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Design and Implementation of an Integrated Control Scheme for GaN-Based Multiple Power Converters
Chao-Tsung Ma1, Bing-Hong Yao1
1Applied Power Electronics Systems Research Group, Department of EE, CEECS, National United University, Miaoli City 36063, Taiwan.
Micromachines
|July 8, 2023
Summary
This study presents an integrated control scheme for Gallium Nitride (GaN)-based power converters in renewable energy systems. The novel approach uses a single digital signal processor (DSP) for reliable, cost-effective, and multifunctional power interfaces.
Area of Science:
- Electrical Engineering
- Renewable Energy Systems
- Power Electronics
Background:
- The global energy landscape necessitates robust electric power grids and new energy industries through renewable energy (RE)-based distributed generation (DG) and smart micro-grids.
- Hybrid power systems integrating AC and DC grids require advanced power conversion interfaces using wide band gap (WBG) semiconductors and sophisticated control strategies.
- Variability in RE generation demands effective energy storage, real-time power flow regulation, and intelligent control for promoting DG and micro-grid systems.
Purpose of the Study:
- To investigate an integrated control scheme for multiple Gallium Nitride (GaN)-based power converters in grid-connected RE systems.
- To present the first complete design case integrating three GaN-based power converters with diverse control functions onto a single digital signal processor (DSP) chip.
- To achieve a reliable, flexible, cost-effective, and multifunctional power interface for renewable power generation.
Main Methods:
- Developed a coordinated control scheme for a system including photovoltaic (PV) generation, battery energy storage, and a grid-connected inverter.
- Implemented two typical operating modes and advanced power control functions based on system conditions and battery state of charge (SOC).
- Designed and implemented hardware for GaN-based power converters and digital controllers, verified through simulations and experimental tests on a 1-kVA system.
Main Results:
- Demonstrated a fully digital and coordinated control scheme for managing multiple GaN-based converters.
- Successfully integrated three distinct GaN-based power converters onto a single DSP chip.
- Verified the feasibility and effectiveness of the control scheme and hardware through simulation and experimental validation on a 1-kVA system.
Conclusions:
- The proposed integrated control scheme offers a reliable, flexible, and cost-effective solution for RE-based power systems.
- Utilizing GaN power converters and a unified DSP control platform enhances the performance and multifunctionality of power interfaces.
- The study validates the practical implementation and effectiveness of advanced digital control strategies for smart micro-grids and renewable energy integration.
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