We use a power grid model with M generators and N consumption units to optimize the grid and its control. Each consumer demand is drawn from a predefined finite-size-support distribution, thus simulating the instantaneous load fluctuations. Each generator has a maximum power capability. A generator is not overloaded if the sum of the loads of consumers connected to a generator does not exceed i...

Permanent Magnet Synchronous Generators are an emerging technology in wind power applications. A simplified Thevenin equivalent simulation model of a wind generator has been developed in the ATPDraw environment and validated by comparing its dynamics with that of a Matlab/Simulink detailed model. The simplified model includes also power electronic circuits, for interfacing the generator to a MV...

This paper presents SGrid, a service-oriented model for the Semantic Grid. Each Grid service in SGrid is a Web service with certain domain knowledge. A Web services oriented wrapper generator has been implemented to automatically wrap legacy codes as Grid services exposed as Web services. Each wrapped Grid service is supplemented with domain ontology and registered with a Semantic Grid Service ...

A robust solver for the elliptic grid generation equations is sought via a numerical study. The system of PDEs is discretized with nite diierences and multigrid methods are applied to the resulting nonlinear algebraic equations. Multigrid iterations are compared with respect to the robustness and eeciency. Diierent smoothers are tried to improve the convergence of iterations. The methods are ap...

1. Pseudorandomness and the Blum-Micali generator: 4/1/14 1 2. Proof of Security of the Blum-Micali Generator: 4/3/14 4 3. The Goldreich-Levin Theorem: 4/8/14 6 4. Commitments: 4/10/14 9 5. Commitments II: 4/17/14 12 6. Oblivious Transfer: 4/22/14 14 7. Oblivious Transfer II: 4/24/14 16 8. Zero-Knowledge Proofs: 4/29/14 18 10. Zero-Knowledge Proofs III: 5/6/14 21 11. Zero-Knowledge Proofs IV: 5...

This paper presents actual cases of steady reactive power oscillation of Distributed Generations (DGs) during parallel operation with the main grid. The cause of the problem was found to be the adverse effects of excitation system voltage regulation. It is shown, through preliminary investigation and detailed simulation studies, that how the excitation control system can be modified to overcome...

In this paper, the authors investigated a Direct Drive Permanent Magnet Synchronous Generator Wind Turbine (PMSG-WT). This study deals with control of the PWM back-to-back converter (AC/AC) of the wind turbine, since the average size of WTG installations has increased due to the advent of larger capacity machines, especially variable speed technology, this raise of integration rate of wind ener...