The Experts below are selected from a list of 307014 Experts worldwide ranked by ideXlab platform
Hesam Keshtkar - One of the best experts on this subject based on the ideXlab platform.
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Loss Reduction experiences in electric power distribution companies of Iran
Energy Procedia, 2012Co-Authors: Ali Arefi, Javad Olamaei, Akbar Yavartalab, Hesam KeshtkarAbstract:The experiences of the Loss Reduction projects in electric power distribution companies (EPDCs) of Iran are presented. The Loss Reduction methods, which are proposed individually by 14 EPDCs, corresponding energy saving (ES), Investment costs (IC), and Loss rate Reductions are provided. In order to illustrate the effectiveness and performance of the Loss Reduction methods, three parameters are proposed as energy saving per investment costs (ESIC), energy saving per quantity (ESPQ), and investment costs per quantity (ICPQ). The overall ESIC of 14 EPDC as well as individual average and standard deviation of the EISC for each method is presented and compared. In addition, the average and standard deviation of the ESPQs and ICPQs for the Loss Reduction methods, individually, are provided and investigated. These parameters are useful for EPDCs that intend to reduce the electric Losses in distribution networks as a benchmark and as a background in the planning purposes.
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Loss Reduction planning in electric distribution networks of IRAN until 2025
2011Co-Authors: Ali Arefi, Javad Olamaei, Akbar Yavartalab, M. R. Haghifam, Hesam KeshtkarAbstract:In this paper, a Loss Reduction planning in electric distribution networks is presented based on the successful experiences in distribution utilities of IRAN and some developed countries. The necessary technical and economical parameters of planning are calculated from related projects in IRAN. Cost, time, and benefits of every sub-program including seven Loss Reduction approaches are determined. Finally, the Loss Reduction program, the benefit per cost, and the return of investment in optimistic and pessimistic conditions are introduced.
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Loss Reduction planning in electric distribution networks of IRAN until 2025 [abstract only]
2011Co-Authors: Ali Arefi, Javad Olamaei, Akbar Yavartalab, M. R. Haghifam, Hesam KeshtkarAbstract:In this paper, a Loss Reduction planning in electric distribution networks is presented based on the successful experiences in distribution utilities of IRAN and some developed countries. The necessary technical and economical parameters of planning are calculated from related projects in IRAN. Cost, time, and benefits of every sub-program including seven Loss Reduction approaches are determined. Finally, the Loss Reduction program, the benefit per cost, and the return of investment in optimistic and pessimistic conditions are introduced.
Uwakwe C. Chukwu - One of the best experts on this subject based on the ideXlab platform.
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The Impact of V2G Location on Energy Loss Reduction
2020 Clemson University Power Systems Conference (PSC), 2020Co-Authors: Uwakwe C. ChukwuAbstract:The entry of V2G (Vehicle to Grid) into the distribution system has resulted in several utility and environmental benefits. However, improved utility benefits can only be achieved if proper utility studies are done to investigate how V2G impacts the distribution system performance. In this paper, the impact of V2G location on energy Loss in a feeder line segment is investigated. The results show that the point of placement or location of V2G units in a feeder line significantly impacts the energy Loss Reduction profile of the line segment. This research offers an invaluable resource to utility stakeholders and operators.
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Impact of V2G on Distribution Feeder: A Power Loss Reduction Approach
International Journal of Emerging Electric Power Systems, 2013Co-Authors: Uwakwe C. Chukwu, Satish M. MahajanAbstract:Abstract The penetration of Vehicle-to-Grid (V2G) into the electrical distribution system has potential to create room for many operational benefits. A V2G facility installed on a distribution feeder line segment may affect power Loss in the distribution system. Mathematical models are developed to study how magnitude of V2G reactive power injection and different mixes of uniformly distributed loads and lumped loads can impact power Loss on a distribution system feeder. The V2G facilities assumed in this research are V2G parking lots with provision for injecting reactive currents into the feeder of a distribution network. It is shown that Loss Reduction can be greatly influenced by the pattern of loading, the amount of V2G reactive injection as well as position and number of V2G parking lot along the feeder segment. Useful results are obtained, with a promise that more than 95% power Loss Reduction (relative to power Loss in the system without V2G installed) is possible by optimally locating a V2G parking lot along the feeder. It is observed that location and capacity injection of a V2G facility are the most critical for Loss Reduction. It was concluded that proper system planning and operational practice are required in order to reduce power Losses.
