scholarly journals Opportunities for Ice Storage to Provide Ancillary Services to Power Grids Incorporating Wind Turbine Generation

2012 ◽  
Author(s):  
A. F. Emery ◽  
C. Finley
Keyword(s):  
Wind Turbine ◽  
Ancillary Services ◽  
Power Grids ◽  
Ice Storage

scholarly journals Illustration of Modern Wind Turbine Ancillary Services

Energies ◽  
2010 ◽  
Vol 3 (6) ◽  
pp. 1290-1302 ◽  
Author(s):  
Ioannis D. Margaris ◽  
Anca D. Hansen ◽  
Poul Sørensen ◽  
Nikolaos D. Hatziargyriou
Keyword(s):  
Wind Turbine ◽  
Ancillary Services

scholarly journals Robust Control of a PMSG-Based Wind Turbine Generator Using Lyapunov Function

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1712
Author(s):  
Roghayyeh Pourebrahim ◽  
Amin Mohammadpour Shotorbani ◽  
Fausto Pedro García Márquez ◽  
Sajjad Tohidi ◽  
Behnam Mohammadi-Ivatloo
Keyword(s):  
Robust Control ◽  
Wind Turbine ◽  
Parameter Uncertainty ◽  
Short Circuit ◽  
Power Grid ◽  
Synchronous Generator ◽  
Power Grids ◽  
Adaptive Observer ◽  
Turbine Generator ◽  
Wind Turbine Generator

This paper proposes a robust finite-time controller (FTC) for a permanent magnet synchronous generator (PMSG)-based wind turbine generator (WTG). An adaptive observer is used for the rotor angle, rotor speed, and turbine torque estimations of the PMSG, thus eliminating the use of anemometers. The robustness of the proposed FTC regarding parameter uncertainty and the external weak power grid is analyzed. The impacts of the power grid short-circuit ratio (SCR) at the point of common coupling (PCC) on the conventional proportional-integral (PI) controller and the proposed FTC are discussed. Case studies illustrate that the proposed observer-based FTC is able to estimate the mechanical variables accurately and provides robust control for WTGs with parameter uncertainty and weak power grids.

Optimal DFIG Converter Protection Design under Different Controllers

2011 ◽  
Vol 84-85 ◽  
pp. 303-309
Author(s):  
Zi Fa Liu ◽  
Anaya Lara Olimpo
Keyword(s):  
Wind Turbine ◽  
Reactive Power ◽  
Power Converter ◽  
Power Grids ◽  
Fault Protection ◽  
Fault Ride Through ◽  
Capacitor Voltage ◽  
Simulation Results

To enable wind turbine and the power converter have the ability to protect itself without disconnection to power grids during the fault, protection for crowbar and chopper should be designed properly. Optimal resistors value of crowbar and chopper are calculated under PVdq controller and Fmac controller according to the proposed index which embody the effect of rotor current, reactive power, converter capacitor voltage and the electrical torque. Simulation results obtained by using PSCAD show that DFIG should be designed with different optimal crowbar and chopper resistors under different controllers. Moreover, DFIG with Fmac controller has better fault ride-through capability than that with PVdq controller.

scholarly journals An Active Common-Mode Voltage Canceler for PWM Converters in Wind-Turbine Doubly-Fed Induction Generators

Energies ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 691 ◽  
Author(s):  
Amr. Zalhaf ◽  
Mazen Abdel-Salam ◽  
Mahmoud Ahmed
Keyword(s):  
Wind Turbine ◽  
Fossil Fuels ◽  
Opposite Polarity ◽  
Power Grids ◽  
Energy Integration ◽  
Common Mode ◽  
Induction Generators ◽  
Common Mode Voltage ◽  
Doubly Fed Induction Generators ◽  
Doubly Fed

Wind energy integration in power grids is increasing day by day to reduce the use of fossil fuels, and consequently greenhouse gas emissions. Using the pulse-width modulated (PWM) power converters in wind turbine generators, specifically in doubly-fed induction generators, results in generating a common-mode voltage (CMV). This common-mode voltage causes a flow of common-mode current (CMC) that leaks through the stray capacitances in the generator structure. These currents impose a voltage on the generator bearing which may deteriorate them. In the current work, an active common-mode voltage canceler (ACMVC) is developed to eliminate the CMV produced by a PWM converter. The ACMVC generates a compensating voltage at the converter terminals to eliminate the CMV with a subsequent reduction of the voltage stress on the generator bearing. This compensating voltage has the same amplitude as CMV, but opposite polarity. A simulation of the ACMVC model is performed using the PSCAD/EMTDC (Electromagnetic Transient Design and Control) software package. Results confirm the effectiveness of ACMVC in canceling not only the CMV but the CMC and bearing voltage as well. In addition, the relationship between the rise time of CMV and the peak value of CMC is investigated.

scholarly journals Providing Ancillary Services with Wind Turbine Generators Based on DFIG with a Two-Branch Static Converter

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2490 ◽  
Author(s):  
Ernande Eugenio C. Morais ◽  
Francisco Kleber de A. Lima ◽  
Jean M. L. Fonseca ◽  
Carlos G. C. Branco ◽  
Lívia de A. Machado
Keyword(s):  
Wind Turbine ◽  
Reactive Power ◽  
Power Converter ◽  
Ancillary Services ◽  
Nonlinear Loads ◽  
Turbine Generators ◽  
Point Of Common Coupling ◽  
Doubly Fed ◽  
Grid Side ◽  
Controller Board

This work aims to analyze and validate through mathematical modeling and experimental results, in a three-phase three-wire electrical system, the technical viability of a static power converter with a two-level topology with only two controlled branches (2L2B), operating as a grid-side converter (GSC) in a wind turbine generator based on a doubly fed induction generator (DFIG). With this reduced-switches topology, the GSC is able to regulate the DC-link voltage level from the generator back-to-back converter and provide ancillary services of harmonic filtering and reactive power compensation from linear/nonlinear loads connected to the point of common coupling. An 8-kVA experimental prototype was implemented in the laboratory to validate the proposal. The prototype control system was realized using the dSPACE DS1103 PPC Controller Board platform programmed via MATLAB/Simulink. The effectiveness of the proposed system is verified by comparing the results obtained with the 2L2B topology to the ones with the usual two-level three-branch topology.

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