A novel sensitivity analysis for optimal design of superconductive fault current limiter in microgrids
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ORIGINAL PAPER
A novel sensitivity analysis for optimal design of superconductive fault current limiter in microgrids Mohammed Mousa1
· Maziar Babaei1 · Sherif Abdelwahed2
Received: 29 December 2019 / Accepted: 2 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Several studies concluded that installing superconductive fault current limiters (SFCLs) at generators’ sides in microgrid systems (MGSs), at the secondary side of each transformer in the system, at each load or at the location with most fault occurrences improve both the reliability and the stability of the system. However, increasing the number of SFCLs in the system leads to an increase in the cost. This paper intents to find the optimal locations and size of SFCLs to improve the stability and the reliability of the studied MGS during a faulty condition by protecting transformers in the system from tripping. The number of SFCLs should be less than the number of transformers which leads to less cost of the initial installations. In order to achieve this goal, this paper presents a novel sensitivity analysis inside a multi-objective optimization method to find the best solution for the optimal location and size of the SFCLs. A line outage distribution factor sensitivity analysis method is utilized to investigate the effect of line outage on the entire system. Also, the effects of each location in the system have been taken into consideration in this study. The results in this paper prove the robustness of the proposed approach which enhances the stability and reliability of the power network while minimizing the required impedance and number of SFCLs. Keywords Line outage distribution factor (LODF) · Superconductive fault current limiter (SFCL) · Microgrid system (MGS) · Sensitivity analysis · Stability · Reliability
1 Introduction Researches about applications of superconductive fault current limiter (SFCL) in microgrid system (MGS) are limited. With all the advantages of renewable energy resources (RERs) in the MGS, the level of fault currents may exceed to a dangerous level [1–3]. There are various devices and techniques are used to protect equipment in the system during the fault condition such as circuit breaker (CB) with higher breaking current, split bus bars, high impedance transformers, and fuses. Unfortunately, these devices may increase the
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Mohammed Mousa [email protected] Maziar Babaei [email protected] Sherif Abdelwahed [email protected]
1
Department of Electrical and Computer Engineering, Mississippi State University, Starkville, MS, USA
2
Department of Electrical and Computer Engineering, Virginia Commonwealth University, Richmond, VA, USA
power loss of the system and they are expensive as reported in [2]. To overcome these issues, researchers have been motivated to study the effectiveness of SFCL on the stability of the power system. Authors in [4,5], state that SFCL might be used to protect equipment in the system during the fault condition and it improves the stability of the syste
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