Smart grids concept in electrical distribution system

Popovic, N Zeljko; Radmilovic, B Bratislava; Gacic, M Vladan

doi:10.2298/tsci120124072p

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…The above objective function is therefore subjected to the equality constraints given by eq. 1and (2) and inequality constraints given by eq. 7, (10) and 11…”

Section: Strategy S1mentioning

confidence: 99%

“…Additionally, micro-grids enable some other important benefits as they can change the role of the end-users in electricity systems from the passive to the active one. Popović et al in [2] define some business processes in distribution networks as well as key elements that should be (re)defined in order to enable the goal of smart grid concept.…”

Section: Introductionmentioning

confidence: 99%

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Energy management strategies for combined heat and electric power micro-grid

Barbarić

Lončar

2016

THERM SCI

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The increasing energy production from variable renewable energy sources such as wind and solar has resulted in several challenges related to the system reliability and efficiency. In order to ensure the supply-demand balance under the conditions of higher variability the micro-grid concept of active distribution networks arising as a promising one. However, to achieve all the potential benefits that micro-grid concept offer, it is important to determine optimal operating strategies for micro-grids. The present paper compares three energy management strategies, aimed at ensuring economical micro-grid operation, to find a compromise between the complexity of strategy and its efficiency. The first strategy combines optimization technique and an additional rule while the second strategy is based on the pure optimization approach. The third strategy uses model based predictive control scheme to take into account uncertainties in renewable generation and energy consumption. In order to compare the strategies with respect to cost effectiveness, a residential micro-grid comprising photovoltaic modules, thermal energy storage system, thermal loads, electrical loads as well as combined heat and power plant, is considered.

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“…The above objective function is therefore subjected to the equality constraints given by eq. 1and (2) and inequality constraints given by eq. 7, (10) and 11…”

Section: Strategy S1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy management strategies for combined heat and electric power micro-grid

Barbarić

Lončar

2016

THERM SCI

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“…For the electricity networks in particular, a future smart network serving as a dynamic network for two-way energy flows is intended to link widely dispersed micro-level renewable energy sources at the customer level and large scale energy sources providing more dynamic information to customers, thus facilitating greater customer choice about energy source and level of consumption and providing realtime information on the performance of the network and optimising the network operations. Delivery of these objectives will contribute significantly to the objectives of reducing greenhouse gas emissions and enhancing energy security, [1,2].…”

Section: Introductionmentioning

confidence: 99%

Impact of stand-by energy losses in electronic devices on smart network performance

Mandic-Lukic¹,

Pantovic²,

Vasiljević³

2012

THERM SCI

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Limited energy resources and environmental concerns due to ever increasing energy consumption, more and more emphasis is being put on energy savings. Smart networks are promoted worldwide as a powerful tool used to improve the energy efficiency through consumption management, as well as to enable the distributed power generation, primarily based on renewable energy sources, to be optimally explored. To make it possible for the smart networks to function, a large number of electronic devices is needed to operate or to be in their stand-by mode. The consumption of these devices is added to the consumption of many other electronic devices already in use in households and offices, thus giving rise to the overall power consumption and threatening to counteract the primary function of smart networks. This paper addresses the consumption of particular electronic devices, with an emphasis placed on their thermal losses when in stand-by mode and their total share in the overall power consumption in certain countries. The thermal losses of electronic devices in their stand-by mode are usually neglected, but it seems theoretically possible that a massive increase in their number can impact net performance of the future smart networks considerably so that above an optimum level of energy savings achieved by their penetration, total consumption begins to increase. Based on the current stand-by energy losses from the existing electronic devices, we propose that the future penetration of smart networks be optimized taking also into account losses from their own electronic devices, required to operate in stand-by mode

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