General-purpose algebraic modeling languages are a central feature of popular computer systems for large-scale optimization. Languages such as AIMMS [2], AMPL [12, 13], GAMS [4, 5], LINGO [23] and MPL [18] allow people to develop and maintain diverse optimization models in their natural mathematical forms. The systems that process these languages convert automatically to and from the various da...

Executable mathematical modeling languages (EMLs), designed to facilitate model representation and execution, are traditionally weak in data modeling and management, which often consitutes a majority of the effort in a modeling project. In this paper, we describe a systematic approach for developing an integrated decision support system given an EML model. This approach is first demonstrated us...

The electric power system is critical to supporting the economic growth of a country. On other hand, growing concern about environment in recent years has pushed many countries create strategies minimize greenhouse gas emissions by increasing proportion new and renewable energy (NRE) sources. In Indonesia, Java-Bali grid most extensive electricity system, with demand 177,692.43 GWh peak load 40...

Global electric vehicles (EVs) fleet is expanding at a rapid pace. Considering the uncertain driving pattern of EVs, they are dynamic consumers electricity and their integration can give rise to operational problems jeopardize security power system. Under such circumstances, implementation demand-side response (DSR) programs more likely be an effective solution for reducing risks load curtailme...

Background: In this study, a general model of a hybrid off-grid energy system is developed, which can be adjusted to reflect real conditions in order to achieve economical and ecological optimisation of off-grid energy systems. Methods: Using linear programming methods in the General Algebraic Modeling System (GAMS) environment, the optimal configuration of the electrical power supply system fo...

Objetivo: Este trabajo analiza el costo óptimo de expansión, número líneas a incluir y tiempo simulación computacional para dos sistemas transmisión, empleando programación no lineal entera mixta través los solver del software GAMS (General Algebraic Modeling System). El objetivo es determinar las diferencias en costos expansión cuando se emplea modelo transporte, DC, híbrido disyuntivo. Metodo...

The model was created to assist in the appropriate allocation of water produce crops optimize net profit through monthly reservoir operation. maximizes crop revenue and determines type size cultivated for each zone, taking into account availability. following factors constrain optimization model: (1) availability; (2) demand irrigated farmland crops; (3) limited areas zone; (4) projected final ...

Some extensions of a modeling system are described that facilitate higher level structure identification within a model. These structures, which often involve complementarity relationships, can be exploited by modern large scale mathematical programming algorithms. A specific implementation of an extended mathematical programming tool is outlined that communicates structure in a computationally...

Integrating decentralised energy sources into the traditional distribution networks can result in technical issues impacting power quality. Innovative ideas are, therefore, needed to promote transformation of systems a smart grid. Distribution System operator (DSO) could make use flexibility emerging technologies as method address these quality issues. This study aims present an overview local ...

We describe Pyomo, an open source software package for modeling and solving mathematical programs in Python. Pyomo can be used to define abstract and concrete problems, create problem instances, and solve these instances with standard open-source and commercial solvers. Pyomo provides a capability that is commonly associated with algebraic modeling languages such as AMPL, AIMMS, and GAMS. In co...