Earticle

초록

영어

Single-phase grid-connected inverters play an important role in small distributed generation (DG) systems. This paper illustrates the circuit configuration and operation principle of a novel single-phase, single-stage, three-switch, fly-back, buck-boost inverter. The equivalent circuits associated with the four operation modes are established for the charging and discharging process. The inverter can operate in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM). Most importantly, a new pulse generation method called pulse energy modulation (PEM) is proposed and applied to the three-switch buck-boost inverter in this paper. PEM signals for controlling the power switches are generated by meeting the output energy demand in each switching period with the stored energy in the coupled fly-back inductors. The duty ratio of PEM is thus determined by the energy demand and dc input voltage. The efficiency of the inverter used PEM is analyzed. A 400W experimental prototype is built in the laboratory to verify the operation of the proposed pulse energy modulation method. The inverter controller employs DSP dsPIC33FJ64MC506 for controlling, detecting and protecting functions. Experimental results have shown that PEM provides a new modulation mechanism for controlling the three-switch buck-boost inverter to inject a sinusoidal current into the grid under a wide range of operating conditions.

목차

Abstract
 1. Introduction
 2. Circuit Configuration and Operation Principle
  2.1. Mode 1: Charging in the Positive Half Cycle
  2.2. Mode 2: Discharging in the Positive Half Cycle
  2.3. Mode 3: Charging in the Negative Half Cycle
  2.4. Mode 4: Discharging in the Negative Half Cycle
 3. Pulse Energy Modulation
  3.1. Discontinuous Conduction Mode
  3.2. Continuous Conduction Mode
  3.3. Operation Area for DCM and CCM
 4. Design of Three-switch Fly-back Buck-Boost Inverter
  4.1. Hardware Design of Inverter System
  4.2. Software Design of Buck-boost Inverter System
 5. Experimental Results
 6. Conclusion
 References

키워드

저자

• Yonggao Zhang [ School of Electrical and Electronic Engineering, East China JiaoTong University Nanchang, Jiangxi, P.R.China ]
• Yanli Gao [ School of Electrical and Electronic Engineering, East China JiaoTong University Nanchang, Jiangxi, P.R.China ]
• Yi Qu [ School of Electrical and Electronic Engineering, East China JiaoTong University Nanchang, Jiangxi, P.R.China ]
• Wanqing Liu [ School of Electrical and Electronic Engineering, East China JiaoTong University Nanchang, Jiangxi, P.R.China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Grid and Distributed Computing

• 간기

  격월간

• pISSN

  2005-4262

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605