Measurement of Power Frequency with Higher Accuracy Using PIC Microcontroller

AbstractFrequency measurement is an important issue in the field of electrical engineering. Electric power system has become complex over the last decade. The use of distributed generation, the connection of non-linear loads and the presence of some unexpected system faults are the main causes of frequency variations. In addition, power quality includes frequency as a most important index. This paper deals with digital measurement of power frequency i.e. 50Hz using microcontroller based system. This measurement system measures the frequency up to three decimal accuracy. This is generally very useful in load frequency control of power system