Fault detection and isolation in a DC microgrid using a central processing unit

Madingou, Grace; Zarghami, Mahyar; Vaziri, M.

doi:10.1109/isgt.2015.7131858

Cited by 33 publications

(15 citation statements)

References 4 publications

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“…So, the fault detection process in this kind of system is a bit challenging task. Again, during the second ground fault, the IT grounding system contributes towards LL fault with high fault currents and also threatens the personal safety and security …”

Section: Challenges Towards the Protection Of Microgridmentioning

confidence: 99%

“…Again, during the second ground fault, the IT grounding system contributes towards LL fault with high fault currents and also threatens the personal safety and security. 38 Additionally, false tripping is a common problem in DC microgrid because of capacitance in load. 39 So, the major issue occurred when the circuit breaker is open during the capacitive discharge and a highly inductive system is closed during a fault.…”

Section: Groundingmentioning

confidence: 99%

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Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

2020

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Summary The integration of distributed energy resources (DERs) with conventional systems emerges as an intelligent solution for providing uninterrupted and secure power even at times of high load demand. Better load management with a mature fault handling mechanism makes AC a viable option which has an efficiency of 78.24%. In contrast with less power loss and slightly better efficiency of 84.6%, DC microgrid is a reliable option in a low power environment. In order to accommodate all operating conditions and load types, a hybrid system can be designed with a theoretical efficiency of more than 90%. Bidirectional power flows, low inertia, the transition between different modes of operations are the challenges for the protection of alternating current (AC) and direct current (DC) microgrid systems. Power balance fluctuation, absence of zero‐crossing currents, selection of suitable grounding, and coordination between different rating devices restrict the hybrid system to achieve the said efficiency constantly. This paper reviews in detail of existing protection along with grid‐connected algorithms for both modes of operation. Finally, the limitation, major hurdles, and future course of action for a reliable, efficient, and secure hybrid grid system are figured out.

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Section: Challenges Towards the Protection Of Microgridmentioning

confidence: 99%

Section: Groundingmentioning

confidence: 99%

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

2020

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“…Detection, location and isolation of DC fault are three key aspects to be considered while designing a protection scheme for DC relays. During the design process, the specifications of bus configurations and earthing schemes has to be considered [49,[87][88][89][90][91][92]. In this section, a review of DC microgrid protection schemes is carried out with respect to their capability and performance in these key aspects.…”

Section: Fault Detection Location and Isolationmentioning

confidence: 99%

System Configuration, Fault Detection, Location, Isolation and Restoration: A Review on LVDC Microgrid Protections

et al. 2019

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Low voltage direct current (LVDC) distribution has gained the significant interest of research due to the advancements in power conversion technologies. However, the use of converters has given rise to several technical issues regarding their protections and controls of such devices under faulty conditions. Post-fault behaviour of converter-fed LVDC system involves both active converter control and passive circuit transient of similar time scale, which makes the protection for LVDC distribution significantly different and more challenging than low voltage AC. These protection and operational issues have handicapped the practical applications of DC distribution. This paper presents state-of-the-art protection schemes developed for DC Microgrids. With a close look at practical limitations such as the dependency on modelling accuracy, requirement on communications and so forth, a comprehensive evaluation is carried out on those system approaches in terms of system configurations， fault detection, location, isolation and restoration.

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“…Comparatively, SSCB-based protection methods can provide high-speed protection (few µs) schemes to prevent the high initial cost and occupation of large spaces [29]. The SSCBs are embedded into two useful major categories in protection system devices: (i) semiconductor current limiters, and (ii) semiconductor breakers [30]. The SSCBs consist of semiconductor switches (IGBT, MOSFET, etc.).…”

Section: Semiconductor Breakers and Operation Principle Of The Proposmentioning

confidence: 99%

Low-Voltage Solid-State DC Breaker for Fault Protection Applications in Isolated DC Microgrid Cluster

et al. 2019

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Due to the interconnected scheme of multiple components, such as distributed generators, storage systems, and loads through converters to a common bus in DC microgrids, the possibility of fault occurrence is increasing significantly. Meanwhile, due to the huge and rapid increase of short-circuit currents, the development of a small- and large-scale DC system requires a reliable and fast protection system to ensure fault clearance and maintain safety for the rest of the system. Thus, fault protection has been focused on as one of the most critical issues in a direct current network. The application of traditional circuit-breakers for DC fault protection has the drawback of slow operation, which requires a high rating power equipment. Recently, the high speed and excellent performance capabilities of semiconductor breakers have attracted a lot of attention and been considered as an optimal solution for fast DC fault interruption. In this study, a bidirectional Insulated-Gate Bipolar Transistor (IGBT) semiconductor breaker, suitable for the fault protection of low-voltage DC networks, is proposed. The operating characteristics of this breaker are based on changes in the circuit current and terminal voltage of IGBTs. It detects the abrupt change of the terminal voltage as an abnormal condition and isolates the faulted branch in a short time to prevent the operation disturbance in the healthy part of the network. Therefore, for the entire protection of a typical 400V DC-microgrid cluster, breakers need to be integrated and examined in each branch and the interconnected lines. The proposed protection method in this study is examined in a Simulink®/MATLAB environment to analyze and assess its operation.

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Fault detection and isolation in a DC microgrid using a central processing unit

Cited by 33 publications

References 4 publications

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

System Configuration, Fault Detection, Location, Isolation and Restoration: A Review on LVDC Microgrid Protections

Low-Voltage Solid-State DC Breaker for Fault Protection Applications in Isolated DC Microgrid Cluster

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