CN114884280A - Rotor coil temperature measuring device - Google Patents
Rotor coil temperature measuring device Download PDFInfo
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- CN114884280A CN114884280A CN202210458942.9A CN202210458942A CN114884280A CN 114884280 A CN114884280 A CN 114884280A CN 202210458942 A CN202210458942 A CN 202210458942A CN 114884280 A CN114884280 A CN 114884280A
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- rotor
- temperature
- demodulator
- temperature measuring
- rotor coil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/35—Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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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
Abstract
The invention discloses a rotor coil temperature measuring device, which belongs to the technical field of hydroelectric power generation, and comprises a computer and a temperature measuring optical fiber arranged on a rotor, and is characterized in that: still include the ethernet switch, the host computer server, optical terminal and optical transmitter and receiver, receiver and concentrator, fixed box and the demodulator and the isolation power of setting in fixed box, it is connected with demodulator and rotor lead wire respectively to keep apart the power, the temperature measurement optic fibre is connected with the demodulator, the receiver is connected with the concentrator, the concentrator is connected with the computer, the receiving terminal and the computer of optical terminal are connected, the sending end and the receiving terminal of optical transmitter and receiver are connected, the sending end and the ethernet switch of optical transmitter and receiver are connected, the ethernet switch is connected with the host computer server. The temperature measuring loop has the advantages of relatively simple structure and temperature measuring principle, short loop, optimized layout according to the characteristics of the high-speed generator motor, good anti-interference performance and safety, and capability of ensuring the temperature measuring reliability and temperature measuring precision.
Description
Technical Field
The invention relates to the technical field of hydroelectric generation, in particular to a rotor coil temperature measuring device.
Background
The rotor coil of the hydraulic generator is an important part of the generator for generating electromagnetic reaction, and is a large heating body in the running process of the unit, and the temperature rise of the large heating body directly influences the safe running of the unit. At present, the temperature of a rotor is basically estimated according to the magnitude of the current of the rotor, the integral average temperature rise of a rotor coil can only be indirectly reflected, and the local heating of the rotor coil cannot be directly reflected. The rotor coil of the hydraulic generator is a large inductance coil, if a rotor loop is in short circuit, the rotor current shows gradual attenuation and cannot react on the stator voltage and the current of the generator in short time, so that relay protection which reacts the change of the electrical quantity cannot react in short time, and only when the insulation of an electric arc burning coil is developed and a rotor grounding alarm signal appears, the field operation and maintenance personnel can carry out load transfer shutdown processing to cause the damage of the rotor coil to be increased, and particularly, a part of the rotor coil or a magnetic pole lead head which is burnt by the electric arc can be directly thrown out to cause the chamber sweeping before the shutdown to cause the damage of a stator coil. If the temperature rise of the rotor coil can be monitored in real time on line, the shutdown inspection can be directly carried out. Therefore, it is very important to monitor the rotor coil on line in real time.
Chinese patent publication No. CN203949744U, publication No. 2014, No. 11, No. 19, discloses a temperature measuring device for a rotor coil of a large-sized hydraulic generator, in which a Pt100 platinum thermistor as a temperature sensor is mounted at a position to be measured by the rotor coil, an output signal of the temperature sensor is connected to a signal input end of a data acquisition recorder fixed on a rotor of the generator through a cable, and data transmission is realized between the data acquisition recorder and a wireless data transmission module mounted on the rotor of the generator through an industrial bus.
The principle of the large-scale hydraulic generator rotor coil temperature measuring device disclosed in the patent document is that a platinum thermal resistor is used for measuring temperature, temperature signals are transmitted based on electric quantity, and signals are led out by a cable; the probe is large in structure and difficult to fix, and is completely not suitable for a high-rotation-speed unit; moreover, when the anti-interference electromagnetic wave sensor is applied to a strong electromagnetic field, the anti-interference capability is weak.
