| 基于MMC桥臂电流的STATCOM不平衡补偿控制方法 |
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| 引用本文： | 李婧,袁旭峰,袁晓敏,刘安茳.基于MMC桥臂电流的STATCOM不平衡补偿控制方法[J].电测与仪表,2018,55(19):62-66. |
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| 作者姓名： | 李婧 袁旭峰 袁晓敏 刘安茳 |
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| 作者单位： | 贵州大学电气工程学院 |
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| 基金项目： | 国家自然科学基金(51667007)；中国南方电网有限责任公司重点科技项目(GZKJQQ00000417)。Project Supported by National Natural Science Fund (51667007); The key science and technology projects of China Southern Power Grid Co., Ltd. (GZKJQQ00000417). 0 引言 |
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| 摘 要： | 为稳定模块化多电平静止同步补偿器(MMC-STATCOM)的综合补偿,其交流侧电流、内部环流和子模块电容电压均须加以控制。文章首先分析了MMC-STATCOM同时补偿无功和负序电流的原理;然后针对一般方法将MMC交流侧电流和环流分开控制,提出一种基于MMC桥臂电流的STATCOM不平衡补偿控制方法,以实现MMC内外特性的双重控制,减少了专门的环流抑制器,并采用准PR控制器进行MMC上、下桥臂电流的无静差跟踪,以减少控制系统的复杂程度;最后,在PSCAD/EMTDC中进行仿真验证,结果表明所提方法可以实现STATCOM综合补偿,同时能有效抑制MMC内部环流。
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| 关 键 词： | 模块化多电平换流器 静止同步补偿器 综合补偿 桥臂电流 准PR控制 |
| 收稿时间： | 2017/9/10 0:00:00 |
| 修稿时间： | 2017/9/10 0:00:00 |
STATCOM Unbalanced Compensation Control Method Based on MMC Bridge Current |
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| LI Jing,YUAN Xufeng,YUAN Xiaomin and LIU Anjiang.STATCOM Unbalanced Compensation Control Method Based on MMC Bridge Current[J].Electrical Measurement & Instrumentation,2018,55(19):62-66. |
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| Authors: | LI Jing YUAN Xufeng YUAN Xiaomin and LIU Anjiang |
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| Affiliation: | College of Electric Engineering,Guizhou University,College of Electric Engineering,Guizhou University,College of Electric Engineering,Guizhou University,College of Electric Engineering,Guizhou University |
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| Abstract: | Under the unbalanced load condition, the AC side current, the internal circulation and the sub-module capacitor voltage must be considered for the comprehensive compensation of the static synchronous compensator based on modular multi-level converter (MMC-STATCOM). Firstly,the working principle of the comprehensive compensation in modular multilevel converter based MMC-STATCOM is analyzed; Then, in allusion to existing control methods control the ac current and circulating current by separating each component, a STATCOM unbalanced compensation control method based on MMC bridge current is proposed, can simultaneously control the internal and external characteristics of MMC-STATCOM without a dedicated inner circulating current controller, and the quasi-PR controller is used to realize the static tracking of the upper and lower MMC bridge current, which makes the overall control structure simple; Finally, simulation platform of MMC-STATCOM is built in PSCAD /EMTDC, the simulation results show that the proposed method can realize the comprehensive compensation of STATCOM, and also can restrain the internal circulation of MMC effectively. |
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