矿热炉无功补偿系统仿真分析

Analysis of Submerged Arc Furnace Reactive Power Compensation System

在矿热炉系统工作过程中存在着功率因数低以及三相电流不平衡的现象,不仅消耗了大量的电能,同时也给整个供电系统带来了各种电能质量问题。可以通过对矿热炉系统的无功补偿能很好的解决上述两个问题,提出了以对称分量法为基础的无功补偿方法,并利用负荷正、负序瞬时有功、无功功率理论实现了对矿热炉系统的功率因数和三相平衡度多目标的控制。同时搭建了某矿热炉无功补偿系统的仿真模型,仿真结果表明,改进方法能有效地提高矿热炉系统的功率因数,并降低三相电流不平衡度,为矿热炉无功补偿系统的优化提供了科学的依据。

The phenomenon of low power factor and three phase current unbalance generally exist in the working process of submerged arc furnace,which not only consumes a lot of energy,but also brings a variety of power quality problems to the entire power system. Reactive power compensation of submerged arc furnace system can solve these two problems,this paper presents a method of reactive power compensation based on symmetrical components,and uses load positive and negative sequence instantaneous active and reactive power theory to realize the submerged arc furnace system multi-objective control of the power factor and three-phase equilibrium. And a simulation model of submerged arc furnace reactive power compensation system is built. The simulation results show that the proposed method can solve the low power factor and phase imbalance problems.