一种直流侧带混合谐波抑制电路的24脉波整流器

常规12脉波整流器会对电网造成大量谐波污染。为同时提高整流器交、直流侧电能质量，提出了一种直流侧带混合谐波抑制电路(Hybrid Harmonic Suppression Circuit, HHSC)的24脉波整流器。所提整流器由常规12脉波整流器、抽头变换器(Tapped Inter-Phase Converter, TIPC)和补偿电路(Compensation Circuit, CC)组成。TIPC的输出端与负载串联，直接调制整流桥的输出电流和电压。CC与负载并联，间接调制整流桥的输出电流，然后根据交、直流两侧电流关系和直流侧电压关系，最终使整流器输入电流接近正弦波，输出电压由12脉波倍增至24脉波。该方法仅需小容量(仅为输出功率的2.65%)的HHSC即可有效降低输入电流谐波和输出电压纹波，具有高谐波抑制性能、低谐波抑制代价等优点。在Matlab/Simulink中搭建仿真模型，验证了所提方法的正确性和有效性。

A 24-pulse rectifier with hybrid harmonic suppression circuit on the DC side

The conventional 12-pulse rectifier causes a lot of harmonic pollution in the grid. To improve the power quality of both AC and DC sides of the rectifier, a 24-pulse rectifier with hybrid harmonic suppression circuit (HHSC) on the DC side is proposed. The proposed rectifier consists of a conventional 12-pulse rectifier, an active-tapped inter-phase reactor (AT-IPR) and a compensation circuit (CC). The output side of the TIPC is connected in series with the load to directly modulate the output current and output voltage of the rectifier bridge; the CC is connected in parallel with the load to indirectly modulate the output current of the rectifier bridge, and then according to the current relationship between the AC and DC sides and the voltage relationship on the DC side, the input line current of rectifier is close to the sinusoidal current and output voltage is doubled from 12 to 24 pulses. This method only needs a small-capacity HHSC (only 2.65% of output power) to reduce input line current harmonics and output voltage ripple effectively, and it has the advantages of high harmonic suppression performance and low harmonic suppression cost. The simulation model of the rectifier system is built in Matlab/Simulink to verify the correctness and effectiveness of the proposed method.This work is supported by the National Natural Science Foundation of China (No. 51767013 and No. 52067013).