Chinese patent publication No. CN206945170U, published as 2018, 01, 30, discloses an optical fiber temperature measuring device for a three-phase ac excitation bar of a rotor of a variable speed generator-motor, which is characterized in that the device is composed of a wired communication system and a wireless communication system, wherein the two systems share an optical fiber thermometer, an optical fiber signal regulator, an internal communication cable, an internal power cable, an external communication cable, an external power cable and an optical fiber temperature measuring control cabinet, wherein one end of the optical fiber thermometer is embedded between an upper layer rotor bar and a lower layer rotor bar, and the other end of the optical fiber thermometer is connected to the optical fiber signal regulator; one end of the internal communication cable is connected with the optical fiber signal regulator, and the other end of the internal communication cable is divided into two paths which are respectively connected with a wired communication system and a wireless communication system; one end of the internal power cable is connected with the optical fiber signal regulator, and the other end of the internal power cable is divided into two paths which are respectively connected with the wired communication system and the wireless communication system; one end of an external communication cable is connected with the optical fiber temperature measurement control cabinet, and the other end of the external communication cable is divided into two paths which are respectively connected with a wired communication system and a wireless communication system; one end of the external power cable is connected with the optical fiber temperature measurement control cabinet, and the other end of the external power cable is divided into two paths which are respectively connected with the wired communication system and the wireless communication system.
The variable-speed generator motor rotor three-phase alternating-current excitation bar optical fiber temperature measuring device disclosed by the patent document is transmitted in two modes of a wired communication system and a wireless communication system, and the reliability and the accuracy of temperature signal output are improved. However, the fiber thermometer is embedded in an interlayer gasket strip between an upper layer coil bar and a lower layer coil bar of the rotor, the measured direct temperature of a copper wire is not obtained, and the fiber thermometer can only be used on a rotor alternating current excitation coil bar of a variable-speed generator motor. For a constant-speed generator motor, the structural form of a magnetic pole coil of the generator motor is completely different from that of a rotor alternating-current excitation bar on a variable-speed generator motor, and the generator motor does not have installation conditions; in addition, the optical fiber signal regulator is powered by a slip ring and a carbon brush, the structure of a power supply loop is quite complex, the power taking line is too long, and short circuit caused by insulation abrasion is easily caused in a high-speed unit.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the rotor coil temperature measuring device.
The invention is realized by the following technical scheme:
the utility model provides a rotor coil temperature measuring device, includes computer and the temperature measurement optic fibre of setting on the rotor, its characterized in that: the device also comprises an Ethernet switch, an upper computer server, an optical terminal for sending data, an optical transceiver for receiving data, a receiver and a concentrator fixed on the stator, a fixed box fixed on the rotor bracket, a demodulator and an isolation power supply arranged in the fixed box, wherein the rotor comprises a rotor coil and a rotor lead wire connected with the rotor coil, the isolation power supply is respectively connected with the demodulator and the rotor lead wire through power cables, a transmitter is arranged in the demodulator, the temperature measuring optical fiber is connected with the demodulator, the receiver is connected with the concentrator through a communication cable, the concentrator is connected with a computer, the receiving end of the optical terminal is connected with the computer through a communication cable, the sending end of the optical terminal is connected with the receiving end of the optical transmitter and receiver through an optical cable, the sending end of the optical transmitter and receiver is connected with the Ethernet switch through an optical cable, and the Ethernet switch is connected with the upper computer server through a communication cable.
The receiver is a plurality of, and a plurality of receivers are evenly arranged along the stator circumferencial direction.
The temperature measurement optical fiber comprises a temperature measurement probe and a temperature measurement lead connected to the temperature measurement probe, a chute is formed in a copper bar of the rotor coil, the temperature measurement probe is embedded into the chute, heat-resistant sealant is arranged in the chute, and the temperature measurement probe is sealed through the heat-resistant sealant.
And a cover used for packaging the demodulator and isolating the power supply is arranged on the fixed box.
The cover is provided with bolt holes, the bolt holes are connected with bolts, the cover is provided with a stop washer, and the cover is fixed on the fixing box through the bolts and the stop washer.
And the isolation power supply is used for outputting voltage and current to supply power to the demodulator with the transmitter.
And the demodulator is used for decoding the output signal of the temperature measuring optical fiber and transmitting the rotor coil temperature signal obtained by decoding to the receiver through the transmitter.
