient A Q , Voltage recovery ability coefficient A ω , through formula (I), calculate the comprehensive evaluation coefficient A of voltage stability:
[0044]
[0045] According to the comprehensive evaluation coefficient A of voltag...
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