Power Quality Improvement of a grid interconnected photovoltaic system by using Shunt Active Power Filter

This paper proposes the improved methodology of power quality in grid interconnected photo voltaic system by using shunt active power filter . With development of new functionalities solar energy based Photovoltaic cells are upcoming energy source with higher efficiency. Solar energy being naturally available in abundance and nonpolluting is one of the most promising sources. Excessive use of power electronics devices lead to power quality problems. Harmonics are major problem diminishing the power quality. Active Power filter are powerful tool for mitigation of harmonics. Active filter suppress harmonic current and compensate reactive power simultaneously. This paper presents the performance of Shunt active filter with VSI topology using synchronous reference frame theory. By this methodology harmonic suppression is possible within Renewable energy resources are being increasingly connected in distribution systems utilizing power electronic converters. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can be utilized as power converter to inject power generated from RES to the grid, and shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously.