DC Technologies: Solutions to Electric Power System Advancements [Guest Editorial]

Reed, Gregory F.

doi:10.1109/mpe.2012.2212604

Cited by 35 publications

(24 citation statements)

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“…Supplying these loads through the predominant AC distribution systems adds conversion stages and consequently, adds inefficiencies to the delivery chain. According to [13], nearly 30% of the generated AC power passes through a power electronic converter before it is utilized. The amount of lost energy varies, but generally it lies within the range of 10-25% [14].…”

Section: Loadsmentioning

confidence: 99%

DC microgrids and distribution systems: An overview

Elsayed

Mohamed

Mohammed

2015

Electric Power Systems Research

506

211

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Section: Loadsmentioning

confidence: 99%

DC microgrids and distribution systems: An overview

Elsayed

Mohamed

Mohammed

2015

Electric Power Systems Research

506

211

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“…solar panels, electric vehicles, energy storages and consumer electronics are increased during the last few years. Nearly 80 % of all power generated pass through a power electronics within the next 15 years and most of this occur at low voltage level [26]. The total losses of the LVDC distribution network would be decreased due to decreased number of conversion stages compared to the presented configurations if the electric devices would be connected directly to the DC network through DC/DC converters [10][11][12].…”

Section: Efficiency Of Lvdc Distribution Network Supplied By One Convmentioning

confidence: 99%

Effect of network configuration and load profile on efficiency of LVDC distribution network

Rekola

Jokipii

Suntio

2014

2014 16th European Conference on Power Electronics and Applications

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The low voltage direct current (LVDC) distribution network is a promising solution to be considered in future smart grids. For facilitating the design of cost effective LVDC distribution networks, the total losses of the network with different configurations are evaluated and compared. The possibility to connect the customer loads asymmetrically, when the bipolar DC network is used and the fact that the customer has single-phase loads, which lead to phase-asymmetrical loading of a three-phase converter, are taken into account. According to the results presented in this paper, the highest efficiency is achieved when the ungrounded LVDC distribution network is supplied by two series connected line converters. When the length of the bipolar network is 600 m at maximum, three-phase load converters should be connected to 750 V DC with a 400V/400V isolation transformer. Instead, while the length of the DC network is over 600 m, the maximum efficiency is achieved when the unipolar network configuration is used by connecting the load converters to 1500 V DC with a 800V/400V isolation transformer.

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“…The DC distribution grid is a promising grid infrastructure interfacing a range of electronic loads including plug-in hybrid electric vehicles (PHEVs) [1] and distributed renewable generations. For a DC grid installed with PV generations, battery energy storage system (BESS) is usually applied to buffer the intermittent solar generations.…”

Section: Introductionmentioning

confidence: 99%

A Configuration of Storage System for DC Microgrids

Wang

Tan

Lee

et al. 2018

IEEE Trans. Power Electron.

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Abstract-Battery energy storage systems (BESS) are often adopted to buffer the difference between the intermittent solar power and the load demand in power grids. The costs of such PVbattery systems increase as the required energy storage increases. In this paper, a new configuration comprising the photovoltaic (PV) panels, a series DC electric spring (series ES) and a noncritical load is proposed to reduce the battery storage capacity of DC microgrids that have substantial PV installations. This arrangement forms a PV-embedded series DC electric spring (PVES). An optimization method considering the minimization of electricity bills of the DC microgrids is included to size the storage capacity and to determine the rating of the PV that are connected to the series ES. Experiments on a 48 V isolated DC grid and simulations on a 400 kVA grid-connected DC microgrid have been conducted to verify the storage reduction feature of the PVES. Both sets of results show that the PVES can tackle the intermittency of the solar power with a smaller storage capacity than that typically required in DC grids with PV installations.

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DC Technologies: Solutions to Electric Power System Advancements [Guest Editorial]

Cited by 35 publications

References 0 publications

DC microgrids and distribution systems: An overview

DC microgrids and distribution systems: An overview

Effect of network configuration and load profile on efficiency of LVDC distribution network

A Configuration of Storage System for DC Microgrids

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