变频调速输油系统电机功率因数的预测和控制

Calculation and Control of Motor′s Power Factor in Oil Transferring System with Fre quency Variation Speed-Regulation

通过对大庆油田采油二厂异步电机 -离心泵变频调速输油系统的实验研究和大量的数据测试 ,得出了电机功率因数与变频器频率之间的函数关系 ,从而可以在设定变频器的频率时 ,实现对电机功率因数的预测和控制 ,实验研究的结果有利于提高变频调速输油系统的自动化水平 。

The functional relation between the motor′s power factor and the inverter′s frequency is proposed in this paper based on the experimental research and a huge amount of measurement data which are about oil transferring system with frequency variation speed-regulation in Daqing No 2 Production Plant. Therefor, on the assumption of inverter′s frequency, calculation and control of motor′s power factor is a scheme with great possibilities. The result of experiment and research is a great helpful to raising of automatic level in oil transferring system with frequency variation speed-regulation at the mean time it is also beneficial to carry out the plan of energy-saving and efficiency-increasing.