The Experts below are selected from a list of 123 Experts worldwide ranked by ideXlab platform
Randall Spaldingfeche - One of the best experts on this subject based on the ideXlab platform.
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climate change and hydroPower in the southern african Power Pool and zambezi river basin system wide impacts and policy implications
Energy Policy, 2017Co-Authors: Randall Spaldingfeche, Ia Joyce, Harald WinkleAbstract:This paper examines climate change impact on hydroPower will affect the expansion of the regional electricity system, as well as system costs and greenhouse gas emissions. The output from major Zambezi hydroPower plants could decline by 10–20% under a drying climate, while wetting of the basin produces only a marginal increase. At a regional level, the increases in electricity generation costs are relatively small (less than 1% over the long term), but could reach 20–30% in the near term for hydro-dependent countries (e.g. Mozambique and Zambia). Because some hydroPower could be displaced by coal, regional greenhouse gas emissions could increase by the equivalent of a large coal-fired Power station. The risks to regional electricity systems highlight the need for strong cooperative governance arrangements to manage shared water resources in the region, which could be bolstered by recent political initiatives. Beyond the level of individual investments, a policy shift is needed to integrate climate change and upstream development considerations into national and regional electricity planning, supported by relevant tools. In addition, the potential for increased carbon emissions has implications for the commitments of southern African countries under the Paris Agreement to the UNFCCC.
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electricity supply and demand scenarios for the southern african Power Pool
Energy Policy, 2017Co-Authors: Randall Spaldingfeche, Mamahloko Senatla, Francis Daviso Yamba, Iness Lukwesa, Grayso Himunzowa, Charles Heaps, Arthu Chapma, Gilberto Mahumane, Ernard Tembo, Imasiku NyambeAbstract:The study presents long-term electricity supply and demand scenarios for the twelve countries in the Southern African Power Pool, based on detailed bottom-up demand analysis for all countries and a set of internally consistent development scenarios. Total regional electricity demand and supply increase by eight to fourteen times from 2010 to 2070, with major shifts in both the sectoral composition of demand and the geography of demand, with South Africa becoming a much smaller share. On the supply side, the fuel mix shifts from coal and toward hydro in the medium term, but towards other renewables, such as solar, in the longer term, particularly in the scenarios with the fastest decline in capital costs for renewables. This leads to declining unit carbon dioxide emissions in the more aggressive scenarios, even though total Power sector emissions still increase. The unit cost of generation for the entire region is stable across all scenarios. The potential transformation of the supply sector would require a fundamental shift in resource use, grid management and infrastructure development in the region, as well as greater regional integration. This also implies significant institutional capacity development in the SAPP Coordination Centre or similar structures for cooperative management of resources.
V H Quintana - One of the best experts on this subject based on the ideXlab platform.
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existence and determination of competitive equilibrium in unit commitment Power Pool auctions price setting and scheduling alternatives
IEEE Transactions on Power Systems, 2001Co-Authors: M Madrigal, V H QuintanaAbstract:The existence, determination and effects of competitive market equilibrium for unit commitment Power Pool auctions are investigated in this paper. When an equilibrium does not exist, under specific situations, conflictive multiple optimal primal solutions may exist. When an equilibrium exists, multiple primal solutions do not represent conflicts of interest. The existence or nonexistence of competitive equilibrium can be determined if the dual problem is solved to optimality. If equilibrium does not exist, there is excess supply at the optimal dual solution, which can be used to define priority orders and price setting alternatives to determine a final schedule, and avoid the conflicts of interest and revenue deficiency. Under disequilibrium, the optimal dual variables are not market clearing prices; a nonuniform pricing rule that avoids the flaws and complications of other pricing rules, such as maximum average cost and price minimization auctions, is proposed in the paper. The proposed scheduling and price-setting alternatives show that unit commitment models can be used in a market environment.
Imasiku Nyambe - One of the best experts on this subject based on the ideXlab platform.
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electricity supply and demand scenarios for the southern african Power Pool
Energy Policy, 2017Co-Authors: Randall Spaldingfeche, Mamahloko Senatla, Francis Daviso Yamba, Iness Lukwesa, Grayso Himunzowa, Charles Heaps, Arthu Chapma, Gilberto Mahumane, Ernard Tembo, Imasiku NyambeAbstract:The study presents long-term electricity supply and demand scenarios for the twelve countries in the Southern African Power Pool, based on detailed bottom-up demand analysis for all countries and a set of internally consistent development scenarios. Total regional electricity demand and supply increase by eight to fourteen times from 2010 to 2070, with major shifts in both the sectoral composition of demand and the geography of demand, with South Africa becoming a much smaller share. On the supply side, the fuel mix shifts from coal and toward hydro in the medium term, but towards other renewables, such as solar, in the longer term, particularly in the scenarios with the fastest decline in capital costs for renewables. This leads to declining unit carbon dioxide emissions in the more aggressive scenarios, even though total Power sector emissions still increase. The unit cost of generation for the entire region is stable across all scenarios. The potential transformation of the supply sector would require a fundamental shift in resource use, grid management and infrastructure development in the region, as well as greater regional integration. This also implies significant institutional capacity development in the SAPP Coordination Centre or similar structures for cooperative management of resources.
Harald Winkle - One of the best experts on this subject based on the ideXlab platform.
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climate change and hydroPower in the southern african Power Pool and zambezi river basin system wide impacts and policy implications
Energy Policy, 2017Co-Authors: Randall Spaldingfeche, Ia Joyce, Harald WinkleAbstract:This paper examines climate change impact on hydroPower will affect the expansion of the regional electricity system, as well as system costs and greenhouse gas emissions. The output from major Zambezi hydroPower plants could decline by 10–20% under a drying climate, while wetting of the basin produces only a marginal increase. At a regional level, the increases in electricity generation costs are relatively small (less than 1% over the long term), but could reach 20–30% in the near term for hydro-dependent countries (e.g. Mozambique and Zambia). Because some hydroPower could be displaced by coal, regional greenhouse gas emissions could increase by the equivalent of a large coal-fired Power station. The risks to regional electricity systems highlight the need for strong cooperative governance arrangements to manage shared water resources in the region, which could be bolstered by recent political initiatives. Beyond the level of individual investments, a policy shift is needed to integrate climate change and upstream development considerations into national and regional electricity planning, supported by relevant tools. In addition, the potential for increased carbon emissions has implications for the commitments of southern African countries under the Paris Agreement to the UNFCCC.
M Madrigal - One of the best experts on this subject based on the ideXlab platform.
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existence and determination of competitive equilibrium in unit commitment Power Pool auctions price setting and scheduling alternatives
IEEE Transactions on Power Systems, 2001Co-Authors: M Madrigal, V H QuintanaAbstract:The existence, determination and effects of competitive market equilibrium for unit commitment Power Pool auctions are investigated in this paper. When an equilibrium does not exist, under specific situations, conflictive multiple optimal primal solutions may exist. When an equilibrium exists, multiple primal solutions do not represent conflicts of interest. The existence or nonexistence of competitive equilibrium can be determined if the dual problem is solved to optimality. If equilibrium does not exist, there is excess supply at the optimal dual solution, which can be used to define priority orders and price setting alternatives to determine a final schedule, and avoid the conflicts of interest and revenue deficiency. Under disequilibrium, the optimal dual variables are not market clearing prices; a nonuniform pricing rule that avoids the flaws and complications of other pricing rules, such as maximum average cost and price minimization auctions, is proposed in the paper. The proposed scheduling and price-setting alternatives show that unit commitment models can be used in a market environment.