基于ETAP的钢铁企业电网谐波分析

摘要

基于对炼钢生产线上主要用电设备的谐波产生原因和谐波特性的充分调研,以某实际钢铁企业电网为例,利用ETAP软件对其供电系统进行详细建模.重点研究谐波在钢铁企业电网中的传播特性,明确钢铁企业电网在公共连接点处(PCC)的谐波污染责任.并仿真计算可能出现的谐振点,通过案例分析验证谐振原因.最后,针对系统内出现的并联谐振设计滤波器,为企业电网的谐波谐振抑制和电能质量提高提供一种方法.%Based on the investigation of harmonic generation reason of the main equipment and its harmonic characteristics in the steelmaking line,the power system of an iron and steel enterprise is modeled by ETAP software.The propagation characteristics in the power grid is studied and the harmonic pollution responsibility of the iron and steel enterprises in the PCC is clear.The possible resonant points are found out via simulation and calculation and the resonant causes are analyzed and verified.Finally,the filter is designed according to parallel resonance in system,It provides a method for harmonic and resonance suppression and power quality improvement of enterprise power grid.