CN210744871U - Hydro-turbo generator set stator winding internal cooling circulation system based on hydrogen cooling technology - Google Patents
Hydro-turbo generator set stator winding internal cooling circulation system based on hydrogen cooling technology Download PDFInfo
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- CN210744871U CN210744871U CN201921657994.9U CN201921657994U CN210744871U CN 210744871 U CN210744871 U CN 210744871U CN 201921657994 U CN201921657994 U CN 201921657994U CN 210744871 U CN210744871 U CN 210744871U
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Abstract
The utility model discloses a cooling circulation system in hydroelectric set stator winding based on hydrogen cooling technique, the system is including being used for gathering the cooling water and realizing accomplishing the water-turbine generator set water cooling open circulation system of heat exchange with the hydrogen in the cooling closed circulation system in hydroelectric set stator winding hydrogen, use hydrogen to carry out heat exchange's hydroelectric set stator winding hydrogen internal cooling closed circulation system and provide the hydrogen supplemental system in hydrogen source for hydroelectric set stator winding hydrogen internal cooling closed circulation system as coolant and hydroelectric set central line. The utility model provides a hydroelectric set stator winding internal cooling system based on hydrogen cooling technique uses hydrogen as coolant, because the coefficient of heat transfer of hydrogen is 5 times of air, heat transfer and insulating properties are all better, can effectively reduce generator ventilation loss and structure size, improve generator material effective utilization and generator operating efficiency.
Description
Technical Field
The utility model relates to a hydraulic and hydroelectric engineering technical field specifically indicates a hydroelectric set stator winding internal cooling circulation system based on hydrogen cooling technique.
Background
The cooling water supply object of the hydropower station is mainly a water turbine generator set, the cooling water supply device mainly has the function of cooling and lubricating the water turbine generator set, and the cooling water supply device mainly comprises a generator air cooler, a generator thrust bearing, a guide bearing, a water turbine main shaft seal and the like. The cooling modes commonly used by the prior hydroelectric generating set mainly comprise air cooling, water internal cooling, evaporative cooling and the like, and cooling media of the hydroelectric generating set are air and clean water respectively. The limit capacity of the hydraulic generator can be improved by adopting a water cooling technology, the temperature of a stator winding can be effectively reduced, but the operation and maintenance are complex, the problems of corrosion of coil strands, structural water leakage, water pollution of a pure water system and the like exist, and the operation safety and the service life of a unit are influenced; air cooling is applied to a water turbine generator set at present, installation, debugging and maintenance are simple and convenient, but the cooling effect and the material utilization rate are not as good as those of water cooling, axial temperature distribution of a stator bar is easily uneven, and further, the problems that stator lamination warping is induced, mechanical internal stress concentration is generated and the like are caused. Therefore, a novel cooling circulation system in the stator winding of the water turbine generator set needs to be designed.
Disclosure of Invention
The utility model aims at solving the weak point that above-mentioned background art exists, and provide a hydraulic generator set stator winding internal cooling circulation system based on hydrogen cooling technique, can effectively solve large-scale air-cooled hydroelectric set heat transfer effect relatively poor, material utilization is low, the easy scale deposit of unit heat exchanger, the uneven scheduling problem of line stick axial temperature distribution to can effectively guarantee hydroelectric set safety and stability and move, reduce the consumption of water resource by a wide margin, can wide application in hydraulic and hydroelectric engineering technical field.
In order to achieve the above object, the utility model discloses a cooling circulation system in hydroelectric set stator winding based on hydrogen cooling technique, its special character lies in, including hydroelectric set water cooling open circulation system, hydroelectric set stator winding hydrogen internal cooling closed circulation system and hydrogen make-up system: the water cooling open type circulating system of the water-turbine generator set comprises a control valve group, a water filter, a pressure reducing valve and a heat exchanger, and after the heat exchange with the hydrogen internal cooling closed type circulating system of the stator winding of the water-turbine generator set is completed through cooling water obtained from a water intake of the water-turbine generator set, the cooling water is discharged to a tail water pipe of the water-turbine generator set or tail water at the downstream of a hydropower station, and the hydrogen internal cooling closed type circulating system of the stator winding of the water-turbine generator set carries out heat exchange; the hydrogen supplementing system provides a hydrogen source for the hydrogen internal cooling closed circulation system of the stator winding of the water turbine generator set.
