动态无功补偿在中型材生产中的应用

Application of Dynamic Reactive Power Compensation in Medium Profile Production

通过对安徽某钢厂供电系统的拓扑结构及负载的电气参数对补偿容量和各次谐波含量的具体分析,根据无功补偿原理,确定了基于静态无功补偿装置SVG与滤波器FC组合的电能质量治理方案。根据轧钢生产的现实运行情况,对方案投入前后的电网状况进行了比对剖析,得出如下结论:(1)投入SVG+FC动态无功补偿装置后,系统电压和电流波形同相位且接近于标准正弦波,达到了期待的补偿效果和滤波效果;(2)系统的平均功率因数由装置投运前的0. 80提高到0. 94,降低了线路损耗,提高了变压器和供电线路的带载能力;(3) SVG可以自动跟踪补偿电网,减少对电网的冲击,有效地降低了现场生产对电网的污染。

Through the specific analysis of the topological structure of the power supply system and the electric parameters of the load on the compensation capacity and the content of each harmonic of a steel plant in Anhui Province,according to the principle of reactive power compensation,the power quality control scheme based on the combination of static reactive power compensation device SVG and filter FC is determined.The conclusions are as follows:(1)after the SVG+FC dynamic reactive power compensation device is put into operation,the voltage and current waveforms of the system are in phase and close to the standard sine wave,achieving the expected compensation effect and filtering effect.(2)The average power factor of the system is increased from 0.80 to 0.95 before the device is put into operation,which reduces the line loss and improves the carrying capacity of the transformer and the power supply line.(3)SVG can automatically track and compensate the power grid,reduce the impact on the power grid,and effectively reduce the pollution of field production to the power grid.