CN114542356B - Water supply throttling system based on temperature control and control method - Google Patents
Water supply throttling system based on temperature control and control method Download PDFInfo
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- CN114542356B CN114542356B CN202210125895.6A CN202210125895A CN114542356B CN 114542356 B CN114542356 B CN 114542356B CN 202210125895 A CN202210125895 A CN 202210125895A CN 114542356 B CN114542356 B CN 114542356B
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/002—Injecting air or other fluid
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/004—Valve arrangements
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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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
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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
- Y02E10/20—Hydro energy
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Abstract
The invention provides a water supply throttling system based on temperature control and a control method, wherein an overflow system for overflow is connected to a water taking system; the output end of the water taking system is connected in parallel with a water guide bearing cooling system for cooling the water guide bearing, a thrust bearing lower guide bearing cooling system for cooling the thrust bearing lower guide bearing, a generator air cooling system for cooling the generator and a thrust bearing upper guide bearing cooling system for cooling the thrust bearing upper guide bearing; the water guide bearing cooling system, the thrust bearing lower guide bearing cooling system, the generator air cooling system and the thrust bearing upper guide bearing cooling system are all connected with the signal collector; the signal collector is connected with the valve opening controller. The system can monitor the temperature change of the cooler in real time, and make a corresponding coping method, and can accurately ensure the temperature of the cooler to realize the stable operation of the unit.
Description
Technical Field
The invention relates to the technical field of power station water supply, in particular to a water supply throttling system based on temperature control and a control method.
Background
The technical water supply system used at present in a certain power station mainly comprises an upper guide cooler, a generator air cooler, a derivation cooler and a water guide cooler, wherein the flow adjusting method mainly comprises the steps of manually adjusting the opening of a ball valve in the water supply process, the valve state is kept unchanged all the time after the valve is manually adjusted, when the temperature of the cooler changes, the flow entering the cooler cannot be changed, meanwhile, in order to ensure that the cooler has enough cooling water for cooling, the opening of the valve is often increased, and redundant cooling water is wasted.
Disclosure of Invention
The invention aims to provide a water supply throttling system and a control method based on temperature control, which are characterized in that a set algorithm program is adopted to control the opening of a valve, and an artificial intelligent method is used for replacing a method for manually adjusting the valve, so that the consumption of cooling water of a water supply system is saved; the system can monitor the temperature change of the cooler in real time, and make a corresponding coping method, and can accurately ensure the temperature of the cooler to realize the stable operation of the unit; the method not only saves energy, but also increases efficiency; and provides guarantee for the stable operation of the unit.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: a water supply throttling system based on temperature control comprises a water taking system for introducing cooling water; the water taking system is connected with an overflow system for overflow; the output end of the water taking system is connected in parallel with a water guide bearing cooling system for cooling the water guide bearing, a thrust bearing lower guide bearing cooling system for cooling the thrust bearing lower guide bearing, a generator air cooling system for cooling the generator and a thrust bearing upper guide bearing cooling system for cooling the thrust bearing upper guide bearing; the water guide bearing cooling system, the thrust bearing lower guide bearing cooling system, the generator air cooling system and the thrust bearing upper guide bearing cooling system are all connected with the signal collector; the signal collector is used for collecting temperature, pipeline pressure, flow and valve opening data of the corresponding system; the signal collector is connected with the valve opening controller, and the valve opening controller is connected with the corresponding water guide bearing cooling system, the thrust bearing lower guide bearing cooling system, the generator air cooling system and the thrust bearing upper guide bearing cooling system through feedback control; and water outlets of the water guide bearing cooling system, the thrust bearing lower guide bearing cooling system, the generator air cooling system and the thrust bearing upper guide bearing cooling system are connected with a cooling water discharge system.
The water taking system comprises a water taking trash rack which is connected with a water taking port of a volute, a first normally open valve is arranged on a pipeline where the water taking trash rack is located, a first electric ball valve is arranged behind the first normally open valve, and a second normally open valve, a third normally open valve and a water filter are sequentially arranged behind the first electric ball valve; the water filter is connected with an overflow system; the other end of the water filter is sequentially connected with a fourth normally open valve, a plurality of first butterfly valves, a pressure reducing valve, a fifth normally open valve, a second butterfly valve and a sixth normally open valve; and the sixth normally open valve is connected with a water guide bearing cooling system, a thrust bearing lower guide bearing cooling system, a generator air cooling system and a thrust bearing upper guide bearing cooling system in parallel.
The overflow system comprises two sets of seventh normally open valves and second electric ball valves which are connected in series on the water filter; the other ends of the two second electric ball valves are connected with an eighth normally open valve, and the eighth normally open valve is communicated with a downstream draft tube through an overflow pipe.
A safety valve is arranged between the fifth normally open valve and the second butterfly valve; the overflow port of the safety valve is communicated with the leakage water collecting well and is used for adjusting and controlling the pressure of the whole system.
The water guide bearing cooling system comprises a ninth normally open valve which is communicated with a water outlet pipe of the water taking system; the ninth normally open valve is sequentially connected with a first pressure sensor, a first pressure gauge, a water guide bearing cooler, a first pressure transmitter, a first flowmeter and a third electric ball valve; the water guide bearing cooler is provided with a first temperature sensor which is connected with the signal collector; the first pressure transmitter, the first flowmeter and the third electric ball valve are connected with the signal collector; the third electric ball valve is connected with the valve opening controller and controls the opening of the third electric ball valve.
