A dual-window transient energy ratio-based adaptive single-phase reclosure criterion for EHV transmission line

作者：Lin Xiangning^*; Liu Haifeng; Weng Hanli; Liu Pei; Wang Bin; Bo Zhiqian Q

来源：IEEE Transactions on Power Delivery, 2007, 22(4): 2080-2086.

DOI：10.1109/TPWRD.2007.905346

• close-opening-open-closing morphological gradient (COOCG)
• dual-window energy ratio
• mathematical morphology (MM)
• permanent fault
• self-adaptive reclosure
• transient fault

A criterion of dual-window transient energy ratio (ER) to improve the adaptability of the. self-adaptive autoreclosure of transmission line is proposed. The redundancy of setting of the criterion can be enhanced in comparison with the criterion of single-window transient energy. To effectively extract the high-frequency energy of the voltages, a novel concept of close-opening pen-closing morphological gradient (COOCG) is put forward. Compared with the multiresolution morphology gradient transform, COOCG has a lower unbalanced output when processing the steady-state signal; therefore, the threshold of ER can be lowered to improve the successful rate of fault discrimination. EMTP-based simulation results show that the COOCG-based autoreclosure scheme improves the reliability of. discrimination and is promising to be used in the real power systems.

• 出版日期2007-10
• 单位三峡大学; 华中科技大学