电力电抗器对变频调速系统的谐波影响和分析

Harmonic Influence and Analysis of Power Reactor to the Variable Frequency Speed Regulation System

以冶金工业为背景,对热连轧机组的交流传动装置所产生的电力谐波进行仿真分析,针对交-交变频以及交-直-交变频调速系统产生的谐波对变压器网侧影响,通过对负载参数、变压器原副边电感大小的变化以及在加入电抗器的情况下进行Matlab仿真分析,并对进线电抗器的作用及取值范围进行了界定。仿真结果可以为使用变频装置时供用电系统设计及谐波治理提供设计依据,从而提高了大型拖动设备供电电源的品质。

The simulation and analysis to the power harmonic which is produced by the AC drive device of the hot strip mill was given in the background of the metallurgical industry.Aiming at the line-side effects of AC-AC frequency conversion and AC-DC-AC frequency conversion control system harmonic,the Matlab simulation and analysis was made in three circumstances,such as the load parameters,the inductance value changes of transformer primary side and secondary side,and adding reactor etc.,and defined the functions and value ranges of the line reactor.The simulation results can provide a design basis for the harmonic control and the power supply system when the system uses the variable frequency devices,and then improves the power supply quality of the large drag device.