CN111024976A - Measuring method and measuring device for rotary power generation equipment and impeller measuring system - Google Patents
Measuring method and measuring device for rotary power generation equipment and impeller measuring system Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention provides a measuring method and a measuring device for a rotary power generating device and an impeller measuring system. The rotary power generating apparatus includes an electrical slip ring, and the measuring device includes: an induction code wheel (30) mounted on the rotor side of the electrical slip ring and having a plurality of first apertures (12) arranged on a first circumference; a first sensor (10) mounted at a position corresponding to a first circumference of a stator side of the electrical slip ring and providing a first pulse signal for measuring a rotational speed of the rotary electric power generating apparatus by coupling with a plurality of first apertures (12) of the sensing code wheel (30).
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a measuring method and a measuring device of rotary power generation equipment and an impeller measuring system.
Background
At present, an electric variable pitch wind turbine generator is limited by structures in the wind power industry and all needs to use an electric slip ring. The electrical slip ring provides two functions of power transmission and communication transmission.
Sensor solutions for measuring the rotational speed of the impeller by means of a sensor and an inductive encoder have been widely used. The sensing code disc arranged on the impeller bearing has large size, and the sensor is arranged at a fixed position of the engine room. The slip ring generally does not relate to the measurement technology of the rotating speed of the impeller, and the prior art adopts the method that an induction coded disc is arranged on the side of an electric slip ring stator, and a sensor is arranged on the side of an electric slip ring rotor. And a sensor at the rotor side of the electric slip ring is connected into a variable pitch system of the impeller, and only the pulse counting function can be realized.
In the existing impeller rotating speed measuring technology of the sensor and the induction coded disc, the induction coded disc is large in size, unreliable factors such as installation tolerance and the like cause large measuring rotating speed error and poor reliability, and meanwhile, the impeller position calibration cannot be realized due to the fact that the induction coded disc and the corresponding sensor are not installed in the impeller zero calibration mode.
Disclosure of Invention
The embodiment of the invention provides that a sensor is arranged on the side of an electric slip ring stator of rotary power generation equipment and is connected into a control system of the rotary power generation equipment, so that the functions of measuring the rotating speed of the whole machine and protecting the rotating speed can be realized.
According to an embodiment of the invention, there is provided a measuring device for a rotating electrical power generating apparatus including an electrical slip ring, the measuring device comprising: the induction coded disc is installed on the rotor side of the electric slip ring and is provided with a plurality of first openings arranged on a first circumference; a first sensor mounted on a stator side of the electrical slip ring at a position corresponding to a first circumference and providing a first pulse signal for measuring a rotational speed of the rotary power generating apparatus through coupling with the first plurality of openings of the sensing code wheel.
In the measuring device, the first sensor may be connected to an overspeed protection module configured to count the first pulse signal provided by the first sensor per unit time, obtain a count value, and provide protection for the rotating power generation equipment based on a comparison of the count value with a predetermined threshold.
In the measuring device, the sensing code wheel may have a second aperture disposed on a second circumference, and the measuring device further includes: and the second sensor is arranged at a position corresponding to a second circumference on the stator side of the electric slip ring and provides a second pulse signal through coupling with a second opening of the induction code disc, the initial position is calibrated through the first pulse signal and the second pulse signal, and the current position and the number of rotations are determined, wherein the first circumference and the second circumference have different radiuses.
In the measuring device, the sensing code wheel may have a protrusion disposed on a second circumference, and the measuring device further includes: and the second sensor is arranged at a position corresponding to a second circumference on the stator side of the electric slip ring, is connected to the speed measuring module, provides a second pulse signal through coupling with the protrusions of the induction coded disc, and calibrates an initial position and determines the current position and the number of rotations through the first pulse signal and the second pulse signal, wherein the radius of the first circumference is different from that of the second circumference.
In the measuring apparatus, the measuring apparatus may include: the first sensors are respectively arranged at different positions corresponding to the first circumference on the stator side of the electric slip ring; and a plurality of first sensors are connected to an overspeed protection module of the rotary power plant, the overspeed protection module performing a verification of the first sensors by comparing a difference between measurements of at least two of the first sensors.
