In the conventional structure of the wind turbines along with the doubly-fed induction generator (DFIG), the stator is directly connected to the power grid. Therefore, voltage changes in the grid result in severe transient conditions in the stator and rotor. In cases where the changes are severe, the generator will be disconnected from the grid and consequently the grid stability will be attenu...

a detailed model of wind power station, including double fed induction generator, dfig is presented in this paper. two control mechanisms are included in the model. the inner control system uses stator flux oriented control for the rotor side converter and grid voltage vector control for the grid side converter. the outer control system is used for wind turbine pitch angle. pscad/emtdc is used ...

Title of dissertation: A FLUID-STRUCTURE INTERACTION STRATEGY WITH APPLICATION TO LOW REYNOLDS NUMBER FLAPPING FLIGHT Marcos Vanella Doctor of Philosophy, 2010 Dissertation directed by: Professor Elias Balaras Department of Mechanical Engineering In this work a structured adaptive mesh refinement (S-AMR) strategy for fluid-structure interaction (FSI) problems in laminar and turbulent incompress...

Under complex grid conditions, the voltage usually has an imbalance, low order harmonics, and a small of DC bias. When contains harmonics amount bias component, inverter's output current cannot meet connection requirements, there is three-phase imbalance in control strategy common VSG under unbalanced voltage. A theoretical analysis non-ideal power grids carried out, operating conditions propos...

In this paper we propose a distributed, replicated block device for The Grid based on the the replication algorithm of Y. Amir[1]. The end goal is to support application-specified semantics, both wrt. replication strategy and the consistency model used for reads and writes. We list the proposed features of the Grid Block Device and discuss various methods of implementation.

This paper presents a low-voltage ride-through (LVRT) control strategy for grid-connected energy storage systems (ESSs). In the past, researchers have investigated the LVRT control strategies to apply them to wind power generation (WPG) and solar energy generation (SEG) systems. Regardless of the energy source, the main purpose of the LVRT control strategies is to inject reactive power into the...

the johor strait is an estuarine system located on the coast of the state of johor in malaysia.the western part of johor strait is a shallow estuarine located between causeway and pulai river. ahydrodynamic model was calibrated based on the environmental fluid dynamic code (efdc) from 4th to 17th of october, 2009. in this calibration, the efdc hydrodynamic model was configured to simulate time ...

Resource selection is fundamental to the performance of master/slave applications. In this paper, we address the problem of promoting performance for distributed master/slave applications targeted to distributed, heterogeneous ”Grid” resources. We present a work-rate-based model of master/slave application performance which utilizes both system and application characteristics to select potentia...

This paper develops an effective control framework for DC voltage control and power-sharing of multi-terminal DC (MTDC) grids based on an optimal power flow (OPF) procedure and the voltage-droop control. In the proposed approach, an OPF algorithm is executed at the secondary level to find optimal reference of DC voltages and active powers of all voltage-regulating converters. Then, the voltage ...