| 双向MMC型DC-DC变换器的控制策略研究 |
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| 引用本文： | 王坚,王毅,付超. 双向MMC型DC-DC变换器的控制策略研究[J]. 现代电力, 2019, 36(3): 73-79 |
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| 作者姓名： | 王坚 王毅 付超 |
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| 作者单位： | 新能源电力系统国家重点实验室(华北电力大学),河北保定 071003 |
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| 基金项目： | 国家重点研发计划资助项目(2016YFB0900203) |
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| 摘 要： | 双向MMC型DC-DC变换器由于其具有电气隔离、灵活控制直流功率、适用于高压大功率场合等诸多优势,目前得到了广泛的关注。本文提出了一种适用于双向MMC型DC-DC变换器的控制策略,该控制策略系统级采用定交直流电压控制,实现对变换器有功和无功功率的控制;阀组控制采用先生成触发脉冲,然后排序均压的控制方式,实现变换器桥臂能量的均衡。MATLAB/Simulink仿真表明在所提控制策略下,变换器可以获得稳定的直流输出电压,子模块电容电压实现了较好的均衡,同时各个子模块的开关频率也实现了一致,结果比较理想。
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| 关 键 词： | 双向MMC型DC-DC变换器 控制策略 定交直流电压控制 开关频率 |
| 收稿时间： | 2018-06-15 |
Research on Control Strategy of Bidirectional Modular Multilevel DC-DC Converter |
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| WANG Jian,WANG Yi,FU Chao. Research on Control Strategy of Bidirectional Modular Multilevel DC-DC Converter[J]. Modern Electric Power, 2019, 36(3): 73-79 |
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| Authors: | WANG Jian WANG Yi FU Chao |
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| Affiliation: | State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China |
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| Abstract: | Bidirectional modular multilevel DC-DC converter has received extensive attention because of its advantages of electrical isolation, flexible control of DC power, and high voltage and high-power applications. A control strategy for bidirectional modular multilevel DC-DC converter is presented in this paper. The control strategy adopts the constant AC and DC voltage control to realize the control of the converters active and reactive power in the overall control. The valves control adopts the method which produces the trigger pulse firstly, then sorts and balances the voltage of sub modules(SMs) to achieve the balance of the energy of the converters arm. The Matlab/Simulink simulation shows that the converter can obtain a stable DC output voltage under the proposed control strategy. The capacitor voltages of SMs are well balanced. At the same time, the switching frequency of each SM is also consistent, and the result is ideal. |
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| Keywords: | bidirectional modular multilevel DC-DC converter control strategy constant AC and DC voltage control switching frequency |
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