Operation Rule Derivation of Hydropower Reservoirs by Support Vector Machine Based on Grey Relational Analysis

Zhu, Yuxin; Zhou, Jianzhong; Qiu, Hongya; Li, Juncong

doi:10.3390/w13182518

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…Dynamic programming using the Bellman model is the best solution for non-linear conditions [17]. Bellman model is an optimization technique in solving the decision process through stages [8] and it is used extensively in reservoir optimization [18][19][20][21]. This happens because the Bellman method has the convenience of incorporating stochastic properties [22].…”

Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimizations of Hydroelectric Exploitation Using Dynamic Programs in Citarum Cascade Reservoirs

Nasution¹

2022

GEOMATE

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Saguling, Cirata, and Jatiluhur are reservoirs built on the Citarum River, in West Java, Indonesia, which have the main function as power plants. It is deemed necessary for Jatiluhur Reservoir to have the right operating pattern to get optimal water management since it is different from other reservoirs. Citarum cascade which has a multi-reservoir operations pattern has a problem because of deviations that occurred on the realization of the trajectory against the planned trajectory guidelines. This happens due to the complex relationship between physical variables and hydrological uncertainty. To overcome this problem the dynamic programming of the Bellman model was used through optimization with forecasts of future discharge. Bellman model is the best approach for non-linear conditions because it can integrate stochastic properties. In addition, to overcome the curse of dimensionality in multi-reservoir operations, the Du Couloir iterative method is applied. In optimizing the management of the Citarum cascade reservoirs, a variety of water usage prices per month was used as the economic variable. The results of this research are as follow: a utility function to achieve the goal of maximizing hydroelectric benefits is achieved, the needs of raw water downstream are refilled, and no water will be wasted through spillways. The application of this method to reservoir optimization can overcome dimensional issues with exponentially faster computation times.

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Section: Introductionmentioning

confidence: 99%

Multi-Objective Optimizations of Hydroelectric Exploitation Using Dynamic Programs in Citarum Cascade Reservoirs

Nasution¹

2022

GEOMATE

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“…However, explicit random description of runoff information usually causes the curse of dimension. By contrast, ISO typically derives operation rules by optimizing the deterministic runoff data, such as historical inflow and simulated inflow, which inherently contain the probability distribution of runoff (Zhu et al, 2021). Then, operation rules are derived by the parameterization‐simulation‐optimization (PSO) or fitting method.…”

Section: Introductionmentioning

confidence: 99%

Joint operation rules considering the uncertainty of energy available for multiple cascaded hydropower system

Cheng

et al. 2022

J American Water Resour Assoc

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Multi‐reservoir operation rules have been widely used in practice operation. The operation rules are often derived from historical or simulated run‐off information through implicit stochastic optimization or parameterization‐simulation‐optimization. The output decisions of operation rules are usually obtained without considering inflow forecasting or using perfect runoff forecast information, which is hardly implemented in practical applications. This paper proposes robust joint operation rules for multiple cascaded reservoirs considering the uncertainty of energy available. The rule parameters are optimized using multi‐step genetic algorithm for minimum‐power maximization. A case study for a three‐cascaded‐reservoirs system shows that, compared with deterministic joint operation rules, the accuracy of energy available estimation of joint operation rules is increased by 2.3%, considering inflow uncertainty. The simulated minimum‐power decision of joint operation rules considering the uncertainty of energy available is 40.4% higher than that of determinate joint operation rules. Results indicate that there is a possibility of obtaining greater and more effective power decisions through the joint operation rules considering the uncertainty of available energy.

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Optimal Energy Storage Operation Chart and Output Distribution of Cascade Reservoirs Based on Operating Rules Derivation

Zhu

Zhou²,

Zhang³

et al. 2022

Water Resour Manage

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Energy storage operation chart (ESOC) has been one of the most popular method in cascade reservoirs conventional operation. However, the problem of distributing the total output obtained from the ESOC has not yet been solved reasonably. Discriminant coefficient method is a traditional method to guide the output distribution by determining the order of reservoir supply or storage, but cannot quantify the water used in operation. Thus, this study develops a new output distribution model using the polynomial fitting method and the artificial neural network (ANN) to express the functional relationship, which derive from deterministic optimization results of long-term runoff series with the goal of maximizing power generation.The cascade reservoirs of lower reaches of the Jinsha River in China are selected as a case study.By comparing with discriminant coefficient method and proposed method, the proposed method can rationally distribute the total output to avoid the problem of concentrated deserting water in downstream reservoirs, which usually happens in discriminant coefficient method.Generally, this study proposed an effective alternative method to guide the cascade reservoirs operation.

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Operation Rule Derivation of Hydropower Reservoirs by Support Vector Machine Based on Grey Relational Analysis

Cited by 5 publications

References 37 publications

Multi-Objective Optimizations of Hydroelectric Exploitation Using Dynamic Programs in Citarum Cascade Reservoirs

Multi-Objective Optimizations of Hydroelectric Exploitation Using Dynamic Programs in Citarum Cascade Reservoirs

Joint operation rules considering the uncertainty of energy available for multiple cascaded hydropower system

Optimal Energy Storage Operation Chart and Output Distribution of Cascade Reservoirs Based on Operating Rules Derivation

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