A megawatt wind power converter anti-electromagnetic interference system

Abstract

The invention belongs to the related field of a wind power generation converter, and particularly relates to an anti-electromagnetic interference system of a megawatt-level wind power converter. The anti-electromagnetic interference system comprises a generator rotor, a converter, a main controller and a transformer, wherein the converter is respectively connected with the main controller, the generator rotor and the transformer. The anti-electromagnetic interference system is characterized in that the converter and the main converter controls the starting and the stopping of the converter by handshaking communication; the converter is connected with the generator rotor by a du / dt overvoltage suppressor and a cable; the generator rotor is connected with the transformer; and current generated by rotation of the generator rotor is fed to the transformer by the generator rotor. The anti-electromagnetic interference system has the advantages that the design starts from the idea of system simulation, and according to the working principle of a filter, the most essential influence of the parameters on the overvoltage suppression is found, so that the optimum parameter combination is found out, and the influence of electromagnetic interference on the converter is improved by combining a plurality of means.

Description

technical field [0001] The invention belongs to the related field of wind power converters, and in particular relates to an anti-electromagnetic interference system for megawatt-level wind power converters. Background technique [0002] In recent years, wind power has developed rapidly with the support of national policies, but with the continuous increase of wind power installed capacity, the status of wind power in the power system has changed. When the installed capacity of wind power is small, the impact of its operation on system stability can be ignored; when the installed capacity of wind power becomes larger and its proportion in the system increases year by year, the impact of its operation on system stability will change. cannot be ignored. [0003] The existing doubly-fed wind power converters use high-power power electronic devices, which generate a large amount of du / dt (overpulse voltage) when they are turned on and off quickly, especially the du / dt on the rot...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the above-mentioned problem of strong electromagnetic interference signals in wind power converters, a special anti-electromagnetic interference system for megawatt-level wind power converters is now proposed

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