A Control Method of dfig System Based on Repeated Sliding Mode
A control method and sliding mode technology, applied in control systems, control generators, vector control systems, etc., can solve the problems that the current distortion and torque ripple cannot be suppressed, and the output current of the DFIG wind power system is difficult to meet the grid-connected regulations.
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[0070] In order to describe the present invention more specifically, the DFIG system control method of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0071] In this embodiment, the parameters of the DFIG power generation system to be controlled are shown in Table 1:
[0072] Table 1
[0073]
[0074] Such as figure 2 As shown, a DFIG system control method based on repeated sliding mode includes the following steps:
[0075] For DFIG machine-side converter 1 control:
[0076] A1. Use the Hall voltage sensor 3 to collect the three-phase stator voltage U of DFIG sa ~ U sc , using the Hall current sensor 4 to collect the three-phase stator current I of DFIG sa ~I sc and the three-phase rotor current I ra ~I rc ; Utilize the photoelectric encoder 5 to detect the rotational speed ωr of DFIG and the rotor position angle θ r .
[0077] Firstly, the three-phase stator voltage U is respectiv...
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