In the measuring apparatus, the measuring apparatus may include: the second sensors are respectively arranged at different positions on the stator side of the electric slip ring corresponding to the second circumference and used for calibrating a plurality of initial positions; and a plurality of second sensors are connected to an overspeed protection module of the rotary power plant, the overspeed protection module performing a verification of the second sensors by comparing a difference between measurements of at least two of the second sensors.
According to an embodiment of the present invention, there is provided a measuring method of a rotary electric power generating apparatus including an electric slip ring, the measuring device having an induction code wheel mounted on a rotor side of the electric slip ring, the induction code wheel having a plurality of first openings provided on a first circumference, a first sensor being mounted on a stator side of the electric slip ring at a position corresponding to the first circumference, the method including: providing a first pulse signal for measuring a rotational speed of the rotary power unit via a coupling between the first sensor and a first plurality of apertures of the inductive code wheel.
The method may further comprise: the first pulse signal provided by the first sensor is counted in a unit time, a count value is obtained, and protection of the rotating power generation equipment is provided based on comparison of the count value with a predetermined threshold value.
The inductive code wheel may have a second aperture disposed on a second circumference, and a second sensor disposed at a position corresponding to the second circumference on a stator side of the electrical slip ring, wherein radii of the first circumference and the second circumference are different, the method further comprising: and a second pulse signal is provided through the coupling between the second sensor and the second opening of the induction code disc, the initial position is calibrated through the first pulse signal and the second pulse signal, and the current position and the number of rotations are determined.
The inductive code wheel may have a protrusion disposed on a second circumference, and a second sensor is disposed at a position corresponding to the second circumference on a stator side of the electrical slip ring, wherein radii of the first circumference and the second circumference are different, the method further comprising: and a second pulse signal is provided through the coupling between the second sensor and the bulge of the induction code disc, the initial position is calibrated through the first pulse signal and the second pulse signal, and the current position and the number of rotations are determined.
The first sensor may comprise a plurality of the first sensors respectively arranged at different positions corresponding to a first circumference of a stator side of the electrical slip ring, and the method further comprises: the verification of the first sensor is performed by comparing the difference between the measured values of at least two of said first sensors.
The second sensor may include a plurality of second sensors respectively disposed at different positions corresponding to a second circumference of a stator side of the electrical slip ring, and the method further includes: the plurality of initial positions is calibrated by a plurality of second sensors, and a verification of the second sensors is performed by comparing the difference between the measured values of at least two of said second sensors.
According to an embodiment of the invention, there is provided an impeller measuring system of a wind turbine generator system, the impeller measuring system including an electrical slip ring, the measuring device including: the induction coded disc is installed on the rotor side of the electric slip ring and is provided with a plurality of first openings arranged on a first circumference; a first sensor installed at a position corresponding to a first circumference of a stator side of the electric slip ring and providing a first pulse signal by coupling with the plurality of first openings of the sensing code wheel; the speed measuring module is connected with the first sensor and used for measuring the rotating speed of the impeller of the wind generating set based on the first pulse signal; the overspeed protection module is connected with the first sensor and used for counting pulse signals provided by the first sensor in unit time, obtaining a counting value and providing protection for the wind generating set based on comparison between the counting value and a preset threshold value.
In the vane measuring device, the sensing code wheel may have a second opening disposed on a second circumference, and the vane measuring device further includes: and the second sensor is arranged at a position corresponding to a second circumference on the stator side of the electric slip ring and is connected to the speed measuring module, a second pulse signal is provided through coupling with a second hole of the induction coded disc, and the speed measuring module calibrates the initial position of the impeller and determines the current position and the number of rotation turns of the impeller through the first pulse signal and the second pulse signal, wherein the first circumference and the second circumference have different radiuses.
In the impeller measuring device, the sensing code wheel may have a protrusion provided on a second circumference, and the impeller measuring device further includes: and the second sensor is arranged at a position corresponding to a second circumference on the stator side of the electric slip ring, is connected to the speed measuring module, provides a second pulse signal through coupling with the protrusions of the induction coded disc, and calibrates the initial position of the impeller and determines the current position and the number of rotation turns of the impeller through the first pulse signal and the second pulse signal, wherein the first circumference and the second circumference have different radiuses.
