Time filter

Source Type

Thiruvananthapuram, India

Unnikrishnan A.K.,The Power Electronics Group | Chandira S.E.,Coimbatore Institute of Technology | Subhash J.T.,The Power Electronics Group
International Journal of Applied Engineering Research | Year: 2015

Active filters are considered as credible solutions to the growing current harmonics in the grid. Shunt Hybrid Active Power Filter when implemented suffers from different transportation delay for different harmonics currents. The method used to extract the harmonics current, plays an important role in the performance of the active filter. Compensating a selected number of harmonics offers several advantages such as optimization of rating, reduced bandwidth of controller, and reduced switching frequency. Here, a shunt hybrid active power filter is implemented with a time-domain selective harmonic detection method, by which all the harmonics of interest are suppressed. A method is devised to allow setting transportation delay compensation, individually for each harmonics, which is important for Shunt Hybrid Active Power Filter. A three phase shunt hybrid active filter is simulated using PSIM simulation package to validate the selective harmonic detection method. Simulation results verifying the performance of the method and operation of shunt hybrid active filter are also given. © Research India Publications.

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