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提出了一种用于补偿不对称负荷产生的负序、零序分量并调整负荷母线电压，且适用于三根三线制和三相四线制系统的新型无功补偿器。该补偿器由用于补偿负序分量并调整负荷母线电压的三相电压型逆变器和用于补偿零序分五的单相逆变器组成。采用基于d－q变换的瞬时值逆变器输出电压合成方法和SPWM调制方式来实现装置的快速响应。
A new type of reactive power compensator is proposed for compensating the negative sequence and zero sequence components generated by asymmetric load and adjusting the load bus voltage, which is suitable for three three-wire and three-phase four-wire systems. The compensator consists of a three-phase voltage-source inverter for compensating the negative sequence component and adjusting the load bus voltage and a single-phase inverter for compensating zero-sequence five. The instantaneous inverter output voltage synthesis method based on d-q transform and the SPWM modulation method are adopted to realize the fast response of the device.