This paper includes a distributed control strategy for the joint control of wind turbines and a diode based HVDC link with black start capability. In spite of using a Line Commutated Rectifier, the presented technique allows for the black-start operation of the off-shore grid. Moreover, an adequate desing of wind turbine pitch and active power control… (More)
Modern wind turbines allow for tight control of terminal voltage, this is particularly true for synchronous generator (SG) based wind turbines. Therefore, an integrated design of wind turbine and HVDC link control can lead to a substantial simplification of the off-shore rectifier. This paper introduces an integrated control algorithm for line commutated… (More)
In this paper, a control strategy intended to eliminate any DC voltage offset caused by a common-mode and zero sequence voltage reduction modulation, from the machine terminals, is presented. In order to achieve that goal, a PI resonant controller is proposed to control the machine currents. Simulation and experimental results are presented and discussed.
A strategy for an indirect matrix converter with two outputs to supply energy to a vector controlled open-end winding induction machine is presented. The modulation schemes for the input and two output stages aim to reduce the virtual DC link voltage for low speed operation and eliminate the zero sequence voltage in the load.
This paper includes the theoretical analysis and experimental validation of a control strategy for the direct power and current control of grid-connected inverters. The studied control strategy allows for constant active and reactive power delivery during unsymmetrical faults and with supply voltage distortion, without the use of a PLL or FLL. It has been… (More)
New regulations require wind power plants to contribute to grid frequency control. Wind turbine droop control, inertia emulation and the use of a washout filter are compared in this paper in order to ascertain the influence of such methods on the mechanical components of the wind turbine. When wind generators operate below rated power, these methods use the… (More)
Radiofrequency cardiac ablation (RFCA) has been used to treat certain types of cardiac arrhythmias by producing a thermal lesion. Even though a tissue temperature higher than 50ºC is required to destroy the target, thermal mapping is not currently used during RFCA. Our aim was thus to develop mathematical models capable of estimating tissue temperature from… (More)
This paper shows that it is possible to substantially reduce the rectifier capacitor and filter banks when using diode based HVDC link for the connection of large off-shore wind farms. The considered wind turbines are based on full power power converters. The paper includes a control strategy that allows the wind turbine front-end converters to control the… (More)