| 新型动态电压恢复器对短路故障电流主动调节的研究 |
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| 引用本文： | 姜飞,涂春鸣,熊龙珠,郭祺,吴连贵.新型动态电压恢复器对短路故障电流主动调节的研究[J].电力自动化设备,2017,37(9). |
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| 作者姓名： | 姜飞 涂春鸣 熊龙珠 郭祺 吴连贵 |
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| 作者单位： | 长沙理工大学 电气与信息工程学院，湖南 长沙 410004,湖南大学 国家电能变换与控制工程技术研究中心，湖南 长沙 410082,国网张家界供电局，湖南 张家界 427000,湖南大学 国家电能变换与控制工程技术研究中心，湖南 长沙 410082,湖南大学 国家电能变换与控制工程技术研究中心，湖南 长沙 410082 |
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| 基金项目： | 国家自然科学基金资助项目(51377051) |
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| 摘 要： | 提出在动态电压恢复器(DVR)系统的串联逆变器交流输出端增设反并联晶闸管支路的拓扑,以实现动态电压补偿功能与故障电流限制功能。分析所提拓扑的故障电流限制功能机理,建立其运行数学模型;在限流功能动态过程分析基础上,提出一种通过调整晶闸管触发相位角的故障电流调节方法,给出限流阻抗的调节范围,从而解决限流阻抗与电网原有过流保护的配合问题;最后,采用PSCAD/EMTDC仿真软件和实验室样机,验证所提拓扑及控制方法的正确性。
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| 关 键 词： | 动态电压恢复器 故障限流 滤波器 多功能 主动调节 |
| 收稿时间： | 2016/9/8 0:00:00 |
| 修稿时间： | 2017/4/17 0:00:00 |
Active short circuit current adjustment by modified dynamic voltage restorer |
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| JIANG Fei,TU Chunming,XIONG Longzhu,GUO Qi and WU Liangui.Active short circuit current adjustment by modified dynamic voltage restorer[J].Electric Power Automation Equipment,2017,37(9). |
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| Authors: | JIANG Fei TU Chunming XIONG Longzhu GUO Qi and WU Liangui |
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| Affiliation: | College of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha 410004, China,Power Conversion and Control Engineering Technology Research Center, Hunan University, Changsha 410082, China,State Grid Zhangjiajie Electric Power Bureau, Zhangjiajie 427000, China,Power Conversion and Control Engineering Technology Research Center, Hunan University, Changsha 410082, China and Power Conversion and Control Engineering Technology Research Center, Hunan University, Changsha 410082, China |
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| Abstract: | A modified topology of DVR(Dynamic Voltage Restorer) is proposed, which has an additional bidi-rectional thyristor branch across the output terminals of series inverter to realize the functions of dynamic voltage compensation and fault-current limiting. The mechanism of its fault-current limiting is analyzed and an operating model is established, based on which, a method of fault-current adjustment by changing the firing angle of thyristor is proposed and the adjustment range of current limiting impedance is developed for its cooperation with the existing over-current protection of grid. The correctness of the proposed topology and adjustment method is verified by the simulation based on the PSCAD/EMTDC software and a lab prototype. |
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| Keywords: | dynamic voltage restorer fault-current limiting electric filters multi-function active adjustment |
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