Decoupling and delayed compensation method for complex vector PI controller of grid-connected converter
A delay compensation and controller technology, which is applied in the direction of converting irreversible DC power input to AC power output, output power conversion devices, electrical components, etc., can solve the influence of feedback decoupling, affect current loop control performance, feedback Inaccurate decoupling items, etc., to achieve the effect of increasing the phase angle margin and broadening the scope of use
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[0023] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.
[0024] The method for decoupling and delay compensation of the complex vector PI controller of the grid-connected converter according to the present invention specifically includes the following steps:
[0025] (1) For the three-phase current i on the grid side of the grid-connected converter a , i b , i c Sampling, through the coordinate transformation (abc / dq) of the three-phase stationary coordinate system to the two-phase rotating coordinate system, the actual current components i of the d-axis and q-axis are obtained d , i q ;
[0026] (2) The current components i are given to the d-axis and the q-axis respectively d * , i q * with the d-axis and q-axis actual current components i d , i q do the difference, and write it in vector form (u dq =u d +ju q ), as the input of the current controller;
[0027] (3) Aft...
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