Detection method of real-time voltage vectors in energy feedback unit
A real-time voltage and energy feedback technology, applied in the direction of measuring electrical variables, measuring current/voltage, measuring devices, etc., can solve problems such as control influence, inverter overcurrent, phase and amplitude instability, etc., and achieve strong suppression ability Effect
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[0026] The present invention will be further described below in conjunction with the drawings.
[0027] Such as Figure 2~4 As shown, the real-time voltage vector detection method in the energy feedback unit includes
[0028] 1) Sampling the three-phase AC voltage U of the grid abc ;
[0029] 2) To U abc Carry out CLARK transformation to get U in the two-phase stationary coordinate system αβ ;
[0030] 3) To U αβ Carry out the PARK transformation of the positive initial θ angle to obtain the positive sequence voltage work component U in the rotating coordinate system d +, positive sequence reactive component U q +, at the same time U αβ Perform the PARK transformation of the negative initial θ angle to obtain the negative sequence voltage work component U in the rotating coordinate system d -, negative sequence reactive component U q -;
[0031] 4) Respectively to U d +, U q +, U d -, U q -Perform a notch of twice the initial ω to remove the AC quantity of the positive and negative s...
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