Fault protection solutions appropriately used for ungrounded low-voltage AC microgrids

Autor: Duong Minh Bui, Shi-Lin Chen, Jheng-Lun Jiang, Keng-Yu Lien
Rok vydání: 2015
Předmět:
Zdroj: 2015 IEEE Innovative Smart Grid Technologies - Asia (ISGT ASIA).
DOI: 10.1109/isgt-asia.2015.7387064
Popis: This paper proposes possible fault protection solutions for an ungrounded AC microgrid (MG) based on a review on existing microgrid protection solutions in recent years. A generalized fault protection system of ungrounded low-voltage (LV) AC microgrids is divided into six individual protection zones including: (i) protection of distributed generators (DGs) and energy storage devices; (ii) protection of isolation and distribution transformers; (iii) protection of power converters; (iv) protection of inverter-based DG and rotating-based DG branches; (v) protection of load branches; and (vi) protection of AC trunk lines and common buses. Advantages and shortcomings of available fault protection schemes for each different MG protection zone are analysed in the paper.
Databáze: OpenAIRE