Paper Details

Power factor is the ratio between active power and apparent power. As many of the loads are inductive innature; current will lag the voltage and so power factor become low. The lagging power factor is improved byconnecting the static capacitors at the load side. Micro Controller accomplishes the process of improving the powerfactor. Demand for electrical power is more compared to electrical power generated. Reducing the loss of electricalpower in industries can give a better conservation of electrical energy this can be implemented by controlling the powerfactor. Controlling power factor can save 40% of the power that is used, it not only saves the electric power but also itsaves billing charges for industries. The ultimate aim is to control the power factor using micro controller technology.The basic central processing unit used here is c8051f133 Micro Controller. The input to the controller are obtainedusing instrumentation transformer. The Micro Controller calculates the actual power factor. When this power is lessthan the present value of the Micro Controller sends the signal to the relay circuit with switches on the capacitor banksin step until the power factor is corrected to the present values. Similarly when the actual power factor is more than thepresent values, the capacitor banks are switched off in steps. The present values and actual values are displayed in LCDunit. The relay circuit is basically a transistor switching circuit which is switched on and off by the signal from microcontroller.

Mrs. P.Nalini, Balasubramanian.E, Hari Shankar.S, Jaya Ganesh.S, “INTELLIGENT POWER FACTOR STABLIZATION FOR INDUSTRIAL APPLICATION”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 2, Issue 3, pp. 531-534, March 2015.