And the concentrator is used for collecting the temperature signal sent by the receiver and sending the temperature signal to the computer.
And the computer is used for recording the real-time temperature of each group of coils of the generator rotor at any time on line, comparing the real-time temperature with the preset normal temperature, and alarming after the real-time temperature exceeds the preset normal temperature.
The beneficial effects of the invention are mainly shown in the following aspects:
1. according to the invention, an isolation power supply is respectively connected with a demodulator and a rotor lead through power cables, a transmitter is arranged in the demodulator, a temperature measuring optical fiber is connected with the demodulator, a receiver is connected with a concentrator through a communication cable, the concentrator is connected with a computer, a receiving end of an optical terminal is connected with the computer through the communication cable, a sending end of the optical terminal is connected with a receiving end of an optical transceiver through an optical cable, the sending end of the optical transceiver is connected with an Ethernet switch through the optical cable, and the Ethernet switch is connected with an upper computer server through the communication cable.
2. According to the invention, the plurality of receivers are uniformly arranged along the circumferential direction of the stator, so that the temperature signals converted by the demodulator can be stably and reliably received.
3. According to the invention, the temperature measurement optical fiber comprises a temperature measurement probe and a temperature measurement lead wire connected to the temperature measurement probe, the copper bar of the rotor coil is provided with the chute, the temperature measurement probe is embedded into the chute, the chute is internally provided with heat-resistant sealant, the temperature measurement probe is sealed by the heat-resistant sealant, the temperature measurement lead wire can be prevented from being damaged due to overlarge bending angle, and the direct and stable measurement of the copper temperature of the rotor coil during the operation of the unit can be ensured.
4. According to the invention, the fixing box is provided with the cover for packaging the demodulator and the isolation power supply, so that the demodulator and the isolation power supply can be prevented from shaking when the unit operates, and the stability is ensured.
5. According to the invention, the cover is provided with the bolt hole, the bolt hole is connected with the bolt, the cover is provided with the stop washer, and the cover is fixed on the fixing box through the bolt and the stop washer, so that the demodulator can be firmly fixed and the power supply can be isolated, and the working stability and safety can be ensured.
6. The isolation power supply is used for outputting voltage and current to supply power to the demodulator with the transmitter, directly obtains electricity from the rotor lead wire to supply power to the demodulator, does not need to additionally increase a collecting ring disc and an electric brush, has overvoltage, overcurrent and overheat protection functions, can change input polarity according to needs, is simple and reliable in electricity obtaining mode, fully meets the actual operation needs of a unit, and is beneficial to simplifying the structure of the whole temperature measuring loop.
7. The demodulator is used for decoding the output signal of the temperature measuring optical fiber and transmitting the rotor coil temperature signal obtained by decoding to the receiver through the transmitter, and the demodulator is arranged in the whole temperature measuring loop, so that the decoded rotor coil temperature signal can be stably transmitted to the receiver.
8. The computer is used for recording the real-time temperature of each group of coils of the generator rotor at any time on line, comparing the real-time temperature with the preset normal temperature, and alarming after the real-time temperature exceeds the preset normal temperature, so that the running stability of the whole unit can be effectively ensured.
Drawings
The invention will be further described in detail with reference to the drawings and the detailed description, in which:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the present invention mounted on a partial rotor;
FIG. 3 is a schematic structural view of the fixing case of the present invention;
FIG. 4 is a schematic view of a rotor coil according to the present invention;
FIG. 5 is an enlarged view taken at A in FIG. 4;
the labels in the figure are: 1. the device comprises a computer, 2, a temperature measurement optical fiber, 3, a receiver, 4, a concentrator, 5, a fixing box, 6, a demodulator, 7, an isolation power supply, 8, a rotor coil, 9, a rotor lead, 10, a transmitter, 11, a temperature measurement probe, 12, a temperature measurement lead, 13, a chute, 14, a cover, 15, a bolt, 16, a stop washer, 17, an Ethernet switch, 18, an upper computer server, 19, an optical terminal, 20 and an optical terminal.
