This article proposes the partially signed binary voltage control (PSBVC) method for a hybrid modular multilevel converter (MMC) (HMMC), which has a mixture of half-bridge submodules (SMs) (HB-SMs) and full-bridge SMs (FB-SMs). With the proposed PSBVC method, the HMMC can generate a large number of voltage levels with much fewer SMs than the MMC and enhanced MMC (EMMC) by having different voltages for each FB-SM. That is, all HB-SMs have the same voltage and their sum in an arm is the same as the dc-link voltage. On the contrary, the voltages of FB-SM are sequentially decreased by half from HB-SM voltage. As the voltage level becomes more sophisticated, the circulating current decreases effectively because the voltages of HB-SMs are tightly regulated. As the result, the HMMC with the proposed PSBVC method is superior in not only harmonic performance but also circulating current. To verify the effectiveness of the HMMC with the proposed PSBVC method, its controller is firstly designed by the electromagnetic transients program (EMTP). Then, it is experimentally verified with the hardware prototype of HMMC. Finally, the main advantages of HMMC with the proposed PSBVC method are emphasized by comparing it with MMC and EMMC in detail.

中文翻译：

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混合模块化多电平转换器的部分有符号二进制电压控制

本文为混合模块化多电平转换器 (MMC) (HMMC) 提出了部分有符号二进制电压控制 (PSBVC) 方法，该转换器具有半桥子模块 (SM) (HB-SM) 和全桥 SM (FB -短信）。使用所提出的 PSBVC 方法，HMMC 可以通过为每个 FB-SM 设置不同的电压，以比 MMC 和增强型 MMC (EMMC) 少得多的 SM 生成大量电压电平。也就是说，所有 HB-SM 具有相同的电压，并且它们在一个臂中的总和与直流链路电压相同。相反，FB-SM 的电压从 HB-SM 电压依次降低一半。随着电压电平变得更加复杂，由于 HB-SM 的电压受到严格调节，因此循环电流有效降低。作为结果，具有所提出的 PSBVC 方法的 HMMC 不仅在谐波性能方面而且在循环电流方面都具有优越性。为了用所提出的 PSBVC 方法验证 HMMC 的有效性，首先通过电磁瞬态程序 (EMTP) 设计其控制器。然后，用HMMC的硬件原型对其进行了实验验证。最后，通过与 MMC 和 EMMC 的详细比较，强调了 HMMC 与所提出的 PSBVC 方法的主要优点。