光纤纵差保护在防止矿井供电短路时越级跳闸的研究

Optical Fiber Differential Protection to Prevent Short Circuit of Mine Supply of Grade Trip

提出了一种适用于中低压短线路的电流综合量差动保护原理的光纤纵差保护,重点分析了电流综合量常规线路保护与普通常规线路保护在各种短路情况下的灵敏度,研究了纵差保护原理和纵差保护系统主要功能。阐明采用光纤纵差保护不仅可以提高灵敏度,而且可以减少光纤纵差保护两侧需要交换的数据量,可实现用两侧电流综合量取代传统的分相电流差动,解决煤矿因短路事故而发生越级跳闸。

Presents a short way for the low amount of current differential protection integrated optical fiber differential protection principle,analyzes the current amount of conventional integrated circuit protection with ordinary conventional short-circuit line protection in a variety of sensitivity of the case study of the longitudinal differential protection principle and the main functions of longitudinal differential protection system.Clarify the use of optical fiber differential protection can not only improve the sensitivity,but also reduce the need for optical fiber differential protection on both sides of the amount of data exchange can be achieved using both sides of the consolidated amount of current to replace the traditional current differential,address coal mine accidents occurred because of short circuit grade trip.