Drawings
FIG. 1 is an overall schematic view after mounting an induction code wheel on an electrical slip ring according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an inductive codewheel according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the relative positions of a sensor and a sensing code wheel according to an embodiment of the present invention;
FIG. 4 is a schematic view of an impeller measurement system of a wind turbine generator set according to an embodiment of the present invention.
The reference numbers illustrate: 10, a first sensor; 12, opening holes in A class; 122, teeth; 20, a second sensor; 22, type B open pore; 30, sensing a code disc; and 40, a sensor bracket.
Detailed Description
The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art upon review of the disclosure of this application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, upon understanding the disclosure of the present application, changes may be made in addition to the operations which must occur in a particular order. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness. In order that those skilled in the art will better understand the present invention, specific embodiments thereof will be described in detail below with reference to the accompanying drawings.
FIG. 1 is an overall schematic diagram of an electrical slip ring with an inductive code wheel mounted thereon according to an embodiment of the present invention, FIG. 2 is a schematic diagram of an inductive code wheel according to an embodiment of the present invention, and FIG. 3 is an enlarged schematic diagram of the relative positions of a sensor and an inductive code wheel according to an embodiment of the present invention.
As shown in fig. 1 to 3, an induction code wheel 30 is installed on the rotor side of the electrical slip ring, and the induction code wheel 30 may be a metal material. There are two types of code wheel openings in the inductive code wheel 30: the class A aperture 12 is a plurality of apertures (or slots) disposed on a first circumference for performing a measuring operation in conjunction with the first sensor 10, and the class A aperture 12 on the sensing code wheel 30 reduces the weight of the sensing code wheel 30.
The class B aperture 22 is one or more apertures (or slots) disposed on the second circumference for performing a measurement operation in conjunction with the second sensor 20. The type B aperture 22 may have a variety of implementations other than a hole directly on the second circumference, for example, teeth may be added on the second circumference of the induction code wheel 30 on the outside in the radial direction of its outer circumference (the portion other than teeth may be equivalent to an aperture), alternatively, an axial protrusion on the second circumference of the induction code wheel 30 (the portion other than protrusions may be equivalent to an aperture). The form of the opening is not limited to a round hole or a square hole.
As shown in fig. 3, the first sensor 10 is mounted on the stator side of the electrical slip ring at a position corresponding to the first circumference at which the class a aperture 12 is located, and is fixed to the sensor mount 40. According to an embodiment of the present invention, the first sensor 10 may have two, and the relative positional relationship between them may not be particularly limited, or may be spaced apart by a predetermined angle on the first circumference. The number of the first sensors 10 is not limited to two, and may be three or more, for example. As shown in fig. 2, the second sensor 20 is mounted at a position on the stator side of the electrical slip ring corresponding to the second circumference at which the class B aperture 22 is located. According to an embodiment of the present invention, the second sensor 20 may have two, and a relative positional relationship therebetween may not be particularly limited, or may be spaced apart on the second circumference by a predetermined angle, for example, by 180 ° in electrical angle. The number of the second sensors 20 is not limited to two, and may be three or more, for example. The first sensor 10 is located at a different radial position than the second sensor 20, i.e. the first sensor 10 is located at a different distance from the axis of rotation than the second sensor 20. For example, the radius of a first circle on which the first sensor 10 is located may be larger than the radius of a second circle on which the second sensor 20 is located.
The first sensor 10 and the second sensor 20 may be, but are not limited to, a proximity switch, a hall effect sensor, a photoelectric effect sensor, and the like.
According to the embodiment, since the second sensor 20 only needs to measure one tooth on the circumference, one protrusion may be added on the outside in the radial direction of the outer circumference of the sensing code wheel 30, and the other parts on the outer circumference have no metal material, i.e., the protrusion may be equivalent to the tooth and the parts other than the protrusion may be equivalent to the hole. At this time, the second sensor 20 is installed on the second circumference corresponding to the increased teeth. The second sensor 20 will generate one pulse signal corresponding to the increased lobe for every rotation of the rotor side.
