Abstract：This paper presents a fusion scheme for ground fault line detection in neutral compensated power networks. Fault characteristics as initial abrupt wave, real power and transient are employed in the proposed fusion method. The fusion is implemented with D-S evidence theory and information entropy. Algorithm of fault measures that representing the likelihood of a line tend to be the fault one is constructed. With fault measures and information entropy, the basic probability assignment of evidence theory is formulated for fusion strategy in this paper. Simulations and field fault data prove that the proposed fusion algorithm can improve the reliability and adaptability for line to ground fault detection.
贾清泉, 石磊磊, 王宁, 董海艳. 基于证据理论和信息熵的消弧线圈接地电网融合选线方法[J]. 电工技术学报, 2012, 27(6): 191-197.
Jia Qingquan, Shi Leilei, Wang Ning, Dong Haiyan. A Fusion Method for Ground Fault Line Detection in Compensated Power Networks Based on Evidence Theory and Information Entropy. Transactions of China Electrotechnical Society, 2012, 27(6): 191-197.
[1] Deaton R J. Limitations of ground-fault protection schemes on industrial electrical distribution systems[C]. IEEE IAS-1984 Annual Meeting, 1984: 351-354. [2] Huang W Y, Kaczmarek R. SGL fault detection in presence of strong capacitive current in compensated networks[J]. IEEE Transactions on Power Delivery, 2007, 22(4): 2132-2135. [3] 林湘宁, 高艳, 刘沛, 等. 基于零序补偿导纳的小电流接地系统单相故障保护新方法[J].中国电机工程学报, 2006, 26(10): 45-49. [4] 唐轶, 陈奎, 陈庆, 等. 导纳互差之绝对值和的极大值法小电流接地选线研究[J]. 中国电机工程学报, 2005, 25(6): 49-54. [5] Chaari Onnis, Mnichel Michel, Brouaye Francoise. Wavelet: a new tool for the resonant grounded power distribution system relaying [J]. IEEE Transactions on Power Delivery, 1996, 11(1): 1301-1308. [6] 薛永端, 徐丙垠, 冯祖仁, 等. 小电流接地故障暂态方向保护原理研究[J]. 中国电机工程学报, 2003, 23(7): 51-56. [7] Dong Xinzhou, Shi Shenxing. Identifying single phase to ground fault feeder in neutral noneffectively grounded distribution system using wavelet transform[J]. IEEE Transactions on Power Delivery, 2008, 23(2): 1829-1837. [8] Wang W C, Zhu K, Zhang P, et al. Identification of the faulted distribution line using thyristor-controlled grounding[J]. IEEE Transactions on Power Delivery, 2009, 24(1): 52-60. [9] Zamora J J, Zamora I, Mazon A J, et al. Optimal frequency value to detect low current faults superposing voltage tones[J]. IEEE Transactions on Power Delivery, 2008, 23(4): 1773-1779. [10] 潘贞存, 张慧芬, 张帆, 等. 信号注入式接地选线定位保护的分析与改进[J]. 电力系统自动化, 2007, 31(4): 71-75. [11] 贾清泉, 杨奇逊. 杨以涵. 基于故障测度概念与证据理论的配电网单相接地故障多判据融合[J]. 中国电机工程学报, 2003, 23(12): 6-11. [12] Dempster A P. Upper and lower probabilities induced by a multivalued mapping[J]. Annals of Mathematical Statistics, 1967, 38(2): 325-339. [13] Barnett J A. Computational method for a mathematical theory of evidence[C]. Proceedings of the 7th International Joint Conference on Artificial Intelligence, 1981: 868-875.
2012, Vol. 27 
