Chopper protection-based dual-fed wind turbine short circuit current calculation method
A technology of short-circuit current and calculation method, which is applied in the direction of only measuring current, measuring current/voltage, measuring electricity, etc., and can solve problems such as unsatisfactory calculation and analysis
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[0060] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.
[0061] Such as figure 1As shown, a method for calculating the short-circuit current of a doubly-fed fan based on Chopper protection includes the following steps:
[0062] S1: Use the memory circuit to measure the stator voltage before and after the fault and the initial value of the stator current before the fault;
[0063] S2: Set the number of iterations K=0;
[0064] S3: Obtain ...
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