基于PSCAD矿山电网越级跳闸实验教学仿真平台

An Experimental Simulation Platform of Mine Network Leapfrog Tripping Based on PSCAD/EMTDC

结合某煤矿6 k V电网发生的越级跳闸事故,阐述了矿山电网保护配置的缺陷及越级跳闸的原因,利用仿真平台对事故现象进行还原仿真;然后结合煤矿电网线路较短以及井下电缆发生短路概率高等实际情况,给出防止越级跳闸的措施,基于PSCAD/EMTDC搭建矿山电网越级跳闸仿真试验平台,并在该平台上仿真验证措施的有效性。该平台可使理论教学与实验教学有机结合,学生可在仿真平台上通过改变线路和保护参数观察矿山电网越级跳闸的现象,以及采取不同措施防止越级跳闸,既保证了学生对基本理论知识的理解,满足教学效果,又能为创新型、综合性实验的开设提供理想平台。

According to the teaching need of mine power supply, an experimental simulation platform of mine network leapfrog tripping is built in this paper based on PSCAD/EMTDC. Firstly, the defects of the protection configuration of mine power network and the reasons of leapfrog tripping are explained with leapfrog tripping accident occurred in a coal mine 6kV network, and the simulation platform is used to restore the accident phenomena. Then according to actual situation of the coal mine, for example, the line of coal mine power grid is much shorter and the short-circuit probability of the underground cable is high, etc. measures are given to prevent tripping and the effectiveness is verified in the simulation platform. Theoretical teaching can be combined with experimental teaching through the platform. Students can observe the tripping phenomena of mine power network and take different measures to prevent tripping by changing the line and protection parameters on the simulation platform. So this method can help students understand the basic theory to ensure teaching effect, and also become a necessary platform for comprehensive and innovating experiments. The practice proves its practicability.