混合变压器中模块化多电平变换器的内部能量平衡控制

IF 5 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Rui Wang;Maurice G. L. Roes;Henk Huisman;Cornelis G.E. Wijnands
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引用次数: 0

摘要

混合变压器可以在电网中提供电压和电流补偿。HTs包括一个线频变压器和一个额定部分变压器功率的转换器。本文主要研究了模块化多电平变换器(MMC)的内部能量平衡过程。MMC的输出电压具有等频率和等相角,但在此应用中具有不同的幅值。本文指出,当采用传统的MMC内部能量平衡方法时,这两个特性会导致稳态控制误差和变增益。在本文中,开发了一种针对MMC的定制控制方案来解决这些问题。理论分析通过缩小模型的测试得到了验证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Internal Energy Balancing Control of a Modular Multilevel Converter as Part of a Hybrid Transformer
Hybrid transformers (HTs) can provide voltage and current compensation in the utility grid. HTs include a line-frequency transformer and a converter rated for partial transformer power. This paper focuses on the internal energy balancing process of a modular multilevel converter (MMC) as part of an HT. The output voltages of the MMC have equal frequency and equal phase angles, but different amplitudes in this application. In this paper it is shown that these two features result in steady-state control errors and variable control loop gains when a conventional MMC internal energy balancing method is applied. In this article, a customized control scheme for the MMC is developed that solves these problems. The theoretical analysis is validated through tests on a scaled-down prototype.
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CiteScore
8.60
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审稿时长
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