NDLI: Overcurrent protection for inverter-based distributed generation system

Content Provider	IEEE Xplore Digital Library
Author	Xuejun Pei Zhi Chen Shunchao Wang Yong Kang
Copyright Year	2015
Description	Author affiliation: State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China (Xuejun Pei; Zhi Chen; Shunchao Wang; Yong Kang)
Abstract	Microgrids can provide various economic and environmental benefits but their implementation poses great technical challenges in control, protection and energy management. One of the most important technical aspects in microgrids is distribution system protection. This paper proposes an overcurrent protection strategy for microgrid consisting of only inverter-based distributed generation (IBDG) in islanded operation mode. On the basis of protecting semiconductor devices from damage once a short circuit fault occurs at the distribution line, a “short circuit impedance versus fault current $(Z_{f}-I_{f})”$ droop mechanism is introduced in the current-limiting controller to imitate the characteristic of power system short circuit current, which benefits the adoption of conventional overcurrent protection principle. Through using the microprocessor-based relay, a two-segment current protection algorithm is applied to guarantee the selectivity, rapidity and reliability of the protection system. The proposed protection method can provide a reference for the future microgrid protection. Experiments have been carried out to verify the feasibility of the proposed scheme.
Starting Page	2328
Ending Page	2332
File Size	1229048
Page Count	5
File Format	PDF
e-ISBN	9781467371513
DOI	10.1109/ECCE.2015.7309987
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-20
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Two-segment Limiting Islanded operation mode Short circuit current Microgrids Droop control Inverters Circuit faults Relays Fault currents Short-circuit currents Microprocessor-based relay IBDG Overcurrent protection
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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