Active Harmonic Filtering in Grid Connected Dg Unit by Observor
ElamCheren.S1, Ashok Kumar.L2, Radhakrishnan.G3, Kavin.R4
1ELAM CHEREN.S, Electrical and Electronics Engineering, Sri Krishna college of Engineering and Technology, Coimbatore, India.
2ASHOK KUMAR.L, Electrical and Electronics Engineering, PSG college of Technology, Coimbatore, India.
3RADHAKRISHNAN.G, Electrical and Electronics Engineering, Sri Krishna college of Engineering and Technology, Coimbatore, India.
4KAVIN.R, Electrical and Electronics Engineering, Sri Krishna college of Engineering and Technology, Coimbatore, India.
Manuscript received on 02 June 2019 | Revised Manuscript received on 10 June 2019 | Manuscript published on 30 June 2019 | PP: 869-875 | Volume-8 Issue-8, June 2019 | Retrieval Number: G5356058719/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The power quality issues in distribution system increased due to nonlinear load applications. To compensate harmonics for distributed generation (DG) unit interfacing converters, this paper proposes a current controlled method with an observer. The grid is built out of a controlled voltage source driven by cosine signal generator and this work rigged up for fundamental current control. The suggested current controller consists of pair of decoupled control branches which restricts fundamental and harmonic DG currents. The observer separates fundamental and harmonic currents and reference value of current is generated for the inverter. These observer has many advantage like good structure, systematic, no need of band width fixing, nonprogrammable and sharply tuned filters. The voltage harmonic sum cause addition to the voltage distortion at the point of contact. The conventional feedback procedure minimizes the distortion. The distortion in line current reduces when capacitor value reduced and increase in capacitor value increasethe harmoniccurrent and cause reduction in THD.
Keyword: Current Controller, Current distortion, Distributed Generation, Filters, Observer, Total Harmonic distortion.
Scope of the Article: Smart Grid Communications.