Design of Shunt Active Power Filter for Power Quality
Keywords:
Power Quality, Shunt Active Power Filter, harmonics, P-Q theory.Abstract
The power quality of the system can be expressed by the three physical characteristics Voltage, current and frequency. and a power quality issue is defined as “any occurrence disturbance in current, voltage, or frequency that results in damage, upset or failure of end-use equipments”. The higher switching frequency and the non-linearity in the properties of the power electronics devices are mostly responsible for the power quality issue. So importance is being given to the development of Active Power Filters to solve these problems to improve power quality among which shunt active power filter is used to eliminate voltage and load current harmonics and for reactive power compensation. The shunt active power filters have been developed based on control strategies like instantaneous active and reactive power compensation scheme (p-q control) and instantaneous active and reactive current scheme (Id-Iq control). Considering its superior nature, a study on the Id-Iq control scheme based shunt active filter is brought out in this project. The compensation is carried out by the use of PI based controllers. A theoretical study based on both the compensation schemes is done in this paper and then the theory of Id-Iq control scheme is implemented in simulation work and its harmonic compensation results are analyzed.
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