Coordinated operation of hydrothermal scheduling with HVDC links considering network constraints becomes a vital issue due to their remote location and recent induction in the existing power system. The nonlinear complex nature problem introduces many variables which results heavy computational burden. A widespread approach for handling these complexities is reformulate by several linearization...

Compared with the rolling conditions of mild steels, those high tensile strength steels (HTSS) are very different, because their flow stress. Dimensional accuracy thickness at top end industrially rolled HTSS is lower, compared steel. This predicted force for not accurate sufficiently. problem due to only used stress model, but also theory model. If standard Hill’s equation and Bland Ford’s for...

The proportion of renewable power generation in the world has been increasing recent years. However, fluctuations and uncertainties bring a considerable challenge to future unit scheduling. Therefore, flexibility systems becomes more critical as large amount is integrated into systems. use flexible generators with energy storage one most efficient methods improving system flexibility. primary p...

Automatic generation control in electric power system design is a major concern nowadays due to its rising size, varying structure, integration of renewable-energy sources and distributed generators to meet the growing demand. In this paper, automatic generation control of an interconnected four area hydro thermal system examined. Each area equipped with reheat turbine for thermal system and hy...

In this paper, a genetic algorithm and constriction factor based particle swarm optimization technique are proposed for solving the short term variable head hydrothermal scheduling problem with transmission line losses. The performance efficiency of the proposed techniques is demonstrated on hydrothermal test system comprising of two thermal units and two hydro power plants. the simulation resu...

New additions of wind energy in the Nordic electricity market has been studied using the EMPS model. A scenario for year 2010 with CO2-tax and a total of 16 TWh of wind energy according to national targets have been included. The study focuses on the effect of changes in production scheduling imposed by new additions of wind energy under operation of a deregulated market. As a result, the impor...

In recent years the expansion of energy supplies from volatile renewable sources has triggered an increased interest in stochastic optimization models for hydro-thermal unit commitment. Several studies have modelled this as a two-stage or multi-stage stochastic mixed-integer optimization problem. Solving such problems directly is computationally intractable for large instances, and alternative ...

The power system restructuring has introduced competitiveness among different market players in electricity market and as a result transmission lines have to operate near to their thermal limits. System operators have a challenge to ensure reliable and secure transmission of power under these conditions. In this paper a rescheduling based congestion management solution is proposed for hybrid el...

This paper presents a modeling framework for analyzing competition between multiple firms that each possess a mixture of hydroelectric and thermal generation resources. Based upon the concept of a Cournot oligopoly with a competitive fringe, the model characterizes the Cournot equilibrium conditions of a multiperiod hydrothermal scheduling problem. Using data from the western United States elec...