Coordinated Protection Scheme Based on Virtual Impedance Control for Loop-Based Microgrids

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KARIMI HAMED; FANI BAHADOR; SHAHGHOLIAN GHAZANFAR

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Journal: Journal of Intelligent Procedures in Electrical Technology Year:2021 | Volume:12 | Issue:46 Page(s): 15-32

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Information Journal Paper

Title

Coordinated Protection Scheme Based on Virtual Impedance Control for Loop-Based Microgrids

Author(s)

KARIMI HAMED | FANI BAHADOR | SHAHGHOLIAN GHAZANFAR | Issue Writer Certificate

Keywords

loop microgridQ1

distributed generationQ1

protective coordinationQ1

overcurrent relayQ1

virtual impedanceQ1

Abstract

The presence of the inverter distributed generations in the power systems can bring about incoord-ination in the protection system performance while enjoying various advantages. In this paper, a suit-able solution, independent of relay settings, is presented in order to solve the protection problems of inverter island microgrids with circular arrangement. The presence of distributed inverter generation sources causes a change in the direction and amplitude of the fault current at the microgrid level. This problem is more visible in microgrids with circular arrangement. Therefore, conventional protection schemes that consider a single path and a high fault current level compared to load current may be problematic. An important factor for the proper design of a protective system for microgrids is the contribution of the injecting fault current of the inverter sources. In this paper, a protection strategy based on the inverter control of sources is presented and ordinary overcurrent relays with the same characteristic curve are used. When a short circuit fault occurs in the microgrid, an adaptive current limiting strategy is applied using the virtual impedance loop. In this case, the share of fault current of each source is controlled according to the position of the fault, and sources closer to the fault produce a larger fault current. Therefore, the current passing through the protective equipment is closer to the fault than other equipment in the micro grid. And without the need for making connection between protective equipment, the protective coordination is guaranteed.

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APA: Copy

KARIMI, HAMED, FANI, BAHADOR, & SHAHGHOLIAN, GHAZANFAR. (2021). Coordinated Protection Scheme Based on Virtual Impedance Control for Loop-Based Microgrids. JOURNAL OF INTELLIGENT PROCEDURES IN ELECTRICAL TECHNOLOGY, 12(46 ), 15-32. SID. https://sid.ir/paper/391749/en

Vancouver: Copy

KARIMI HAMED, FANI BAHADOR, SHAHGHOLIAN GHAZANFAR. Coordinated Protection Scheme Based on Virtual Impedance Control for Loop-Based Microgrids. JOURNAL OF INTELLIGENT PROCEDURES IN ELECTRICAL TECHNOLOGY[Internet]. 2021;12(46 ):15-32. Available from: https://sid.ir/paper/391749/en

IEEE: Copy

HAMED KARIMI, BAHADOR FANI, and GHAZANFAR SHAHGHOLIAN, “Coordinated Protection Scheme Based on Virtual Impedance Control for Loop-Based Microgrids,” JOURNAL OF INTELLIGENT PROCEDURES IN ELECTRICAL TECHNOLOGY, vol. 12, no. 46 , pp. 15–32, 2021, [Online]. Available: https://sid.ir/paper/391749/en

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