Alternatively, the configuration of the teeth and apertures could also be modified to be axial protrusions on the second circumference of the inductive code wheel 30. At this time, the mounting position of the second sensor 20 corresponds to the second circumferential position of the protrusion and is arranged relatively far from the sensing code wheel 30 in the axial direction parallel to the rotation axis such that the distance between the second sensor 20 and the protrusion is within the sensing distance of the second sensor 20 and the distance between the second sensor 20 and the other portion of the sensing code wheel 30 exceeds the sensing distance of the second sensor 20, i.e., the protrusion may be equivalent to a tooth and the other portion of the sensing code wheel 30 may be equivalent to an aperture or a slot. The second sensor 20 will generate one pulse signal corresponding to the increased lobe for every rotation of the rotor side.
FIG. 4 is a schematic view of an impeller measurement system of a wind turbine generator set according to an embodiment of the present invention. As shown in fig. 4, the first sensor 10 may access a speed measurement module and an overspeed protection module of the wind turbine generator set and provide a first pulse signal, and the speed measurement module and the overspeed protection module are electrically connected to the main controller. The second sensor 20 may be electrically connected to a speed measurement module and an overspeed protection module of the master controller and provide a second pulse signal. The first sensor 10 and the second sensor 20 may provide a pulsed signal through coupling with the plurality of class A apertures 12 or class B apertures 22 (or teeth 122 between the apertures) of the sensing code wheel 30 for measuring impeller rotational speed.
According to an embodiment, a 60 number of teeth of sensing code wheel 30 may be used, with the dimensions of the teeth and grooves being selected to fill the circumference of sensing code wheel 30 at a predetermined ratio (e.g., 1: 1), with the width of the teeth and grooves being about 7.85mm when a 300mm diameter code wheel is used. The basic principle of the speed measurement module is to convert a pulse count value input by the first sensor 10 into a frequency signal, and finally output a voltage signal V after the conversion of a frequency signal/voltage signal (F/V) conversion circuit. The basic principle of the overspeed protection module is to count the pulse electrical signals input from the first sensor 10, when the circuit counter reaches a preset value within a certain time, the rotation speed of the impeller is indicated to exceed a set rotation speed, and the overspeed protection module provides protection for the wind generating set based on comparison between the count value and a preset threshold value.
When the first sensor 10 is connected to the speed measuring module, the voltage signal corresponding to the rotating speed is calculated according to the formula:
V＝(Ts×k×n/1000/60)×Vref (1)
wherein Ts is a fixed pulse width time constant of the conversion circuit; vref represents a fixed reference voltage value; t is 60 (seconds)/(k × n), t is the interval time of 10-tooth (or hole) pulses of the first sensor, and n is the impeller rotation speed; k is the number of teeth of the sensing code wheel 30. In the case where the number of teeth is determined, k, Ts, Vref are constants.
The relationship between the rotating speed voltage signal V and the rotating speed n of the impeller is in a direct proportion relationship. For example, when the rotation speed is 0-30rpm, the corresponding rotation speed voltage signal is 0-10V.
When the first sensor 10 is connected to the overspeed protection module, the protection value of the overspeed protection module can be set to 30rpm, the number of teeth is calculated as 60, 30 tooth number pulse signals per second can be used as a count protection value, and in order to increase the rapidity of protection response, the count protection value of 3 tooth number pulse signals occurring in every 100ms can be calculated in proportion, and the overspeed protection module reports a fault (an overspeed protection fault can be sent by the main controller).
In addition, the number of the first sensors 10 may be more than 1, for example, when more than 2 first sensors are installed, the overspeed protection module can implement mutual verification of the speed measurement of the two sensors. When one sensor fails to measure speed or has errors, the rotation speed value difference measured by any two sensors is compared with a set fault threshold value, and verification can be performed in time. The main controller reports the fault generally, and at present, the main controller reports the fault in two modes, namely, the main controller converts analog signals measured by two sensors connected with a speed measuring module into a rotating speed value, and then compares the rotating speed value with the rotating speed value to report the fault when a set rotating speed deviation is reached. The other is that the main controller reports the fault through level signals output by two sensors connected to the overspeed protection module; the overspeed protection module compares pulse voltage signal count values measured by the two sensors, and outputs a level signal for comparing faults when the difference value between the pulse voltage signal count values of the two sensors reaches a protection threshold value set by the overspeed protection module. For example, when the two rotation speed voltage signals measured by the two first sensors 10 are V1 and V2, respectively, it can be set that when a deviation of 3rpm (corresponding to a deviation of 1V in the voltage signals) occurs in the two rotation speed measurement values, the control system of the wind turbine generator system can determine that a rotation speed comparison fault occurs, that is, the first sensor 10 needs to be checked when the fault occurs.
