CN216081770U - Generator stator neutral point box temperature measurement system - Google Patents
Generator stator neutral point box temperature measurement system Download PDFInfo
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- CN216081770U CN216081770U CN202122355264.7U CN202122355264U CN216081770U CN 216081770 U CN216081770 U CN 216081770U CN 202122355264 U CN202122355264 U CN 202122355264U CN 216081770 U CN216081770 U CN 216081770U
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- thermal imager
- phase thermal
- generator
- temperature measurement
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Abstract
The utility model belongs to the field of generator maintenance, and particularly relates to a temperature measurement system for a generator stator neutral point box. The system comprises a control cabinet, a client host, a server, a switch, an I/O module, an A-phase thermal imager, a B-phase thermal imager and a C-phase thermal imager, wherein the A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager are respectively arranged on a three-phase cover plate of a generator neutral point box A, B, C, the A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager are respectively connected with the I/O module, the I/O module is connected with the switch, the switch is connected with the server, the server is connected with the client host, the server, the switch and the I/O module are arranged in the control cabinet, and the control cabinet is arranged below a generator neutral point. Has the advantages that: during the unit operation, avoid appearing the stator neutral point short circuit and arrange overheated impaired incident that leads to the generator, ensure the steady operation of unit.
Description
Technical Field
The utility model belongs to the field of generator maintenance, and particularly relates to a temperature measurement system for a generator stator neutral point box.
Background
As shown in fig. 1, the generator neutral point box contains a sleeve, a haversian fitting, a stator cooling water pipe, a short-circuit bar and the like. And the short circuit bar is connected with the Harvard fitting through a double-hole stop gasket by adopting a bolt.
During the operation of the power station, due to the vibration of the generator base, the tightness of the fixing bolt of the neutral point short circuit bar is gradually reduced, so that the contact resistance between the outgoing line sleeve and the neutral point short circuit bar is increased, the phenomenon of overheating is caused when a large current acts on the position for a long time, and the neutral point short circuit bar is possibly burnt out due to overheating. Other factors such as leakage, breakage and the like may occur in the stator water pipe, so that electrochemical corrosion occurs in the short-circuit row, the silver coating layer at the neutral point is damaged and falls off, and temperature abnormity is caused. Because the unit is limited by factors such as high voltage, strong magnetic field and the like during operation, the cover plate of the neutral point box cannot be opened, no observation window or peephole is arranged on site for measurement or observation, and the actual temperature value of each part in the neutral point box cannot be obtained.
The existing solutions include:
the fiber bragg grating quasi-distributed temperature measurement technology is applied to realize direct measurement of the running temperature of the stator winding conductor of the large-scale generator and abnormal heating of the main insulation caused by latent electrical faults. However, the FBG sensors used should be embedded in the wire bar conductor strands, which would have a severe impact on the operation of the generator if the sensors were to fall off during operation.
A dynamic temperature hydraulic model of a stator winding of a generator is established, a mathematical expression of the dynamic temperature hydraulic model of the stator winding is described, a wavelet multi-resolution analysis method and a wavelet energy spectrum analysis method are applied to analysis of voltage difference and circulation signals generated by parallel branches of a stator when a generator rotor is subjected to turn-to-turn short circuit, and only experimental results prove correctness and effectiveness of the method, so that field application is less.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a temperature measuring system for a generator stator neutral point box, which can overcome the influence of factors such as high voltage, strong magnetic field, eddy current induction and the like and monitor the temperature change in the generator stator neutral point box in real time.
The technical scheme of the utility model is as follows: the utility model provides a generator stator neutral point case temperature measurement system, includes the switch board, the client host computer, the server, the switch, the IO module, A looks thermal imager, B looks thermal imager and C looks thermal imager set up respectively on generator neutral point case A, B, C three-phase apron, A looks thermal imager, B looks thermal imager and C looks thermal imager all are connected with the IO module, the IO module is connected with the switch, the switch is connected with the server, the server is connected with the client host computer, the server, switch and IO module set up in the switch board, the switch board is installed in generator neutral point below.
