基于单片机控制的功率因数自动补偿控制器

Intelligent controller of power-factor automatic compensation based on PIC single chip

介绍了一种用于低压配电系统的智能型功率因数自动补偿控制器,并提出了以三相电压为判据的欠压保护方案.该控制器以PIC16F877单片机为测控中心,自动完成对低压配电系统电气参数的测量、运算、判断及功率因数的自动补偿控制.运行过程中,当系统的功率因数超出其设定范围时,控制器将自动投/切电容器组,控制方式也可以选择手动操作,控制器能够实现功率因数值、有功功率、无功功率、视在功率的显示,具有比较高的可靠性和实用性.

An intelligent controller of power-factor automatic compensation used in low voltage power system is introduced, and an under voltage protective scheme based on there phase voltage is presented. PIC16F877 single chip is acted as the core of the controller, which perform multi-functions automatically such as electric parameters measure, operation, estimation, as well as automatic compensation controlling for power-factor. During operating, in case the power factor of the system was under set value, the capacitor cells would be automatically or manually cut on/off. Furthermore, the controller can display the system parameters momentarily. Experiment shows that the intelligent controller is reliable and practical.