Control method of Vienna rectifier under power grid imbalance
A technology of power grid imbalance and control method, which is applied in the direction of electrical components, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problems of output voltage secondary ripple, rectifier input current distortion, etc., and achieve simple control method, beneficial effect
Active Publication Date: 2021-10-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Abstract
The invention relates to a control method of a Vienna rectifier under power grid imbalance, and belongs to the field of electric energy conversion. The method mainly comprises the steps of calculation of a power grid orthogonal signal and a power grid frequency, calculation of a current reference value under an unbalanced power grid, control over a Vienna rectifier under an unbalanced aviation wide frequency conversion power grid, and suppression of input current harmonic waves and output voltage fluctuation of the Vienna rectifier. Aiming at the rectifier, the method provided by the invention provides a new control strategy for the three-phase rectifier due to the fact that the current methods applied to the aviation wide frequency conversion power grid for controlling the rectifier under the three-phase imbalance are few. According to the invention, a three-phase phase-locked loop and power grid positive and negative sequence component calculation are not needed, the control algorithm is simple, the method is suitable for an aviation wide frequency conversion power grid with the frequency changing in the range of 360-800 Hz, and it can be guaranteed that the Vienna rectifier maintains high-power-factor operation and stable direct current output voltage under the working condition that the power grid is unbalanced.
Application Domain
Efficient power electronics conversionAc-dc conversion
Technology Topic
Power gridRectiformer +12
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