| 多功能串联补偿器虚拟阻抗柔性限流及其运行机理 |
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| 引用本文： | 涂春鸣,熊卓,郭祺,姜飞,杨洁.多功能串联补偿器虚拟阻抗柔性限流及其运行机理[J].电源学报,2019,17(3):162-171. |
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| 作者姓名： | 涂春鸣 熊卓 郭祺 姜飞 杨洁 |
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| 作者单位： | 湖南大学电气与信息工程学院;长沙理工大学电气与信息工程学院 |
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| 基金项目： | 国家自然科学基金资助项目（51377051）；湖南省教育厅科研资助项目（17C0040） |
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| 摘 要： | 针对短路故障时冲击电流的柔性控制,提出了一种自适应虚拟阻抗柔性限流的多功能串联补偿器MFSC(multi-functional series compensator)拓扑结构及控制策略。分析其在正常运行和不同类型短路故障时的工作状况及模式切换过程,阐述三相四桥臂串联逆变器中引入虚拟阻抗的控制方法,建立短路故障数学模型,并给出虚拟阻抗和晶闸管支路限流阻抗参数设计方法。仿真及实验结果表明,MFSC能有效抑制不同类型短路故障电流,故障发生后,虚拟阻抗控制可实现电能质量补偿模式与限流模式间的平滑切换,实现故障电流与继电保护整定值相配和。
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| 关 键 词： | 柔性限流 虚拟阻抗 模式切换 电压补偿 |
| 收稿时间： | 2017/7/6 0:00:00 |
| 修稿时间： | 2018/8/6 0:00:00 |
Multi-functional Series Compensator Based on Virtual Impedance Flexible Current-limiting and Its Operating Mechanism |
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| TU Chunming,XIONG Zhuo,GUO Qi,JIANG Fei and YANG Jie.Multi-functional Series Compensator Based on Virtual Impedance Flexible Current-limiting and Its Operating Mechanism[J].Journal of power supply,2019,17(3):162-171. |
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| Authors: | TU Chunming XIONG Zhuo GUO Qi JIANG Fei and YANG Jie |
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| Affiliation: | College of Electrical and Information Engineering, Hunan University, Changsha 410082, China,College of Electrical and Information Engineering, Hunan University, Changsha 410082, China,College of Electrical and Information Engineering, Hunan University, Changsha 410082, China,School of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha 410004, China and College of Electrical and Information Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | Aiming at the flexible control of inrush current under short-circuit fault, the topological structure and control strategy for a multi-functional series compensator(MFSC) based on virtual impedance flexible current-limiting are proposed. Its working modes and mode switching process under normal operation and different types of short-circuit fault are analyzed. The control method for virtual impedance which is introduced to a three-phase four-leg series inverter is analyzed, and a mathematical model of short-circuit fault is established. The design method for parameters of virtual impedance and thyristor branch current-limiting impedance is given. Simulation and experimental results showed that the proposed MFSC can effectively suppress different types of short-circuit fault current; after a fault occurs, the virtual impedance control can realize smooth switching between power quality compensation mode and current-limiting mode, as well as the coordination of fault current and the relay protection setting value. |
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| Keywords: | flexible current-limiting virtual impedance mode switching voltage compensation |
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