Real-time VAr control by SCADA

The operation and advantages of the SCADA (supervisory control and data acquisition) capacitor control called CAPCON (capacitor control) are presented. CAPCON is used to control VArs systemwide by switching substation capacitor banks based on real-time VAr and voltage data instead of the traditional time clock method. CAPCON has many benefits, which should increase as it is expanded to more capacitor banks on the system. There are cost savings in line losses, generator fuel, and better planning and utilization of substation equipment. Control is based upon real-time conditions, providing much more efficient and precise operation of capacitors and a resulting improvement in reactive power flow. By improving the control of capacitors, CAPCON has given the company the ability to serve its customers better