Time-domain fault location method of multibranch direct current line in multiterminal direct current power transmission system
A technology of direct current transmission system, direct current line, applied in the direction of fault location etc.
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[0036] Attached below figure 1 And attached figure 2 The present invention is further described in detail.
[0037] see figure 1 and figure 2 As shown, the DC line is generally long, and the distribution parameter characteristics are obvious. The method of the present invention is based on the distributed parameter model, and according to the branch point boundary conditions, the faulty branch is selected by calculating the voltage of the branch point; for the faulty branch, the three-terminal line is converted by calculating the voltage and current distribution along the direct current transmission line The two ends of the line are formed, and the voltage distribution along the line is calculated from the electrical quantities at both ends of the fault branch, and the voltage calculated according to the fault point is always equal to realize fault location.
[0038] The method of the present invention is based on the distribution parameter model of the direct current tr...
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