CN112483204A - Control method and control device for auxiliary equipment system after shutdown of generator set - Google Patents
Control method and control device for auxiliary equipment system after shutdown of generator set Download PDFInfo
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- CN112483204A CN112483204A CN202011239945.0A CN202011239945A CN112483204A CN 112483204 A CN112483204 A CN 112483204A CN 202011239945 A CN202011239945 A CN 202011239945A CN 112483204 A CN112483204 A CN 112483204A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention provides a control method and a control device of an auxiliary equipment system after a generator set is stopped, wherein the generator set comprises a generator and a boiler, the auxiliary equipment system comprises a steam pump set and a condensate pump, and the method comprises the following steps: determining that the steam pump set is stopped and the boiler is flamed out, acquiring the lowest flow of the condensed water required by the boiler, and determining the working current of the condensed water pump corresponding to the lowest flow; acquiring the cylinder temperature of the generator and the steam pump rotating speed of the steam pump set, and determining the working time of the condensed water pump based on the cylinder temperature and the steam pump rotating speed; and controlling the operation of the condensed water pump based on the working current and the working time. The method has the advantages that on the premise of ensuring that the generator set is normally stopped and cooled, the working current of the condensate pump is reduced, the time node for releasing pressure and draining water of the steam pump is advanced, the condensate pump is stopped in advance, and the power consumption of the condensate pump after the power plant is stopped is reduced.
Description
Technical Field
The invention relates to the technical field of energy conservation of power plants, in particular to a control method of an auxiliary equipment system after a generator set is stopped and a control device of the auxiliary equipment system after the generator set is stopped.
Background
After a steam turbine generator unit is disconnected from a generator and a boiler MFT (boiler flameout), a plurality of auxiliary equipment still need to be kept in operation to ensure that main equipment such as a steam turbine, the boiler and a generator can be safely stopped, the auxiliary equipment still consumes a large amount of electricity after the unit is stopped, especially, a large amount of electric energy is consumed due to long-time operation of a high-power motor, and a condensate pump is one of the auxiliary equipment.
After the generator set stops running until the flash evaporation of the condenser vacuum reheater is maintained or a condensate water user exists, the condensate pump needs to keep running to supply the shaft seal system with the desuperheating water and provide a water source for the condensate water user, the condensate pump is a main device in the condensate system and mainly used for increasing the pressure of the condensate water collected in the condenser hot well to a certain value and then sending the condensate water to the deaerator for deaerating through low pressure. The power plant unit need carry out boiler MFT in proper order after the generator is split, maintain the operation that vacuum reheater flash distillation, steam pump group pressure release were drained, could stop the condensate pump, however, in the reheater flash distillation stage, condensate pump operating current is big, and the steam pump group drainage stage condensate pump idle running time is long, power consumptive quantity is high, causes the energy extravagant.
Disclosure of Invention
The invention aims to provide a control method of an auxiliary equipment system after a generator set is shut down, and the control method is used for at least solving the problems that the operating current of a condensate pump is large, the invalid operating time of the condensate pump is long in the water discharging stage of a steam pump set, the power consumption is high, and energy is wasted.
In order to achieve the above object, a first aspect of the present invention provides a method for controlling an auxiliary equipment system after a generator set is shut down, the generator set including a generator and a boiler, the auxiliary equipment system including a steam-pump group and a condensate pump, the method including:
determining that the steam pump set is stopped and the boiler is flamed out, acquiring the lowest flow of the condensed water required by the boiler, and determining the working current of the condensed water pump corresponding to the lowest flow;
acquiring the cylinder temperature of the generator and the steam pump rotating speed of the steam pump set, and determining the working time of the condensed water pump based on the cylinder temperature and the steam pump rotating speed;
and controlling the operation of the condensed water pump based on the working current and the working time.
Optionally, the working current of the condensate pump corresponding to the lowest flow rate is determined by the following method:
wherein I is the working current of the condensed water pump, rho is the density of the condensed water, g is the gravity acceleration, H is the lift of the condensed water pump,
the average value of the working voltage of the condensate pump is shown, eta is the mechanical efficiency of the condensate pump, v is the flow velocity of the condensate at the outlet of the condensate pump, D is the pipe diameter of a condensate water conveying pipeline, and the relation between the pipe diameter of the condensate water conveying pipeline and the lowest flow is as follows:
optionally, when the working current of the condensate pump corresponding to the lowest flow rate is less than the minimum current of the condensate pump, controlling the condensate pump to keep operating at the minimum current.