Detailed Description
Example 1
Referring to fig. 1-3, a rotor coil temperature measuring device comprises a computer 1 and a temperature measuring optical fiber 2 arranged on a rotor, and further comprises an ethernet switch 17, an upper computer server 18, an optical terminal 19 for transmitting data and an optical terminal 20 for receiving data, a receiver 3 and a hub 4 fixed on a stator, a fixing box 5 fixed on a rotor support, a demodulator 6 and an isolation power supply 7 arranged in the fixing box 5, wherein the rotor comprises a rotor coil 8 and a rotor lead 9 connected with the rotor coil 8, the isolation power supply 7 is respectively connected with the demodulator 6 and the rotor lead 9 through power cables, a transmitter 10 is arranged in the demodulator 6, the temperature measuring optical fiber 2 is connected with the demodulator 6, the receiver 3 is connected with the hub 4 through a communication cable, the hub 4 is connected with the computer 1, a receiving end of the optical terminal 19 is connected with the computer 1 through a communication cable, the transmitting end of the optical terminal 19 is connected to the receiving end of the optical transceiver 20 through an optical cable, the transmitting end of the optical transceiver 20 is connected to the ethernet switch 17 through an optical cable, and the ethernet switch 17 is connected to the upper computer server 18 through a communication cable.
In this embodiment, the isolation power supply 7 is connected to the demodulator 6 and the rotor lead 9 through power cables, respectively, the demodulator 6 is internally provided with a transmitter 10, the temperature measuring optical fiber 2 is connected to the demodulator 6, the receiver 3 is connected to the hub 4 through a communication cable, the hub 4 is connected to the computer 1, the receiving end of the optical terminal 19 is connected to the computer 1 through a communication cable, the transmitting end of the optical terminal 19 is connected to the receiving end of the optical transceiver 20 through an optical cable, the transmitting end of the optical transceiver 20 is connected to the ethernet switch 17 through an optical cable, the ethernet switch 17 is connected to the upper computer server 18 through a communication cable, compared with the prior art, the temperature measuring loop structure and temperature measuring principle are relatively simple, the loop is short, the layout is optimized according to the characteristics of a high-speed generator motor, and the isolation power supply has good anti-interference performance and safety, the temperature measurement reliability and the temperature measurement precision can be ensured.
Example 2
Referring to fig. 1-3, a rotor coil temperature measuring device comprises a computer 1 and a temperature measuring optical fiber 2 arranged on a rotor, and further comprises an ethernet switch 17, an upper computer server 18, an optical terminal 19 for transmitting data and an optical terminal 20 for receiving data, a receiver 3 and a hub 4 fixed on a stator, a fixing box 5 fixed on a rotor support, a demodulator 6 and an isolation power supply 7 arranged in the fixing box 5, wherein the rotor comprises a rotor coil 8 and a rotor lead 9 connected with the rotor coil 8, the isolation power supply 7 is respectively connected with the demodulator 6 and the rotor lead 9 through power cables, a transmitter 10 is arranged in the demodulator 6, the temperature measuring optical fiber 2 is connected with the demodulator 6, the receiver 3 is connected with the hub 4 through a communication cable, the hub 4 is connected with the computer 1, a receiving end of the optical terminal 19 is connected with the computer 1 through a communication cable, the transmitting end of the optical terminal 19 is connected to the receiving end of the optical transceiver 20 through an optical cable, the transmitting end of the optical transceiver 20 is connected to the ethernet switch 17 through an optical cable, and the ethernet switch 17 is connected to the upper computer server 18 through a communication cable.
The receivers 3 are multiple, and the multiple receivers 3 are uniformly arranged along the circumferential direction of the stator.
In this embodiment, there are a plurality of receivers 3, and the plurality of receivers 3 are uniformly arranged along the circumferential direction of the stator, so as to ensure stable and reliable reception of the temperature signal converted by the demodulator 6.
