Emulation of the static and dynamic behaviour of a wind-turbine with a DC-machine drive

Rabelo, B.; Hofmann, W.; Glück, Martin

doi:10.1109/pesc.2004.1355443

Cited by 39 publications

(33 citation statements)

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“…A graph showing these regions of operation is shown in figure 1 The mechanical model of the turbine system as a whole (usually including the gearbox and appropriate shafts) are also important. There are existing models including higher order effects such as shaft elasticity and gearbox inertia ( [7] [8], [9], [10], [11]), often referred to as "two-mass" or "threemass models", depending on how many significant mechanical components are included in the model. It was determined early in development of the emulator that including these effects in our turbine model was beyond the scope of this project and thus they are neglected.…”

Section: Literature Surveymentioning

confidence: 99%

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Emulation of a 1.5MW wind turbine with a DC motor

Hardy

Jewell

2011

2011 IEEE Power and Energy Society General Meeting

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Abstract-In order to provide a testing environment for generator control strategies, a wind turbine emulator was developed. First, a mathematical model was developed for the a 1.5MW wind turbine generator based on available modeling data. Using this data a function relating maximum power output and wind speed was developed along with a one-mass model of the turbine. The model was implemented in a software simulation along with controllers for a DC motor acting as the wind turbine and a dynamometer acting as the generator. The software simulation was implemented in LabVIEW and read in a data file containing high sample rate (20 Hz) wind speed data, calculated the optimal power from that wind speed, and generated control signals for the DC motor and dynamometer.The effectiveness of the controller was found by calculating the mean-square error between the optimal power calculated by the simulation turbine model and the actual power produced by the DC motor/dynamometer combination. Two 800 second wind speed data files were used as test inputs for the emulator: a lowspeed low-frequency wind profile and a turbulent or varyingspeed wind profile. The results of the controller development using these two wind speeds show that the turbine inertia is a significant factor in following the optimal power output of a wind turbine. The time constant of the generator speed-tracking function specified in the modeling data also plays a significant role in how quickly the system can respond to changes in wind speed.

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Section: Literature Surveymentioning

confidence: 99%

“…( [3], [5], [7], [8], [10], [14], [15], [16], [17]). To produce the mechanical power, the most common type of motor used was the DC motor due to the direct relationship between motor torque and rotor current.…”

Section: Literature Surveymentioning

confidence: 99%

Emulation of a 1.5MW wind turbine with a DC motor

Hardy

Jewell

2011

2011 IEEE Power and Energy Society General Meeting

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“…However, static modeling is unable to reflect the different dynamic aspects of a wind turbine which is a crucial concern during operation. In published research, dynamic aspects are incorporated with the WT model using different approaches, including elastic model of the turbine shaft [16], mechanical balance equation for the turbine torque [8,17], combination of the aerodynamic, oscillatory and dynamic torque [18]. Passive pitching mechanism and rotor blade inertia have been considered with the wind turbine model which leads to more generalized approach for a small wind turbine emulator system [7].…”

Section: Wind Turbine Modelmentioning

confidence: 99%

Development of an Isolated Small Wind Turbine Emulator

Arifujjaman¹

2011

TOREJ

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An isolated small wind turbine emulator based on a separately excited DC motor is developed to evaluate the performance of small wind turbine control strategies. The test rig consists of a 3HP separately excited DC motor coupled to a synchronous generator. A dump load is connected to the generator through a buck-boost converter controlled by a microcontroller. Wind turbine rotor and furling dynamics are incorporated in the emulator with the use of a PC based wind turbine model. Emulation of the wind turbine is achieved by running the DC motor to track the theoretical rotational speed of the wind turbine rotor. A dynamic maximum power controller is implemented and tested. The controller uses the wind speed and rotor speed information to control the duty cycle of the buck-boost converter in order to operate the wind turbine at the optimum tip speed ratio. Test results indicate that the proposed system accurately emulates the behavior of a small wind turbine system.

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“…Usually -and it is also the case chosen in this chapter -it is considered that IPS and EPS interact by means of the rotating high-speed shaft. Thus, the RTPS physical part is based on a rotating electrical machine (servomotor), either DC motors (Battaioto et al, 1996;Rabelo et al, 2004), or AC machines offering similar performances (Steurer et al, 2004;Munteanu et al, 2005). The IPS is typically based on synchronous or induction machine and may include power electronics converters and control systems in order to implement the variable-speed operation.…”

Section: Fig 1 Original Plant To Simulate Illustrating the Interactmentioning

confidence: 99%