Optionally, the obtaining a cylinder temperature of the generator and a steam pump rotation speed of the steam pump group, and determining an operating time of the condensed water pump based on the cylinder temperature and the steam pump rotation speed includes:
determining the starting moment of the working time based on the steam pump rotating speed of the steam pump group;
determining an end time of the operating time based on a cylinder temperature of the generator.
Optionally, if the determined working time is less than a preset working time threshold, after the starting time of the working time is determined, the preset working time threshold is used as the working time.
Optionally, the determining the starting time of the working time based on the steam pump rotation speed of the steam pump group includes:
and acquiring the rotating speed of the steam pump group in real time, and taking the moment when the rotating speed of the steam pump is lower than a preset rotating speed threshold value as the starting moment of the working time.
Optionally, the method further includes:
the method comprises the steps that a steam pump group stops running for a first preset time, the steam pump rotating speed of the steam pump group is obtained, and if the steam pump rotating speed is not lower than a preset rotating speed threshold value, a first warning is generated;
and the condensate pump starts to work for a second preset time, the steam pump rotating speed of the steam pump set is obtained, and if the steam pump rotating speed is lower than a preset rotating speed threshold value and is not equal to zero, a second warning is generated.
Optionally, the method further includes:
and controlling the air pump set to release pressure and discharge water at the end time of the working time.
Optionally, the method further includes:
the duration and system power consumption in the auxiliary equipment system control are stored.
The second aspect of the present invention provides a control device for an auxiliary equipment system after a generator set is shut down, the auxiliary equipment system is controlled by using the above method, the generator set includes a generator and a boiler, the auxiliary equipment system includes a steam pump set and a condensate pump, the device includes:
the working current determining module is used for acquiring the lowest flow of the condensed water required by the boiler and determining the working current of the condensed water pump corresponding to the lowest flow under the condition that the steam pump set is determined to be stopped and the boiler is determined to be flamed out;
the working time determining module is used for acquiring the cylinder temperature of the generator and the steam pump rotating speed of the steam pump set and determining the working time of the condensed water pump based on the cylinder temperature and the steam pump rotating speed;
and the control module is used for controlling the operation of the condensed water pump based on the working current and the working time.
According to the control method and device for the auxiliary equipment system after the generator set is shut down, the working current of the condensate pump is reduced on the premise that the normal shutdown and cooling of the generator set are guaranteed, the time node for releasing pressure and draining water of the steam pump is advanced, the condensate pump is shut down in advance, and the power consumption of the condensate pump after the power plant is shut down is reduced.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a flow chart of a method of controlling an auxiliary equipment system after a generator set is shut down, provided by the present invention;
fig. 2 is a block diagram of a control device of an auxiliary equipment system after a generator set is shut down according to the present invention.
Description of the reference numerals
10-an operating current determination module; 20-a working time determination module; 30-control module.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a flowchart of a method for controlling an auxiliary equipment system after a generator set is shut down according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a method for controlling an auxiliary equipment system after a generator set is shut down, where the generator set includes a generator and a boiler, the auxiliary equipment system includes a steam-pump set and a condensate pump, and the method includes:
102, acquiring the cylinder temperature of the generator and the steam pump rotating speed of the steam pump set, and determining the working time of the condensed water pump based on the cylinder temperature and the steam pump rotating speed;
and 103, controlling the operation of the condensed water pump based on the working current and the working time.
After the generating set shut down, at first the steam pump stops the operation, after a period of time, the boiler stalls, after the boiler stalls, auxiliary assembly still needs certain water to cool off and the shaft seal, still need maintain condensate pump's operation, however, when condensate pump operates, power consumption is higher and have invalid moving problem, shut down the cooling in-process at equipment, compare with the normal condition, can be under the condition that satisfies the condensate demand, make the operating current of condensate pump minimum, operating time is the shortest.