The A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager are all connected with the I/O module through network cables.
The I/O module is connected with the switch through a network cable.
The A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager are respectively arranged on the supports, and the three supports are respectively arranged on a three-phase cover plate of a generator neutral point box A, B, C.
Through holes are respectively formed in three-phase cover plates of the generator neutral point box A, B, C.
The A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager adopt FOTRIC 626 type temperature measurement type online thermal imagers.
The utility model has the beneficial effects that: during the unit operation, the temperature variation of Harvard gold utensil and connecting plate in the key monitoring neutral point incasement, if the junction appears when the temperature is unusual, in time report to the police, avoid appearing the impaired incident of stator neutral point short circuit row overheat and lead to the generator, ensure the steady operation of unit.
Drawings
FIG. 1 is a schematic view of the interior of a generator neutral box;
fig. 2 is a schematic diagram of a temperature measurement system for a generator stator neutral point box provided by the utility model.
In the figure: the device comprises a sleeve pipe 1, a Harvard fitting 2, a pressing plate 3, a double-hole stop gasket 4, a short-circuit row 5, a stator cooling water pipe 5, a control cabinet 11, a client-side host 12, a server 13, a switch 14, an I/O module 15, a phase thermal imager 16A, a phase thermal imager 17B and a phase thermal imager 18C.
Detailed Description
The utility model is described in further detail below with reference to the figures and the embodiments.
The utility model provides a temperature measurement system for a generator stator neutral point box, which comprises two parts: temperature measuring sensor and local control cabinet. The temperature sensor monitors the temperature of the generator stator neutral point short-circuit bar in real time and transmits the monitored temperature signal to the local control cabinet.
As shown in fig. 2, a temperature measurement system for a generator stator neutral point box comprises a control cabinet 11, a client host 12, a server 13, a switch 14, an I/O module 15, an a-phase thermal imager 16, a B-phase thermal imager 17 and a C-phase thermal imager 18, wherein the a-phase thermal imager 16, the B-phase thermal imager 17 and the C-phase thermal imager 18 are respectively mounted on a bracket, the three brackets are respectively mounted on a three-phase cover plate of a generator neutral point box A, B, C, through holes are respectively formed in the three-phase cover plate of the generator neutral point box A, B, C, the a-phase thermal imager 16, the B-phase thermal imager 17 and the C-phase thermal imager 18 can measure the temperature in the generator neutral point box through the through holes, the a-phase thermal imager 16, the B-phase thermal imager 17 and the C-phase thermal imager 18 are connected with the I/O module 15 through a network cable, the I/O module 15 is connected with the switch 14 through a network cable, the switch 14 is connected with the server 13, the server 13 is connected with the client host 12, the server 13, the switch 14 and the I/O module 15 are arranged in the control cabinet 11, the control cabinet 11 is installed below a neutral point of the generator, then the real-time temperature can be displayed on the client host, and if the temperature is larger than a set value, an alarm device of the control cabinet triggers an alarm.
The client host computer is selected to be a desktop computer GTX1650-4G with a model of Dall; the server is selected from a Daire commercial Vostro i5-11400 model, 1T +256G model; the model of the I/O module is MOXA ioLotik E1211; the signal selected by the switch is TL-SG1008D full gigabit Ethernet switch.
The A-phase thermal imager 16, the B-phase thermal imager 17 and the C-phase thermal imager 18 adopt FOTRIC 626 type temperature measurement type online thermal imagers, the thermal imagers have the capability of resisting a strong magnetic field, the temperature measurement range is-20-650 ℃, the temperature measurement precision is +/-2 ℃ when the ambient temperature is-10-35 ℃, RS-485, the change of the surface temperature of a neutral point can be monitored in real time, and the temperature condition of the neutral point of the stator of the whole generator can be monitored visually, intuitively and effectively in real time, so that the safety of equipment and the stable operation of a unit are guaranteed.
