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            1. |Table of Contents|

              Method of Fault Detection and Processing Strategy for Hybrid HVDC Transmission(PDF)


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              Method of Fault Detection and Processing Strategy for Hybrid HVDC Transmission
              ZHENG Mei12 LI Wei3 CHANG Bin3 YAN Heming4 XU Zheng2
              (1. State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China; 2. College of Electric Engineering, Zhejiang University, Hangzhou 310027, China; 3. Global Energy Interconnection Research Institute Co., Ltd., Beijing 102209, China; 4. Beijing Key Laboratory of DC Grid Technology & Simulation (Global Energy Interconnection Research Institute Co., Ltd.), Beijing 102209, China)
              hybrid DC grid HVDC circuit breaker fault detection current limiting strategy ROCOV
              Hybrid HVDC transmission technology has become the research focus of HVDC technology in the future because it combines the economy of traditional HVDC technology and the security and stability of flexible HVDC technology. Fast detection and isolation of DC side faults in VSC stations is always one of the main technical bottlenecks in the development of hybrid DC power grid. High-voltage DC circuit breaker is an important device to solve this problem, and it is also a hot spot of current research. According to the working process of high voltage DC circuit breaker, this paper analyzes the fault detection and current limit control of high voltage DC circuit breaker respectively, and proposes the fault detection method based on ROCOV (rate of change of voltage) and a current limiting strategy of operation of arresters by sequence. The strategy can reduce the action time and fault current peak of the circuit breaker. Finally, the simulation analysis is carried out on PSCAD/EMTDC to verify the reliability and speed of the DC circuit breaker protection scheme.


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              Last Update: 2019-07-15
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