The thrust bearing down-guide bearing cooling system comprises a tenth normally open valve which is communicated with a water outlet pipe of the water taking system; the tenth normally open valve is sequentially connected with a second pressure sensor, a second pressure gauge, a thrust bearing down-guide bearing cooler, a second pressure transmitter, a second flowmeter and a fourth electric ball valve; the thrust bearing down-guide bearing cooler is provided with a second temperature sensor which is connected with the signal collector; the second pressure transmitter, the second flowmeter and the fourth electric ball valve are connected with the signal collector; the fourth electric ball valve is connected with the valve opening controller and controls the opening of the fourth electric ball valve.
The generator air cooling system comprises an eleventh normally open valve which is communicated with a water outlet pipe of the water taking system; the eleventh normally open valve is sequentially connected with a third pressure sensor, a third pressure gauge, a generator cooler, a third pressure transmitter, a third flowmeter and a fifth electric ball valve; a third temperature sensor is arranged on the generator cooler and is connected with the signal collector; the third pressure transmitter, the third flowmeter and the fifth electric ball valve are connected with the signal collector; the fifth electric ball valve is connected with the valve opening controller and controls the opening of the valve opening controller.
The thrust bearing upper guide bearing cooling system comprises a twelfth normally open valve which is communicated with a water outlet pipe of the water taking system; a fourth pressure sensor, a fourth pressure gauge, a thrust bearing upper guide bearing cooler, a fourth pressure transmitter, a fourth flowmeter and a sixth electric ball valve are sequentially connected behind the twelfth normally open valve; a fourth temperature sensor is arranged on the thrust bearing upper guide bearing cooler and is connected with the signal collector; the fourth pressure transmitter, the fourth flowmeter and the sixth electric ball valve are connected with the signal collector; the sixth electric ball valve is connected with the valve opening controller and controls the opening of the valve opening controller.
The cooling water discharge system comprises a main drain pipe, and a fifth flowmeter, a seventh electric ball valve and a cooling water drain pipe are sequentially connected to the rear of the main drain pipe; the fifth flowmeter and the seventh electric ball valve are connected with the signal collector; the seventh electric ball valve is connected with the valve opening controller and controls the opening of the seventh electric ball valve.
The control method of the water supply throttling system based on temperature control comprises the following steps:
step one: in the running process of the system, cooling water in the volute is introduced into a corresponding water guide bearing cooling system, a thrust bearing lower guide bearing cooling system, a generator air cooling system and a thrust bearing upper guide bearing cooling system after being filtered and decompressed by a water taking system;
step two: in the running process of the water guide bearing cooling system, the temperature of the water guide bearing cooler is collected in real time through a first temperature sensor, and a temperature signal is transmitted to a signal collector; the method comprises the steps of collecting pipeline pressure in real time through a first pressure transmitter, and transmitting a pressure signal to a signal collector; collecting pipeline flow in real time through a first flowmeter, and transmitting a flow signal to a signal collector; transmitting the valve opening signal to a signal collector in real time through a third electric ball valve; the signal collector transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller; the opening of the third electric ball valve is controlled in a feedback way through a valve opening controller, so that the flow of cooling water in the water guide bearing cooler is controlled, the water guide bearing cooler is guaranteed to realize the minimum water consumption in the normal cooling process, and the purpose of throttling control is achieved;
step three: in the running process of the thrust bearing down-guide bearing cooling system, the temperature of a thrust bearing down-guide bearing cooler is acquired in real time through a second temperature sensor, and a temperature signal is transmitted to a signal acquisition device; the pressure of the pipeline is acquired in real time through a second pressure transmitter, and a pressure signal is transmitted to a signal acquisition device; collecting pipeline flow in real time through a second flowmeter, and transmitting a flow signal to a signal collector; transmitting the valve opening signal to a signal collector in real time through a fourth electric ball valve; the signal collector transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller; the opening of the fourth electric ball valve is controlled in a feedback way through a valve opening controller, so that the flow of cooling water in the thrust bearing lower guide bearing cooler is controlled, the minimum water consumption is realized in the normal cooling process of the thrust bearing lower guide bearing cooler, and the purpose of throttling control is achieved;
step four: in the running process of the generator air cooling system, the temperature of a generator cooler is acquired in real time through a third temperature sensor, and a temperature signal is transmitted to a signal acquisition device; the pressure of the pipeline is acquired in real time through a third pressure transmitter, and a pressure signal is transmitted to a signal acquisition device; collecting pipeline flow in real time through a third flowmeter, and transmitting a flow signal to a signal collector; transmitting valve opening signals to a signal collector in real time through a fifth electric ball valve; the signal collector transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller; the opening of the fifth electric ball valve is controlled through the feedback of the valve opening controller, so that the flow of cooling water in the generator cooler is controlled, the minimum water consumption of the generator cooler is ensured in the normal cooling process, and the purpose of throttling control is achieved;
step five: in the running process of the thrust bearing upper guide bearing cooling system, the temperature of the thrust bearing upper guide bearing cooler is acquired in real time through a fourth temperature sensor, and a temperature signal is transmitted to a signal acquisition device; the pressure of the pipeline is acquired in real time through a fourth pressure transmitter, and a pressure signal is transmitted to a signal acquisition device; collecting pipeline flow in real time through a fourth flowmeter, and transmitting a flow signal to a signal collector; transmitting valve opening signals to a signal collector in real time through a sixth electric ball valve; the signal collector transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller; the opening of the sixth electric ball valve is controlled through the feedback of the valve opening controller, so that the flow of cooling water in the thrust bearing upper guide bearing cooler is controlled, the minimum water consumption is realized in the normal cooling process of the thrust bearing upper guide bearing cooler, and the purpose of throttling control is achieved;
step six: before working, the position of the valve is given by a large amount of operation data, and a certain opening degree of the valve is set as a zero position, so that the condition that water is not cut off for a short time even if the valve fails in the system operation process, and the temperature of the cooler is increased is ensured; the valve opening of the electric ball valve of each cooler is controlled through program operation, so that the reasonable flow distribution of each cooler is ensured; under the condition of reserving certain redundancy, the seventh electric ball valve of the system outlet main valve is closed to the maximum extent to achieve the purpose of throttling.
