Excitation control method of independent generating system of brushless doubly-fed machine under asymmetric load
A technology of doubly-fed motor and power generation system, which is applied in the direction of generator control circuit, control system, control generator, etc., can solve the problem that the positive sequence component and negative sequence component of PW voltage cannot be controlled at the same time.
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[0082] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0083] In the embodiment of the present invention, such as figure 1 shown, including the following steps:
[0084] (1) Sampling the instantaneous value of PW three-phase voltage u 1a , u 1b and u 1c , using biquad generalized integrator phase-locked loop to calculate the amplitude of positive sequence component of PW voltage and the magnitude of the negative sequence component
[0085] (2) Sampling the instantaneous value of CW three-phase current i 2a i2b and i 2c , calculate the positive sequence d, q components of the CW current in the positive sequence dq coordinate system with An...
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