Design and Performance Evaluation of the Modular Multilevel Converter (MMC)-based Grid-tied PV-Battery Conversion System

Lei Zhang, Zhengda Zhang, Jiangchao Qin, Di Shit, Zhiwei Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

During recent decades, grid-connected photovoltaic (PV) system has been widely investigated. Due to intermittent PV generation, battery energy storage system (BESS) is commonly coordinated with grid-tied PV plant to improve grid-integration performance. Traditionally, the grid-tied PV system integrated with BESS is based on two-level inverters and low interface voltage, which requires bulky line-frequency transformers and passive filters for medium-voltage grid integration. To reduce volume and weight, in this paper, a modular transformerless hybrid PV-BESS conversion system based on modular multilevel converter (MMC) is proposed for medium-voltage grid integration, which integrates distributed PV and battery modules into submodules (SMs). The proposed MMC-based PV-BESS system is designed for a 4.16 kV/1 MVA medium-voltage grid based on various semiconductor devices and passive components. Its functionality, efficiency, and volume of the proposed PV-BESS system are evaluated and compared with the traditional two-level PV-BESS system. The study results show that the proposed solution can significantly reduce overall system volume while keeping high efficiency and providing ac and dc grid interconnection.

Original languageEnglish (US)
Title of host publication2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2649-2654
Number of pages6
ISBN (Electronic)9781479973118
DOIs
StatePublished - Dec 3 2018
Event10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States
Duration: Sep 23 2018Sep 27 2018

Other

Other10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
CountryUnited States
CityPortland
Period9/23/189/27/18

Keywords

  • Ac-dc grid interconnection
  • Battery energy storage system (BESS)
  • Medium-voltage grid
  • Modular multilevel converter (MMC)
  • Photovoltaic (PV)
  • PV-Battery conversion system
  • Transformerless

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Control and Optimization
  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems and Management

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  • Cite this

    Zhang, L., Zhang, Z., Qin, J., Shit, D., & Wang, Z. (2018). Design and Performance Evaluation of the Modular Multilevel Converter (MMC)-based Grid-tied PV-Battery Conversion System. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018 (pp. 2649-2654). [8558443] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2018.8558443