CN210564889U - Wind turbine generator system overspeed protection system capable of generating electricity automatically - Google Patents
Wind turbine generator system overspeed protection system capable of generating electricity automatically Download PDFInfo
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- CN210564889U CN210564889U CN201920797589.0U CN201920797589U CN210564889U CN 210564889 U CN210564889 U CN 210564889U CN 201920797589 U CN201920797589 U CN 201920797589U CN 210564889 U CN210564889 U CN 210564889U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
A wind turbine generator overspeed protection system capable of generating electricity automatically belongs to the technical field of wind power. The system comprises an overspeed detection device, a control circuit power supply device and a power circuit power supply device which are respectively connected with a wind turbine generator, wherein the overspeed detection device is used for collecting and detecting speed signals of the wind turbine generator; when the wind turbine generator is overspeed, the overspeed detection device outputs a voltage V1 to enable a light emitting diode of a thyristor to be conducted, the control circuit power supply device outputs a voltage V2 to supply power to an anode and a cathode of the thyristor, the thyristor is conducted, the control relay K1 and the contactor K2 work, the power circuit power supply device outputs a voltage V3 to turn on a contracting brake of a variable pitch motor, the inverter is powered, and the variable pitch motor M is driven to complete a pitch collecting action. The overspeed of the wind turbine generator caused by the failure of a control system, the failure of a driving system and the like is solved.
Description
Technical Field
The invention belongs to the technical field of wind power, and particularly relates to a self-generating wind turbine generator overspeed protection system and a self-generating wind turbine generator overspeed protection method.
Background
At present, the phenomenon that equipment is damaged and even a wind turbine generator falls down due to overspeed frequently happens at home and abroad, and the reasons are as follows: control system failure, drive power problems, and drive system failure.
The existing overspeed protection system is mainly controlled by a wind turbine generator control system, energy is provided by a battery or a super capacitor, and oar collection under emergency is realized by a driving system. The following disadvantages exist: the control system fails, the driving power supply adopts insufficient electric quantity of a battery or a super capacitor, and the like, and the driving system fails.
Disclosure of Invention
Aiming at the technical problems, the invention provides a self-generating wind generating set overspeed protection system and a self-generating wind generating set overspeed protection method. The invention converts the kinetic energy of the rotation of the wind turbine generator into the electric energy of the emergency propeller retracting through the transmission device, realizes the control of the overspeed protection system through a hardware circuit, does not need a controller and a power supply, and is simple and reliable. The problem of control system malfunction, drive power supply problem and the wind turbine generator overspeed that causes of reasons such as drive system trouble is solved.
The purpose of the invention is realized by the following technical scheme:
the invention discloses a self-generating wind turbine generator overspeed protection system which comprises an overspeed detection device, a control circuit power supply device and a power circuit power supply device, wherein the overspeed detection device, the control circuit power supply device and the power circuit power supply device are respectively connected with a wind turbine generator, the overspeed detection device is used for collecting and detecting speed signals of the wind turbine generator, the control circuit power supply device is used for providing power for a control circuit, and the power circuit power supply device is used for opening a contracting brake of a variable pitch motor, providing power for an inverter and driving the variable pitch motor to retract a pitch;
overspeed protection control device, including thyristor, relay K1, contactor K2 and inverter, wherein:
the signal trigger end of the thyristor is connected with positive and negative electrodes V1+ and V1-of the overspeed detection device to monitor the overspeed of the wind turbine;
the cathode end of the thyristor is connected with the cathode end V2-of the control circuit power supply device through a relay K1 coil, and the anode end is respectively connected with one end of a normally open contact of a relay K1 and the control circuit power supply device V2+, so that a 24V control circuit power supply is obtained; the other end of a normally open contact of the relay K1 is connected with one end of a coil of the contactor K2 through a paddle 90-degree limit switch K3, and the other end of the coil of the contactor K2 is connected with a negative electrode end V2-of a control circuit power supply device;
one end of a group of two normally open contacts of the contactor K2 is respectively connected with a power circuit power supply device V3+ and a power circuit power supply V3-, a power circuit power supply is obtained, the other end of the power circuit power supply is respectively connected with a brake of a variable pitch motor and one end of an inverter, and the other end of the inverter is connected with the variable pitch motor;
when the wind turbine generator is overspeed, the overspeed detection device 1 outputs a voltage V1 to enable a light emitting diode of a thyristor to be conducted, a control circuit power supply device outputs a voltage V2 to supply power to an anode and a cathode of the thyristor, the thyristor is conducted, a control relay K1 and a contactor K2 work, a power circuit power supply device outputs a voltage V3 to turn on a contracting brake of a variable pitch motor, the inverter is powered, and the variable pitch motor M is driven to complete a pitch collecting action.
