Analysis of Shunt Active Power Filter with Unit Voltage Template Method

The huge increase in usage of power leads to convert and to control the same. While doing these processes, the power electronic converters play an important role. With the use of these converters for conversion of huge electrical power, there are harmonics injected into the system due to the usage of semiconductor devices and for controlling the huge electrical power, there is a reactive power drawing from the system. These two problems create some notable problems like communication interference, heating of electric motors, low power factor etc. Shunt active power filter is used to minimize these two losses effectively. The shunt active power filter is the combination of an inductor and an inverter controlled capacitor. This combination gives the perfect compensating current to minimize and almost to eliminate these two problems. So many techniques are used in this operation. Some of them are instantaneous method, synchronous detection method, unit voltage template method and so on. In this paper, the unit voltage template (UVT) method is used to get the required signals to drive the inverter switches. The results with respect to Total Harmonic Distortion (THD), and Power Factor (PF) are tabulated and compared for both with and without active power filter.