The invention has the following beneficial effects:
1. the invention replaces the manual valve adjusting method by adopting the automatic program control method, thereby saving the cooling water consumption of the technical water supply system, the system can monitor the temperature change of the cooler in real time, and make corresponding countermeasures, and can accurately ensure the temperature of the cooler to realize the stable operation of the unit.
2. The water taking system can be used for providing the cooling water supply problem in the whole system operation process, so that the system can provide a sufficient cooling water source.
3. The overflow system can be used for discharging redundant flow in the water taking process, so that the safety and stability of the system are guaranteed. And the parallel connection mode can serve the purpose of standby.
4. The pipeline damage problem caused by the overhigh pressure of the system is effectively prevented through the safety valve, and the safety and the reliability of the operation of the system are ensured.
5. Through foretell water guide bearing cooling system can be with carrying out effectual cooling to water guide bearing, and then guaranteed the safe operation of water guide bearing.
6. The cooling system for the thrust bearing down guide bearing can be used for cooling the thrust bearing down guide bearing, so that the safe operation of the thrust bearing down guide bearing is ensured.
7. The generator air cooling system can be used for cooling the generator, so that the safe operation of the generator is ensured.
8. The cooling system of the upper guide bearing of the thrust bearing can be used for cooling the upper guide bearing of the thrust bearing, so that the safe operation of the generator is ensured.
9. The cooling water discharge system can be used for achieving the purpose of controlling the flow of the total cooling water of the system.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic diagram of the system of the present invention.
FIG. 2 is a schematic diagram of the water intake system of the present invention.
FIG. 3 is a diagram of a water guide bearing cooling system, a thrust bearing down guide bearing cooling system, a generator air cooling system, and a thrust bearing up guide bearing cooling system of the present invention.
In the figure: the system comprises a signal collector 1, a valve opening controller 2, a water taking system 3, an overflow system 4, a water guide bearing cooling system 5, a thrust bearing lower guide bearing cooling system 6, a generator air cooling system 7, a thrust bearing upper guide bearing cooling system 8 and a cooling water discharging system 9;
a water intake trash rack 301, a first normally open valve 302, a second normally open valve 304, a third normally open valve 305, a water filter 306, a fourth normally open valve 307, a plurality of first butterfly valves 308, pressure reducing valves 309, a fifth normally open valve 310, a second butterfly valve 312, and a sixth normally open valve 313;
the seventh normally open valve 401, the second electric ball valve 402, and the eighth normally open valve 403 pass through an overflow pipe 404;
a ninth normally open valve 501, a first pressure sensor 502, a first pressure gauge 503, a water guide bearing cooler 505, a first pressure transmitter 506, a first flowmeter 507, a third electrically powered ball valve 508;
a tenth normally open valve 601, a second pressure sensor 602, a second pressure gauge 603, a thrust bearing down-guide bearing cooler 605, a second pressure transmitter 606, a second flowmeter 607, a fourth electrically powered ball valve 608;
an eleventh normally open valve 701, a third pressure sensor 702, a third pressure gauge 703, a generator cooler 705, a third pressure transmitter 706, a third flowmeter 707, a fifth electrically powered ball valve 708;
a twelfth normally open valve 801, a fourth pressure sensor 802, a fourth pressure gauge 803, a thrust bearing upper guide bearing cooler 805, a fourth pressure transmitter 806, a fourth flow meter 807, and a sixth electrically powered ball valve 808.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-3, a water supply throttling system based on temperature control comprises a water intake system 3 for introducing cooling water; the water taking system 3 is connected with an overflow system 4 for overflow; the output end of the water taking system 3 is connected in parallel with a water guide bearing cooling system 5 for cooling the water guide bearing, a thrust bearing lower guide bearing cooling system 6 for cooling the thrust bearing lower guide bearing, a generator air cooling system 7 for cooling the generator and a thrust bearing upper guide bearing cooling system 8 for cooling the thrust bearing upper guide bearing; the water guide bearing cooling system 5, the thrust bearing lower guide bearing cooling system 6, the generator air cooling system 7 and the thrust bearing upper guide bearing cooling system 8 are all connected with the signal collector 1; the signal collector 1 is used for collecting temperature, pipeline pressure, flow and valve opening data of corresponding systems; the signal collector 1 is connected with the valve opening controller 2, and the valve opening controller 2 is connected with the corresponding water guide bearing cooling system 5, thrust bearing lower guide bearing cooling system 6, generator air cooling system 7 and thrust bearing upper guide bearing cooling system 8 through feedback control; and water outlets of the water guide bearing cooling system 5, the thrust bearing lower guide bearing cooling system 6, the generator air cooling system 7 and the thrust bearing upper guide bearing cooling system 8 are connected with a cooling water discharge system 9. Through adopting foretell throttle system, it combines the flowmeter based on the inside temperature sensor's of cooler data, adjusts the valve opening of cooler through the procedure that sets for and realizes cooling water flow's control, and then under the unchangeable circumstances of assurance cooler temperature, reduces the valve opening and reaches the purpose of throttle, has effectively avoided traditional manual control valve opening and the extravagant problem of cooling water that causes.
