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Modern travelling wave based fault location techniques for HVDC transmission lines |
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| Authors: | Ping Chen Bingyin Xu Jing Li Yaozhong Ge |
| Institution: | 1. Department of Electrical Engineering, Shandong University of Technology, Zibo 255049, China 2. Shandong Kehui Electric Power Automation Co, Ltd, Zibo 255087, China 3. Department of Electric Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China |
| Abstract: | The modern travelling wave based fault location principles for transmission lines are ana-lyzed. In order to apply the travelling wave principles to HVDC transmission lines, the special tech-nical problems are studied. Based on this, a fault locating system for HVDC transmission lines is developed. The system can support modern double ended and single ended travelling wave princi-ples simultaneously, and it is composed of three different parts: travelling wave data acquisition and processing system, communication network and PC based master station. In the system, the fault generated transients are induced from the ground leads of the over-voltage suppression ca-pacitors of an HVDC line through specially developed travelling wave couplers.The system was applied to 500 Kv Gezhouba-Nanqiao(Shanghai)HVDC transmission line in China. Some field op- eration experiences are summarized, showing that the system has very high reliability and accu- racy,and the maximum location error is about 3 km(not more than 0.3% of the total line length). Obviously, the application of the system is successful, and the fault location problem has finally been solved completely since the line operation. |
| Keywords: | fault location global positioning system HVDC transmission lines repeaters |
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