S.y. Choi - One of the best experts on this subject based on the ideXlab platform.
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Heuristic approach for Loss Reduction in distribution networks
2006 IEEE Power Engineering Society General Meeting, 2006Co-Authors: S.y. ChoiAbstract:Network reconfiguration in distribution systems is realized by changing the status of sectionalizing switches, and is usually done for Loss Reduction or load balancing in the system. This paper presents an effective heuristic based switching scheme to solve the distribution feeder Loss Reduction problem. The proposed algorithm consists of two parts. One is to set up a decision tree to represent the various switching operations available. Another is to apply a proposed technique called cyclic best first search. The proposed algorithm identifies the most effective the set of switch status configuration of distribution system for Loss Reduction. To demonstrate the validity of the proposed algorithm, numerical calculations are carried out the 32 bus system model.
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Loss Reduction in Distribution Networks Using Cyclic Best First Search
Lecture Notes in Computer Science, 2006Co-Authors: S.y. Choi, Myong-chul Shin, Jae-sang ChaAbstract:Network reconfiguration in distribution systems is realized by changing the status of sectionalizing switches, and is usually done for Loss Reduction or load balancing in the system. This paper presents an effective heuristic based switching scheme to solve the distribution feeder Loss Reduction problem. The proposed algorithm consists of two parts. One is to set up a decision tree to represent the various switching operations available. Another is to apply a proposed technique called cyclic best first search. The proposed algorithm identifies the most effective the set of switch status configuration of distribution system for Loss Reduction. To demonstrate the validity of the proposed algorithm, numerical calculations are carried out the 32 bus system models.
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ICCSA (5) - Loss Reduction in distribution networks using cyclic best first search
Computational Science and Its Applications - ICCSA 2006, 2006Co-Authors: S.y. Choi, Myong-chul Shin, Jae-sang ChaAbstract:Network reconfiguration in distribution systems is realized by changing the status of sectionalizing switches, and is usually done for Loss Reduction or load balancing in the system. This paper presents an effective heuristic based switching scheme to solve the distribution feeder Loss Reduction problem. The proposed algorithm consists of two parts. One is to set up a decision tree to represent the various switching operations available. Another is to apply a proposed technique called cyclic best first search. The proposed algorithm identifies the most effective the set of switch status configuration of distribution system for Loss Reduction. To demonstrate the validity of the proposed algorithm, numerical calculations are carried out the 32 bus system models.
Julie Pillot - One of the best experts on this subject based on the ideXlab platform.
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Water Loss Reduction: a new approach to achieve real water savings and environmental benefits
Water Science and Technology: Water Supply, 2018Co-Authors: E. Renaud, Julie Pillot, C. Aubrun, E. Brejoux, B. AugeardAbstract:Water scarcity is a harsh reality for many regions. As a result, reducing Losses from Water Supply Systems (WSSs) is of great environmental importance around the world. In France, water suppliers are legally bound to reduce Losses from their WSSs through Loss Reduction Action Plans (LRAPs). For these plans to work, they need to suit the area to which they are applied. Their impacts on water bodies and the environment also need to be taken into account. This paper explains an innovative approach to fulfil these objectives. It involves adding two elements to the design of LRAPs: calculation of a Water Abstraction and Discharge Balance (WADB) and Analysis of Environmental Effects (AEE) relating to Loss Reduction actions, based on Life Cycle Assessment (LCA). The usefulness and the practicality of this approach are examined through two practical case studies. It is shown that the WADB allows LRAPs to be configured to optimise water savings in the most sensitive water bodies. AEE makes it possible to identify a Loss Reduction level above which the overall environmental balance becomes negative. While the LRAP design and the WADB calculation methods are ready to be used by WSS managers, the AEE still requires further improvement.