Further, the hydrogen internal cooling closed circulation system for the stator winding of the water turbine generator set comprises a hydrogen monitoring and pressure stabilizing device, a circulation pressurizing device, a heat exchanger, a hydrogen drying device and a cooler for the stator winding of the water turbine generator set.
Furthermore, the hydrogen monitoring and pressure stabilizing device comprises a hydrogen monitoring device, a signal feedback device, a PLC and an opening regulator which are connected in sequence along the signal direction; the hydrogen monitoring device monitors the purity and pressure transmission of hydrogen to PLC in the hydrogen cooling closed circulation system of the stator winding of the water-turbine generator set, the signal input end of the signal feedback device is connected with the signal output end of the PLC, and the signal output end of the signal feedback device is connected with the signal input end of the opening regulator.
Furthermore, the circulating pressurization device comprises a working fan pressurization system and a standby fan pressurization system, and the two pressurization systems are alternatively switched to be standby.
Furthermore, the hydrogen internal cooling closed circulation system of the stator winding of the hydroelectric generating set is provided with CO2Gas inlet and CO2And the exhaust port is used for exhausting and replacing the hydrogen in the pipeline.
Furthermore, the hydrogen supplementing system comprises a pressure reducing valve group, a pressure stabilizing gas storage tank and an intelligent gas supplementing device, wherein the pressure reducing valve group is communicated with the hydrogen station, and the pressure stabilizing gas storage tank is communicated with a hydrogen internal cooling closed circulation system of the stator winding of the water-turbine generator set.
Compared with the prior art, the utility model discloses the beneficial effect who has includes:
(1) the utility model provides a hydroelectric set stator winding internal cooling system based on hydrogen cooling technique uses hydrogen as coolant, because the coefficient of heat transfer of hydrogen is 5 times of air, heat transfer and insulating properties are all better, can effectively reduce generator ventilation loss and structure size, improve generator material effective utilization and generator operating efficiency.
(2) The utility model discloses can effectively solve that large-scale forced air cooling hydroelectric set heat transfer effect is relatively poor, the easy scale deposit of unit heat exchanger, stator bar axial temperature distribution is inhomogeneous, stator lamination warpage scheduling problem to and the interior cold hydroelectric set coil strand corrosion of water, the structure scheduling problem that leaks, improve unit operation safety and life, reduce the consumption of water resource by a wide margin, can wide application in hydraulic and hydroelectric engineering technical field.
Drawings
Fig. 1 is the utility model discloses cooling circulation system's in hydroelectric set stator winding structural schematic diagram based on hydrogen cooling technique.
In the figure: the water cooling open type circulating system of the hydroelectric generating set 1 comprises a pressure steel pipe 1.1, a water intake 1.2, a control valve group 1.3, a water filter 1.4, a pressure reducing valve 1.5, a heat exchanger 1.6, a tail water pipe of the hydroelectric generating set or the downstream of a hydropower station1.7 of tail water, 2 of a hydrogen internal cooling closed circulation system of a stator winding of the water turbine generator set, 2.1 of a hydrogen monitoring and pressure stabilizing device, 2.1.1 of a hydrogen monitoring device, 2.1.2 of a signal feedback device, 2.1.3 of an opening regulator, 2.2 of a circulating and pressurizing device, 2.3 of a hydrogen drying device, 2.4 of a stator winding cooler of the water turbine generator set, CO2Inlet 2.5, CO22.6 exhaust ports, 3 hydrogen gas supplementing systems, 3.1 pressure reducing valve groups, 3.2 pressure stabilizing gas storage tanks and 3.3 intelligent gas supplementing devices.
Detailed Description
In order to make the technical solution and the advantages of the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and the embodiments.
As shown in fig. 1, the utility model provides a cooling cycle system in hydroelectric set stator winding based on hydrogen cooling technique, including hydroelectric set water cooling open cycle system 1, hydroelectric set stator winding hydrogen internal cooling closed cycle system 2 and hydrogen supplemental system 3.
