DC Ring-Bus Microgrid Fault Protection and Identification of Fault Location

Park, Jae-Do; Candelaria, Jared; Ma, Liuyan; Dunn, Kerry

doi:10.1109/tpwrd.2013.2267750

Cited by 342 publications

(164 citation statements)

References 33 publications

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“…A line-to-line fault analysis in an LVDC distribution network is proposed in [22]. A fault protection and location scheme for a ring-bus DC microgrid is described in [23,24].…”

Section: Literature Reviewmentioning

confidence: 99%

Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

et al. 2018

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Currently, the Direct-Current (DC) microgrid has been gaining popularity because most electronics devices require a DC power input. A DC microgrid can significantly reduce the AC to DC energy conversion loss. However, a power grid may experience a line fault situation that may damage important household devices and cause a blackout in the power system. This work proposes a new line fault protection scheme for a DC microgrid system by using a battery energy storage system (BESS). Nowadays, the BESS is one of the most cost effective energy storage technologies for power system applications. The proposed system is designed from a distributed wind farm smart grid. A total of three off-shore wind farms provide power to the grid through a high voltage DC (HVDC) transmission line. The DC microgrid was modeled by a BESS with a bi-directional DC-DC converter, various DC-loads with step down DC-DC converters, a voltage source converter, and a voltage source inverter. Details of the control strategies of the DC microgrid are described. During the line fault situation, a transient voltage was controlled by a BESS. From the simulation analyses, it is confirmed that the proposed method can supply stable power to the DC grid, which can also ensure protection of several loads of the DC microgrid. The effectiveness of the proposed system is verified by in a MATLAB/SIMULINK ® environment.

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“…A line-to-line fault analysis in an LVDC distribution network is proposed in [22]. A fault protection and location scheme for a ring-bus DC microgrid is described in [23,24].…”

Section: Literature Reviewmentioning

confidence: 99%

Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

et al. 2018

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“…It is noted that, except the DC-link capacitor current, the other two fault current components flow through the freewheeling diodes; thus, these diodes may get damaged quickly if proper provisions are not put in place [47,49].…”

Section: 23-grid-side Componentmentioning

confidence: 99%

“…DC fault currents, however, do not cross zero point. Moreover, DC systems require a relatively faster protection system capable of operating in several milliseconds to prevent any damage to the freewheeling diodes of VSCs [18,49,62]. Therefore, conventional ACCBs are not suitable for fault current interruption in DC systems.…”

Section: Inadequacy Of Ac Circuit Breakers (Accbs)mentioning

confidence: 99%

Protection of AC and DC distribution systems Embedding distributed energy resources: A comparative review and analysis

Monadi

Zamani

Candela

et al. 2015

Renewable and Sustainable Energy Reviews

125

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“…Moreover, the necessity of a relatively faster protection scheme makes it impossible to obtain useful data for fault location from the voltage and current waveforms [7,12]. This aspect also makes it difficult to use fault detection methods with time consuming calculations.…”

Section: Introductionmentioning

confidence: 99%

Centralized Protection Strategy for Medium Voltage DC Microgrids

Monadi

Gavriluţă

Luna

et al. 2017

IEEE Trans. Power Delivery

157

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Abstract-1 This paper presents a centralized protection strategy for medium voltage dc (MVDC) microgrids. The proposed strategy consists of a communication-assisted fault detection method with a centralized protection coordinator and a fault isolation technique that provides an economic, fast, and selective protection by using the minimum number of dc circuit breakers (DCCBs). The proposed method is also supported by a backup protection which is activated if communication fails. The paper also introduces a centralized self-healing strategy that guarantees successful operation of zones that are separated from the main grid after the operation of the protection devices. Furthermore, to provide a more reliable protection, thresholds of the protection devices are adapted according to the operational modes of the microgrid and the status of distributed generators (DGs). The effectiveness of the proposed protection strategy is validated through real-time simulation studies based on the hardware in the loop (HIL) approach.Index Terms-Adaptive protection, centralized protection, smart dc microgrids. I. INTRODUCTIONDue to the increasing penetration of DGs, especially in the form of renewable energy systems (RES), the concept of microgrids has been proposed as a method for DG integration into the electrical grids. Microgrid is a common concept in both ac and dc systems and is defined as a smallscale low or medium voltage grid consisting of loads and DGs. Such a system is capable of operating in both islanded and grid-connected modes [1]. Because of the advantages of the dc networks over the ac grids, and also because of the new developments in the technology of voltage source converters (VSCs), nowadays there is a major interest in dc grids in both research and industrial realms [2][3][4][5].At the present moment, protection is one of the most important challenges in the development of dc microgrids. Protection issues mainly arise due to the particular behavior of the fault current in VSC-based networks [6]. When a fault occurs in a dc grid, firstly, the dc-link capacitor is discharged causing the voltage of the main dc bus to drop precipitously. Then, the energy stored in the cable This work was supported in part by the Spanish Ministry of Economy and Competitiveness under Project ENE2013-48428-C2-2-R. The work of M. Monadi was supported by the Ministry of Science, Research, and Technology, Iran.M. Monadi is with Technical University of Catalonia (UPC) Barcelona, Spain and Shahid Chamran University of Ahvaz, Ahvaz, Iran (e-mail: meh_monadi@yahoo.com).C. Gavriluta is with the Grenoble Electrical Engineering Laboratory (G2ELab), France (email: catalin.gavriluta@g2elab.grenoble-inp.fr).A. Luna, J. I. Candela are with Technical University of Catalonia (UPC) Barcelona, Spain. (e-mails: luna@ee.upc.edu, candela@ee.upc.edu) P. Rodriguez is with Technical University of Catalonia (UPC) Barcelona, Spain and Abengoa research, Sevilla, Spain (e-mail: prodriguez@ee.upc.edu).inductance is also discharged through the freewheeling dio...

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DC Ring-Bus Microgrid Fault Protection and Identification of Fault Location

Cited by 342 publications

References 33 publications

Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

Protection of AC and DC distribution systems Embedding distributed energy resources: A comparative review and analysis

Centralized Protection Strategy for Medium Voltage DC Microgrids

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