Example 3
Referring to fig. 1-5, a rotor coil temperature measuring device comprises a computer 1 and a temperature measuring optical fiber 2 arranged on a rotor, and further comprises an ethernet switch 17, an upper computer server 18, an optical terminal 19 for transmitting data and an optical terminal 20 for receiving data, a receiver 3 and a hub 4 fixed on a stator, a fixing box 5 fixed on a rotor support, a demodulator 6 and an isolation power supply 7 arranged in the fixing box 5, wherein the rotor comprises a rotor coil 8 and a rotor lead 9 connected with the rotor coil 8, the isolation power supply 7 is respectively connected with the demodulator 6 and the rotor lead 9 through power cables, a transmitter 10 is arranged in the demodulator 6, the temperature measuring optical fiber 2 is connected with the demodulator 6, the receiver 3 is connected with the hub 4 through a communication cable, the hub 4 is connected with the computer 1, a receiving end of the optical terminal 19 is connected with the computer 1 through a communication cable, the transmitting end of the optical terminal 19 is connected to the receiving end of the optical transceiver 20 through an optical cable, the transmitting end of the optical transceiver 20 is connected to the ethernet switch 17 through an optical cable, and the ethernet switch 17 is connected to the upper computer server 18 through a communication cable.
The receivers 3 are multiple, and the multiple receivers 3 are uniformly arranged along the circumferential direction of the stator.
The temperature measurement optical fiber 2 comprises a temperature measurement probe 11 and a temperature measurement lead 12 connected to the temperature measurement probe 11, a chute 13 is formed in a copper bar of the rotor coil 8, the temperature measurement probe 11 is embedded into the chute 13, heat-resistant sealant is arranged in the chute 13, and the temperature measurement probe 11 is sealed through the heat-resistant sealant.
In another preferred embodiment, the temperature measuring optical fiber 2 includes a temperature measuring probe 11 and a temperature measuring lead 12 connected to the temperature measuring probe 11, an inclined groove 13 is formed on the copper bar of the rotor coil 8, the temperature measuring probe 11 is embedded into the inclined groove 13, a heat-resistant sealant is disposed in the inclined groove 13, and the temperature measuring probe 11 is sealed by the heat-resistant sealant, so that the temperature measuring lead 12 can be prevented from being damaged due to an excessively large bending angle, and the direct and stable measurement of the copper temperature of the rotor coil 8 during the operation of the unit can be ensured.
Example 4
Referring to fig. 1-5, a rotor coil temperature measuring device comprises a computer 1 and a temperature measuring optical fiber 2 arranged on a rotor, and further comprises an ethernet switch 17, an upper computer server 18, an optical terminal 19 for transmitting data and an optical terminal 20 for receiving data, a receiver 3 and a hub 4 fixed on a stator, a fixing box 5 fixed on a rotor support, a demodulator 6 and an isolation power supply 7 arranged in the fixing box 5, wherein the rotor comprises a rotor coil 8 and a rotor lead 9 connected with the rotor coil 8, the isolation power supply 7 is respectively connected with the demodulator 6 and the rotor lead 9 through power cables, a transmitter 10 is arranged in the demodulator 6, the temperature measuring optical fiber 2 is connected with the demodulator 6, the receiver 3 is connected with the hub 4 through a communication cable, the hub 4 is connected with the computer 1, a receiving end of the optical terminal 19 is connected with the computer 1 through a communication cable, the transmitting end of the optical terminal 19 is connected to the receiving end of the optical transceiver 20 through an optical cable, the transmitting end of the optical transceiver 20 is connected to the ethernet switch 17 through an optical cable, and the ethernet switch 17 is connected to the upper computer server 18 through a communication cable.
The receivers 3 are multiple, and the multiple receivers 3 are uniformly arranged along the circumferential direction of the stator.
The temperature measurement optical fiber 2 comprises a temperature measurement probe 11 and a temperature measurement lead 12 connected to the temperature measurement probe 11, a chute 13 is formed in a copper bar of the rotor coil 8, the temperature measurement probe 11 is embedded into the chute 13, heat-resistant sealant is arranged in the chute 13, and the temperature measurement probe 11 is sealed through the heat-resistant sealant.
The stationary box 5 is provided with a cover 14 for enclosing the demodulator 6 and the isolated power supply 7.
