A Calculation Method of AC System Contributed Short-Circuit Current During DC Fault in Multi-terminal AC-DC Hybrid Distribution Network
An AC-DC hybrid and AC system technology, applied in the field of AC-DC hybrid distribution network, can solve the problem that the practical calculation method of the contribution of the AC system to the short-circuit current is not proposed, and the method is not suitable for the multi-terminal system.
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[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0037] figure 1 Contribute to the flow chart of the short-circuit current calculation method for the AC system of the present invention. Depend on figure 1 It can be seen that the present invention includes the following steps: Step 101: Aiming at the fault current characteristics of a single converter station and the contribution of the AC system to the fault current after the occurrence of a short-circuit fault between the poles of the DC line, construct a short-circuit fault between the poles of the AC-DC hybrid distribution network After the equivalent circuit; step 102: according to the equivalent circuit obtained in step 101, establish the analytical expression of the AC system contribution short-circuit current in the DC capacitor discharge and AC system feed-in stages; step 103: derive the analytical expression according to the step 10...
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