Adaptive Protection Coordination Method Design of Remote Microgrid for Three-Phase Short Circuit Fault
| Autor: | Jae-Eon Kim, Woo-Hyun Kim, Sung-Wook Hwang, Woo-Kyu Chae, Jun-Oh Kim, Jung-Hun Lee |
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| Rok vydání: | 2021 |
| Předmět: |
Technology
Control and Optimization Computer science Energy Engineering and Power Technology Permanent magnet synchronous generator relay Fault (power engineering) short circuit fault law.invention Generator (circuit theory) Electric power system Relay law ESS Voltage source Electrical and Electronic Engineering Engineering (miscellaneous) Renewable Energy Sustainability and the Environment business.industry remote microgrid Electrical engineering Current source renewable energy Microgrid adaptive protection business Energy (miscellaneous) |
| Zdroj: | Energies Volume 14 Issue 22 Energies, Vol 14, Iss 7754, p 7754 (2021) |
| ISSN: | 1996-1073 |
| Popis: | Generally, the fault current supplied by inverter-based renewable energy sources (IBRES) and electrical storage systems (ESS) is about 1.2 to 2 times their rated current and much lower than synchronous generators because the former acts as a current source and the latter acts as a voltage source. A conventional power system in a small island is composed of only synchronous generators and protected from short circuit faults using an overcurrent relay (OCR). However, in the remote microgrid with IBRES, ESS, and synchronous generators, the fault current varies depending on the configuration of generation sources. Namely, the fixed OCR protection method cannot protect microgrids from short circuit faults. This paper proposes an adaptive protection method to protect the microgrid from faults by actively changing the OCR setting according to the state of the generator source combination. A microgrid with ESS and a synchronous generator is modeled and simulated through PSCAD/EMTDC software to validate the proposed adaptive protection method. |
| Databáze: | OpenAIRE |
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