Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 3

GAMS Related Publications

3 Application of GAMS and GA in the Location and Penetration of Distributed Generation

Authors: Reza Sedaghati, Mojtaba Hakimzadeh, Alireza Dehghani Pilehvarani, Mohammad Jafari Far

Abstract:

Distributed Generation (DG) can help in reducing the cost of electricity to the costumer, relieve network congestion and provide environmentally friendly energy close to load centers. Its capacity is also scalable and it provides voltage support at distribution level. Hence, DG placement and penetration level is an important problem for both the utility and DG owner. DG allocation and capacity determination is a nonlinear optimization problem. The objective function of this problem is the minimization of the total loss of the distribution system. Also high levels of penetration of DG are a new challenge for traditional electric power systems. This paper presents a new methodology for the optimal placement of DG and penetration level of DG in distribution system based on General Algebraic Modeling System (GAMS) and Genetic Algorithm (GA).

Keywords: Distributed Generation, location, distribution network, loss reduction, GAMS

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2 Optimal Water Allocation: Sustainable Management of Dam Reservoir

Authors: Shatirah Akib, Sadia Rahman, Afshin Jahangirzadeh, Babak Kamali

Abstract:

Scarcity of water resources and huge costs of establishing new hydraulic installations necessitate optimal exploitation from existing reservoirs. Sustainable management and efficient exploitation from existing finite water resources are important factors in water resource management, particularly in the periods of water insufficiency and in dry regions, and on account of competitive allocations in the view of exploitation management. This study aims to minimize reservoir water release from a determined rate of demand. A numerical model for water optimal exploitation has been developed using GAMS introduced by the World Bank and applied to the case of Meijaran dam, northern Iran. The results indicate that this model can optimize the function of reservoir exploitation while required water for lower parts of the region will be supplied. Further, allocating optimal water from reservoir, the optimal rate of water allocated to any group of the users were specified to increase benefits in curve dam exploitation.

Keywords: water resource management, Water Reservoirs, GAMS, water allocation, Meijaran dam

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1 A Comparison of Exact and Heuristic Approaches to Capital Budgeting

Authors: Miloš Šeda, Jindřiška Šedová

Abstract:

This paper summarizes and compares approaches to solving the knapsack problem and its known application in capital budgeting. The first approach uses deterministic methods and can be applied to small-size tasks with a single constraint. We can also apply commercial software systems such as the GAMS modelling system. However, because of NP-completeness of the problem, more complex problem instances must be solved by means of heuristic techniques to achieve an approximation of the exact solution in a reasonable amount of time. We show the problem representation and parameter settings for a genetic algorithm framework.

Keywords: Genetic Algorithm, Capital Budgeting, knapsack problem, GAMS, heuristic method

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