Further, the operating current of the condensate pump corresponding to the lowest flow rate is determined by:
wherein I is the working current of the condensed water pump, rho is the density of the condensed water, g is the gravity acceleration, H is the lift of the condensed water pump,
the average value of the working voltage of the condensate pump is shown, eta is the mechanical efficiency of the condensate pump, v is the flow velocity of the condensate at the outlet of the condensate pump, D is the pipe diameter of a condensate water conveying pipeline, and the relation between the pipe diameter of the condensate water conveying pipeline and the lowest flow is as follows:
specifically, in the working process of the condensate pump, the larger the pipeline flow is, the larger the corresponding condensate pump current is, and the lift H is decreased with the increase of the flow Q, after the equipment is installed, the lift H can be directly determined, the corresponding relationship between the pipe diameter D of the condensate water pipeline and the minimum flow Q is obtained by obtaining the minimum flow of the condensate water required by the boiler or by collecting the pipe diameter D of the condensate water pipeline and the flow velocity v of the condensate water at the outlet of the condensate pump, and then the corresponding relationship between the working current of the condensate pump and the minimum flow of the condensate water required by the boiler is obtained by using the flow-current relational expression, and the working current of the condensate pump is determined according to the obtained result.
In the in-service use, because after the equipment fixing debugs, condensate pump's condensate water pipeline pipe diameter size has been confirmed to a fixed value, and the minimum flow of the required condensate water of boiler also can be confirmed, therefore, in condensate pump operation process, can also gather the corresponding data of the minimum flow of the electric current of condensate pump during operation and the required condensate water of boiler, and can arrange the corresponding change relation between the minimum flow that obtains condensate pump operating current and the required condensate water of boiler according to corresponding data, can obtain condensate pump operating current when obtaining minimum flow from the multiunit historical data of gathering equally, thereby control condensate pump, when guaranteeing to supply the minimum flow of the required condensate water of boiler, the power consumption of furthest reduction condensate pump.
Further, when the working current of the condensate pump corresponding to the lowest flow is smaller than the minimum current of the condensate pump, controlling the condensate pump to keep the minimum current operation.
When the generator set normally works, the condensate pump is automatically controlled under the control of the condensate pump frequency converter, after the generator set stops running, the condensate pump frequency converter is withdrawn, so that the working current of the condensate pump can be manually adjusted, the minimum working current of the condensate pump is a known value, but the corresponding working current calculated according to the minimum flow of the condensate water required by the boiler is smaller than the minimum working current of the condensate pump, and at the moment, the minimum working current of the condensate pump cannot be adjusted, so that the condensate pump is directly controlled to run at the minimum working current.
Further, the acquiring a cylinder temperature of the generator and a steam pump rotating speed of the steam pump set, and determining an operating time of the condensed water pump based on the cylinder temperature and the steam pump rotating speed includes:
determining the starting moment of the working time based on the steam pump rotating speed of the steam pump group;
determining an end time of the operating time based on a cylinder temperature of the generator.
After the steam pump set stops running and the boiler is shut down, the steam pump rotating speed of the steam pump set and the temperature of the boiler start to be reduced, and the requirement for the amount of condensed water is greatly reduced in comparison with normal operation in the steam pump speed reduction process of the steam pump set and the boiler temperature reduction process, so that the starting time of the operation time is determined according to the steam pump rotating speed of the steam pump set; and determining the ending time of the working time based on the cylinder temperature of the generator, thereby counting the working time of the condensate pump, ensuring that the supply of the condensate can meet the working requirement, and simultaneously shortening the working time of the condensate pump so as to save the power consumption of the condensate pump.
Further, if the determined working time is less than a preset working time threshold, after the starting time of the working time is determined, the preset working time threshold is used as the working time.
The preset working time threshold value is set, so that the supply time of the condensed water is ensured, the rotating speed of the steam pump and the temperature of the cylinder can reach the minimum standard, and the equipment is prevented from being damaged.
Further, the determining the starting time of the working time based on the steam pump rotating speed of the steam pump group includes:
and acquiring the rotating speed of the steam pump group in real time, and taking the moment when the rotating speed of the steam pump is lower than a preset rotating speed threshold value as the starting moment of the working time.
Further, the method further comprises:
the method comprises the steps that a steam pump group stops running for a first preset time, the steam pump rotating speed of the steam pump group is obtained, and if the steam pump rotating speed is not lower than a preset rotating speed threshold value, a first warning is generated;
and the condensate pump starts to work for a second preset time, the steam pump rotating speed of the steam pump set is obtained, and if the steam pump rotating speed is lower than a preset rotating speed threshold value and is not equal to zero, a second warning is generated.
