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Journals and Conferences
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)
The aim of this work was to study linear deterministic models to predict tissue temperature during radiofrequency cardiac ablation (RFCA) by measuring magnitudes such as electrode temperature, power and impedance between active and dispersive electrodes. The concept involves autoregressive models with exogenous input (ARX), which is a particular case of the… (More)
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.
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)
Open-end winding induction machines fed from two standard two-level voltage source inverters (VSI) provide an attractive arrangement for AC drives. An alternative approach is to use a dual output indirect matrix converter (IMC). It is well known that IMC provides fully bidirectional power flow operation, with small input size filter requirements. Whilst a… (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.
PURPOSE To assess whether tailoring the Kp and Ki values of a proportional-integral (PI) controller during radiofrequency (RF) cardiac ablation could be advantageous from the point of view of the dynamic behaviour of the controller, in particular, whether control action could be speeded up and larger lesions obtained. METHODS Theoretical models were built… (More)
Detailed models of modular multi-level converters (MMCs) are cumbersome for electromagnetic transient simulation programs because of their high number of components which involve large simulation times. In this work, the modeling of an MMC is addressed with the objective of reducing the simulation time. First, the MMC structure is presented, including the… (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)
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)