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Up to what point is Loss Reduction environmentally friendly?: The LCA of Loss Reduction scenarios in drinking water networks
Water Research, 2016Co-Authors: Julie Pillot, Laureline Catel, E. Renaud, Bénédicte Augeard, Philippe RouxAbstract:In a context of increasing water shortage all over the world, water utilities must minimise Losses in their distribution networks and draw up water Loss Reduction action plans. While leak Reduction is clearly an important part of sustainable water management, its impacts have to be reconsidered in a broader objective of environmental protection than strictly the avoided Losses in cubic metres of water. Reducing the volume of water abstracted reduces also environmental impacts associated to water production (the operation and infrastructure needed for abstraction, treatment, supply). In the mean time, activities for reducing water Losses generate their own environmental impacts, notably as a result of the work, equipment, and infrastructures used for this purpose. In this study, Life Cycle Assessment (LCA) was used to assess and compare two sets of environmental impacts: those resulting from the production and supply of water which will never reach subscribers, and those caused by water Loss Reduction activities. This information can then be used to establish whether or not there is a point beyond which Loss Reduction is no longer effective in reducing the environmental impacts of drinking water supply. Results show that the improvement actions that start from a low water supply efficiency are clearly beneficial for ecosystems, human health and preservation of resources. When seeking to improve the efficiency beyond certain values (about 65%), the uncertainty makes it impossible to conclude for an environmental benefit on all impact categories.
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Evaluating the environmental impact of Loss Reduction in drinking water networks
2015Co-Authors: Julie Pillot, Laureline Catel, E. Renaud, Bénédicte Augeard, Philippe RouxAbstract:Under the “Grenelle II” law, French water utilities are required to minimise Losses in their distribution networks. Under the same regulations, suppliers whose Loss rate exceeds a certain threshold are required to draw up dedicated Loss Reduction action plans. The aim of the aforementioned regulations is mainly to limit the amount of water removed from the natural environment. However, reducing Losses within a network does not always mean that water resources are saved. A certain proportion of water lost through leaking pipes and other malfunctions will naturally find its way back into the water table. With this in mind, the French government and ONEMA (French national water body) asked IRSTEA (French research center) to carry out a study into water Loss Reduction strategies. In water-related legislation, environmental issues are addressed only in terms of the quantitative status of water bodies, whereas in reality, work carried out to conserve water resources can have environmental effects of its own, such as increased use of energy and greenhouse gas emissions. To create the most environmentally-friendly Loss Reduction strategy possible, these additional effects need to be properly identified. To this end, we carried out a multi-criteria analysis of the environmental impacts of Loss Reduction activities. Using the Life Cycle Analysis (LCA) method, we examined six types of common work carried out as part of a multi-annual Loss Reduction strategy. These were active leak detection (using acoustic methods), leak repair, reporting network interventions, estimation of unmetered consumption, pressure Reduction, and sectorisation. Proportions for each action were estimated for a network of around 160 km of pipes with approximately 4,000 subscribers. We decided to apply our evaluation to a program of actions, rather than assessing each action individually. This is because Loss Reduction results from the collective effects of multiple measures. The environmental impacts examined using the LCA method result mainly from work being carried out on water networks. While such work is essential in order to repair leaks and replace defective pipe sections, doing so in an environmentally friendly way calls for a precise identification of defects. Utilities need to have up-to-date knowledge about the state and layout of their network, as well as using the correct tools to identify defective pipes. An effective pressure management strategy can also help to delay the occurrence of leaks. One challenge we face in this study is to assess how much water is likely to be saved by implementing a given action plan. These savings are difficult to estimate because they depend heavily on the characteristics of the network in question (initial performance, knowledge of the network, layout and environment). The next step will be to compare the environmental impacts of contrasted scenarios (LCA Mid Point category). A scenario represents the level of Loss Reduction that could be expected if a given action plan were to be implemented. Based on the results of this work, it should be possible to identify a level of network performance (context dependent) above which it is no longer environmentally beneficial to continue trying to reduce water Losses.
