Method for controlling harmonic current of full-power converter for suppressing wind power grid integration and controller
A technology of harmonic current and control method, which is applied in the field of harmonic current control method and controller of full-power converters for wind power grid-connected, and can solve the problem of unfavorable grid-connected harmonic current. Subharmonic reactance cross-coupling effects and other issues
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[0064] The present invention will be further described in detail below in conjunction with specific embodiments.
[0065] Such as Figure 1 to 5 As shown, a method for suppressing the harmonic current of a full-power converter for grid-connected wind power is characterized by including the following steps:
[0066] (1) Collect the three-phase current i of the grid-connected converter ga , I gb , I gc :
[0067] (2) Collect the three-phase voltage u of the power grid ga , U gb , U gc ;
[0068] (3) Three-phase grid voltage signal u ga , U gb , U gc After the static three-phase abc coordinate system is transformed to the static two-phase αβ coordinate axis coordinate system constant power transformation, the voltage e in the αβ axis coordinate system is obtained α , E β ,
[0069] e α e β = 2 3 1 - 1 2 - 1 2 0 3 4 - 3 4 e ga e gb e gc
[0070] Grid voltag...
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