| 引用本文: | 程启明,谢怡群,马信乔,江畅,赵淼圳.模块化多电平矩阵变换器的平坦控制策略[J].电力自动化设备,2022,42(1): |
| CHENG Qiming,XIE Yiqun,MA Xinqiao,JIANG Chang,ZHAO Miaozhen.Flatness-based control strategy of modular multilevel matrix converter[J].Electric Power Automation Equipment,2022,42(1): |
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| 摘要: |
| 模块化多电平矩阵变换器(M3C)能实现三相交流-交流的变换，其突出优势是易于模块化、可靠性高、谐波含量低等，可用于高压大容量变频调速系统。针对传统PI控制稳定速度慢、易产生超调、动态性能差等缺陷，基于微分平坦理论推导出适用于M3C的非线性平坦控制策略，并通过李雅普诺夫方法证明了平坦控制系统的稳定性。平坦控制具有响应快速、无超调、跟踪无静差、动态性能高等优点，能极大地改善M3C输入、输出侧电流的控制效果，且在输入侧频率、输出侧负载变化等运行工况下，平坦控制策略依旧能保持极低的系统冲击量，整体控制效果较好。最后通过MATLAB/Simulink仿真平台对不同工况进行仿真，结果验证了平坦控制策略的正确性和优越性。 |
| 关键词: 模块化多电平矩阵变换器 平坦控制 PI控制 频率变化 负载变化 |
| DOI：10.16081/j.epae.202109001 |
| 分类号:TM46 |
| 基金项目:国家自然科学基金资助项目(61905139)；上海市电站自动化技术重点实验室项目(13Z2273800) |
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| Flatness-based control strategy of modular multilevel matrix converter |
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CHENG Qiming, XIE Yiqun, MA Xinqiao, JIANG Chang, ZHAO Miaozhen
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Shanghai Key Laboratory of Power Station Automation Technology, School of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
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| Abstract: |
| The M3C(Modular Multilevel Matrix Converter) can realize three-phase AC-AC transformation, and has the outstanding advantages of easy modularization, high reliability, low harmonic content, etc.,which can be used in high-voltage and large-capacity variable-frequency speed control systems. Aiming at the shortcomings of traditional PI control, such as slow steady speed, easy overshoot and poor dynamic performance, etc.,a nonlinear flatness-based control strategy suitable for M3C is derived based on the differential flatness theory, and the stability of the flatness-based control system is proved by Lyapunov method. The flatness-based control has the advantages of fast response, no overshoot, no static error tracking and high dynamic performance, etc.,which can greatly improve the control effect of M3C input-side and output-side currents. Under conditions of the input-side frequency changes and output-side load changes, the flatness-based control strategy can maintain the extremely low system impact, and has good overall control effect. At last, the correctness and superiority of the proposed flatness-based control method are verified by MATLAB/Simulink simulation under different working conditions. |
| Key words: modular multilevel matrix converter flatness-based control PI control frequency changes load changes |