The water cooling open type circulating system 1 of the water turbine generator set is used for collecting cooling water to realize heat exchange with hydrogen in the hydrogen cooling closed type circulating system 2 of the stator winding of the water turbine generator set. The water cooling open type circulating system 1 of the water turbine generator set comprises a control valve group 1.3, a water filter 1.4, a pressure reducing valve 1.5 and a heat exchanger 1.6, wherein cooling water obtained from a water intake 1.2 arranged on a pressure steel pipe 1.1 of the water turbine generator set is sequentially connected with the operation valve group 1.3, the water filter 1.4, the pressure reducing valve 1.5, the heat exchanger 1.6 and a tail water pipe of the water turbine generator set or a tail water 1.7 at the downstream of a hydropower station through pipelines, and is discharged to the tail water pipe of the water turbine generator set or the tail water 1.7 at the downstream of the hydropower station after heat exchange is finished with a hydrogen cooling closed type circulating system 2.
The hydrogen internal cooling closed circulation system 2 of the stator winding of the water turbine generator set uses hydrogen as a cooling medium to exchange heat with the central line of the water turbine generator set. The hydrogen internal cooling closed circulation system 2 of the stator winding of the water turbine generator set is a closed circulation cooling loop consisting of a hydrogen monitoring and pressure stabilizing device 2.1, a circulation pressurizing device 2.2, a heat exchanger 1.6, a hydrogen drying device 2.3 and a water turbine generator set stator winding cooler 2.4. The hydrogen monitoring and pressure stabilizing device 2.1 comprises a hydrogen monitoring device 2.1.1, a signal feedback device 2.1.2, a PLC and an opening regulator 2.1.3 which are connected in sequence along the signal direction; the hydrogen monitoring device 2.1.1 monitors the purity and pressure transmission of hydrogen to PLC in the hydrogen cooling closed circulation system 2 of the stator winding of the hydroelectric generating set, the signal input end of the signal feedback device 2.1.2 is connected with the signal output end of the PLC, and the signal output end of the signal feedback device 2.1.2 is connected with the signal input end of the opening regulator 2.1.3. The hydrogen monitoring device 2.1.1 can monitor the pressure, temperature and purity of hydrogen in real time, when the purity of hydrogen is lower than 95%, the signal input end of the signal feedback device 2.1.2 is connected with the signal output end of the PLC, the signal output end of the signal feedback device 2.1.2 is connected with the signal input end of the opening regulator 2.1.3, and hydrogen supplement operation is carried out by adjusting the opening of the opening regulator 2.1.3 until the purity of hydrogen in the closed circulation system 2 in the stator winding hydrogen of the water turbine generator set is qualified.
The circulation pressurizing device 2.2 comprises a working fan pressurizing system and a standby fan pressurizing system, and the two pressurizing systems are selected and switched to be standby. The hydrogen internal cooling closed circulation system 2 of the stator winding of the hydroelectric generating set is also provided with CO2Gas inlet 2.5 and CO2And the exhaust port 2.6 is used for exhausting and replacing the hydrogen in the pipeline.
The hydrogen supplementing system 3 provides a hydrogen source for the hydrogen internal cooling closed circulation system 2 of the stator winding of the water turbine generator set. The hydrogen supplementing system 3 comprises a pressure reducing valve group 3.1, a pressure stabilizing gas storage tank 3.2 and an intelligent gas supplementing device 3.3, wherein the pressure reducing valve group 3.1 is communicated with the hydrogen station, and the pressure stabilizing gas storage tank 3.2 is communicated with the hydrogen internal cooling closed circulation system 2 of the stator winding of the water-turbine generator set. The intelligent gas supplementing device 3.3 monitors the pressure of hydrogen in the pressure stabilizing gas storage tank 3.2, and when the pressure of the hydrogen in the pressure stabilizing gas storage tank 3.2 is lower than a setting value, the intelligent gas supplementing device 3.3 connects the pressure stabilizing gas storage tank 3.2 with a hydrogen station in a power station plant by opening an electric valve to supplement gas; when the hydrogen pressure in the pressure stabilizing gas storage tank 3.2 reaches a setting value, the electric valve is closed through the intelligent gas supplementing device 3.3.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Those not described in detail in this specification are within the skill of the art.
