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Unbalanced voltage compensation method, unbalanced voltage compensator, three-phase converter control method, and controller of three-phase converter
Unbalanced voltage compensation method, unbalanced voltage compensator, three-phase converter control method, and controller of three-phase converter
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机译：不平衡电压补偿方法，不平衡电压补偿器，三相转换器控制方法和三相转换器的控制器
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摘要
In compensating for unbalanced voltages of three-phase AC, instantaneous values of wye-phase voltages 120° out of phase with each other are obtained from line voltages using a centroid vector operation, symmetrical component voltages of three-phase balanced system are obtained from the instantaneous values of wye-phase voltages, a compensation signal to compensate unbalanced voltages of three-phase AC is generated from zero-phase-sequence voltage of symmetrical component voltages is generated, wye-phase voltages 120° out of phase, the unbalanced voltages of which are compensated, are obtained from the compensation signal and the symmetrical component voltages, a control signal of a PWM conversion is generated based on the compensated wye-phase voltage compensated, and the unbalanced voltages of three-phase AC are compensated. The amount of time to compensate the three-phase unbalanced voltages required for detecting an unbalance of voltages and generating a control signal can be shortened.
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