The cover 14 is provided with bolt holes, the bolt holes are connected with bolts 15, the cover 14 is provided with a stop washer 16, and the cover 14 is fixed on the fixing box 5 through the bolts 15 and the stop washer 16.
In this embodiment, a cover 14 for enclosing the demodulator 6 and the isolated power supply 7 is disposed on the fixing case 5, so as to prevent the demodulator 6 and the isolated power supply 7 from shaking during the operation of the unit and ensure stability.
The cover 14 is provided with bolt holes, the bolt holes are connected with bolts 15, the cover 14 is provided with a stop washer 16, the cover 14 is fixed on the fixing box 5 through the bolts 15 and the stop washer 16, the demodulator 6 and the isolation power supply 7 can be firmly fixed, and the working stability and the safety are guaranteed.
Example 5
Referring to fig. 1-5, a rotor coil temperature measuring device comprises a computer 1 and a temperature measuring optical fiber 2 arranged on a rotor, and further comprises an ethernet switch 17, an upper computer server 18, an optical terminal 19 for transmitting data and an optical terminal 20 for receiving data, a receiver 3 and a hub 4 fixed on a stator, a fixing box 5 fixed on a rotor support, a demodulator 6 and an isolation power supply 7 arranged in the fixing box 5, wherein the rotor comprises a rotor coil 8 and a rotor lead 9 connected with the rotor coil 8, the isolation power supply 7 is respectively connected with the demodulator 6 and the rotor lead 9 through power cables, a transmitter 10 is arranged in the demodulator 6, the temperature measuring optical fiber 2 is connected with the demodulator 6, the receiver 3 is connected with the hub 4 through a communication cable, the hub 4 is connected with the computer 1, a receiving end of the optical terminal 19 is connected with the computer 1 through a communication cable, the transmitting end of the optical terminal 19 is connected to the receiving end of the optical transceiver 20 through an optical cable, the transmitting end of the optical transceiver 20 is connected to the ethernet switch 17 through an optical cable, and the ethernet switch 17 is connected to the upper computer server 18 through a communication cable.
The receivers 3 are multiple, and the multiple receivers 3 are uniformly arranged along the circumferential direction of the stator.
The temperature measurement optical fiber 2 comprises a temperature measurement probe 11 and a temperature measurement lead 12 connected to the temperature measurement probe 11, a chute 13 is formed in a copper bar of the rotor coil 8, the temperature measurement probe 11 is embedded into the chute 13, heat-resistant sealant is arranged in the chute 13, and the temperature measurement probe 11 is sealed through the heat-resistant sealant.
The stationary box 5 is provided with a cover 14 for enclosing the demodulator 6 and the isolated power supply 7.
The cover 14 is provided with bolt holes, the bolt holes are connected with bolts 15, the cover 14 is provided with a stop washer 16, and the cover 14 is fixed on the fixing box 5 through the bolts 15 and the stop washer 16.
The isolated power supply 7 is used for outputting voltage and current to supply power to the demodulator 6 with the communicator 10.
And the demodulator 6 is used for decoding the output signal of the temperature measuring optical fiber 2 and transmitting the temperature signal of the rotor coil 8 obtained by decoding to the receiver 3 through the transmitter 10.
The embodiment is a further preferred embodiment, the isolation power supply 7 is used for outputting voltage and current to supply power to the demodulator 6 with the transmitter 10, the isolation power supply 7 directly gets power from the rotor lead 9 to supply power to the demodulator 6 without additionally adding a slip ring disc and an electric brush, the isolation power supply 7 also has overvoltage, overcurrent and overheat protection functions, the isolation power supply 7 can also exchange input polarity according to needs, the power getting mode is simple and reliable, the actual operation needs of the unit are fully met, and the whole temperature measurement loop structure is favorably simplified.
The demodulator 6 is used for decoding the output signal of the temperature measuring optical fiber 2 and transmitting the decoded rotor coil 8 temperature signal to the receiver 3 through the transmitter 10, and the demodulator 6 is arranged in the whole temperature measuring loop, so that the decoded rotor coil 8 temperature signal can be stably transmitted to the receiver 3.
