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INVENTION
Russian Federation Patent RU2133375
CONTROL METHOD Wind Turbine
Name of the inventor: AV Chebodayev .; Bastron AV
The name of the patentee: Krasnoyarsk State Agrarian University
Address for correspondence: 660130, Krasnoyarsk, Slovtsov 16 kv.74, Bastron AV
Starting date of the patent: 1998.03.05
The invention relates to industry and agriculture, in particular to wind power, and is intended for the conversion of wind energy into electrical energy. The technical result - increasing the number and quality of electric energy produced by the wind power installation, function, application of asynchronous multi-speed motors as generators. This is achieved by the connection of electrical loads to the asynchronous n-pole motor, adopted as a generator of electricity, produce, depending on the energy production of the wind power installation, in this case when the speed value that exceeds the minimum synchronous frequency when connecting n-pole induction motor the maximum number of poles of the generator is connected a battery of capacitors and corresponding minimum load in accordance with the generated wind power installation energy, and with an increase in the generator shaft speed when a speed value exceeding the following synchronous frequency when connected n-pole induction motor with the following number of poles , connect an additional capacitor bank and an additional burden, proper installation of energy generated by wind power.
DESCRIPTION OF THE INVENTION
The invention relates to industry and agriculture, in particular to wind power, and is intended for the conversion of wind energy into electrical energy.
It is known that an induction motor can be used as an alternator.
The disadvantage of this scheme is to work asynchronous motor as a generator at only one speed.
Known wind power unit AVEU-B, consisting of wind power unit, electric pump unit, sensor power output, the switching device having a multi-level comparator. Electric pump unit comprises at least two pumps, a switching device is designed as a controlled keys, the number of which equals the number of pumps. Depending on the wind speed and energy produced each with one or more pumps, power consumption which corresponds generated.
The disadvantages of this setup is a complex scheme of frequency regulation of electric networks for electric power and as a consequence, the high cost and complexity of use in agriculture.
As a prototype avtovetroelektrostantsiya taken to speed loading, comprising a wind turbine designed for a minimum of two power generators, themselves generators and system boot speed and orientation of the wind. A method of loading speed is dependent on the wind speed, which is connected with an increase in additional generators corresponding power supplied from a wind turbine.
The disadvantages are the high cost of the prototype, a complex mechanical design and control scheme difficult to use it in agriculture.
The object of the invention is to increase the quantity and quality of the electrical energy produced by the wind power installation, function, application of asynchronous multi-speed motors as generators.
This problem is solved by the fact that unlike the prototype, connect the electrical load to the asynchronous n-pole motor, adopted as a generator of electricity, produce, depending on the energy production of the wind power installation, in this case when the speed value that exceeds the minimum synchronous frequency at connected n-pole induction motor with a maximum number of poles, the generator is connected capacitor bank and appropriate minimum load in accordance with the generated wind power installation of energy, and with the increase of the generator shaft speed when the speed value exceeds the following synchronous frequency when connecting n-pole asynchronous motor with the following number of poles, connect the additional capacitor bank and an additional load corresponding energy produced wind power installation.
Wind power plant control method is explained using the device shown in FIG.
The drawing shows a perspective view of the device.
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The wind power plant includes a wind turbine 1, connected through the transfer device 2 with an asynchronous multi-speed motor 3, the windings of which are connected by one of three schemes / star, a triangle, a double star / depending on the switch speed of 4, including their contacts 4 / 4a, 4b, 4c / according to the rotor speed corresponding magnetic actuators 5, 6, 7, 8. when the rotor speed, at 1000 rev / min, the speed relay contact 4 4a 5 include a magnetic switch that will connect a delta winding and when the rated frequency rotation of the motor rotor, equal to 750 rev / min, the engine will generate electrical energy by means of a battery of capacitors 9, generating a capacitive excitation current. At the same point in time via make contacts magnetic starter 5 includes magnetic switch 10 that connects the minimum load 11. The increase in the wind speed at which the rotor speed exceeds the rated speed, when connecting the windings in a double star, ie 1000 rpm , speed switch 4 disconnects magnetic switch contact 4a and 5 include magnetic actuators 6 and 7 pin 4b which connect the motor windings in a double star with optional battery capacitor 12, the engine in this case will produce more electricity than in the first case. At the same point in time through the closing contact magnetic switch 7 is switched magnetic switch 13 that connects the minimum load 14. When the rotor speed exceeds the rated speed when connecting windings in star, ie, 1500 rpm, 4 speed relay disconnects magnetic actuators 6 and 7 include contact 4b and the magnetic contactor 8 pin 4, which connects the motor windings in star with an extra battery capacitor 15, which would correspond to the maximum power output. At the same point in time through the closing contact of the magnetic contactor 8 is turned on magnetic switch 16 that connects the minimum load 17. The amount generated by the wind power installation of electricity increases due to the use of an asynchronous motor with multi-shift number of pole pairs and the rational use of energy of the wind flow. |
The method of the wind power plant control can be easily implemented in manufacturing as asynchronous multispeed motors and all auxiliary equipment is widely used in the industry.
CLAIM
A method for controlling a wind power installation, consisting of wind turbine gear unit and generator of electricity, in which as a control parameter using the shaft speed of the generator, characterized in that the connection of the electrical load to the asynchronous n-pole motor, adopted as a generator of electricity, produce depending on the produced wind energy power plant, at the same time when the speed value that exceeds the minimum synchronous frequency when connecting n-pole induction motor with a maximum number of poles, the generator is connected capacitor bank and appropriate minimum load in accordance with the generated wind power installation of energy, and with increasing frequency generator shaft rotation speed when the value exceeds the following synchronous frequency when connecting n-pole induction motor, with the following number of poles, connect the additional capacitor bank and an additional burden, proper installation of energy generated by wind power.
print version
Publication date 11.01.2007gg
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