基于线路参数识别的矿井选择性漏电保护研究

Research on Selective Electric Leakage Protection of Coal Mine Based on Lines Parameter Identification

为进一步保证矿井选择性漏电保护的速动性、可靠性,提出在总馈电开关处使用附加直流电源的方法、分支馈电开关处使用Ⅱ段式的保护,其中零序电流型保护作为Ⅱ段保护,基于线路参数识别的方法作为Ⅰ段保护。重点介绍参数识别的判据,给出了实现保护功能的硬件电路框图。该装置采用多数据融合技术,以实现保护装置的智能化,提高保护装置的实用性。

In order to further guarantee the quicky responce and reliability of selective leakage protection of coal mine, proposes the method that uses additional DC power at the bus feeder switch, and the Ⅱ-type protection applies at the branch feeder switch. The zero-sequence current protection is the Ⅱ-type protection and the method that based on lines parameter identification is the Ⅰ-type protection. Emphasis introduces the judgements of parameter identification and gives the hardware circuit frame drawing that realize the protection function. This device adopts the multi-data converge technology, which realizes the intelligent of the protection device and improves the practical value of the device.