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Optimal Modulation and DM Filter Design for a High Switching Frequency Single-Stage Microinverter

Conference · · 2023 IEEE Applied Power Electronics Conference and Exposition (APEC)
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  1. Institute for Systems Research, University of Maryland,Maryland Power Electronics Laboratory,Department of Electrical and Computer Engineering,USA
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This paper presents an optimal modulation and systematic filter design approach for a single-stage dual-active-bridge (DAB) based dc-ac microinverter to achieve improved differential-mode (DM) noise performance for electromagnetic interference (EMI) tests. As DM filters contribute significantly to the overall converter volume, the main objective of this work is to leverage the degrees of freedom in the DAB converters to effectively attenuate the EMI noise. In addition, the DM filter design method needs to ensure near unity power factor converter operation. To achieve these targets, this paper analyzes three modulation strategies based on fixed or variable switching frequency operation where the different control modulation variables are varied to find the simulated DM noise spectrum. Based on the required DM attenuation, a constrained optimization problem is formulated to determine minimal DM filter parameters. Simulation results show that a spread spectrum approach with variable switching frequency is shown to minimize the DM EMI attenuation effort by spreading the noise profile. A fully GaN 400 W hardware prototype demonstrated the spread-sprectrum approach.

Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
DOE Contract Number:
EE0008350
OSTI ID:
2007662
Report Number(s):
DOE-UMD-8350-6
Journal Information:
2023 IEEE Applied Power Electronics Conference and Exposition (APEC), Conference: 2023 IEEE Applied Power Electronics Conference and Exposition (APEC), Orlando, FL, USA, 2023
Country of Publication:
United States
Language:
English

References (10)

An Improved Variable Switching Frequency Modulation Strategy for Three-Level converters with Reduced Conducted EMI conference September 2019
Design Optimization for Weighted Conduction Loss Minimization in a Dual-Active-Bridge-Based PV Microinverter conference October 2020
A Comprehensive Design and Optimization of the DM EMI Filter in a Boost PFC Converter journal May 2018
Characterization of Common/Differential-Mode Behavior in Power Electronic Systems conference June 2021
Comparison of CCM- and CRM-Based Boost Parallel Active Power Decoupler for PV Microinverter journal August 2022
Analytical Approach for Common Mode EMI Noise Analysis in Dual Active Bridge Converter conference October 2020
EMI Filter Design for a Three-Phase Buck–Boost Y-Inverter VSD With Unshielded Motor Cables Considering IEC 61800-3 Conducted and Radiated Emission Limits journal November 2021
EMI Filter Design for the Integrated Dual Three-Phase Active Bridge (D3AB) PFC Rectifier journal December 2022
Review of Soft-Switching Topologies for Single-Phase Photovoltaic Inverters journal January 2021
Comprehensive Review and Comparison of Single-Phase Grid-Tied Photovoltaic Microinverters journal June 2020

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Related Subjects

14 SOLAR ENERGY
Dual-active-bridge
microinverter
GaN
modulation
optimization
differential mode (DM)
electromagnetic interference (EMI) filter