A second sensor 20 for measuring the position of the impeller is mounted on a second circumference of the stator side of the electrical slip ring, the second sensor 20 is mounted at a specific angle theta between 0 and 360 degrees of the azimuth angle of the impeller, and when the opening (or tooth) on the sensing code wheel 30 of the impeller rotates past the second sensor 20 mounted at the angle theta, it indicates that the impeller has rotated one turn. Therefore, the position angle and the number of turns of the impeller can be determined, and the zero calibration measurement of the impeller is realized. For example, the second sensor 20 may be mounted at a fixed angle with the impeller orientation at an angle of 0 degrees. When the impeller rotates, the open hole (or the tooth) of the induction coded disc 30 passes through the second sensor 20 arranged at the angle position of 0 degree, the rotation of the impeller is indicated for one circle, the position angle of the impeller and the number of turns of the impeller can be determined based on the rotation, and the zero calibration measurement of the impeller is realized.
At this point, the counter of the first sensor 10 may be cleared and the count may be restarted from zero. When the counter is 1, it indicates that the current position of the impeller is 6 degrees from the zero position of the impeller, and so on, and when the counter is 60, it indicates that the impeller returns to the zero position, the counter of the first sensor 10 is cleared again by the second sensor 20. By using the combination of the first sensor 10 and the second sensor 20, the speed measuring module can measure the number of revolutions of the impeller and correct the positioning of the impeller in each revolution, and can read the position of the impeller in the process of rotating in real time. The number of the second sensors 20 may be more than 1, and when more than 2 second sensors 20 are installed, the overspeed protection module can realize mutual verification of two second sensors 20. Further, when the number of the second sensors 20 is two or more, calibration of a plurality of positions may be performed and the first sensor 10 may be cleared a plurality of times within each rotation circle.
According to an embodiment of the present invention, a measuring method of a rotary power generating apparatus may include: the pulse signal is provided by the coupling between the first sensor 10, which is connected to the speed measuring module of the rotary power generating device, and the sensing code wheel 30, so as to measure the rotating speed of the impeller. The pulse signals provided by the first sensor 10 are counted per unit time for providing protection of the rotating electrical power generating device based on a comparison of the counted value with a predetermined threshold value. A second sensor 20 is mounted on the stator side of the electrical slip ring at a position corresponding to a second circumference on which the class B aperture 22 is located. A pulse signal is provided by the coupling between the second sensor 20 and the aperture 22 of the inductive code wheel 30 for calibrating the initial position of the rotary power unit and determining the current position of the impeller and the number of revolutions. The number of first sensors 10 may be more than 1, and whether the first sensor 10 is malfunctioning is determined by comparing the difference between the measured values of two first sensors 10. The number of the second sensors 20 may be more than 1, and whether the second sensor 20 is out of order is determined by comparing the difference between the measured values of the two second sensors 20.
The embodiment of the invention provides a sensor for measuring the rotating speed arranged on the side of an electric slip ring stator of a wind generating set, and an induction coded disc arranged on the side of an electric slip ring rotor, and the induction coded disc is connected into a control system of the wind generating set. The sensor can be connected into the speed measuring module and the overspeed protection module, and the two modules are connected into the main controller through electric connection so as to measure and protect the rotating speed and the position of the impeller of the generator set. According to the rotating speed measuring technology of the sensor and the sensing code disc configuration, the problems of large rotating speed measuring error and poor reliability caused by large size of the sensing code disc and unreliable factors such as installation tolerance and the like are solved, and meanwhile, the impeller position calibration can be realized.
Although the measurement method and the measurement device for the wind turbine generator set have been described above by taking the wind turbine generator set as an example, the present invention is not limited thereto, and may be applied to other types of rotary power generation equipment (e.g., a hydro generator set, a thermal generator set, etc.).
Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (15)
1. A measuring device for a rotating electrical power generating apparatus comprising an electrical slip ring, characterized in that the measuring device comprises:
an induction code wheel (30) mounted on the rotor side of the electrical slip ring and having a plurality of first apertures (12) arranged on a first circumference;
a first sensor (10) mounted at a position corresponding to a first circumference of a stator side of the electrical slip ring and providing a first pulse signal for measuring a rotational speed of the rotary electric power generating apparatus by coupling with a plurality of first apertures (12) of the sensing code wheel (30).
