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首页> 外文期刊>Power Electronics, IET >Single-phase current source converter with high reliability and high power density
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Single-phase current source converter with high reliability and high power density

机译：具有高可靠性和高功率密度的单相电流源转换器

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摘要

For single-phase current source converter (SCSC), at least one upper device and one lower device have to be gated on and maintained at any time. Otherwise, an open-circuit of the DC-link current would occur and destroy the devices. In addition, a bulky DC-link inductor is usually required to obtain a smooth DC-link current. To address these issues, this study proposes a novel SCSC with high reliability and high-power density. In the proposed circuit, even all the switches are turned on or turned off simultaneously, neither short-circuit nor open-circuit will happen. The inductance in DC-side is reduced significantly byadopting the active power decoupling technique. First, the operation principle of the proposed converter is introduced in detail. Then, a closed-loop control method is presented to regulate the DC-link current, maintain the DC component of the decoupling capacitor voltage, and achieve sinusoidal grid current. Besides, the parameter design of the circuit and controller is investigated. Moreover, the efficiency comparison between the proposed and other SCSCs is carried out. Finally, the effectiveness of the proposed topology is verified by the experimental results.
机译：对于单相电流源转换器（SCSC），必须在任何时间上设定至少一个上部装置和一个下装置。否则，将发生DC-Link电流的开路和破坏设备。另外，通常需要庞大的DC连杆电感器来获得平滑的DC连杆电流。为了解决这些问题，本研究提出了一种具有高可靠性和高功率密度的新型SCSC。在所提出的电路中，即使所有开关也会同时打开或关闭，既不发生短路也不会发生开路。 DC侧的电感显着减小了有源功率去耦技术。首先，详细介绍所提出的转换器的操作原理。然后，提出了一种闭环控制方法来调节DC-Link电流，维持去耦电容器电压的DC分量，实现正弦栅电流。此外，研究了电路和控制器的参数设计。此外，提出了所提出的SCSC之间的效率比较。最后，通过实验结果验证了所提出的拓扑的有效性。

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