Preferably, a gear is arranged on a main shaft of the wind turbine generator, the overspeed detection device, the control circuit power supply device and the power circuit power supply device are respectively connected with transmission gears with different tooth numbers, each transmission gear is connected with the gear on the main shaft of the wind turbine generator and is in meshing transmission, and kinetic energy generated by rotation of the wind turbine generator is converted into electric energy through the transmission gears to provide a trigger signal, control circuit electric energy and power circuit electric energy for emergency propeller retraction in case of overspeed.
Preferably, the overspeed detection device, the control circuit power supply device and the power circuit power supply device have the same structure and respectively comprise an electromagnetic rotor, a coil, a commutator and an electric brush, wherein the coil is arranged between two different magnetic poles of the electromagnet, two terminals of the coil are respectively connected with the commutator, the commutator is connected with the electric brush, and the electromagnetic rotor is connected with the transmission gear; the overspeed detection device, the control circuit power supply device and the power circuit power supply device generate different induced electromotive forces E due to different lengths L and radiuses r of coils, different magnetic induction intensities B and different rotating speeds N of the electromagnetic rotors.
3. The invention has the beneficial effects that:
1. the generator set is respectively connected with an overspeed detection device, a control circuit power supply device and a power circuit power supply device through a transmission device, the overspeed detection device, the control circuit power supply device and the power circuit power supply device are all connected with an overspeed protection control device, the kinetic energy of the rotation of the wind turbine set is converted into electric energy through the transmission device, and a trigger signal, the control circuit electric energy and the power circuit electric energy are provided for the emergency pitch retraction in overspeed. The problem of a power supply, such as power supply failure or insufficient energy, is effectively solved; the control of the overspeed protection system is realized through the overspeed protection control device, a controller is not needed, simplicity and reliability are realized, and the problem of failure of the control system is effectively solved.
2. The invention is provided with the inverter, and forms double insurance with the original driver of the wind turbine generator, thereby avoiding the overspeed of the wind turbine generator caused by the fault of the variable pitch driver. The variable pitch motor brake circuit and the inverter circuit are arranged independently and do not affect each other. When the inverter fails, the contracting brake of the variable pitch motor can be opened, and the blades can be ensured to be retracted under the action of wind power.
Drawings
Fig. 1 is a block diagram of the present invention.
FIG. 2(a) is a schematic view of the overspeed detection apparatus of the present invention; (b) is a schematic diagram of a control circuit power supply device; (c) is a power supply device of a power circuit.
FIG. 3 is a circuit schematic of the overspeed protection control of the present invention.
Fig. 4 is a control flow diagram of the present invention.
In the figure: 1. the system comprises an overspeed detection device, 11 transmission gears I, 12 electromagnetic rotors, 13 coils, 14 commutators, 15 electric brushes, 2 control circuit power supply devices, 21 transmission gears II, 3 power circuit power supply devices, 31 transmission gears III, 4 thyristors, 5 inverters, 6 pitch motor band-type brakes, M pitch motors and K pitch motors1Relay, K2Contactor, K3Paddle 90 ° limit switch.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example (b): as shown in fig. 1, the self-generating wind turbine generator overspeed protection system of the present invention includes an overspeed detection device, a control circuit power supply device (the present invention adopts a 24V control circuit power supply device), and a power circuit power supply device, which are respectively connected to the wind turbine generator, wherein the overspeed detection device is used for acquiring and detecting a speed signal of the wind turbine generator, the 24V control circuit power supply device is used for providing a power supply for the control circuit, and the power circuit power supply device is used for opening a pitch motor band-type brake 6, providing a power supply for an inverter 5, and driving a pitch motor M to take up a pitch;
overspeed protection control device, including thyristor 4, relay K1, contactor K2 and inverter 5, wherein:
the thyristor 4 is a light-operated thyristor 4, and the signal trigger end of the thyristor 4 is connected with the positive and negative electrodes V1+ and V1-of an overspeed detection device to monitor the overspeed of the wind turbine generator;
the cathode end of the thyristor 4 is connected with the cathode end V2-of the control circuit power supply device through a relay K1 coil, and the anode end is respectively connected with one end of a normally open contact of a relay K1 and the control circuit power supply device V2+, so that a 24V control circuit power supply is obtained; the other end of a normally open contact of the relay K1 is connected with one end of a coil of the contactor K2 through a paddle 90-degree limit switch K3, and the other end of the coil of the contactor K2 is connected with a negative electrode end V2-of a control circuit power supply device;
one end of a group of two normally open contacts of the contactor K2 is respectively connected with a power circuit power supply device V3+ and a power circuit power supply V3-, a power circuit power supply is obtained, the other end of the power circuit power supply is respectively connected with one end of a variable pitch motor brake 6 and one end of an inverter 5, and the other end of the inverter 5 is connected with a variable pitch motor M;
when the wind turbine generator is overspeed, the overspeed detection device 1 outputs a voltage V1 to enable a light-emitting diode of the thyristor 4 to be conducted, the control circuit power supply device 2 outputs a voltage V2 to supply power to an anode and a cathode of the thyristor 4, the thyristor 4 is conducted, the control relay K1 and the contactor K2 work, the power circuit power supply device outputs a voltage V3 to turn on a contracting brake of the variable pitch motor, the inverter is powered, and the variable pitch motor M is driven to complete a pitch retracting action. The overspeed of the wind turbine generator caused by the failure of a control system, the failure of a driving system and the like is solved.
