Genetic algorithms optimization of hedging rules for operation of the multi-purpose Ubonratana Reservoir in Thailand

Chiamsathit, Chuthamat; Adeloye, Adebayo J.; Soudharajan, B.

doi:10.5194/piahs-364-507-2014

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…Chiamsathit used optimal hedging policies for the operation of Ubonratana Reservoir in Thailand. The output results showed that the vulnerability was significantly reduced by using the optimized hedging rules [31].…”

Section: Discussionmentioning

confidence: 99%

Comparison of Optimal Hedging Policies for Hydropower Reservoir System Operation

Tayebiyan

Mohammad

Al‐Ansari

et al. 2019

Water

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Reservoir operation rules play an important role in regions economic development. Meanwhile, hedging policies are mostly applied for municipal, industrial, and irrigation water supplies from reservoirs and it is less used for reservoir operation for hydropower generation. The concept of hedging and rationing factors can be used to maintain the water in a reservoir for the sake of increasing water storage and water head for future use. However, water storage and head are the key factors in operation of reservoir systems for hydropower generation. This study investigates the applicability of seven competing hedging policies including four customary forms of hedging (1PHP, 2PHP, 3PHP, DHP) and three new forms of hedging rules (SOPHP, BSOPHP, SHPHP) for reservoir operation for hydropower generation. The models were constructed in MATLAB R2011b based on the characteristics of the Batang Padang hydropower reservoir system, Malaysia. In order to maximize the output of power generation in operational periods (2003–2009), three optimization algorithms namely particle swarm optimization (PSO), genetic algorithm (GA), and hybrid PSO-GA were linked to one of the constructed model (1PHP as a test) to find the most effective algorithm. Since the results demonstrated the superiority of the hybrid PSO-GA algorithm compared to either PSO or GA, the hybrid PSO-GA were linked to each constructed model in order to find the optimal decision variables of each model. The proposed methodology was validated using monthly data from 2010–2012. The results showed that there are no significant difference between the output of monthly mean power generation during 2003–2009 and 2010–2012.The results declared that by applying the proposed policies, the output of power generation could increase by 13% with respect to the historical management. Moreover, the discrepancies between mean power generations from highest to lowest months were reduced from 49 MW to 26 MW, which is almost half. This means that hedging policies could efficiently distribute the water-supply and power-supply in the operational period and increase the stability of the system. Among the studied hedging policies, SHPHP is the most convenient policy for hydropower reservoir operation and gave the best result.

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Section: Discussionmentioning

confidence: 99%

Comparison of Optimal Hedging Policies for Hydropower Reservoir System Operation

Tayebiyan

Mohammad

Al‐Ansari

et al. 2019

Water

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“…Critical curves CR 1 and CR 2 define the storage values, which are triggers for rationing in the associated proportion. It was noted that the rationing is done in two stages and that the rationing factors in the supply demand, α 1 and α 2 , meet the 0 ≤ α 2 ≤ α 1 ≤ 1 condition (Chiamsathit et al, 2014).…”

Section: Proposed Scenariosmentioning

confidence: 99%

“…The standard operating policy (SOP) is the simplest and most often-used reservoir policy: that if possible, only the amount of water required in each period be released so that water can be preserved for future requirements (Rittima, 2009). However, SOP is not the ideal policy for reservoir operation because it causes large, single-period shortage or vulnerability (Chiamsathit et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The reservoir rule curves and the hedging rules provide operating guidelines that can be followed to minimize the impact of a drought when reservoirs are drawing down because of insufficient inflow (Tu et al, 2003). Hedging policies can offer effective and low-cost adaption and mitigation strategies for climate change (Adeloye & Dau, 2019).For hedging to be useful, water saving must be done during periods of normal reservoir operation, not when the water is already in short supply (Chiamsathit et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Development of reservoir operation rules using seasonal climate forecasts

Morais

Maia

2021

RBRH

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This study verified the suitability of using precipitation forecasts in defining operation rules for the Cruzeta reservoir in Rio Grande do Norte, Brazil. The operation rules were developed through reservoir operation simulation–optimization, using a genetic algorithm. The performance indicators were analyzed in five operation scenarios: standard operating policy (SOP), current reservoir rationing rule (C), rationing without forecast (R), rationing with forecast (RF), and rationing with perfect forecast (RPF). The SOP scenario better met the total demand but made the system very susceptible to supply collapse. The results of the RF and RPF scenarios showed better compliance with the priority demands and the total demand during the dry periods. Changing from RF to RPF scenario, there is a small improvement in the evaluation indexes. The use of rules integrating the seasonal weather forecast is thus recommended.

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“…In the last few decades, there have been many different ways of water supply operating rule curves, such as the standard operation rule curve [5], in which the release of the reservoir is a function of total available water (reservoir storage plus the inflow), and the hedging rule curve [6][7][8], in which the possibility of a drought event can occur in the future. The most challenging aspect of hedging is determining the timing and amount of rationing, as failing can be detrimental.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Dualistic Reservoir System Two-Dimensional Rule Curve with Three Allocation Rules

Muhaisen,

Khayyun,

Al-Mukhtar

2024

Civ Eng J

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A two-dimensional operation chart is commonly used to manage the operation of a dual-reservoir system, where the water storage in each reservoir is accurately considered in the water-supply decision. The dual reservoir chart should be combined with one allocation rule to better represent water supply distribution between reservoirs. In this study, the 2D rule curve was coupled with three allocation rules: variable allocation ratios, fixed allocation ratios, and compensation regulation, to identify the efficiency of using these rules with the 2D rule curve in operating the dual reservoirs. Mosul-Dukan dual reservoirs in Iraq were implemented as a study area using monthly data extended from 2001 to 2020. The Shuffled Complex Evolution Algorithm was used to optimize the water allocation ratios. The results revealed that the variable allocation ratios were superior to the other two rules in terms of water deficit, in which the total water shortage of the variable allocation ratios rule was 56590 Mm3. The total shortage was less than that obtained by the fixed allocation ratio and compensation regulation rules by 0.9% and 56%, respectively. Finally, the variable allocation ratio was more suitable for application with a 2D reservoir rule curve than the two remaining rules (fixed allocation ratio and compensation regulation rules). The variable allocation ratios sustainably manage reservoirs in the regions that suffer from water scarcity and represent the most vulnerable to the impact of climate change. Doi: 10.28991/CEJ-2024-010-02-04 Full Text: PDF

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Genetic algorithms optimization of hedging rules for operation of the multi-purpose Ubonratana Reservoir in Thailand

Cited by 11 publications

References 9 publications

Comparison of Optimal Hedging Policies for Hydropower Reservoir System Operation

Comparison of Optimal Hedging Policies for Hydropower Reservoir System Operation

Development of reservoir operation rules using seasonal climate forecasts

Optimization of Dualistic Reservoir System Two-Dimensional Rule Curve with Three Allocation Rules

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