https://profdoc.um.ac.ir/articles/a/1019691.pdf

Static and dynamic wind turbine simulator using a converter controlled dc motor

The paper presents the development of a wind turbine simulator which consists of an induction motor driven by a torque control inverter. The wind turbine simulation system includes wind speed simulation, mathematical models of wind turbines, modeling of rotor blade characteristics, modeling of tower effect and emulation of rotor inertia. Wind speed can be easily programmed based on Van der Hoven spectrum, or recorded wind speed data or manual set up. The developed algorithms were implemented by a low-cost, high-performance digital signal controller with C language and the system was tested in a laboratory with a 1 kW dc generator. The power responses, torque responses and tip speed ratio responses confirms that the system can perform satisfactorily under step changes of power reference, load disturbances and tower effect.

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Development of a Wind Turbine Simulator for Wind Generator Testing

Open loop wind turbine emulator

The paper presents the development of wind turbine emulator which consists of an induction motor, torque inverter and real-time interface card. The wind turbine emulator system includes wind speed profiles, mathematical model of wind turbines, modeling of rotor blade characteristics and modeling of rotor inertia. Wind speed can be easily programmed based on white noise random model, or recorded wind speed or manual speed reference. The developed algorithm was implemented by DS1104 real-time interface card and Matlab/Simulink realtime control programming. The wind turbine emulator was tested in laboratory with 1 kW separate excited dc generator. The power responses, torque responses and wind speed responses confirm that the system can perform satisfactorily under step commands, wind speed profiles and rotor blade sizes.

Real-time wind turbine emulator for testing wind energy conversion systems

In this paper, a new wind turbine simulator using a squirrel cage induction motor for both steady state and transient conditions. The turbine static characteristics are modeled using the relation between the turbine power versus the wind speed and the blade pitch angle. The turbine performance is subjected to a real wind speed pattern by modeling the wind speed as a sum of harmonics with wide range frequencies. The turbine model includes the effect of the tower shadow and wind shear. A pitch angle controller is designed and used to protect the coupled generator by limiting the turbine output power to the rated value. High inertia blades are also simulated instead of the low actual turbine inertia. Experimental results are presented to verify the wind turbine simulator performance.

A new wind turbine simulator using a squirrel-cage motor for wind power generation systems

Control algorithms and implementation issues for a wind turbine simulator are presented for realistic emulation of variable characteristics of wind and rotor blades using a lab-scale motor and generator set A randomized wind speed pattern is generated with given average speed and turbulence coefficient Aerodynamic characteristics of rotor blade are considered as a real-time function of rotating speed and wind speed Periodic pulsations of torque are also included as a tower effect In addition, arbitrary size of inertia can be emulated instead of actual rotor blade inertia using the proposed algorithm of electronic inertia compensation Proposed algorithms are verified by the computer simulations and experiments using a hardware-in-loop wind turbine simulator

Emulation of output characteristics of rotor blades using a hardware-in-loop wind turbine simulator

Control algorithms and implementation issues for a wind turbine simulator are presented for realistic emulation of variable wind characteristics using a lab-scale motor and generator set. When the average wind speed and turbulence level is given, the torque reference of prime mover is decided through various blocks, such as random wind speed generator, blade characteristic curves, and tower effect compensation. The variable nature of wind can be implemented and tested by not only the computer simulation but also the hardware-in-loop-simulator (HILS). Some application examples of HILS include the development and test of turbine control software for more efficient and stable operation. Feasibility of the proposed simulator has verified by computer simulations and experiments.

Emulation of Rotor Blade Characteristics Using A Wind Turbine Simulator

A purpose of the present invention is to provide a wind power generator for preventing overspeed damage, capable of predicting an overvoltage by measuring the inclination of a voltage delivered from a wind power generation part, and preventing electric damage to a wind power control part by consuming energy through a resistor in accordance with an inclination value. To achieve the purpose, the wind power generator for preventing overspeed damage includes: a power generation part generating power through a blade; a power conversion part including a rectification part converting an alternating current of the power generation part into a direct current, a converter part delivering the direct current to a load or a battery, a DC link capacitor formed between the rectification part and the converter part, and a dynamic braking circuit part formed between the rectification part and the DC link capacitor, and selectively operated while consuming the direct current; and a control part measuring the voltage of the DC link capacitor, and controlling the dynamic braking circuit part to make the voltage of the DC link capacitor maintained at no more than a predesignated value.

Prevent overspeed wind power generator

An object of the present invention is to provide a power generation system which estimates a rotational speed of a generator by calculating at least one waveform of voltage or current transmitted from a generator at an input terminal of a power conversion unit, and controls the power converter unit based on the expected speed. In order to achieve the above object of the present invention, the power generation system comprises: a generator generating electric energy; a power conversion unit having one end connected to the generator, and the other end connected to a load, and converting output power of the generator into direct current or alternating current to transmit the same to the load; a filter unit provided between the generator and the power conversion unit; a sensing unit measuring at least one of voltage or current of the filter unit; and a control unit calculating an estimate of a rotational speed of the generator based on output of the sensing unit and controlling the power conversion unit based on the estimated rotational speed of the generator.

Jeong-Hun Oh

Papers

Emulation of output characteristics of rotor blades using a hardware-in-loop wind turbine simulator

Emulation of Rotor Blade Characteristics Using A Wind Turbine Simulator

Prevent overspeed wind power generator

Power generation system