Further, the water intake system 3 comprises a water intake trash rack 301 connected with a water intake of a volute, a first normally open valve 302 is installed on a pipeline where the water intake trash rack 301 is located, a first electric ball valve 303 is installed behind the first normally open valve 302, and a second normally open valve 304, a third normally open valve 305 and a water filter 306 are installed behind the first electric ball valve 303 in sequence; the overflow system 4 is connected to the water filter 306; the other end of the water filter 306 is sequentially connected with a fourth normally open valve 307, a plurality of first butterfly valves 308, a pressure reducing valve 309, a fifth normally open valve 310, a second butterfly valve 312 and a sixth normally open valve 313; the sixth normally open valve 313 is followed by a parallel water guide bearing cooling system 5, a thrust bearing down guide bearing cooling system 6, a generator air cooling system 7, and a thrust bearing up guide bearing cooling system 8. The water taking system 3 can be used for providing the cooling water supply problem in the whole system operation process, so that the system can provide enough cooling water sources. Its water intaking is directly through spiral case intake water, and the water intaking in-process filters through water intaking trash rack 301, filters once more through water purifier 306 after the filtration, and then guarantees the cleanliness factor of water, can realize the decompression of system through relief pressure valve 309, and then guaranteed the safe operation of system, can be used for controlling the water supply process of water intaking system through corresponding a plurality of butterfly valves and normally open valve.
Further, the overflow system 4 comprises two sets of a seventh normally open valve 401 and a second electrically operated ball valve 402 connected in series with the water filter 306; the other ends of the two second electric ball valves 402 are connected with an eighth normally-open valve 403, and the eighth normally-open valve 403 is communicated with a downstream draft tube through an overflow pipe 404. The overflow system 4 can be used for discharging redundant flow in the water taking process, so that the safety and stability of the system are ensured. And the parallel connection mode can serve the purpose of standby. An automatic drain control can be implemented by the second electrically operated ball valve 402.
Further, a safety valve 311 is installed between the fifth normally-open valve 310 and the second butterfly valve 312; the overflow port of the relief valve 311 is in communication with the leak water collection well and is used to regulate the pressure of the overall system. The safety valve 311 effectively prevents the pipeline damage caused by the too high pressure of the system, and ensures the safety and reliability of the system operation. During operation of the system, the operating pressure of the system is set by the relief valve 311.
Further, the water guide bearing cooling system 5 comprises a ninth normally open valve 501, and the ninth normally open valve 501 is communicated with a water outlet pipe of the water taking system 3; a first pressure sensor 502, a first pressure gauge 503, a water guide bearing cooler 505, a first pressure transmitter 506, a first flowmeter 507 and a third electric ball valve 508 are sequentially connected to the ninth normally open valve 501; the water guide bearing cooler 505 is provided with a first temperature sensor 504, and the first temperature sensor 504 is connected with the signal collector 1; the first pressure transmitter 506, the first flowmeter 507 and the third electrically operated ball valve 508 are connected with the signal collector 1; the third electric ball valve 508 is connected with the valve opening controller 2 and controls the opening thereof. Through the water guide bearing cooling system 5, the water guide bearing can be effectively cooled, so that the safe operation of the water guide bearing is ensured. In a specific operation process, cooling water enters the water guide bearing cooler 505, the water guide bearing is cooled through the water guide bearing cooler 505, the temperature of the water guide bearing cooler 505 is monitored in real time through the first temperature sensor 504, a temperature signal is transmitted to the signal collector 1, the temperature is transmitted to the valve opening controller 2 through the signal collector 1, the opening of the third electric ball valve 508 is controlled through the valve opening controller 2 in a feedback manner, and then the flow of the cooling water inside the water guide bearing cooler 505 is controlled, and then the flow control of the cooling water is realized.