As shown in fig. 2, a gear is arranged on a main shaft of the wind turbine, the overspeed detection device 1, the control circuit power supply device 2, and the power circuit power supply device 3 are respectively connected to transmission gears with different numbers of teeth, each of the transmission gears i 11, ii 21, and iii 31 is connected to a gear on the main shaft of the wind turbine, and is in meshing transmission, and the kinetic energy of the rotation of the wind turbine is converted into electric energy through the transmission gears i 11, ii 21, and iii 31, so as to provide a trigger signal, control circuit electric energy, and power circuit electric energy for the emergency pitch take-up at overspeed.
The overspeed detection device 1, the control circuit power supply device 2 and the power circuit power supply device 3 have the same structure and respectively comprise an electromagnet 12, a coil 13, a commutator 14 and an electric brush 15, wherein the coil 13 is arranged between two different magnetic poles of the electromagnet 12, two terminals of the coil 13 are respectively connected with the commutator 14, and the commutator 14 is connected with the electric brush 15; the coils of the overspeed detection device 1, the control circuit power supply device 2, and the power circuit power supply device 3 are different, and the induced electromotive forces generated are different, and are E1, E2, and E3, respectively.
The working principle of the protection system of the invention is as follows:
s1: according to
Determining induced electromotive force E of each coil, wherein B is the magnetic induction intensity of the coil, L is the length of a coil wire for cutting a magnetic line of force, r is the rotating radius of the wire, and N is the rotating speed of a transmission gear, and by adjusting the magnetic induction intensity B, the length L of the coil wire, the rotating radius r of the wire and the rotating speed N of the transmission gear, a preset output voltage V is obtained, and the output voltage V is ensured to be within a reasonable range; the magnetic induction intensity of the coils of the overspeed detection device 1, the control circuit power supply device 2 and the power circuit power supply device 3 is respectively B1, B2 and B3, the lengths of the coil leads cutting magnetic lines of force are respectively L1, L2 and L3, the rotating radiuses of the leads are respectively r1, r2 and r3, the rotating speeds of transmission gears are respectively N1, N2 and N3, and the preset output voltages are respectively V1, V2 and V3 obtained through the formulas;
s2: setting the overspeed range of the wind turbine generator as N1-N2;
when the rotating speed N of the wind turbine generator is equal to the overspeed set value N1Output voltage V of coil of overspeed detector1Equal to the turn-on voltage V of the light-emitting diode of the thyristor of the overspeed protection control devicek；
When the overspeed range of the wind turbine generator is N1-N2, the output voltage V of the coil of the power supply device of the control circuit2In the range of relay K1And contactor K2The operating voltage range of the coil; output voltage V of power circuit power supply device coil3The range of the variable-pitch motor is the working voltage range of the inverter and the variable-pitch motor brake;
s3: judgment V1＞VkIs there any?
When the rotating speed N of the wind turbine generator is less than the overspeed set value N1Output voltage V of coil of overspeed detector1Less than the turn-on voltage of the thyristor light-emitting diodeVkThe thyristor is turned off;
when the rotating speed N of the wind turbine generator is greater than the overspeed set value N1Output voltage V of coil of overspeed detector1Greater than the turn-on voltage V of the thyristor light-emitting diodekThe output voltage V2 of the control circuit power supply device 2 supplies power to the anode and the cathode of the thyristor 4, the thyristor 4 is conducted, and the relay K1Get electricity, relay K1Closing the normally open contact;
s4: judgment of K3Is closed?
