A Robust Harmonic Compensation Technique for the Single Phase Grid Connected Inverters under the Distorted Grid Voltage Conditions
- Authors
- Khan, R.A.; Ashraf, M.N.; Choi, W.
- Issue Date
- May-2019
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- Digital Lock-in Amplifier (DLA); Rotatory Reference Frame (RRF); Single Phase Grid Connected Inverter and Total Harmonic Distortion (THD)
- Citation
- ICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia, pp.291 - 297
- Journal Title
- ICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia
- Start Page
- 291
- End Page
- 297
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/35153
- ISSN
- 0000-0000
- Abstract
- The performance of Single Phase Grid Connected Inverters (SPGCIs) get degraded due to several detrimental factors such as the grid voltage harmonics, the dead time effect and the turn ON/OFF of the switches and so on, which cause the harmonics at the output of Grid Connected Inverters (GCIs). Therefore, it is not easy to satisfy the harmonic standards such as IEEE 519 and P1547 without the help of harmonic compensator. In this paper, the Digital Lock-in Amplifier (DLA) based harmonic compensation is proposed, which makes it possible to extract the amplitude and phase information of the harmonics from the output current and compensate it by using a simple PI controller in a feedforward manner. In order to show the superior performance of the proposed harmonic compensation technique, it is compared with those of conventional harmonic compensation methods in terms of the effectiveness of harmonic elimination, complexity and implementation. The validity of the proposed harmonic compensation techniques is verified through the PSIM simulation and experiments with a 5kW SPGCI. © 2019 The Korean Institute of Power Electronics (KIPE).
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