Efficient Home Appliances for a Future DC Residence

Rodriguez-Otero, M.A.; O’Neill-Carrillo, Efraín

doi:10.1109/energy.2008.4781006

Cited by 44 publications

(15 citation statements)

References 9 publications

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“…However, expert research on fault detection and protection of DC distribution system has resulted in advanced protection schemes, which are capable of investigating different faults and prove to be effective for DC distribution system with distributed energy sources When DC distribution is carried out through underground cables in urban areas, corrosion is likely to be more compared with AC Though there are different arguments towards the voltage levels and standards, to reach a breakthrough, standardisation of voltage levels is an important step.…”

Section: Challengesmentioning

confidence: 99%

High-gain-high-power (HGHP) DC-DC converter for DC microgrid applications: Design and testing

Revathi

Prabhakar

González-Longatt

2017

Int Trans Electr Energ Syst

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Summary The use of green energy sources to feed direct current (DC) microgrids is gaining prominence over traditional centralised alternating current (AC) systems. Direct current microgrids are characterised by the use of intermediate DC‐DC converter, which acts as power conditioning units. Hence, the choice of an appropriate DC‐DC converter becomes significant as the overall system efficiency is strongly dependent on the converter's performance. This paper proposes a novel high‐gain–high‐power DC‐DC converter for DC microgrid, which is one of the significant steps forward in the development of DC microgrids. The suitability of the proposed high‐gain–high‐power DC‐DC converter is demonstrated by experimental tests of the 60 V/1.1 kV, 3 kW converter; test results validate the converter's suitability for DC distribution. A significant number of performance parameters of the proposed converter are compared with state‐of‐the‐art converter topologies demonstrating the superior capabilities of the proposed converter. This paper also portrays the potential benefits that could be reaped by trending towards DC instead of existing alternating current system. The advantages and challenges to be confronted in the foreseeable future while implementing sustainable DC microgrids are also highlighted. Finally, this paper encapsulates renewable energy fed DC microgrid system as an appropriate, technically feasible, economically viable, and competent solution for efficiently utilising the sustainable energy sources.

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Section: Challengesmentioning

confidence: 99%

High-gain-high-power (HGHP) DC-DC converter for DC microgrid applications: Design and testing

Revathi

Prabhakar

González-Longatt

2017

Int Trans Electr Energ Syst

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“…By using a low voltage DC distribution system in the residence, AC to DC conversions losses can be omitted and the use of comparatively less efficient adapters can be discarded and also there will be no power factor issues [9]. Only highly efficient DC to DC converter will be needed to run some of the DC appliances.…”

Section: Low DC Voltage As a Solutionmentioning

confidence: 99%

“…The majority of the devices used in households or offices only require low power that are possible to be connected directly to the low voltage DC distribution system after removing the AC to DC conversion stage. Most of the commercially available appliances are designed with an input voltage of 12V and 24V and some of the appliances are available at input voltages of 48V [9]. As the low voltage DC appliances have demand of higher currents, it makes feeder losses considerable.…”

Section: Low DC Voltage As a Solutionmentioning

confidence: 99%

Feasibility study on low voltage dc systems using smart meter data

Arafat¹,

Tjernberg²,

Mangold³

2013

22nd International Conference and Exhibition on Electricity Distribution (CIRED 2013)

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The introduction of Smart Meter (SM) is a first stage towards Smart Grid to develop future energy system. The main difference of a SM with a traditional meter is that instead of only showing the current usage on the meter itself, it can also communicate the usage details directly to a Distribution System Operator. In order to make overall reduction in energy consumption, increasing awareness about the energy consumption is an important factor. The SM data gives that facility by visualizing the energy consumption in real time. The energy consumption can also be reduced by using low voltage Direct Current (DC) distribution in houses and offices. Several factors have increased the recent interest in DC power system. The number of devices that operate on DC continues to increase in both homes and offices. Most of the devices require Alternating Current (AC) to DC conversion between the AC supply and the DC side of the device. These need of conversion from 230V AC to low voltage DC inside the DC power consuming apparatus results in a low overall efficiency of the AC system. This work focused on feasibility of using 230V AC to 48V DC converter with SM for a house with low voltage DC distribution system.

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“…The DC also enjoys numerous other advantages over the AC system, one of the significant being the reduced number of converters at each power conversion legs and better efficiency in comparison with AC grid. If the solar DC output voltage is fed straight to these device appliances, the conversation stages are reduced from three stage DC-AC-DC to two stage DC-DC when solar PVs and fuel cells are interconnected with DC microgrids [11][12][13][14][15]. Additionally, the lack of reactive power decreases the current required to pass the equal magnitude of energy [16] and also mitigates the issues of skin effect, power factor and harmonics [17].Studies conducted on DC distribution systems in various residences located in various locations and different topologies in the United States showed that energy savings estimation can be up to 5% in case of a non-storage system and up to 14% for a system using storage [18,19].…”

Section: Introductionmentioning

confidence: 99%

DC Grid for Domestic Electrification

et al. 2019

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Various statistics indicate that many of the parts of India, especially rural and island areas have either partial or no access to electricity. The main reason for this scenario is the immense expanse of which the power producing stations and the distribution hubs are located from these rural and distant areas. This emphasizes the significance of subsidiarity of power generation by means of renewable energy resources. Although in current energy production scenario electricity supply is principally by AC current, a large variety of the everyday utility devices like cell phone chargers, computers, laptop chargers etc. all work internally with DC power. The count of intermediate energy transfer steps are significantly abridged by providing DC power to mentioned devices. The paper also states other works that prove the increase in overall system efficiency and thereby cost reduction. With an abundance of solar power at disposal and major modification in the area of power electronic conversion devices, this article suggests a DC grid that can be used for a household in a distant or rural area to power the aforementioned, utilizing Solar PV. A system was designed for a household which is not connected to the main grid and was successfully simulated for several loads totaling to 250 W with the help of an isolated flyback converter at the front end and suitable power electronic conversion devices at each load points. Maximum abstraction of operational energy from renewable sources at a residential and commercial level is intended with the suggested direct current systems.

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Efficient Home Appliances for a Future DC Residence

Cited by 44 publications

References 9 publications

High-gain-high-power (HGHP) DC-DC converter for DC microgrid applications: Design and testing

High-gain-high-power (HGHP) DC-DC converter for DC microgrid applications: Design and testing

Feasibility study on low voltage dc systems using smart meter data

DC Grid for Domestic Electrification

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