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Optimization models have been widely used in the power industry to aid the decision-making process of scheduling and dispatching electric power generation resources, a process known as unit commitment (UC). Since UC’s birth, there have been two major waves of revolution on UC research and real life practice. The first wave has made mixed integer programming stand out from the early solution and modeling...
This paper is concerned with a mathematical model for numerical simulation of 2D flood waves due to complete or partial dam-break. The governing water equations are solved by a implicit bidiagonal numerical scheme, based on the MacCormack's predictor-corrector technique. The mathematical model is used to numerically compute the water surface from supercritical flow to sub critical one or from sub...
It has long been recognized that repeated interactions among strategic firms can lead to tacit collusion, a form of market power abuse that can cause more market inefficiencies than in a static game. Harrington et al. formulated the tacit collusion model into a nonlinear optimization problem, and Liu extended the collusion model into electricity markets with transmission constraints. This paper presents...
The microgrid concept is not a new one; however, implementing it and integrating it to a legacy grid is a challenge that engineers are thriving to solve. This challenge is due to many reasons including economic and technology [4]. The survivability of such a system in terms of its reliability and robustness to faults are key points to explore in the microgrid. The FREEDMources. A Green Hub was designed...
The effect of the variation of B-H properties obtained by different means and data access modes under different exciting frequencies on iron loss and flux in GO silicon steel laminations is investigated, and the results of the numerical modeling is demonstrated on a benchmark model.
This paper investigates the additional iron loss generated in the laminated silicon sheets of the core or the magnetic shields of large power transformers due to the leakage flux. A verification model is well established, and an efficient analysis method is implemented and validated. Both the magnetic and electric anisotropy of the oriented silicon steel sheets are taken into account in 3-D FEM eddy...
A computer simulation of hand grasp control by force and position feedback has been implemented with a digital controller and a discrete-time muscle model. The simulated system consists of a stiffness controller, a pulse-width activation controller, a coactivation map, a flexor and an extensor muscle, and separate internal and external loads. The measured feedback quantities are the position and the...
A set of tasks {T1, T2, ..., Tr] are to be scheduled on a two-processor computing system. The execution time of each of the tasks is given. Moreover, a partial ordering ≪ over the set of tasks is specified. If Ti ≪ Tj, it is required that the execution of Tj will not begin until the completion of the execution of Ti. Let ω denote the total elapsed time for the execution of all the tasks in the set...
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