Example 6
Referring to fig. 1-5, a rotor coil temperature measuring device comprises a computer 1 and a temperature measuring optical fiber 2 arranged on a rotor, and further comprises an ethernet switch 17, an upper computer server 18, an optical terminal 19 for transmitting data and an optical terminal 20 for receiving data, a receiver 3 and a hub 4 fixed on a stator, a fixing box 5 fixed on a rotor support, a demodulator 6 and an isolation power supply 7 arranged in the fixing box 5, wherein the rotor comprises a rotor coil 8 and a rotor lead 9 connected with the rotor coil 8, the isolation power supply 7 is respectively connected with the demodulator 6 and the rotor lead 9 through power cables, a transmitter 10 is arranged in the demodulator 6, the temperature measuring optical fiber 2 is connected with the demodulator 6, the receiver 3 is connected with the hub 4 through a communication cable, the hub 4 is connected with the computer 1, a receiving end of the optical terminal 19 is connected with the computer 1 through a communication cable, the transmitting end of the optical terminal 19 is connected to the receiving end of the optical transceiver 20 through an optical cable, the transmitting end of the optical transceiver 20 is connected to the ethernet switch 17 through an optical cable, and the ethernet switch 17 is connected to the upper computer server 18 through a communication cable.
The receivers 3 are multiple, and the multiple receivers 3 are uniformly arranged along the circumferential direction of the stator.
The temperature measurement optical fiber 2 comprises a temperature measurement probe 11 and a temperature measurement lead 12 connected to the temperature measurement probe 11, a chute 13 is formed in a copper bar of the rotor coil 8, the temperature measurement probe 11 is embedded into the chute 13, heat-resistant sealant is arranged in the chute 13, and the temperature measurement probe 11 is sealed through the heat-resistant sealant.
A cover 14 for enclosing the demodulator 6 and the isolated power supply 7 is provided on the fixing box 5.
The cover 14 is provided with bolt holes, the bolt holes are connected with bolts 15, the cover 14 is provided with a stop washer 16, and the cover 14 is fixed on the fixing box 5 through the bolts 15 and the stop washer 16.
The isolation power supply 7 is used for outputting voltage and current to supply power to the demodulator 6 with the communicator 10.
And the demodulator 6 is used for decoding the output signal of the temperature measuring optical fiber 2 and transmitting the temperature signal of the rotor coil 8 obtained by decoding to the receiver 3 through the transmitter 10.
And the hub 4 is used for collecting the temperature signal sent by the receiver 3 and sending the temperature signal to the computer 1.
And the computer 1 is used for recording the real-time temperature of each group of coils of the generator rotor at any moment on line, comparing the real-time temperature with a preset normal temperature, and alarming after the real-time temperature exceeds the preset normal temperature.
The embodiment is an optimal implementation mode, and the computer 1 is used for recording the real-time temperature of each group of coils of the generator rotor at any time on line, comparing the real-time temperature with a preset normal temperature, and alarming after the real-time temperature exceeds the preset normal temperature, so that the operation stability of the whole unit can be effectively ensured.
The working principle of the invention is as follows:
when the unit operates, exciting current is conducted in a rotor lead 9, an isolation power supply 7 is connected with a rotor magnetic pole in parallel, the isolation power supply 7 outputs proper voltage and current to supply power to a demodulator 6 with a transmitter 10 according to the actual requirement of the demodulator 6, a temperature measuring optical fiber 2 transmits a measured temperature signal of a rotor coil 8 of the generator to the demodulator 6 through a signal which can be identified by the optical fiber, the temperature signal is converted into a temperature signal through the demodulator 6 and then transmitted to a receiver 3 on a stator through the transmitter 10 which is arranged in the demodulator 6, the receiver 3 transmits the temperature signal to a hub 4 through a communication cable, the hub 4 transmits the collected temperature signal to a computer 1 through the communication cable, and the computer 1 directly reads the temperature of the rotor coil 8, so that the online temperature real-time monitoring of the high-speed rotor coil 8 is realized.
