| 引用本文: | 林环城,王志新.基于模型预测控制的模块化多电平变流器桥臂能量控制策略[J].电力自动化设备,2018,(4): |
| LIN Huancheng,WANG Zhixin.Arm energy control strategy of modular multilevel converter based on model predictive control[J].Electric Power Automation Equipment,2018,(4): |
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| 摘要: |
| 已有模块化多电平变流器(MMC)控制策略大多采用单一子模块电容电压参考给定的控制方式，存在无法分别控制不同桥臂子模块电容电压等不足。提出一种基于模型预测控制的MMC桥臂能量控制策略，通过引入桥臂能量共模分量和差模分量控制，实现各桥臂子模块电容电压的灵活控制；同时，基于MMC的暂态数学模型设计相电流及环流模型预测控制器，并引入电流误差反馈滚动优化，有效地实现了外部相电流和内部环流的解耦控制，使环流控制器具有能灵活实现环流抑制和环流注入的特性，且对系统参数不敏感。仿真结果验证了所提控制策略的正确性和有效性。 |
| 关键词: 模块化多电平变流器 模型预测控制 环流 桥臂能量 控制策略 |
| DOI：10.16081/j.issn.1006-6047.2018.04.007 |
| 分类号:TM46 |
| 基金项目:国家自然科学基金资助项目(51377105) |
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| Arm energy control strategy of modular multilevel converter based on model predictive control |
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LIN Huancheng, WANG Zhixin
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School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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| Abstract: |
| Existing control strategies of MMC(Modular Multilevel Converter) mostly use given submodule capacitor voltage reference, which can not control the capacitor voltage of different arms separately. An arm energy control strategy for MMC based on model predictive control is proposed, which introduces common-mode and differential-mode component control of the arm energy to realize flexible control of the capacitor voltage of each arm. The model predictive controllers of phase current and circulating current are designed based on the transient mathematical model of MMC and the current error feedback receding horizon optimization is introduced, realizing the decoupling control of external phase current and internal circulating current effectively and making the circulating-current controller realize the characteristics of circulating-current restraining and circulating-current injection, and it is not sensitive to parameters of the system. Simulative results verify the validity and effectiveness of the proposed control strategy. |
| Key words: modular multilevel converter model predictive control circulating current arm energy control strategy |
