| 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): |
| JIANG Fei,TU Chunming,XIONG Longzhu,GUO Qi,WU Liangui.Active short circuit current adjustment by modified dynamic voltage restorer[J].Electric Power Automation Equipment,2017,37(9): |
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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。 |
| 关键词: 动态电压恢复器 故障限流 滤波器 多功能 主动调节 |
| DOI：10.16081/j.issn.1006-6047.2017.09.019 |
| 分类号:TM761 |
| 基金项目:国家自然科学基金资助项目(51377051) |
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| Active short circuit current adjustment by modified dynamic voltage restorer |
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JIANG Fei1, TU Chunming2, XIONG Longzhu3, GUO Qi2, WU Liangui2
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1.College of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha 410004, China;2.Power Conversion and Control Engineering Technology Research Center, Hunan University, Changsha 410082, China;3.State Grid Zhangjiajie Electric Power Bureau, Zhangjiajie 427000, 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. |
| Key words: dynamic voltage restorer fault-current limiting electric filters multi-function active adjustment |
