当前位置：
X-MOL 学术
›
Int. J. Electr. Power Energy Sys.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Ultra-fast current differential protection with high-sensitivity for HVDC transmission lines
International Journal of Electrical Power & Energy Systems ( IF 5.2 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.ijepes.2020.106580 Haijin Liu , Bin Li , Weijie Wen , Timothy C. Green , Jihang Zhang , Ning Zhang , Longlong Chen
International Journal of Electrical Power & Energy Systems ( IF 5.2 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.ijepes.2020.106580 Haijin Liu , Bin Li , Weijie Wen , Timothy C. Green , Jihang Zhang , Ning Zhang , Longlong Chen
Abstract Protection of transmission lines is the most important defense against faults in multi-terminal HVDC system. Up until now, no single protection can balance the operation speed and sensitivity needed for all fault types. To solve this problem, a novel current differential protection for HVDC transmission line is proposed in this paper. The intrinsic properties of a HVDC transmission line are analyzed first. Then, essence of ideal current differential protection is revealed and fundamental relations between line models and performance degradation of existing differential protections are discussed. Based on this analysis, a novel current differential protection scheme, including fault detection and faulty pole selection, is developed, and Bergeron model is used to describe the electrical wave propagation process along line, resulting in only simple computations are needed in each calculation cycle. Finally, a simulation model of Wudongde ± 800 kV HVDC project in China is established in PSCAD/EMTDC for verification. By discussing diversified faults and transient processes, simulation results prove that regardless of fault type, distance and transition impedance, the proposed differential protection can respond correctly. Main contribution of this paper is reducing the operation time of differential protection from hundreds of milliseconds to several milliseconds.
更新日期：2021-03-01
京公网安备 11010802027423号