Protection of Low-Voltage DC Microgrids

Salomonsson, Daniel; Söder, Lennart; Sannino, A.

doi:10.1109/tpwrd.2009.2016622

Cited by 638 publications

(363 citation statements)

References 23 publications

Supporting

Mentioning

328

Contrasting

Unclassified

Order By: Relevance

“…Conventional LVdc protection categories are utility, converter, distributed generation unit, feeder and bus-bar [26]. In a conventional LVdc, where the system capacitor is large, bus-bar protection is the main concern as the other protection categories can be easily incorporated with in the PEI.…”

Section: F Protection Strategymentioning

confidence: 99%

“…For conventional LVdc, commercially available dc protection devices can be used like molded-case circuit breakers, fast static switches [27]. Fuse is possible but it needs an overrated design of source PEI [26] to have high current for generating enough heat. A smart solution with fast detection and isolation mechanism for high impedance faults can be designed and easily achieved for conventional LVdc.…”

Section: F Protection Strategymentioning

confidence: 99%

See 1 more Smart Citation

From DC nano- and microgrids towards the universal DC distribution system - a plea to think further into the future

Mackay

Hailu

Mouli

et al. 2015

2015 IEEE Power &Amp; Energy Society General Meeting

View full text Add to dashboard Cite

Section: F Protection Strategymentioning

confidence: 99%

Section: F Protection Strategymentioning

confidence: 99%

From DC nano- and microgrids towards the universal DC distribution system - a plea to think further into the future

Mackay

Hailu

Mouli

et al. 2015

2015 IEEE Power &Amp; Energy Society General Meeting

View full text Add to dashboard Cite

“…A low-voltage DC system can be either ungrounded, high resistance grounded or low resistance grounded. [93].…”

Section: Comparison Between Ac and DC Systemsmentioning

confidence: 99%

Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

Viitanen

Halonen

2014

Journal of Renewable and Sustainable Energy

View full text Add to dashboard Cite

Ene rgy e ffic ie nt l igh t ing syst e ms in buil dings w it h int e grat e d ph o t o vo l t aic s J a nne V i i t a ne n D O C T O R A L D I S S E R T A T I O N SAalto University publication series DOCTORAL DISSERTATIONS 18/2015 Energy efficient lighting systems in buildings with integrated photovoltaics Janne Viitanen A doctoral dissertation completed for the degree of Doctor of Science (Technology) to be defended, with the permission of the Aalto University School of Electrical Engineering, at a public examination held at the lecture hall S1 of the school on 6 March 2015 at 12. Aalto University School of Electrical Engineering Department of Electrical Engineering and Automation Lighting Unit AbstractThe goal of this thesis was to study how a building integrated photovoltaic system, choice of lighting technology and the selected system voltage affect the energy efficiency of an office building. The quality of the lighting was considered also, as it is essential that users accept the lighting.The energy production of photovoltaic system (PV) was evaluated in Southern Finland through onsite PV measurements from several different compass points and tilt angles during 2010-2013. Based on the measurements, the PV system was sized to provide energy for lighting and office appliances. The energy efficiency of the devices had considerable effect on the sizing of the PV system. The seasonal variations in the PV production were considerable, as only few per cent of the summer time insolation was available during the winter.The energy efficiency and quality of lighting was studied. Fluorescent lighting (FL) and LED lighting were compared, as they are the most used options in offices today. Lighting measurements and a user study was conducted. Different illuminance levels and correlated colour temperatures (CCT) were studied. The studied parameters included glare, reading task performance, identification of detail, colour naturalness and pleasantness, illuminance level sufficiency and pleasantness, pleasantness of the lighting in general and naturalness of the shadows. The subjects also set their own preferred illuminance levels and CCTs. No major differences were found in the subjective preferences at equal illuminance levels between luminaire types. On average, an illuminance level around 600 lx and a CCT around 4000 K were preferred. LEDs were found more energy efficient than FLs and the difference increased when the luminaires were dimmed.In the last part of the research the electricity consumption of an office building was compared with system voltages 12 VDC, 24 VDC, 48 VDC and 230 VAC through computer simulations in a Matlab-Simulink environment. It was found that 230 VAC was the most energy efficient option as a general system voltage, with the selected components and system variables. The 24 VDC was the most energy efficient option with fluorescent lighting and the 48 VDC with LED lighting, if only the lighting system was considered. Aurinkosähkön tuotantoa Etelä-Suomessa tutkittiin mittausten avulla eri il...

show abstract

“…3 depicts a typical structure of power electronics based LVDC microgrids. Several research works have discussed the operation and control of dc microgrids, including system voltage controls [18], different operational scenarios, and the transitions between grid-connected and islanded modes [13], as well as DC microgrid protection schemes [19]. Moreover, the feasibility of a DC distribution network is analyzed systematically in [20].…”

Section: Microgrid Configurationsmentioning

confidence: 99%

A Review of Power Electronics Based Microgrids

Wang¹,

Guerrero²,

Blaabjerg³

et al. 2012

Journal of Power Electronics

152

View full text Add to dashboard Cite

The increased penetration of Distributed Energy Resources (DER) is challenging the entire architecture of conventional electrical power system. Microgrid paradigm, featuring higher flexibility and reliability, becomes an attractive candidate for the future power grid. In this paper, an overview of microgrid configurations is given. Then, possible structure options and control methods of DER units are presented, which is followed by the descriptions of system controls and power management strategies for AC microgrids. Finally, future trends of microgrids are discussed pointing out how this concept can be a key to achieve a more intelligent and flexible power system.

show abstract

Protection of Low-Voltage DC Microgrids

Cited by 638 publications

References 23 publications

From DC nano- and microgrids towards the universal DC distribution system - a plea to think further into the future

From DC nano- and microgrids towards the universal DC distribution system - a plea to think further into the future

Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

A Review of Power Electronics Based Microgrids

Contact Info

Product

Resources

About