Further, the thrust bearing lower guide bearing cooling system 6 comprises a tenth normally open valve 601, and the tenth normally open valve 601 is communicated with a water outlet pipe of the water taking system 3; a second pressure sensor 602, a second pressure gauge 603, a thrust bearing down-guide bearing cooler 605, a second pressure transmitter 606, a second flowmeter 607 and a fourth electric ball valve 608 are sequentially connected to the tenth normally open valve 601; a second temperature sensor 604 is arranged on the thrust bearing down-guide bearing cooler 605, and the second temperature sensor 604 is connected with the signal collector 1; the second pressure transmitter 606, the second flowmeter 607 and the fourth electrically operated ball valve 608 are connected with the signal collector 1; the fourth electric ball valve 608 is connected to the valve opening controller 2 and controls the opening thereof. The cooling system 6 for the thrust bearing down guide bearing can be used for cooling the thrust bearing down guide bearing, so that the safe operation of the thrust bearing down guide bearing is ensured. In a specific operation process, the temperature of the thrust bearing lower guide bearing cooler 605 is monitored in real time through the second temperature sensor 604, a temperature signal is transmitted to the signal collector 1, the temperature is transmitted to the valve opening controller 2 through the signal collector 1, the opening of the fourth electric ball valve 608 is controlled through the feedback of the valve opening controller 2, and then the flow of cooling water in the thrust bearing lower guide bearing cooler 605 is controlled, and further the flow control of the cooling water is realized.
Further, the generator air cooling system 7 comprises an eleventh normally open valve 701, and the eleventh normally open valve 701 is communicated with a water outlet pipe of the water intake system 3; the eleventh normally open valve 701 is followed by a third pressure sensor 702, a third pressure gauge 703, a generator cooler 705, a third pressure transmitter 706, a third flowmeter 707, and a fifth electrically powered ball valve 708 in sequence; the generator cooler 705 is provided with a third temperature sensor 704, and the third temperature sensor 704 is connected with the signal collector 1; the third pressure transmitter 706, the third flowmeter 707, and the fifth electrically powered ball valve 708 are coupled to the signal collector 1; the fifth electrically operated ball valve 708 is connected to the valve opening controller 2 and controls the opening thereof. The generator air cooling system 7 can be used for cooling down the generator, so that the safe operation of the generator is ensured. In a specific operation process, the temperature of the generator cooler 705 is monitored in real time through the third temperature sensor 704, a temperature signal is transmitted to the signal collector 1, the temperature is transmitted to the valve opening controller 2 through the signal collector 1, the opening of the fifth electric ball valve 708 is controlled through the feedback of the valve opening controller 2, and then the flow of cooling water in the generator cooler 705 is controlled, and further the flow control of the cooling water is realized.
Further, the thrust bearing upper guide bearing cooling system 8 comprises a twelfth normally open valve 801, and the twelfth normally open valve 801 is communicated with a water outlet pipe of the water taking system 3; a fourth pressure sensor 802, a fourth pressure gauge 803, a thrust bearing upper guide bearing cooler 805, a fourth pressure transmitter 806, a fourth flowmeter 807 and a sixth electric ball valve 808 are connected in sequence behind the twelfth normally open valve 801; a fourth temperature sensor 804 is installed on the thrust bearing upper guide bearing cooler 805, and the fourth temperature sensor 804 is connected with the signal collector 1; the fourth pressure transmitter 806, the fourth flowmeter 807 and the sixth electrically operated ball valve 808 are coupled to the signal collector 1; the sixth electric ball valve 808 is connected to the valve opening controller 2 and controls the opening thereof. The upper guide bearing cooling system 8 of the thrust bearing can be used for cooling the upper guide bearing of the thrust bearing, so that the safe operation of the generator is ensured. In a specific operation process, the temperature of the upper guide bearing cooler 805 of the thrust bearing is monitored in real time through the fourth temperature sensor 804, a temperature signal is transmitted to the signal collector 1, the temperature is transmitted to the valve opening controller 2 through the signal collector 1, the opening of the sixth electric ball valve 808 is controlled through the feedback of the valve opening controller 2, and then the flow of cooling water in the upper guide bearing cooler 805 of the thrust bearing is controlled, and further the flow control of the cooling water is realized.
Further, the cooling water discharging system 9 includes a main water discharging pipe 901, and a fifth flowmeter 902, a seventh electric ball valve 903 and a cooling water discharging pipe 904 are sequentially connected to the main water discharging pipe 901; the fifth flowmeter 902 and the seventh electric ball valve 903 are connected with the signal collector 1; the seventh electric ball valve 903 is connected to the valve opening controller 2, and controls the opening thereof. The discharge system 9 of cooling water can be used for the purpose of flow control of the total cooling water of the system. The valve opening of each cooler is controlled through program operation, so that the reasonable flow distribution of each cooler is ensured. And under the condition of reserving certain redundancy, the seventh electric ball valve 903 of the outlet main valve of the water supply system is closed to the maximum extent to achieve the purpose of throttling.