Philippe Roux - One of the best experts on this subject based on the ideXlab platform.
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Up to what point is Loss Reduction environmentally friendly?: The LCA of Loss Reduction scenarios in drinking water networks
Water Research, 2016Co-Authors: Julie Pillot, Laureline Catel, E. Renaud, Bénédicte Augeard, Philippe RouxAbstract:In a context of increasing water shortage all over the world, water utilities must minimise Losses in their distribution networks and draw up water Loss Reduction action plans. While leak Reduction is clearly an important part of sustainable water management, its impacts have to be reconsidered in a broader objective of environmental protection than strictly the avoided Losses in cubic metres of water. Reducing the volume of water abstracted reduces also environmental impacts associated to water production (the operation and infrastructure needed for abstraction, treatment, supply). In the mean time, activities for reducing water Losses generate their own environmental impacts, notably as a result of the work, equipment, and infrastructures used for this purpose. In this study, Life Cycle Assessment (LCA) was used to assess and compare two sets of environmental impacts: those resulting from the production and supply of water which will never reach subscribers, and those caused by water Loss Reduction activities. This information can then be used to establish whether or not there is a point beyond which Loss Reduction is no longer effective in reducing the environmental impacts of drinking water supply. Results show that the improvement actions that start from a low water supply efficiency are clearly beneficial for ecosystems, human health and preservation of resources. When seeking to improve the efficiency beyond certain values (about 65%), the uncertainty makes it impossible to conclude for an environmental benefit on all impact categories.
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Evaluating the environmental impact of Loss Reduction in drinking water networks
2015Co-Authors: Julie Pillot, Laureline Catel, E. Renaud, Bénédicte Augeard, Philippe RouxAbstract:Under the “Grenelle II” law, French water utilities are required to minimise Losses in their distribution networks. Under the same regulations, suppliers whose Loss rate exceeds a certain threshold are required to draw up dedicated Loss Reduction action plans. The aim of the aforementioned regulations is mainly to limit the amount of water removed from the natural environment. However, reducing Losses within a network does not always mean that water resources are saved. A certain proportion of water lost through leaking pipes and other malfunctions will naturally find its way back into the water table. With this in mind, the French government and ONEMA (French national water body) asked IRSTEA (French research center) to carry out a study into water Loss Reduction strategies. In water-related legislation, environmental issues are addressed only in terms of the quantitative status of water bodies, whereas in reality, work carried out to conserve water resources can have environmental effects of its own, such as increased use of energy and greenhouse gas emissions. To create the most environmentally-friendly Loss Reduction strategy possible, these additional effects need to be properly identified. To this end, we carried out a multi-criteria analysis of the environmental impacts of Loss Reduction activities. Using the Life Cycle Analysis (LCA) method, we examined six types of common work carried out as part of a multi-annual Loss Reduction strategy. These were active leak detection (using acoustic methods), leak repair, reporting network interventions, estimation of unmetered consumption, pressure Reduction, and sectorisation. Proportions for each action were estimated for a network of around 160 km of pipes with approximately 4,000 subscribers. We decided to apply our evaluation to a program of actions, rather than assessing each action individually. This is because Loss Reduction results from the collective effects of multiple measures. The environmental impacts examined using the LCA method result mainly from work being carried out on water networks. While such work is essential in order to repair leaks and replace defective pipe sections, doing so in an environmentally friendly way calls for a precise identification of defects. Utilities need to have up-to-date knowledge about the state and layout of their network, as well as using the correct tools to identify defective pipes. An effective pressure management strategy can also help to delay the occurrence of leaks. One challenge we face in this study is to assess how much water is likely to be saved by implementing a given action plan. These savings are difficult to estimate because they depend heavily on the characteristics of the network in question (initial performance, knowledge of the network, layout and environment). The next step will be to compare the environmental impacts of contrasted scenarios (LCA Mid Point category). A scenario represents the level of Loss Reduction that could be expected if a given action plan were to be implemented. Based on the results of this work, it should be possible to identify a level of network performance (context dependent) above which it is no longer environmentally beneficial to continue trying to reduce water Losses.
