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INVENTION
Russian Federation Patent RU2287718
Windmills
Name of the inventor: Banin Roman V. (RU); Kutepov Vladimir (RU)
The name of the patentee: Federal State VPO "Chelyabinsk State University Agroengineering" (RU)
Address for correspondence: 454080, Chelyabinsk, Lenina 75, Chelyabinsk State Agroengineering University, Department "Electrical machines and maintenance of electric equipment in agriculture."
Starting date of the patent: 2005.05.18
The invention relates to wind energy and can be used in stand-alone power supply systems using renewable energy, and for the supply of submersible pumps and other electrical consumers. The technical result is to increase the functional installation capabilities, increasing the efficiency, reliability and quality of electricity. The wind power plant comprises gear differential gear, wind turbine speed sensor of a wind turbine, a DC machine, voltage inverter, battery, field controller, block off the excitation and the electrical load. The electrical load is connected to the inverter voltage, which is connected to the DC machine, driven by the wind turbine. Energy storage is a battery. When there is wind machine produces DC power, which is supplied to an electrical load through a power inverter. Simultaneously recharged battery. When the wind is weak or absent, a block off the excitation prevents battery discharge to the coil excitation DC machine.
DESCRIPTION OF THE INVENTION
The invention relates to the energy sector, in particular to a self-contained power supply systems using renewable energy to power submersible pumps and other electrical load for garden plots, small farms and other similar objects.
Known unit Gasoline AB-1-0 / 230 (see para. Alekseev, AP et al., "Diesel and gasoline generating sets and stations." M., "Mechanical Engineering", 1973, at p.22) for food single-phase AC voltage of 220 V. The unit can be used on garden plots to supply submersible motor up to 250 W, voltage 220 V. The disadvantage is the complexity of the design as a whole and its components. This entails a significant cost of the unit, which may not be available amateur gardener or the small scale farmers in the absence of centralized power.
The closest in technical essence and attainable effect to the proposed technical solution is a wind power installation (Russian patent RU 2210854 the C2, H 02 P 9/06, H 02 P 9/42, F 03 D 9/02, publ. 2003.08.20 ) comprising a toothed differential transmission links are mechanically connected to the turbine shaft, the shaft of the alternator, and an adjustable DC machine respectively. Anchor regulated DC machine is electrically connected to the second anchor DC machine is mechanically connected to the alternator shaft. The second machine has an additional DC excitation winding connected to the amplifying device. Input of the latter connected to an output controller, one input of which is connected to the output of the speed generator, and the other - to the output of the adder. Login shaper rate connected to the output shaft speed sensor of a wind turbine, a second input of the adder connected to an active power setpoint.
The disadvantages of wind turbine are:
1. Low efficiency and reliability;
2. The oscillation frequency of the output voltage;
3. The emergence of the generator unbalanced load when feeding a single-phase electroconsumer;
4. Inability to stand-alone power electrical load during periods of calm.
This reduces the efficiency of the wind power plant, and limits the scope of its application.
The object of the present invention is to expand the functionality of the wind power plant by ensuring the autonomy of electrical load power during the period of calm, increasing efficiency, reliability and quality of electricity.
The problem is solved in that the wind power installation comprising a toothed differential transmission having an input operatively connected to the shaft of a wind turbine, and the first and second output - with a sensor shaft speed wind turbine and generator, respectively, by the fact that the generator is a machine DC connected to set voltage of the inverter, battery, controller and drive unit driving off. The power output of the DC machine is connected to the input voltage of the inverter having output the electrical load, the battery and the input field controller. Out last is connected to the first input of the off field, the second input unit off drive is attached to the output shaft speed sensor of a wind turbine. Output field trip unit is connected to the terminals DC excitation winding machine.
It is possible to increase the efficiency of the wind power installation by reducing the number of electric cars.
Reducing the output voltage obtained using the oscillation frequency of the inverter voltage, having a clock generator with frequency stabilization. This is especially important if the load is used as an electrical submersible motor vibration type. From the supply voltage frequency stability greatly depends on the performance and the pressure of the electric pump.
Exception asymmetric mode alternator when operating on a single phase submersible motor achieved by using as a DC generator and a single-phase inverter of the machine, which is removed from the output alternating voltage.
