Asymmetric fault analysis method for AC/DC compound system
A fault analysis method and DC system technology, applied in the field of asymmetric fault analysis of AC-DC hybrid systems, can solve problems such as time-consuming simulation, inability to perform qualitative analysis, etc. Calculated effect
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[0054] The present invention will be described in further detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.
[0055] Test the method proposed by the present invention and adopt the CIGRE Benchmark HVDC standard model, the model structure diagram is as follows figure 1 shown. The sending end of the CIGRE Benchmark standard model is not connected to the AC power grid, so only the receiving end DC system is modeled in the analysis. Set an asymmetrical fault at the commutation bus at the receiving end: Phase A is grounded through a 15Ω impedance. The equivalent value of the fault model containing only the receiving end is as follows figure 2 shown.
[0056] First, according to figure 1 For the CIGRE Benchmark model parameters provided, follow the sequence component method and impedance simulation method described in step...
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