2. The measuring device according to claim 1, wherein the first sensor (10) is connected to an overspeed protection module for counting the first pulse signals provided by the first sensor (10) per unit of time, obtaining a count value, providing protection of a rotating power generating equipment based on a comparison of the count value with a predetermined threshold value.
3. The measurement device of claim 1,
the sensing code wheel (30) has a second opening (22) arranged on a second circumference, and
the measuring device further includes: and a second sensor (20) which is arranged at a position corresponding to a second circumference on the stator side of the electric slip ring and provides a second pulse signal through the coupling with a second hole (22) of the induction code disc (30), and the initial position is calibrated and the current position and the number of rotations are determined through the first pulse signal and the second pulse signal, wherein the radius of the first circumference is different from that of the second circumference.
4. The measurement device of claim 1,
the sensing code wheel (30) has a protrusion arranged on a second circumference, and
the measuring device further includes: and a second sensor (20) which is arranged at a position corresponding to a second circumference on the stator side of the electric slip ring, is connected to the speed measuring module, provides a second pulse signal through the coupling with the bulge of the induction coded disc (30), calibrates an initial position through the first pulse signal and the second pulse signal, and determines a current position and the number of rotations, wherein the radius of the first circumference is different from that of the second circumference.
5. The measurement device of claim 1, wherein the measurement device comprises:
a plurality of said first sensors (10) respectively arranged at different positions corresponding to a first circumference on the stator side of the electrical slip ring;
and a plurality of first sensors (10) are connected to an overspeed protection module of the rotary electric machine, which overspeed protection module performs a verification of the first sensors (10) by comparing the difference between the measurement values of at least two of said first sensors (10).
6. The measurement device according to claim 3 or 4, wherein the measurement device comprises:
a plurality of second sensors (20) respectively arranged at different positions corresponding to the second circumference on the stator side of the electric slip ring for calibrating a plurality of initial positions;
and a plurality of second sensors (20) are connected to an overspeed protection module of the rotary power plant, which overspeed protection module performs a verification of the second sensors (20) by comparing the difference between the measured values of at least two of the second sensors (20).
7. A measuring method of a rotary electric power generating apparatus including an electric slip ring, characterized in that the measuring device is mounted with an induction code wheel (30) at a rotor side of the electric slip ring, the induction code wheel (30) having a plurality of first openings (12) provided on a first circumference, a first sensor (10) is mounted at a position corresponding to the first circumference at a stator side of the electric slip ring,
the method comprises the following steps: a first pulse signal is provided for measuring the rotational speed of the rotary electrical machine by coupling between the first sensor (10) and a first plurality of openings (12) of the induction code disk (30).
8. The measurement method of claim 7, wherein the method further comprises:
-counting the first pulse signals provided by the first sensor (10) during a unit of time, -obtaining a count value, -providing protection of the rotating electrical power generating device based on a comparison of the count value with a predetermined threshold value.
9. The measurement method according to claim 7,
the inductive encoder disc (30) has a second opening (22) arranged on a second circumference, and a second sensor (20) is arranged at a position corresponding to the second circumference on the stator side of the electrical slip ring, wherein the first circumference and the second circumference have different radii,
the method further comprises the following steps: a second pulse signal is provided by the coupling between the second sensor (20) and a second opening (22) of the inductive code disc (30), and the initial position is calibrated and the current position and the number of rotations are determined by the first pulse signal and the second pulse signal.
10. The measurement method according to claim 7,
the sensing code wheel (30) has a protrusion arranged on a second circumference, and
a second sensor (20) is arranged at a position on the stator side of the electrical slip ring corresponding to a second circumference, wherein the first circumference and the second circumference have different radii,
the method further comprises the following steps: a second pulse signal is provided by the coupling between the second sensor (20) and the protrusion of the inductive code disc (30), the initial position is calibrated and the current position and the number of rotations are determined by the first pulse signal and the second pulse signal.
11. Measuring method according to claim 7, wherein the first sensor comprises a plurality of the first sensors (10) arranged at different positions corresponding to a first circumference, respectively, on the stator side of the electrical slip ring,
and the method further comprises: the verification of the first sensor (10) is performed by comparing the difference between the measured values of at least two of said first sensors (10).