Self-powered electrical load during periods of calm is achieved using a voltage inverter together with the battery, playing the role of energy storage.
According to the authors reportedly set of essential features that characterize the essence of the claimed invention is not known from the prior art that can be concluded according to the invention, the criterion of "novelty".
According to the authors, despite the fact that the elements making up the wind power plant, are known in the art, but a new combination of features, namely the use as a generator machine DC setup voltage inverter and the battery and their interrelation and properties, which in this case are shown, possible to obtain a technical result as increasing the efficiency of the wind power plant and its reliability, reducing the frequency fluctuations of the output voltage, the asymmetrical exception generator load power is a single phase at electroconsumer not known and not explicitly follow the prior art, i.e. was not known causal link above features and technical results obtained, which allows to conclude that the technical solution to the criterion "inventive step".
The set of essential features that characterize the essence of the invention, in principle, can be repeatedly used in industry and agriculture to produce a technical effect is to ensure the autonomy of the power electroconsumer during periods of calm that makes software to achieve this goal - the expansion of the functionality of the wind power plant, which allows us to conclude that the invention, the criterion of "industrial applicability".
Brief Description of the drawing, which shows a block diagram of a wind power plant.
The wind power plant comprising two toothed differential transmission, wherein the input shaft is mechanically connected to the windmill 1 and the first and second output - with three sensor shaft speed and a wind turbine generator 1 respectively. The generator is a machine DC connected to the set voltage of the inverter 8, the battery 6, field controller 5 and block 4 off excitation, the DC power output of the machine 7 is connected to the input voltage of the inverter 8, having output the electrical load 9, the battery 6 and input excitation regulator 5. The output of the last connected to the first input of the 4 off excitation, the second input of which is connected to the output of the sensor 3, the frequency of rotation of a wind turbine unit 1. Exit 4 off excitement attached to the terminals of the machine field winding 7 DC.
Windmills WORKS AS FOLLOWS
The rotation of the wind turbine 1 is transmitted through the differential gear on the shaft of the machine 7 DC 3 and the sensor shaft speed wind turbine 1. If the value of the output of the sensor 3 speed signal does not reach the set value, the unit 4 does not disable the drive energizes the excitation winding machines 7 DC current. Power electric load 9 is performed by the battery 6 through 8. He voltage inverter converts the voltage of the battery 6 to AC voltage corresponding to the passport of the electrical load 9. When you reach a certain speed of the output signal coming from the sensor 3 speed shaft of the wind turbine 1, is sufficient to operate the unit 4 off the generator excitation 1 dc. It applies a voltage to the excitation winding machine 7 DC from the battery controller 6 through the driving machine 5. The output 7 a DC voltage appears, which is used to power the electric load 9 and charge the battery 6. With a further increase shaft speed wind turbine controller 1 5 supports the excitation voltage on the DC output car 7 within the prescribed limits.
By reducing the wind speed is below the threshold value at the output shaft speed sensor 3 wind turbine 1 block off 4 driving machine 7 DC disconnects power circuit winding its excitation. This prevents discharge the battery 6 to the excitation winding DC machine 7 during the calm.
Using the scheme of DC machines can improve the efficiency and reliability of wind power installation.
Using voltage inverter with an internal clock generator to the frequency stabilization minimizes the frequency fluctuation of the output voltage.
Using the DC machine and the inverter voltage eliminates asymmetric mode of the wind power plant with single-phase power consumers.
Battery Application enables autonomous power supply reliability.
Consequently, the proposed wind power plant can achieve this goal, ie, improve the efficiency and reliability of wind power plant, to improve the quality of electric power, to ensure self-powered electrical load during the period of calm in the absence of centralized power.
CLAIM
Wind power installation comprising a toothed differential transmission the input of which is mechanically connected to the shaft of a wind turbine, and the first and second output - with the speed sensor shaft turbine and generator respectively, wherein the generator is a machine DC connected to set the inverter voltage, the battery , regulator of excitation and block off the excitation, the power output of the machine DC is connected to the voltage input of the inverter having the output electrical load, battery and input excitation regulator output connected to the first input of the off field, the second input of which is connected to the output speed sensor the rotation shaft of a wind turbine, and output excitation shutdown unit is connected to the terminals DC excitation winding machine.
print version
Publication date 17.12.2006gg
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