Claims (6)
1. The utility model provides a hydroelectric set stator winding internal cooling circulation system based on hydrogen cooling technique which characterized in that: the water-cooled open circulation system (1) of the water-turbine generator set comprises a control valve group (1.3), a water filter (1.4), a pressure reducing valve (1.5) and a heat exchanger (1.6), and is discharged to a tail water pipe of the water-turbine generator set or tail water (1.7) at the downstream of a hydropower station after heat exchange with the hydrogen internal-cooled closed circulation system (2) of the stator winding of the water-turbine generator set is completed by cooling water obtained from a water intake (1.2) of the water-turbine generator set; the hydrogen internal cooling closed circulation system (2) of the stator winding of the water turbine generator set performs heat exchange with the center line of the water turbine generator set by taking hydrogen as a cooling medium; the hydrogen supplementing system (3) provides a hydrogen source for the hydrogen internal cooling closed circulation system (2) of the stator winding of the water turbine generator set.
2. The hydro-cooling technology-based cooling cycle system in stator windings of a water turbine generator set according to claim 1, characterized in that: the hydrogen internal cooling closed circulation system (2) of the stator winding of the water turbine generator set comprises a hydrogen monitoring and pressure stabilizing device (2.1), a circulating and pressurizing device (2.2), a heat exchanger (1.6), a hydrogen drying device (2.3) and a water turbine generator set stator winding cooler (2.4).
3. The hydro-cooling technology-based cooling cycle system in stator windings of a water turbine generator set according to claim 2, characterized in that: the hydrogen monitoring and pressure stabilizing device (2.1) comprises a hydrogen monitoring device (2.1.1), a signal feedback device (2.1.2), a PLC and an opening regulator (2.1.3) which are connected in sequence along the signal direction; the hydrogen monitoring device (2.1.1) monitors the purity and pressure transmission of hydrogen to PLC in the hydrogen cooling closed circulation system (2) of the stator winding of the water turbine generator set, the signal input end of the signal feedback device (2.1.2) is connected with the signal output end of the PLC, and the signal output end of the signal feedback device (2.1.2) is connected with the signal input end of the opening regulator (2.1.3).
4. The hydro-cooling technology-based cooling cycle system in stator windings of a water turbine generator set according to claim 2, characterized in that: the circulating pressurization device (2.2) comprises a working fan pressurization system and a standby fan pressurization system, and the two pressurization systems are selected to be switched to be standby.
5. The hydro-cooling technology-based cooling cycle system in stator windings of a water turbine generator set according to claim 1, characterized in that: the hydrogen internal cooling closed circulation system (2) of the stator winding of the hydroelectric generating set is provided with CO2Gas inlet (2.5) and CO2And the exhaust port (2.6) is used for exhausting and replacing the hydrogen in the pipeline.
6. The hydro-cooling technology-based cooling cycle system in stator windings of a water turbine generator set according to claim 1, characterized in that: the hydrogen supplementing system (3) comprises a pressure reducing valve bank (3.1), a pressure stabilizing gas storage tank (3.2) and an intelligent gas supplementing device (3.3), the pressure reducing valve bank (3.1) is communicated with the hydrogen station, and the pressure stabilizing gas storage tank (3.2) is communicated with the hydrogen internal cooling closed circulation system (2) of the stator winding of the water turbine generator set.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921657994.9U CN210744871U (en) | 2019-09-30 | 2019-09-30 | Hydro-turbo generator set stator winding internal cooling circulation system based on hydrogen cooling technology |
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| CN201921657994.9U CN210744871U (en) | 2019-09-30 | 2019-09-30 | Hydro-turbo generator set stator winding internal cooling circulation system based on hydrogen cooling technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601408A (en) * | 2019-09-30 | 2019-12-20 | 长江勘测规划设计研究有限责任公司 | Hydro-turbo generator set stator winding internal cooling circulation system based on hydrogen cooling technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601408A (en) * | 2019-09-30 | 2019-12-20 | 长江勘测规划设计研究有限责任公司 | Hydro-turbo generator set stator winding internal cooling circulation system based on hydrogen cooling technology |
| CN110601408B (en) * | 2019-09-30 | 2024-04-12 | 长江勘测规划设计研究有限责任公司 | Internal cooling circulation system for stator winding of hydroelectric generating set based on hydrogen cooling technology |
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