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무변압기형 태양광 시스템에서 누설전류를 제거하기 위한 3레벨 인버터의 단순 SVPWM
A Simplified SVPWM for Three Level Inverters to Eliminate Leakage Currents in Transformeless Photovoltaic Systems 원문보기

전기학회논문지 = The Transactions of the Korean Institute of Electrical Engineers, v.65 no.2, 2016년, pp.319 - 328  

아르살란 안살리 (Dept. of Electronics System Engineering, Hanyang University) ,  김희준 (Dept. of Electronics System Engineering, Hanyang University)

Abstract AI-Helper 아이콘AI-Helper

This paper proposes a simplified SVPWM for three level inverters in transformerless photovoltaic (PV) systems. With the proposed SVPWM the three level space vector (SV) diagram is divided into only six sectors as in conventional two level SV diagram in such a way that only seven SVs are used among a...

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제안 방법

  • In this paper a simplified SVPWM for three level inverter is proposed by which the three level SV diagram is simplified into a two level SV diagram thus reducing the computational effort required to obtain the on time calculations for all the voltage vectors available in conventional three level SVPWM. Also with the proposed method the common mode voltage of three level inverter is kept constant by using only medium vectors and a zero vector only.
  • The proposed techniques however, maintains the constant CM voltage to eliminate leakage currents but the detailed implementation steps are not provided for these modulation techniques. In this paper a simplified SVPWM is proposed to solve the problem of leakage currents in transformerless grid-connected PV inverter systems. The proposed SVPWM is simplified in such a way that it only uses seven SVs (six medium and a zero SV) among a total of twenty seven SVs available for three level inverter.
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참고문헌 (10)

  1. Sebaaly, Fadia, Hadi Y. Kanaan, and Nazih Moubayed. "Three-level neutral-point-clamped inverters in transformerless PV systems-State of the art." In proceedings of 17th IEEE Mediterranean Electro technical Conference (MELECON), 2014. 

  2. Azri, Maaspaliza, and Nasrudin Abd Rahim. "Trans formerless power converter for grid-connected PV system with no-ripple input current and low ground-leakage current." In proceedings of 3rd IET International Conference on Clean Energy and Technology (CEAT), 2014. 

  3. Buticchi, Giampaolo, Davide Barater, Emilio Lorenzani and Giovanni Franceschini. "Digital control of actual grid-connected converters for ground leakage current reduction in PV transformerless systems." IEEE Trans. on Industrial Informatics, Vol. 8, no. 3, pp. 563-572, 2012. 

  4. Song, Xiaomei, Wenjie Chen, Yang Xuan, Bin Zhang and Jiao Zhang "Common mode leakage current analysis for transformerless PV system with long DC side cables." In proceedings of 9th IEEE International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia), 2015. 

  5. Lopez, Oscar, et al. "Eliminating ground current in a transformerless photovoltaic application." IEEE Trans. on Energy Conversion, Vol. 25, no. 1, pp. 140-147, 2010. 

  6. Vazquez, Nimrod, Marco Rosas, Claudia Hernandez, Esli Vazquez and Francisco Perez-Pinal. "A New Common- Mode Transformerless Photovoltaic Inverter." IEEE Trans. on Industrial Electronics, vol. 62, no. 10, pp. 6381-6391, 2015. 

  7. Zhou, Yan, and Hui Li. "Analysis and suppression of leakage current in cascaded-multilevel-inverter-based PV systems." IEEE Trans. on Power Electronics, Vol. 29, no. 10 pp. 5265-5277, 2014. 

  8. Bharatiraja, C., S. Raghu, and Ramkumar Palanisamy. "A new space vector pulse width modulation for reduction of common mode voltage in three level neutral point diode clamped multilevel inverter." In proceedings of IEEE International Conference on Advances in Engineering, Science and Management (ICAESM), 2012. 

  9. Lee, June-Seok, and Kyo-Beum Lee. "New modulation techniques for a leakage current reduction and a neutral-point voltage balance in transformerless photovoltaic systems using a three-level inverter." IEEE Trans. on Power Electronics, Vol. 29, no. 4, pp. 1720-1732, 2014. 

  10. VCavalcanti, Marcelo C., et al. "Eliminating leakage currents in neutral point clamped inverters for photovoltaic systems." IEEE Trans. on Industrial Electronics, Vol. 59, no. 1, pp. 435-443, 2012. 

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