Example 2:
the control method of the water supply throttling system based on temperature control comprises the following steps:
step one: in the running process of the system, cooling water in the volute is introduced into a corresponding water guide bearing cooling system 5, a thrust bearing lower guide bearing cooling system 6, a generator air cooling system 7 and a thrust bearing upper guide bearing cooling system 8 after being filtered and decompressed by the water taking system 3;
step two: during the operation of the water guide bearing cooling system 5, the temperature of the water guide bearing cooler 505 is collected in real time through the first temperature sensor 504, and a temperature signal is transmitted to the signal collector 1; the pipeline pressure is acquired in real time through the first pressure transmitter 506, and the pressure signal is transmitted to the signal acquisition unit 1; the pipeline flow is collected in real time through the first flowmeter 507, and a flow signal is transmitted to the signal collector 1; transmitting the valve opening signal to the signal collector 1 in real time through a third electric ball valve 508; the signal collector 1 transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller 2; the opening of the third electric ball valve 508 is controlled through the feedback of the valve opening controller 2, so that the flow of cooling water in the water guide bearing cooler 505 is controlled, the water guide bearing cooler 505 is ensured to realize the minimum water consumption in the normal cooling process, and the purpose of throttling control is achieved;
step three: during the operation of the thrust bearing down-guide bearing cooling system 6, the temperature of the thrust bearing down-guide bearing cooler 605 is acquired in real time through the second temperature sensor 604, and a temperature signal is transmitted to the signal acquisition device 1; the pipeline pressure is acquired in real time through a second pressure transmitter 606, and the pressure signal is transmitted to the signal acquisition device 1; collecting the pipeline flow in real time through a second flowmeter 607, and transmitting a flow signal to the signal collector 1; transmitting the valve opening signal to the signal collector 1 in real time through a fourth electric ball valve 608; the signal collector 1 transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller 2; the opening of the fourth electric ball valve 608 is controlled through the feedback of the valve opening controller 2, so that the flow of cooling water in the thrust bearing lower guide bearing cooler 605 is controlled, the minimum water consumption is realized in the normal cooling process of the thrust bearing lower guide bearing cooler 605, and the purpose of throttling control is achieved;
step four: during the operation process of the generator air cooling system 7, the temperature of the generator cooler 705 is acquired in real time through the third temperature sensor 704, and a temperature signal is transmitted to the signal acquisition device 1; the pipeline pressure is acquired in real time through a third pressure transmitter 706, and the pressure signal is transmitted to the signal acquisition device 1; the pipeline flow is acquired in real time through a third flowmeter 707, and a flow signal is transmitted to the signal acquisition device 1; transmitting the valve opening signal to the signal collector 1 in real time through a fifth electric ball valve 708; the signal collector 1 transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller 2; the opening of the fifth electric ball valve 708 is controlled through the feedback of the valve opening controller 2, so that the flow of cooling water in the generator cooler 705 is controlled, the minimum water consumption is realized in the normal cooling process of the generator cooler 705, and the purpose of throttling control is achieved;
step five: during the operation of the thrust bearing upper guide bearing cooling system 8, the temperature of the thrust bearing upper guide bearing cooler 805 is acquired in real time through the fourth temperature sensor 804, and a temperature signal is transmitted to the signal acquisition unit 1; the pipeline pressure is acquired in real time through a fourth pressure transmitter 806, and the pressure signal is transmitted to the signal acquisition device 1; collecting the pipeline flow in real time through a fourth flowmeter 807, and transmitting a flow signal to the signal collector 1; transmitting the valve opening signal to the signal collector 1 in real time through a sixth electric ball valve 808; the signal collector 1 transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller 2; the opening of the sixth electric ball valve 808 is controlled through the feedback of the valve opening controller 2, so that the flow of cooling water in the thrust bearing upper guide bearing cooler 805 is controlled, the minimum water consumption is realized in the normal cooling process of the thrust bearing upper guide bearing cooler 805, and the purpose of throttling control is achieved;
step six: before working, the position of the valve is given by a large amount of operation data, and a certain opening degree of the valve is set as a zero position, so that the condition that water is not cut off for a short time even if the valve fails in the system operation process, and the temperature of the cooler is increased is ensured; the valve opening of the electric ball valve of each cooler is controlled through program operation, so that the reasonable flow distribution of each cooler is ensured; under the condition of reserving certain redundancy, the seventh electric ball valve 903 of the system outlet main valve is closed to the maximum extent to achieve the purpose of throttling.
Claims (9)
1. Water supply throttling system based on temperature control, characterized in that: it comprises a water intake system (3) for introducing cooling water; the water taking system (3) is connected with an overflow system (4) for overflowing; the output end of the water taking system (3) is connected in parallel with a water guide bearing cooling system (5) for cooling the water guide bearing, a thrust bearing lower guide bearing cooling system (6) for cooling the thrust bearing lower guide bearing, a generator air cooling system (7) for cooling the generator and a thrust bearing upper guide bearing cooling system (8) for cooling the thrust bearing upper guide bearing; the water guide bearing cooling system (5), the thrust bearing down guide bearing cooling system (6), the generator air cooling system (7) and the thrust bearing up guide bearing cooling system (8) are all connected with the signal collector (1); the signal collector (1) is used for collecting temperature, pipeline pressure, flow and valve opening data of corresponding systems; the signal collector (1) is connected with the valve opening controller (2), and the valve opening controller (2) is connected with the corresponding water guide bearing cooling system (5), the thrust bearing lower guide bearing cooling system (6), the generator air cooling system (7) and the thrust bearing upper guide bearing cooling system (8) through feedback control; the water outlets of the water guide bearing cooling system (5), the thrust bearing lower guide bearing cooling system (6), the generator air cooling system (7) and the thrust bearing upper guide bearing cooling system (8) are connected with a cooling water discharge system (9);
the water taking system (3) comprises a water taking trash rack (301) connected with a water taking port of a volute, a first normally open valve (302) is arranged on a pipeline where the water taking trash rack (301) is located, a first electric ball valve (303) is arranged behind the first normally open valve (302), and a second normally open valve (304), a third normally open valve (305) and a water filter (306) are sequentially arranged behind the first electric ball valve (303); the water filter (306) is connected with an overflow system (4); the other end of the water filter (306) is sequentially connected with a fourth normally open valve (307), a plurality of first butterfly valves (308), a pressure reducing valve (309), a fifth normally open valve (310), a second butterfly valve (312) and a sixth normally open valve (313); and a sixth normally open valve (313) is connected with a water guide bearing cooling system (5), a thrust bearing lower guide bearing cooling system (6), a generator air cooling system (7) and a thrust bearing upper guide bearing cooling system (8) in parallel.