When the distance between the computer 1 and the concentrator 4 is up to 1000 m or more, the concentrator 4 transmits the collected temperature signal to the data transmitting optical terminal 19 through the communication cable, the data transmitting optical terminal 19 transmits the collected temperature signal to the data receiving optical terminal 20 through the optical cable, the data receiving optical terminal 20 transmits the collected temperature signal to the ethernet switch 17 through the optical cable, the ethernet switch 17 transmits the collected temperature signal to the upper computer server 18 through the communication cable to store the data, and the upper computer server 18 accesses the computer 1 through the communication cable to read the temperature of the rotor coil 8 during operation. If the temperature of the rotor coil 8 is too high and exceeds the specified preset value, an alarm is given immediately.
Claims (9)
1. The utility model provides a rotor coil temperature measuring device, includes computer (1) and temperature measurement optic fibre (2) of setting on the rotor, its characterized in that: the temperature measurement device is characterized by further comprising an Ethernet switch (17), an upper computer server (18), an optical terminal (19) used for sending data, an optical transceiver (20) used for receiving data, a receiver (3) and a hub (4) fixed on the stator, a fixed box (5) fixed on the rotor support, a demodulator (6) and an isolation power supply (7) arranged in the fixed box (5), wherein the rotor comprises a rotor coil (8) and a rotor lead (9) connected with the rotor coil (8), the isolation power supply (7) is respectively connected with the demodulator (6) and the rotor lead (9) through power cables, a transmitter (10) is arranged in the demodulator (6), the temperature measurement optical fiber (2) is connected with the demodulator (6), the receiver (3) is connected with the hub (4) through a communication cable, and the hub (4) is connected with the computer (1), the receiving end of the optical terminal (19) is connected with the computer (1) through a communication cable, the sending end of the optical terminal (19) is connected with the receiving end of the optical transmitter and receiver (20) through an optical cable, the sending end of the optical transmitter and receiver (20) is connected with the Ethernet switch (17) through an optical cable, and the Ethernet switch (17) is connected with the upper computer server (18) through a communication cable.
2. The rotor coil temperature measuring device of claim 1, wherein: the number of the receivers (3) is multiple, and the receivers (3) are uniformly arranged along the circumferential direction of the stator.
3. The rotor coil temperature measuring device of claim 1, wherein: temperature measurement optic fibre (2) are opened on the copper bar of rotor coil (8) including temperature probe (11) and temperature measurement lead wire (12) of connection on temperature probe (11) has chute (13), and during temperature probe (11) embedding chute (13), be provided with heat-resisting sealed glue in chute (13), and temperature probe (11) are sealed through heat-resisting sealed glue.
4. The rotor coil temperature measuring device of claim 1, wherein: and a cover (14) for packaging the demodulator (6) and the isolated power supply (7) is arranged on the fixed box (5).
5. The rotor coil temperature measuring device according to claim 4, wherein: the cover (14) is provided with bolt holes, the bolt holes are connected with bolts (15), the cover (14) is provided with a stop washer (16), and the cover (14) is fixed on the fixing box (5) through the bolts (15) and the stop washer (16).
6. The rotor coil temperature measuring device of claim 1, wherein: and the isolated power supply (7) is used for outputting voltage and current to supply power to the demodulator (6) with the transmitter (10).
7. The rotor coil temperature measuring device of claim 1, wherein: and the demodulator (6) is used for decoding the output signal of the temperature measuring optical fiber (2) and transmitting the temperature signal of the rotor coil (8) obtained by decoding to the receiver (3) through the transmitter (10).
8. The rotor coil temperature measuring device according to claim 1, wherein: the concentrator (4) is used for collecting the temperature signals sent by the receiver (3) and sending the temperature signals to the computer (1).
9. The rotor coil temperature measuring device of claim 1, wherein: and the computer (1) is used for recording the real-time temperature of each group of coils of the generator rotor at any moment on line, comparing the real-time temperature with a preset normal temperature, and alarming after the real-time temperature exceeds the preset normal temperature.
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| CN202210458942.9A CN114884280B (en) | 2022-04-28 | 2022-04-28 | Rotor coil temperature measuring device |
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| CN202210458942.9A CN114884280B (en) | 2022-04-28 | 2022-04-28 | Rotor coil temperature measuring device |
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