Transient performance of a large scale wind turbine HTS synchronous generator under short circuit conditions

2014 ◽  
Author(s):  
Rouhollah Shafaie ◽  
Mohsen Kalantar
Keyword(s):  
Wind Turbine ◽  
Large Scale ◽  
Short Circuit ◽  
Synchronous Generator ◽  
Transient Performance

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.

scholarly journals Parking Strategies for Vertical Axis Wind Turbines

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
F. Ottermo ◽  
S. Eriksson ◽  
H. Bernhoff
Keyword(s):  
Wind Turbine ◽  
Permanent Magnet ◽  
Thrust Force ◽  
Short Circuit ◽  
Synchronous Generator ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Permanent Magnet Synchronous Generator ◽  
Torsional Oscillations ◽  
Vertical Axis Wind Turbines

Strategies for parking a vertical axis wind turbine at storm load are considered. It is proposed that if a directly driven permanent magnet synchronous generator is used, an elegant choice is to short-circuit the generator at storm, since this makes the turbine efficiently damped. Nondamped braking is found to be especially problematic for the case of two blades where torsional oscillations may imply thrust force oscillations within a range of frequencies.

An Investigation of the Low Voltage Ride through Function of GE DFIG Wind Turbines for Electro-Mechanical Simulations

2012 ◽  
Vol 608-609 ◽  
pp. 537-542
Author(s):  
Zhao Jun Meng
Keyword(s):  
Wind Turbine ◽  
Large Scale ◽  
Low Voltage ◽  
Short Circuit ◽  
Wind Farms ◽  
Power Converter ◽  
System Stability ◽  
Total System ◽  
Detailed Model ◽  
Low Voltage Ride Through

Doubly-fed induction generator (DFIG) wind turbine has become the most widely used wind turbine in wind farms, since it presents noticeably advantages such as decoupled controls of active and reactive powers, and the use of a power converter with a rated power of 25% of total system power. As the penetration of wind power in power system increases, it is required that the wind turbine remained connected and actively contributed to the system stability during and after faults and disturbance. One common approach for a DFIG to obtain such low voltage ride through (LVRT) function is to install a crowbar circuit across its rotor terminals, which short circuit the rotor side converter when over-current is detected in the rotor. A detailed model of LVRT function normally requires electromagnetic simulations. However, the time consuming computational process is prohibitive for the studies of the integration of wind farms into large scale power systems. Electromechanical simulations are more suitable for such engineering applications. GE has incorporated the LVRT function into its recently released DFIG wind turbine model for Electro-mechanical simulations. This paper has implemented this model and verified the effectiveness of the LVRT function.

scholarly journals Research on optimization strategy of grid frequency modulation based on doubly-fed wind turbines

2020 ◽  
Author(s):  
Chao Wang ◽  
Jianyuan Xu ◽  
Liang Wang ◽  
Dan Song
Keyword(s):  
Wind Turbine ◽  
Wind Power ◽  
Wind Turbines ◽  
Frequency Modulation ◽  
Control Strategy ◽  
Large Scale ◽  
Synchronous Generator ◽  
Clean Energy ◽  
Frequency Regulation ◽  
Doubly Fed

Abstract The increasing global energy and environmental problems are encouraging to the development and utilization of renewable and clean energy in various countries. Wind power is one of the major source in large-scale renewable energy applications. However, the frequency regulation becomes a critical issue while the technology is spreading. Research on the frequency modulation (FM) technology of wind turbines and its control strategy for future power grids become significant. The paper proposes a novel coordinated frequency control strategy with the synchronous generator to solve the unmatched state between the output power of the doubly-fed wind turbines (doubly-fed induction generators) and the grid frequency, combined with the frequency response characteristics of the synchronous generator. The FM coordination strategy is formulated by the modulation coefficient from current wind speed and operation mode of each wind turbine. By coordinating the FM output of the doubly-fed wind turbine and the synchronous generator within the allowable range of frequency deviation, it will achieve the dual goal of reducing the frequency regulation pressure of the synchronous generator and indirectly reducing the abandoned wind volume of the wind turbine. The simulation is carried out on the MATLAB/SIMULINK platform. The results show that the presenting variable coefficient frequency modulation strategy could significant smooth the wind power fluctuation, and allow the reserve power of the doubly-fed wind turbine can fully engaged in frequency modulation which will reduces the frequency modulation pressure of the synchronous generator in the system.

