Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)
- 2018.07a
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- Pages.144-146
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- 2018
A Novel Harmonic Compensation Method for the Single Phase Grid Connected Inverters
단상 계통연계 인버터를 위한 새로운 고조파 보상법
- Khan, Reyyan Ahmad (Department of Electrical Engineering, Soongsil University) ;
- Ashraf, Muhammad Noman (Department of Electrical Engineering, Soongsil University) ;
- Choi, Woojin (Department of Electrical Engineering, Soongsil University)
- 칸 아마드 레이안 ;
- 아쉬라프 모하마드 노만 ;
- 최우진
- Published : 2018.07.03
Abstract
In order to meet the harmonics standards such as IEEE 519 and P1547 the output quality of a grid connected inverter should satisfy a certain level of Total Harmonic Distortion (THD) value. However, the output quality of an inverter gets degraded due to the grid voltage harmonics, the dead time effects and the nonlinearity of the switches, which all contributes to a higher THD value of the output. In order to meet the required THD value for the inverter output under the distorted grid condition the use of harmonic controller is essential. In this paper a novel feedforward harmonic compensation method is proposed in order to effectively eliminate the low order harmonics in the inverter current to the grid. In the proposed method, unlike the conventional harmonic control methods, the hamonic components are directly compensated by the feedforward terms generated by the PR controller with the grid current in the stationary frame. The proposed method is simple in implementation but powerful in eliminating the harmonics from the output. The effectiveness of proposed method is verified through the PSIM simulation and the experiments with a 5kW single phase grid connected inverter.
Keywords
- Single Phase Grid Connected Inverter (SPGCI);
- Harmonic Compensation Method;
- Total Harmonic Distortion (THD) and Harmonic Standard