电铁系统影响下的煤矿电网负序电流治理方案研究

随着电气化铁路系统的迅速发展,大量煤矿电网都与电铁牵引供电系统共网运行,由于电铁牵引负荷产生负序电流注入电网,其对煤矿电网的电能质量造成很大影响,影响煤矿电网的安全运行。本文结合山西某煤矿实际电网运行情况,测试、分析了与电气化铁路系统共网运行的煤矿电网负序电流特点,同时分析了现有有源负序治理方法的优缺点,并选取合适的算法集成于有源治理设备MARS中进行煤矿电网负序电流治理。最后利用仿真软件PSCAD/EMTDC进行仿真分析,验证其是有效可行的。

Study on Negative Sequence Current Treatment Scheme for Coal Mine Power System Influenced by Electric Railway

With the development of electric railway, the coal mine power system and traction power supply system are interconnected to power grid. The negative sequence current generated by the electric traction load has a great impact on power quality of coal mine power system, which affects the safe operation of coal mine power network. The characteristics of negative sequence current in coal mine power system interconnected with traction power supply system is tested and analyzed in this paper, besides, the advantages and disadvantages of treatment methods for negative sequence current is analyzed and the appropriate algorithm is selected to integrated in MARS for negative sequence elimination. The simulation results using PSCAD show that the method proposed in this paper is effective and feasible.