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首页> 外文期刊>Power Electronics, IET >Circulation suppression of synchronous/interleaving paralleled 400 Hz three-phase four-leg inverter based on third harmonics injection
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Circulation suppression of synchronous/interleaving paralleled 400 Hz three-phase four-leg inverter based on third harmonics injection

机译：基于三次谐波注入的同步/交织并联400 Hz三相四脚逆变器的循环抑制

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摘要

In this study, the third harmonic injection method based on analogue circuit is applied in the interleaving parallel three-phase four-leg (3P4L) inverter, the adverse effects of injected signals on the circulating current are found, and the corresponding control strategy solution is proposed. At the beginning of this study, by using the large-signal model of leg, it is proved that four legs can be decoupled, on the basis of this conclusion, the current sharing control strategy based on dual-loop scheme and third harmonic injection can be applied in paralleled 3P4L inverter, however, peak value of circulating current is increased by zero-sequence component which is caused by injected signals. Therefore, output impedance analysis method is applied, and the control strategy including zero-sequence component feedforward loop is proposed, which can be implemented with analogue circuit, and is suitable for the 400 Hz synchronous/interleaving paralleled inverter systems. Finally, the effectiveness of the control strategy is verified by simulation and experiment.
机译：本研究将基于模拟电路的三次谐波注入方法应用于交错式并联三相四桥臂（3P4L）逆变器中，发现注入信号对循环电流的不利影响，并提出了相应的控制策略解决方案。建议。在本研究开始时，通过使用支路的大信号模型，证明可以将四个支路解耦，在此结论的基础上，基于双回路方案和三次谐波注入的电流共享控制策略可以如果将其应用于并联3P4L逆变器中，则循环电流的峰值会因注入信号引起的零序分量而增加。因此，应用输出阻抗分析方法，提出了一种包括零序分量前馈环路的控制策略，该控制策略可以通过模拟电路实现，适用于400 Hz同步/交织并联逆变器系统。最后，通过仿真和实验验证了该控制策略的有效性。

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