A Study on Energy Management and Cooperative Control Considering LVRT in a Hybrid Microgrid

Chang-Gyun An, Hoon Lee, Tae-Gyu Kim, Junsin Yi and Chung-Yuen Won ()
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Chang-Gyun An: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
Hoon Lee: Hyundai Mobis, 17-2, Mabuk-ro 240beon-gil, Giheung-gu, Yongin-si 16891, Republic of Korea
Tae-Gyu Kim: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
Junsin Yi: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
Chung-Yuen Won: Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea

Energies, 2023, vol. 16, issue 11, 1-26

Abstract: Recently, the establishment of technical standards for grid connection has gained interest in academia and industry. These standards have focused on the reactive power control function of the grid-connected inverter and maintenance of grid operation, and include detailed information about the grid support function. However, remote control communication and control devices for grid support functions, and other distributed sources, such as wind power and energy storage systems, other than inverters have not been addressed. In this paper, the control of the interlinking converter (ILC) in a hybrid microgrid considering low voltage ride-through (LVRT) among grid support functions is investigated. The proposed method consists of an energy management system considering LVRT and a cooperative control scheme. In the energy management system, an algorithm capable of mode selection was constructed by applying the LVRT curve. Then, considering the LVRT situation, the allowable reactive power range of the ILC was mathematically analyzed through the cooperative control of the energy storage device and the ILC. The proposed method enables us to perform active and reactive power control of the ILC in a hybrid distribution network, considering the power factor under various conditions. This functionality, such as supplying reactive power, significantly contributes to the enhanced grid resilience with distributed power sources, including renewable energy. The proposed strategies were verified through experiments after configuring an experimental set of distributed power sources.

Keywords: hybrid AC/DC microgrid; low voltage ride-through; energy management; cooperative control; interlinking converter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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