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Seven‐level power conversion system for solar power generation system
- Source :
- IET Renewable Power Generation. 14:1387-1394
- Publication Year :
- 2020
- Publisher :
- Institution of Engineering and Technology (IET), 2020.
-
Abstract
- This study proposes a seven-level power conversion system for a solar power generation system. This seven-level power conversion system consists of a DC–DC power converter and a cascade DC–AC inverter. The cascade DC–AC inverter comprises a full-bridge inverter and a T-type inverter. The T-type inverter generates a three-level quasi-square-wave voltage and the full-bridge inverter provides a three-level high-frequency pulse voltage. The amplitude of the three-level quasi-square-wave voltage is double that of the three-level high-frequency pulse voltage, so seven levels of AC voltage are synthesized. Only the full-bridge inverter with lower DC bus voltage uses high-frequency switching so switching losses are effectively reduced. The novelty of the proposed cascade DC–AC inverter is that the output power of T-type inverter is controlled by regulating the DC bus voltage, so no real power is supplied from the full-bridge inverter and an independent power source is not required to provide power to the full-bridge inverter. The negative terminal voltage for solar cell array keeps almost constant to reduce the leakage current of proposed seven-level power conversion system. A hardware prototype with a digital signal processor controller is developed to verify the performance of seven-level power conversion system for a solar power generation system.
- Subjects :
- Digital signal processor
Renewable Energy, Sustainability and the Environment
Computer science
business.industry
020209 energy
020208 electrical & electronic engineering
Electrical engineering
02 engineering and technology
law.invention
Power (physics)
Control theory
law
Solar cell
0202 electrical engineering, electronic engineering, information engineering
Inverter
business
Pulse-width modulation
Solar power
Voltage
Subjects
Details
- ISSN :
- 17521424 and 17521416
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- IET Renewable Power Generation
- Accession number :
- edsair.doi...........636a63a5f3639aa6e3b17ff5a1183c69