2. A water supply throttling system based on temperature control as set forth in claim 1, wherein: the overflow system (4) comprises two sets of seventh normally open valves (401) and second electric ball valves (402) which are connected in series on the water filter (306); the other ends of the two second electric ball valves (402) are connected with an eighth normally-open valve (403), and the eighth normally-open valve (403) is communicated with a downstream draft tube through an overflow pipe (404).
3. A water supply throttling system based on temperature control as set forth in claim 1, wherein: a safety valve (311) is arranged between the fifth normally open valve (310) and the second butterfly valve (312); the overflow port of the safety valve (311) is communicated with the leakage water collecting well and is used for adjusting and controlling the pressure of the whole system.
4. A water supply throttling system based on temperature control as set forth in claim 1, wherein: the water guide bearing cooling system (5) comprises a ninth normally open valve (501), and the ninth normally open valve (501) is communicated with a water outlet pipe of the water taking system (3); a first pressure sensor (502), a first pressure gauge (503), a water guide bearing cooler (505), a first pressure transmitter (506), a first flowmeter (507) and a third electric ball valve (508) are sequentially connected behind the ninth normally open valve (501); the water guide bearing cooler (505) is provided with a first temperature sensor (504), and the first temperature sensor (504) is connected with the signal collector (1); the first pressure transmitter (506), the first flowmeter (507) and the third electric ball valve (508) are connected with the signal collector (1); the third electric ball valve (508) is connected with the valve opening controller (2) and controls the opening of the valve opening controller.
5. A water supply throttling system based on temperature control as set forth in claim 4, wherein: the thrust bearing downward guide bearing cooling system (6) comprises a tenth normally open valve (601), and the tenth normally open valve (601) is communicated with a water outlet pipe of the water taking system (3); a second pressure sensor (602), a second pressure gauge (603), a thrust bearing down-guide bearing cooler (605), a second pressure transmitter (606), a second flowmeter (607) and a fourth electric ball valve (608) are sequentially connected behind the tenth normally open valve (601); a second temperature sensor (604) is arranged on the thrust bearing down-guide bearing cooler (605), and the second temperature sensor (604) is connected with the signal collector (1); the second pressure transmitter (606), the second flowmeter (607) and the fourth electric ball valve (608) are connected with the signal collector (1); the fourth electric ball valve (608) is connected with the valve opening controller (2) and controls the opening of the fourth electric ball valve.
6. A water supply throttling system based on temperature control as set forth in claim 5, wherein: the generator air cooling system (7) comprises an eleventh normally open valve (701), and the eleventh normally open valve (701) is communicated with a water outlet pipe of the water taking system (3); a third pressure sensor (702), a third pressure gauge (703), a generator cooler (705), a third pressure transmitter (706), a third flowmeter (707) and a fifth electric ball valve (708) are sequentially connected to the eleventh normally open valve (701); a third temperature sensor (704) is arranged on the generator cooler (705), and the third temperature sensor (704) is connected with the signal collector (1); the third pressure transmitter (706), the third flowmeter (707) and the fifth electric ball valve (708) are connected with the signal collector (1); the fifth electric ball valve (708) is connected with the valve opening controller (2) and controls the opening of the valve opening controller.
7. A water supply throttling system based on temperature control as set forth in claim 6, wherein: the thrust bearing upper guide bearing cooling system (8) comprises a twelfth normally open valve (801), and the twelfth normally open valve (801) is communicated with a water outlet pipe of the water taking system (3); a fourth pressure sensor (802), a fourth pressure gauge (803), a thrust bearing upper guide bearing cooler (805), a fourth pressure transmitter (806), a fourth flowmeter (807) and a sixth electric ball valve (808) are sequentially connected behind the twelfth normally open valve (801); a fourth temperature sensor (804) is arranged on the thrust bearing upper guide bearing cooler (805), and the fourth temperature sensor (804) is connected with the signal collector (1); the fourth pressure transmitter (806), the fourth flowmeter (807) and the sixth electric ball valve (808) are connected with the signal collector (1); the sixth electric ball valve (808) is connected with the valve opening controller (2) and controls the opening of the valve opening controller.
8. A water supply throttling system based on temperature control as set forth in claim 7, wherein: the cooling water discharge system (9) comprises a main drain pipe (901), and a fifth flowmeter (902), a seventh electric ball valve (903) and a cooling water drain pipe (904) are sequentially connected behind the main drain pipe (901); the fifth flowmeter (902) and the seventh electric ball valve (903) are connected with the signal collector (1); the seventh electric ball valve (903) is connected with the valve opening controller (2) and controls the opening of the seventh electric ball valve.