12. Measuring method according to claim 9 or 10, wherein the second sensor (20) comprises a plurality of second sensors (20) arranged at different positions corresponding to a second circumference, respectively, on the stator side of the electrical slip ring,
and the method further comprises: a plurality of initial positions are calibrated by a plurality of second sensors (20), and a check of the second sensors (20) is performed by comparing the difference between the measured values of at least two of said second sensors (20).
13. An impeller measuring system of a wind generating set, the impeller measuring system comprising an electrical slip ring, characterized in that the measuring device comprises:
an induction code wheel (30) mounted on the rotor side of the electrical slip ring and having a plurality of first apertures (12) arranged on a first circumference;
a first sensor (10) mounted at a position corresponding to a first circumference of a stator side of the electrical slip ring and providing a first pulse signal through coupling with a plurality of first apertures (12) of the induction code wheel (30);
the speed measuring module is connected with the first sensor (10) and is used for measuring the rotating speed of an impeller of the wind generating set based on the first pulse signal;
the overspeed protection module is connected with the first sensor (10) and is used for counting the first pulse signals provided by the first sensor (10) in unit time, obtaining a counting value and providing protection for the wind generating set based on comparison between the counting value and a preset threshold value.
14. The impeller measurement system of claim 13,
the sensing code wheel (30) has a second opening (22) arranged on a second circumference, and
the impeller measuring device further includes: and a second sensor (20) which is arranged at a position corresponding to a second circumference on the stator side of the electric slip ring and is connected to the speed measuring module, and provides a second pulse signal through the coupling with a second hole (22) of the induction coded disc (30), the speed measuring module calibrates the initial position of the impeller through the first pulse signal and the second pulse signal and determines the current position and the number of rotations of the impeller, wherein the first circumference and the second circumference have different radiuses.
15. The impeller measurement system of claim 13,
the sensing code wheel (30) has a protrusion arranged on a second circumference, and
the impeller measuring device further includes: and a second sensor (20) which is arranged at a position corresponding to a second circumference on the stator side of the electric slip ring and is connected to the speed measuring module, and provides a second pulse signal through the coupling with the protrusion of the induction coded disc (30), the speed measuring module calibrates the initial position of the impeller and determines the current position and the number of rotations of the impeller through the first pulse signal and the second pulse signal, wherein the first circumference and the second circumference have different radiuses.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679092A (en) * | 2020-06-05 | 2020-09-18 | 宜昌江峡船用机械有限责任公司 | Device and method for detecting rotating speed of flywheel of press machine |
| CN112763746A (en) * | 2021-01-14 | 2021-05-07 | 山西太钢不锈钢股份有限公司 | Method for realizing multifunctional speed measurement of rotating mechanism based on logic controller |
| CN113623135A (en) * | 2021-09-15 | 2021-11-09 | 中国船舶重工集团海装风电股份有限公司 | Overspeed-preventing shutdown control method for wind turbine generator |
| CN113655234A (en) * | 2021-08-11 | 2021-11-16 | 三一重能股份有限公司 | Speed measuring disc, rotating speed and positioning measuring system and method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2058358A (en) * | 1979-08-18 | 1981-04-08 | Bosch Gmbh Robert | Detecting the rotational speed and/or angular position of a shaft |
| CN1175926A (en) * | 1995-10-17 | 1998-03-11 | 精工爱普生株式会社 | Sensor device, driving force supplementing device and zero point adjusting device for torque sensor for driving force supplementing device |
