TY - JOUR AU - Hairi, Mohd Hendra AU - Muhammad Nizam Kamarudin, AU - Lee Qui Fang, AU - Ahmad Sadhiqin Mohd Isira, AU - Mohamed Fauzi Packeer Mohamed, PY - 2020/04/30 Y2 - 2024/03/29 TI - Dual-Slope Percentage Bias Differential Relay (87) Protection Strategy for 11kV Underground Power Cable JF - International Journal of Electrical Engineering and Applied Sciences (IJEEAS) JA - IJEEAS VL - 3 IS - 1 SE - Articles DO - UR - https://ijeeas.utem.edu.my/ijeeas/article/view/5778 SP - AB - <p><em>The study focuses on the protection strategy for an underground power cable </em><em>(transmission) for a medium voltage distribution network using dual slope percentage bias </em><em>differential relay (ANSI 87). The underground cable is the bridge that connects the power supply </em><em>from generator to distribution substations, it must be well protected from internal fault that may </em><em>cause insulation breakdown and leads to electrical failure; while remain unaffected for external </em><em>fault conditions. The fault simulation is done with PSCAD software, and the suitable protection </em><em>settings for the applied differential relay is proposed. The study found that the relay is stable for </em><em>external faults while allowing sensitive settings to pick up internal fault if the setting was carefully </em><em>chosen.</em></p> ER -