9. A control method of a water supply throttling system based on temperature control as set forth in claim 8, comprising the steps of:
step one: in the running process of the system, cooling water in the volute is introduced into a corresponding water guide bearing cooling system (5), a thrust bearing lower guide bearing cooling system (6), a generator air cooling system (7) and a thrust bearing upper guide bearing cooling system (8) after being filtered and decompressed by a water taking system (3);
step two: in the running process of the water guide bearing cooling system (5), the temperature of the water guide bearing cooler (505) is acquired in real time through the first temperature sensor (504), and a temperature signal is transmitted to the signal acquisition device (1); collecting pipeline pressure in real time through a first pressure transmitter (506), and transmitting a pressure signal to a signal collector (1); collecting pipeline flow in real time through a first flowmeter (507) and transmitting a flow signal to a signal collector (1); transmitting a valve opening signal to a signal collector (1) in real time through a third electric ball valve (508); the signal collector (1) transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller (2); the opening of the third electric ball valve (508) is controlled in a feedback way through the valve opening controller (2), so that the flow of cooling water in the water guide bearing cooler (505) is controlled, the water guide bearing cooler (505) is ensured to realize the minimum water consumption in the normal cooling process, and the purpose of throttling control is achieved;
step three: in the running process of the thrust bearing down-guide bearing cooling system (6), the temperature of the thrust bearing down-guide bearing cooler (605) is acquired in real time through a second temperature sensor (604), and a temperature signal is transmitted to the signal acquisition device (1); collecting pipeline pressure in real time through a second pressure transmitter (606), and transmitting a pressure signal to a signal collector (1); collecting pipeline flow in real time through a second flowmeter (607), and transmitting a flow signal to a signal collector (1); transmitting a valve opening signal to a signal collector (1) in real time through a fourth electric ball valve (608); the signal collector (1) transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller (2); the opening of the fourth electric ball valve (608) is controlled in a feedback way through a valve opening controller (2), so that the flow of cooling water in the thrust bearing lower guide bearing cooler (605) is controlled, the minimum water consumption is realized in the normal cooling process of the thrust bearing lower guide bearing cooler (605), and the purpose of throttling control is achieved;
step four: in the running process of the generator air cooling system (7), the temperature of a generator cooler (705) is acquired in real time through a third temperature sensor (704), and a temperature signal is transmitted to a signal acquisition device (1); collecting pipeline pressure in real time through a third pressure transmitter (706), and transmitting a pressure signal to a signal collector (1); collecting pipeline flow in real time through a third flowmeter (707), and transmitting a flow signal to a signal collector (1); transmitting a valve opening signal to a signal collector (1) in real time through a fifth electric ball valve (708); the signal collector (1) transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller (2); the opening of the fifth electric ball valve (708) is controlled in a feedback way through the valve opening controller (2), so that the flow of cooling water in the generator cooler (705) is controlled, the minimum water consumption is realized in the normal cooling process of the generator cooler (705), and the purpose of throttling control is achieved;
step five: in the running process of the thrust bearing upper guide bearing cooling system (8), the temperature of the thrust bearing upper guide bearing cooler (805) is acquired in real time through a fourth temperature sensor (804), and a temperature signal is transmitted to the signal acquisition device (1); collecting pipeline pressure in real time through a fourth pressure transmitter (806), and transmitting a pressure signal to a signal collector (1); collecting pipeline flow in real time through a fourth flowmeter (807), and transmitting a flow signal to a signal collector (1); transmitting a valve opening signal to a signal collector (1) in real time through a sixth electric ball valve (808); the signal collector (1) transmits the collected temperature, pipeline pressure, pipeline flow and valve opening data to the valve opening controller (2); the opening of a sixth electric ball valve (808) is controlled through the feedback of a valve opening controller (2), so that the flow of cooling water in the thrust bearing upper guide bearing cooler (805) is controlled, the minimum water consumption is realized in the normal cooling process of the thrust bearing upper guide bearing cooler (805), and the purpose of throttling control is achieved;
step six: before working, the position of the valve is given by a large amount of operation data, and a certain opening degree of the valve is set as a zero position, so that the condition that water is not cut off for a short time even if the valve fails in the system operation process, and the temperature of the cooler is increased is ensured; the valve opening of the electric ball valve of each cooler is controlled through program operation, so that the reasonable flow distribution of each cooler is ensured; under the condition of reserving certain redundancy, the seventh electric ball valve (903) of the system outlet main valve is closed to the maximum extent to achieve the purpose of throttling.
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| CN202210125895.6A CN114542356B (en) | 2022-02-10 | 2022-02-10 | Water supply throttling system based on temperature control and control method |
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| US7086486B2 (en) * | 2004-02-05 | 2006-08-08 | Bj Services Company | Flow control valve and method of controlling rotation in a downhole tool |
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| CN102353196A (en) * | 2011-09-29 | 2012-02-15 | 中水珠江规划勘测设计有限公司 | Cooling water supply system of bulb tubular turbine generator set |
| JP2013104250A (en) * | 2011-11-15 | 2013-05-30 | Chugoku Electric Power Co Inc:The | Water supply flow controller of hydraulic power station, and water supply flow control method thereof |
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