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Bridgeless Hybrid-Mode Zeta-Based Inverter: Dynamic Modeling and Control
- Source :
- IEEE Transactions on Power Electronics. 36:7233-7249
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- In this article, we present a bridgeless hybrid-mode Zeta inverter for distributed energy systems. We integrate the secondary diode of the conventional unfolding-type Zeta inverter into one of diagonal pairs of the secondary-side switches in a bridgeless Zeta inverter. This structure decreases the number of active power components and provides naturally well distributed loss at the body diodes of the secondary-side switches over one cycle of grid voltage, and as a result, increases both output power transfer and reliability. To attain medium-high power capacity with appropriate size of magnetic components, the bridgeless Zeta inverter operates in both discontinuous conduction mode (DCM) and continuous conduction mode (CCM). However, control of the proposed inverter is difficult because of the distinct system dynamics caused by the operations in DCM and CCM. To deal with this control problem, we first identify the mode boundaries and, corresponding to each mode, develop a dynamic model to design a controller. Then, we propose to use a feedback controller plus a feedforward controller supplemented with a repetitive controller that uses a phase-lead compensator. Experimental results using a 300-W prototype demonstrate the feasibility and effectiveness of the proposed modeling and control approach.
- Subjects :
- Computer science
business.industry
020208 electrical & electronic engineering
Feed forward
Topology (electrical circuits)
02 engineering and technology
AC power
Heat sink
Inductor
law.invention
Capacitor
law
Control theory
Distributed generation
0202 electrical engineering, electronic engineering, information engineering
Inverter
Maximum power transfer theorem
Electrical and Electronic Engineering
business
Diode
Subjects
Details
- ISSN :
- 19410107 and 08858993
- Volume :
- 36
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Power Electronics
- Accession number :
- edsair.doi...........2722a7ff7b3a6e9ade5ff574a2afe0fe