Benefits of coordination in the operation of hydroelectric power systems: Brazilian case

Marques, Thyago Carvalho; Cicogna, Marcelo Augusto; Soares, S.

doi:10.1109/pes.2006.1709574

Cited by 6 publications

(9 citation statements)

References 7 publications

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“…[6] This paper presents a methodological development to address this issue, and uses an example to investigate the potential lower and upper bounds in reservoir system operation benefits, providing a reference framework for evaluating the potential economic gains from improved coordination. The methodology presented in this paper generalizes the work of Goor et al [2007], Marques et al [2006], and Anghileri et al [2012] by removing the limitations on the system's size (number of reservoirs) and by explicitly capturing the stochastic nature of the reservoir operation problem (no certainty equivalence assumption required).…”

Section: Introductionmentioning

confidence: 88%

“…In order to construct such representation, we used a similar approach as in Marques et al . [], optimizing reservoirs individually. However, to maintain the method's generality and represent a possible lower bound, the SDP policies were converted to rule curves, and the system was simulated for calculation of noncoordination benefits.…”

Section: Methodsmentioning

confidence: 99%

“…[], Marques et al . [], and Anghileri et al . [] by removing the limitations on the system's size (number of reservoirs) and by explicitly capturing the stochastic nature of the reservoir operation problem (no certainty equivalence assumption required).…”

Section: Introductionmentioning

confidence: 99%

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The economic value of coordination in large‐scale multireservoir systems: The Parana River case

Marques

Tilmant

2013

Water Resources Research

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[1] The coordination of reservoir operation is critical for water systems' efficiency. Improved coordination requires sharing information, demanding a clear understanding of the potential gains and its distribution among the users to motivate engagement in coordinated operations and bearing of transaction costs. In a multiuser, multireservoir system, the evaluation of the potential coordination gains is not trivial because it requires the simultaneous evaluation of numerous trade offs. This paper presents a methodology to identify the likely upper and lower bounds in multireservoir system benefits, providing a reference framework for analyzing the economic value of coordination. The methodology is applied to a large-scale multireservoir system in Brazil. The methods rely on the comparison between two management scenarios. The first one mimics typical system operation based on individually designed rule curves, which are likely to perform on the lower bound. This is compared with fullscale system-wide optimization through an Stochastic Dual Dynamic Programming algorithm to represent fully coordinated reservoir operation (upper bound). For our case study, results indicate that better coordination reduced spills and improved releases timing according to reservoirs characteristics and location, allowing overall gains between 3% and 8% in energy and 7.9% in revenues, with revenues mostly improved by coordination in dry years. Larger reservoirs presented the highest gains in absolute terms, while the smaller ones presented the highest relative increases. By indicating individual gains at each reservoir, valuable information is produced to support future negotiations and benefit sharing among different agents, being water agencies or power companies.

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Section: Introductionmentioning

confidence: 88%

Section: Methodsmentioning

confidence: 99%

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The economic value of coordination in large‐scale multireservoir systems: The Parana River case

Marques

Tilmant

2013

Water Resources Research

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“…et al, 2003), (Yu et al, 1998), (Yeh, 1985). As não linearidades intrínsecas ao problema estão associadas às perdas hidráuli-cas, polinômios cota-volume, cota-área e vazão-nível jusante (Marques et al, 2006), (Soares & Carneiro, 1991).…”

Section: Introductionunclassified

Influência da variação da produtividade das usinas hidroelétricas no cálculo da energia firme

Oliveira

Rocha

Silva

et al. 2009

Sba Controle & Automação

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In the present work, the problem associated to the firm energy evaluation is treated as a non linear optimization model, which allows the representation of the productivity variation of the hydro plants. The proposed model takes into account the individualized representation of the plants and the historical series of flows since the month of January of 1931. The proposed optimization problem will be solved using the Primal-Dual Interior Point Method. A case study will be presented including the Brazilian Interconnected National System. The results obtained show that the proposed methodology is promising, since it presents an energy market value more realistic when compared with existing methodologies. RESUMONo presente trabalho, o problema associado ao cálculo da energia firme é tratado como um modelo não linear de otimização, o que permite a representação da variação da produtividade das usinas. No modelo proposto é considerada a representação individualizada das usinas bem como a série INTRODUÇÃOUm dos desafios da área de planejamento da operação e expansão consiste em determinar a melhor metodologia para avaliar a capacidade de suprimento de um sistema hidrelé-trico e das usinas que o compõem frente um comportamento hidrológico estocástico, denominado energia firme. Tradicionalmente, avalia-se tanto a energia firme global do sistema (conjunto de usinas hidrelétricas), como também, a energia firme individualizada para cada usina hidrelétrica que compõe o sistema.De acordo com as regras de comercialização de energia elé-trica no Brasil, cada usina hidrelétrica tem um limite (lastro) para o estabelecimento de contratos. Obviamente, o lastro não corresponde à capacidade instalada da usina hidrelétrica, Revista

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“…9 9 See Marques (2006) on the Lundas; and see Human Rights Watch (2007) on forced evictions near Luanda. …”

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confidence: 99%

Violence and War in Agrarian Perspective

Cramer

Richards

2011

Journal of Agrarian Change

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The bulk of analysis and commentary on violent conflicts in developing countries over the past 20 years or so has neglected the dynamics and tensions of agrarian political economy. Introducing a special issue devoted to these agrarian dimensions of armed conflict, non‐war violence and post‐war repertoires of political mobilization, this paper argues for a new research and policy agenda. In doing so, we revive some older analytical approaches and suggest that they can refresh and enhance current scholarship. We argue too for a historical perspective: not simply to highlight precedents but, rather, because such a perspective helps to clarify the issues involved and their centrality to processes of rural change, as well as to show that there may be long‐run continuities in patterns of conflict. Bringing the agrarian back in to the study of violent conflict means investigating access to land and capital and means of mobilizing labour; it means investigating changes in the institutional regulation of such access and control; and it means identifying the tensions, techniques of compulsion and modes of resistance developed around productive relations in, typically, a globalized context.

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Benefits of coordination in the operation of hydroelectric power systems: Brazilian case

Cited by 6 publications

References 7 publications

The economic value of coordination in large‐scale multireservoir systems: The Parana River case

The economic value of coordination in large‐scale multireservoir systems: The Parana River case

Influência da variação da produtividade das usinas hidroelétricas no cálculo da energia firme

Violence and War in Agrarian Perspective

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