煤矿供电系统分布式保护技术研究

Research on distributed protection technology of coal mine power supply system

针对煤矿供电系统中长期存在的越级跳闸问题,进行了重点分析,结合目前先进的光纤纵联保护技术,提出了分布式保护方案。该保护系统中,各保护设备根据本开关检测到的故障电流信号和接收到的故障信息,最终由故障区域判断原则确定故障区域,隔离故障。分布式智能保护设备以DSPF2812为控制核心,开关间采用光纤以太网或CAN总线的通信方式,提高了通信的可靠性和灵活性,试验结果验证了分布式保护方案的可行性。

In view of the override trip problem in the coal mine power supply system,combined with the advanced fiber longitudinal protection technology,the distributed protection scheme was proposed.In the protection system,according to the detected fault current signal and the received fault information,the fault area is determined and then isolated by the protection equipments based on the fault region judgment principle.Taking DSPF2812 as the control core of distributed intelligent protection equipment,using the communication mode of optical Ethernet or CAN bus between witches,the reliability and flexibility of communication was improved,the feasibility of distributed protection scheme was verified by field test.