TY - GEN
T1 - Design and Performance Evaluation of the Modular Multilevel Converter (MMC)-based Grid-tied PV-Battery Conversion System
AU - Zhang, Lei
AU - Zhang, Zhengda
AU - Qin, Jiangchao
AU - Shit, Di
AU - Wang, Zhiwei
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/12/3
Y1 - 2018/12/3
N2 - 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.
AB - 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.
KW - Ac-dc grid interconnection
KW - Battery energy storage system (BESS)
KW - Medium-voltage grid
KW - Modular multilevel converter (MMC)
KW - PV-Battery conversion system
KW - Photovoltaic (PV)
KW - Transformerless
UR - http://www.scopus.com/inward/record.url?scp=85060315597&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060315597&partnerID=8YFLogxK
U2 - 10.1109/ECCE.2018.8558443
DO - 10.1109/ECCE.2018.8558443
M3 - Conference contribution
AN - SCOPUS:85060315597
T3 - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
SP - 2649
EP - 2654
BT - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Y2 - 23 September 2018 through 27 September 2018
ER -