| JP2004219383A (en) * | 2003-01-17 | 2004-08-05 | Central Japan Railway Co | Wheel speed detection system |
| CN101092889A (en) * | 2006-06-21 | 2007-12-26 | 株式会社日立制作所 | Phase angle detection apparatus and variable valve timing control apparatus using the phase angle detection apparatus for internal combustion engine |
| EP2062059A2 (en) * | 2006-09-14 | 2009-05-27 | MTU Aero Engines GmbH | Measuring arrangement for detecting a 1/ rotary momentum of an engine rotor, and associated method |
| CN103399165A (en) * | 2013-07-23 | 2013-11-20 | 国电南瑞科技股份有限公司 | Large wind turbine unit rotary detecting device |
| CN203405471U (en) * | 2013-07-23 | 2014-01-22 | 国电南瑞科技股份有限公司 | A rotation detecting apparatus of a large wind-driven generator set |
| CN105510026A (en) * | 2015-12-10 | 2016-04-20 | 内蒙古久和能源装备有限公司 | Wind turbine generator system shaft coupling skidding fault detection apparatus and method |
| CN208203481U (en) * | 2018-05-17 | 2018-12-07 | 三一重能有限公司 | Wind-driven generator and its transmission shaft speed measuring device |
| CN109025517A (en) * | 2018-08-24 | 2018-12-18 | 南京东屋电气有限公司 | A kind of lock core with cam relative position monitoring function |
| CN109625091A (en) * | 2018-12-14 | 2019-04-16 | 北京经纬恒润科技有限公司 | A kind of method and apparatus of determining steering wheel angle |
| CN109945819A (en) * | 2019-04-08 | 2019-06-28 | 中国科学院电工研究所 | A kind of permanent-magnet synchronous motor rotor position measurement method |
-
2019
- 2019-12-24 CN CN201911345949.4A patent/CN111024976A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2058358A (en) * | 1979-08-18 | 1981-04-08 | Bosch Gmbh Robert | Detecting the rotational speed and/or angular position of a shaft |
| CN1175926A (en) * | 1995-10-17 | 1998-03-11 | 精工爱普生株式会社 | Sensor device, driving force supplementing device and zero point adjusting device for torque sensor for driving force supplementing device |
| JP2004219383A (en) * | 2003-01-17 | 2004-08-05 | Central Japan Railway Co | Wheel speed detection system |
| CN101092889A (en) * | 2006-06-21 | 2007-12-26 | 株式会社日立制作所 | Phase angle detection apparatus and variable valve timing control apparatus using the phase angle detection apparatus for internal combustion engine |
| EP2062059A2 (en) * | 2006-09-14 | 2009-05-27 | MTU Aero Engines GmbH | Measuring arrangement for detecting a 1/ rotary momentum of an engine rotor, and associated method |
| CN103399165A (en) * | 2013-07-23 | 2013-11-20 | 国电南瑞科技股份有限公司 | Large wind turbine unit rotary detecting device |
| CN203405471U (en) * | 2013-07-23 | 2014-01-22 | 国电南瑞科技股份有限公司 | A rotation detecting apparatus of a large wind-driven generator set |
| CN105510026A (en) * | 2015-12-10 | 2016-04-20 | 内蒙古久和能源装备有限公司 | Wind turbine generator system shaft coupling skidding fault detection apparatus and method |
| CN208203481U (en) * | 2018-05-17 | 2018-12-07 | 三一重能有限公司 | Wind-driven generator and its transmission shaft speed measuring device |
| CN109025517A (en) * | 2018-08-24 | 2018-12-18 | 南京东屋电气有限公司 | A kind of lock core with cam relative position monitoring function |
| CN109625091A (en) * | 2018-12-14 | 2019-04-16 | 北京经纬恒润科技有限公司 | A kind of method and apparatus of determining steering wheel angle |
| CN109945819A (en) * | 2019-04-08 | 2019-06-28 | 中国科学院电工研究所 | A kind of permanent-magnet synchronous motor rotor position measurement method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679092A (en) * | 2020-06-05 | 2020-09-18 | 宜昌江峡船用机械有限责任公司 | Device and method for detecting rotating speed of flywheel of press machine |
| CN112763746A (en) * | 2021-01-14 | 2021-05-07 | 山西太钢不锈钢股份有限公司 | Method for realizing multifunctional speed measurement of rotating mechanism based on logic controller |
| CN113655234A (en) * | 2021-08-11 | 2021-11-16 | 三一重能股份有限公司 | Speed measuring disc, rotating speed and positioning measuring system and method thereof |
| CN113623135A (en) * | 2021-09-15 | 2021-11-09 | 中国船舶重工集团海装风电股份有限公司 | Overspeed-preventing shutdown control method for wind turbine generator |
| CN113623135B (en) * | 2021-09-15 | 2022-09-27 | 中国船舶重工集团海装风电股份有限公司 | Overspeed-preventing shutdown control method for wind turbine generator |
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