Voltage stability analyzing method and device based on short circuit capacity
A technology for short-circuit capacity and voltage stability, which is applied in the field of voltage stability analysis methods and devices based on short-circuit capacity, can solve problems such as the incompatibility of load-increasing methods of the whole network, and achieve good popularization and application value and prospects.
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[0035] A voltage stability analysis method and device based on short-circuit capacity, the details are as follows:
[0036] First define the minimum short-circuit capacity for load bus voltage stability, based on the formula:
[0037]
[0038] in: The minimum short-circuit capacity to maintain voltage stability for the load bus, is the apparent power of the load, , , are the load active power and reactive power, respectively, is the load power factor, , is the Thevenin equivalent potential on the system side, and are the equivalent resistance and reactance of the distribution network respectively; the derivation process of the formula is as follows:
[0039] A. According to the Thevenin equivalent circuit of load nodes, the relationship between load bus voltage and short-circuit capacity is deduced by analytical method. Extending the network of voltage stability analysis from the transmission network to the distribution network, the Thevenin equivalent...
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