Design and optimization of permanent magnet synchronous generator dedicated to direct-drive, high power wind turbine

2021 ◽  
pp. 0309524X2110463
Author(s):  
Dorra Abdeljalil ◽  
Mohamed Chaieb ◽  
Naourez Benhadj ◽  
Manel Krichen ◽  
Rafik Neji
Keyword(s):  
Finite Element ◽  
Wind Turbine ◽  
Permanent Magnet ◽  
High Power ◽  
Large Scale ◽  
Wind Farm ◽  
Synchronous Generator ◽  
Direct Drive ◽  
Permanent Magnet Synchronous Generator ◽  
Design And Optimization

This paper presents analysis, design, and optimization of a high-power permanent-magnet synchronous generator (PMSG). This generator is introduced in a large-scale wind turbine which can be used in a big wind farm. This generator is used in gearless configuration. The work focuses on the geometric sizing and the finite element analysis (FEA) of the PMSG. FEA is a good choice for analyzing problems over complicated domains. The flux, the electromotive force, the cogging torque, and the torque are calculated using analytical equations. Then, these parameters are obtained using finite element method (FEM) in the software FEMM and the compared with analytical results in order to validate our study. The second part presents the formulation of the optimization problem, including the optimization space, constraints, and objectives. The genetic algorithm (GA) is adopted in this design optimization in order to minimize the generator cost.

Low Voltage Ride through of Wind Turbine Based on New SGSC Converter Structure

2013 ◽  
Vol 448-453 ◽  
pp. 2185-2190 ◽  
Author(s):  
He Nan Dong ◽  
Yun Dong Song ◽  
Gang Wang ◽  
Zuo Xia Xing
Keyword(s):  
Power Systems ◽  
Wind Turbine ◽  
Control Strategy ◽  
Large Scale ◽  
Reactive Power ◽  
Low Voltage ◽  
Short Circuit ◽  
Simulation Software ◽  
Low Voltage Ride Through ◽  
Doubly Fed

The proportion of wind power in power systems is increasing year by year. Large-scale wind turbine off the grid when grid system failures. So the wind turbine needs to low voltage ride through (LVRT) function of wind turbine. Aiming at this problem, which in this article by DIgSILENT simulation software build 1.5MW doubly-fed wind turbine(DFIG) model, using active Crowbar and series grid side converter (SGSC) control strategy to realize the simulation of low voltage ride through of wind turbine. The control strategy of active Crowbar is mainly through the short circuit of rotor side converter to realize LVRT, and needs to be matched with the active and reactive power control strategy. SGSC is a novel converter structure, which mainly through compensating stator flux drop to realize LVRT. Finally this two kinds of control strategies were compared, demonstrated SGSC control strategy can achieve the low voltage ride through capabilities of the doubly-fed wind turbine.

scholarly journals Design of Optimal Real Time Emulators for Steam and Wind Turbines for Avoiding Risky Severe Conditions

2022 ◽  
Author(s):  
helmy El-Zoghby ◽  
Haitham S. Ramadan ◽  
Hassan Haes Alhelou
Keyword(s):  
Real Time ◽  
Wind Turbines ◽  
Large Scale ◽  
Short Circuit ◽  
Synchronous Generator ◽  
Fast Response ◽  
Operating Conditions ◽  
Control Approach ◽  
Three Phase ◽  
Experimental Validity

Abstract Modern energy infrastructures may face critical impacts on distributed generation and microgrids in presence of renewable and conventional energy sources. Fast restorations for these networks through proposing convenient proactive protection systems become mandatory for securing energy particularly after severe faults. This paper deals with presenting a descriptive modelling and comprehensive analysis of both steam and wind turbines using optimal real time emulators with unique testbench. Based on the dynamics of each turbine, both emulators are performed using 4kW, 180V, 1500r.p.m separately exited DC motor coupled to 2kW, 380V, 50Hz, 1500r.p.m three-phase synchronous generator. For real-time interface implementation, the mathematical models of steam and wind turbines are realized using LabVIEWTM software. The characterization and verification of both emulated steam and wind turbines are examined at different normal operating conditions in terms of steam valve position and wind speed, respectively. To regulate the current for both systems despite their diverse dynamics, a simple industrial proportional-integral (PI) controller is considered. Unlike other artificial intelligence-based controllers, the offline-controller gains are scheduled using genetic algorithm (GA) via MatlabTM software to ensure the due fast response to cope with unexpected faults. The experimental validity of both emulators is tested at the most severe abnormal operating conditions. The three-phase short circuit is considered at the generator terminals with different fault periods until reaching out-of-step conditions. From numerical analysis and experimental results, the characterization of both emulated steam and wind turbines explicitly mimics their real large-scale turbines in normal conditions. The emulators’ fast responses using the proposed GA-PI control approach are verified. Besides, the experimental dynamic behavior convergence and interoperability between the emulated and real systems for both steam and wind turbines are validated under severe conditions. The practical results confirm the fast-nature performance of the GA in avoid risky instability conditions.

Virtual Synchronous Generator Control of Power System including Large-scale Wind Farm by Cooperative Operation between Battery and LFC Hydro Power Plant

2020 ◽  
Vol 140 (6) ◽  
pp. 531-538
Author(s):  
Kotaro Nagaushi ◽  
Atsushi Umemura ◽  
Rion Takahashi ◽  
Junji Tamura ◽  
Atsushi Sakahara ◽  
...  
Keyword(s):  
Power Plant ◽  
Power System ◽  
Large Scale ◽  
Wind Farm ◽  
Synchronous Generator ◽  
Hydro Power ◽  
Virtual Synchronous Generator
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