According to the fact that the contact surface of the short-circuit bar and the Harvard fitting is 230 mm-115 mm in the figure 1, in order to achieve all-around detection of the temperature of the connection position, the temperature measuring sensor selects a thermal imager. The thermal imager can adjust the emissivity, reasonably set a measurement angle and a measurement distance, monitor the temperature of the whole equipment in real time, capture the highest temperature point and form a temperature change curve. And setting an alarm temperature value to protect the monitored high-temperature and high-pressure equipment.
According to the utility model, the thermal imager is fixed on the bracket at first, then the hole is formed on the cover plate of the neutral point box according to the size of the bracket and the size of a lens of the thermal imager, and finally the bracket is fixed on the cover plate of the neutral point box, so that the problem that the temperature measuring sensor is loosened due to vibration during the running of the generator is effectively avoided. In order to ensure the accuracy of the temperature measuring range to the maximum extent, during the shutdown and overhaul of the generator, the mode of infrared positioning is adopted in the neutral point box for surveying and mapping, the position of the opening of the lens of the thermal imager is accurately determined, and finally the position of the bolt hole is fixed by the positioning support according to the position of the opening of the lens and the size of the support.
The lens hole of the thermal imager is a 'through hole', the fixing bolt hole of the support is a threaded bolt hole, thermal imaging is fixed on the neutral point cover plate through the support, and the thermal imaging temperature measurement of the short-circuit bar in the neutral point box and the connecting position of the short-circuit bar and the Harvard fitting is realized through the 'through hole' of the lens of the thermal imager.
And the thermal imager arranged on the cover plate of the neutral point box of the generator is connected to a switch in the control cabinet through a network cable.
Claims (10)
1. The utility model provides a generator stator neutral point case temperature measurement system which characterized in that: the system comprises a control cabinet, a client host, a server, a switch, an I/O module, an A-phase thermal imager, a B-phase thermal imager and a C-phase thermal imager, wherein the A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager are respectively arranged on a three-phase cover plate of a generator neutral point box A, B, C, the A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager are respectively connected with the I/O module, the I/O module is connected with the switch, the switch is connected with the server, the server is connected with the client host, the server, the switch and the I/O module are arranged in the control cabinet, and the control cabinet is arranged below a generator neutral point.
2. The generator stator neutral box temperature measurement system of claim 1, wherein: the A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager are all connected with the I/O module through network cables.
3. The generator stator neutral box temperature measurement system of claim 1, wherein: the I/O module is connected with the switch through a network cable.
4. The generator stator neutral box temperature measurement system of claim 1, wherein: the A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager are respectively arranged on the supports, and the three supports are respectively arranged on a three-phase cover plate of a generator neutral point box A, B, C.
5. The generator stator neutral box temperature measurement system of claim 1, wherein: through holes are respectively formed in three-phase cover plates of the generator neutral point box A, B, C.
6. The generator stator neutral box temperature measurement system of claim 1, wherein: the A-phase thermal imager, the B-phase thermal imager and the C-phase thermal imager adopt FOTRIC 626 type temperature measurement type online thermal imagers.
7. The generator stator neutral box temperature measurement system of claim 1, wherein: the model of the client host is a Daire desktop GTX 1650-4G.
8. The generator stator neutral box temperature measurement system of claim 1, wherein: the model of the server is Daire commercial Vostro i5-11400, 1T + 256G.
9. The generator stator neutral box temperature measurement system of claim 1, wherein: the model of the I/O module is MOXA ioLodik E1211.
10. The generator stator neutral box temperature measurement system of claim 1, wherein: the signal selected by the switch is TL-SG1008D full gigabit Ethernet switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122355264.7U CN216081770U (en) | 2021-09-28 | 2021-09-28 | Generator stator neutral point box temperature measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122355264.7U CN216081770U (en) | 2021-09-28 | 2021-09-28 | Generator stator neutral point box temperature measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216081770U true CN216081770U (en) | 2022-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122355264.7U Active CN216081770U (en) | 2021-09-28 | 2021-09-28 | Generator stator neutral point box temperature measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216081770U (en) |
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2021
- 2021-09-28 CN CN202122355264.7U patent/CN216081770U/en active Active
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