When relay K1When the normally open contact is closed and the paddle does not reach the 90-degree position, the paddle 90-degree limit switch K3When closed, contactor K2The coil is electrified, the normally open contact is closed, and the output voltage V of the coil of the power circuit power supply device3Supplying power to an inverter and a variable pitch motor brake, opening the variable pitch motor brake, and driving the variable pitch motor to retract the pitch by the inverter;
when the blade reaches the 90-degree position (namely, the direction of the blade is consistent with the direction of the wind direction), the 90-degree limit switch K of the blade3Open, contactor K2When the coil is power-off, its normally open contact is cut off, and the output voltage V of power circuit power supply device coil3And stopping supplying power to the inverter and the pitch control motor brake 6, stopping driving the pitch control motor M to close the pitch by the inverter 5, and braking the pitch control motor brake.
Claims (3)
1. The utility model provides a wind turbine generator system overspeed protection system from electricity generation which characterized in that:
the system comprises an overspeed detection device, a control circuit power supply device and a power circuit power supply device which are respectively connected with a wind turbine generator, wherein the overspeed detection device is used for collecting and detecting speed signals of the wind turbine generator, the control circuit power supply device is used for providing power for a control circuit, and the power circuit power supply device is used for opening a variable pitch motor brake, providing power for an inverter and driving the variable pitch motor to retract a pitch;
overspeed protection control device, including thyristor, relay K1, contactor K2 and inverter, wherein:
the signal trigger end of the thyristor is connected with positive and negative electrodes V1+ and V1-of the overspeed detection device to monitor the overspeed of the wind turbine;
the cathode end of the thyristor is connected with the cathode end V2-of the control circuit power supply device through a relay K1 coil, and the anode end is respectively connected with one end of a normally open contact of a relay K1 and the control circuit power supply device V2+, so that a 24V control circuit power supply is obtained; the other end of a normally open contact of the relay K1 is connected with one end of a coil of the contactor K2 through a paddle 90-degree limit switch K3, and the other end of the coil of the contactor K2 is connected with a negative electrode end V2-of a control circuit power supply device;
one end of a group of two normally open contacts of the contactor K2 is respectively connected with a power circuit power supply device V3+ and a power circuit power supply V3-, a power circuit power supply is obtained, the other end of the power circuit power supply is respectively connected with a brake of a variable pitch motor and one end of an inverter, and the other end of the inverter is connected with the variable pitch motor;
when the wind turbine generator is overspeed, the overspeed detection device (1) outputs a voltage V1 to enable a light emitting diode of a thyristor to be conducted, a control circuit power supply device outputs a voltage V2 to supply power to an anode and a cathode of the thyristor, the thyristor is conducted, a control relay K1 and a contactor K2 work, a power circuit power supply device outputs a voltage V3 to turn on a contracting brake of a variable pitch motor, the inverter is powered, and the variable pitch motor M is driven to complete a pitch collecting action.
2. The self-generating wind turbine generator overspeed protection system according to claim 1, characterized in that: the main shaft of the wind turbine generator is provided with a gear, the overspeed detection device, the control circuit power supply device and the power circuit power supply device are respectively connected with transmission gears with different tooth numbers, each transmission gear is connected with the gear on the main shaft of the wind turbine generator and is in meshing transmission, and kinetic energy of the rotation of the wind turbine generator is converted into electric energy through the transmission gears to provide a trigger signal, control circuit electric energy and power circuit electric energy for emergency propeller retracting in overspeed.
3. The self-generating wind turbine generator overspeed protection system according to claim 1, characterized in that: the overspeed detection device, the control circuit power supply device and the power circuit power supply device have the same structure and respectively comprise an electromagnetic rotor, a coil, a commutator and an electric brush, wherein the coil is arranged between two different magnetic poles of the electromagnet, two terminals of the coil are respectively connected with the commutator, the commutator is connected with the electric brush, and the electromagnetic rotor is connected with a transmission gear; the overspeed detection device, the control circuit power supply device and the power circuit power supply device generate different induced electromotive forces E due to different lengths L and radiuses r of coils, different magnetic induction intensities B and different rotating speeds N of the electromagnetic rotors.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110195684B (en) * | 2019-05-30 | 2023-12-29 | 沈阳工程学院 | A self-generated wind turbine overspeed protection system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195684B (en) * | 2019-05-30 | 2023-12-29 | 沈阳工程学院 | A self-generated wind turbine overspeed protection system and method |
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Effective date of registration: 20250710 Address after: 110136 Liaoning Province, Shenyang City, Shenbei New District, Shenbei Road No. 76-40 Patentee after: SHENYANG JIAYUE ELECTRIC POWER TECHNOLOGY CO.,LTD. Country or region after: China Address before: Shenbei New Area Puchang road Shenyang City, Liaoning province 110136 No. 18 Patentee before: SHENYANG INSTITUTE OF ENGINEERING Country or region before: China |