| 引用本文: | 宋平岗,何峰.基于微分平坦理论模块化多电平换流器环流抑制控制方法[J].电力系统保护与控制,2015,43(19):43-48.[点击复制] |
| SONG Pinggang,HE Feng.Differential flatness based method of circulating current suppressing control for modular multilevel converter[J].Power System Protection and Control,2015,43(19):43-48[点击复制] |
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| 摘要: |
| 针对模块化多电平换流器(Modular Multilevel Convert，MMC)三相桥臂相间环流问题，基于微分平坦理论推导出一种环流抑制控制模型。通过分析MMC相间环流的产生本质，根据微分平坦理论的定义，选取系统的输入，输出和中间量，证明了设计出的环流抑制控制器满足微分平坦理论的条件。基于该理论设计的环流抑制控制器，能够大大降低桥臂电流中的环流分量，使其更接近正弦波。最后通过Matlab/Simulink搭建了相应的MMC仿真模型，在未影响MMC外部电压电流的情况下，仿真结果证明了该环流抑制控制模型的有效性，为环流抑制控制器的设计提供了一种新的思路。 |
| 关键词: 模块化多电平换流器 非线性 相间环流 环流抑制控制器 微分平坦 |
| DOI：10.7667/j.issn.1674-3415.2015.19.007 |
| 投稿时间：2014-12-16修订日期：2015-06-15 |
| 基金项目:国家自然科学基金(51367008) |
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| Differential flatness based method of circulating current suppressing control for modular multilevel converter |
| SONG Pinggang,HE Feng |
| (College of Electrical and Electronic Engineering, East China Jiaotong University, Nanchang 330013, China) |
| Abstract: |
| As the interphase circulating current exists in the three-phase bridge arm of modular multilevel converter, the differential flatness theory (DFT) based MMC circulating current suppressing controller is deduced. According to the analysis about the nature of the interphase circulating current and the definition of the DFT, it chooses the input, output and intermediate quantity of the control system, proving that the design of circulating current suppressing controller can meet the conditions of DFT. The newly designed controller could reduce the interphase circulating current in the bridge arm current, and make it closely approximate the sine wave. At last, the MMC model is simulated based on Matlab/Simulink. In the case of no impact on MMC external voltage and current, the result show that the control model is effective, which provides a new idea for the design of circulating current suppressing controller. |
| Key words: modular multilevel converter (MMC) nonlinear interphase circulating current circulating current suppressing controller differential flatness |