After the steam pump stops running, the inertia has a certain rotating speed, but the rotating speed of the steam pump begins to reduce along with time, in the existing regulation, when the rotating speed of the steam pump is reduced to a certain value, the starting time of the steam pump barring can be counted, after the specified barring time, the steam pump set can be controlled to release pressure and drain water, so as to stop the condensate pump, in the actual use process, a first preset duration can be set, after the first preset duration from the stopping time of the steam pump set, the boiler is controlled to stop working, meanwhile, the rotating speed of the steam pump is detected, if the rotating speed of the steam pump can be reduced below the rotating speed threshold, at the moment, the steam pump barring is started, the supply of the condensate water is synchronously reduced, however, under the condition of abnormal water, a certain influence can be generated on the rotating speed of the steam pump, after the first preset duration, the rotating speed of the steam pump can not be reduced below the rotating speed threshold, so as to cause the abnormal rotating speed, at the moment, a first warning signal needs to be generated to warn an operator and remind the operator to perform corresponding operation; similarly, in a general situation, the rotation speed of the steam pump is gradually reduced to zero until the steam pump does not rotate completely with the lapse of time, but the rotation speed of the steam pump cannot be reduced to zero under the condition that the shaft seal of the steam pump set is not damaged, so that after the operation of the condensate pump is controlled, the starting time of the operation time of the condensate pump is taken as the starting time, whether the rotation speed of the air pump is reduced to zero is detected after a second preset time period, and if the rotation speed of the air pump is not reduced to zero, a second warning signal is generated to remind an operator of corresponding operation, wherein the first warning and the second warning can be easily distinguished, and reminding can be performed by generating different colors which are easy to distinguish and/or generating different warning tones.
Presetting a working time threshold of a condensate pump, wherein the preset working time threshold is set according to actual use conditions, when the starting time of the working time is determined based on the steam pump rotating speed of the steam pump group, the starting time of the condensate pump is obtained, then the ending time of the working time is determined based on the cylinder temperature of the generator, the time for the condensate pump to stop working is obtained, and the total working time of the condensate pump can be obtained through the ending time and the starting time, but because the mode for obtaining the starting time of the condensate pump is to obtain the rotating speed of the steam pump, and the time when the rotating speed of the steam pump is lower than the preset rotating speed threshold is used as the starting time of the working time; acquiring the temperature of a cylinder, and taking the moment when the temperature of the cylinder is lower than a preset temperature threshold value as the finishing moment of the working time; in the actual working process, the reduction of the rotating speed of the steam pump and the reduction of the temperature of the cylinder are influenced by more factors and possibly generate abnormity, so that the preset working time threshold of the condensate pump is set, and the condensate pump is prevented from being withdrawn to reduce the service life of equipment when the cooling time of the equipment does not reach the minimum time limit.
Further, the method further comprises:
and controlling the air pump set to release pressure and discharge water at the end time of the working time.
And after the ending moment of the working time is determined, the air pump set is controlled to release pressure and drain water, the deaerator can be synchronously controlled to drain water in the process of controlling the air pump set to release pressure and drain water, and the condensate pump is stopped after the air pump set releases pressure and drains water.
Further, the method further comprises:
the duration and system power consumption in the auxiliary equipment system control are stored.
In the control process of the auxiliary equipment system, the control duration can be adjusted according to the actual situation, the control duration is different, and the system power consumption can generate corresponding change, so that in the actual operation process, the duration and the system power consumption in the auxiliary equipment system control are stored, after long-time accumulation and statistics, data support can be provided for follow-up big data analysis, the system control is improved in adaptability according to the big data analysis, and a better energy-saving effect is achieved.
Fig. 2 is a block diagram of a control device of an auxiliary equipment system after a generator set is shut down according to an embodiment of the present invention. As shown in fig. 2, an embodiment of the present invention provides a control device for an auxiliary equipment system after a generator set is shut down, the auxiliary equipment system is controlled by using the above method, the generator set includes a generator and a boiler, the auxiliary equipment system includes a steam-pump set and a condensate pump, and the device includes:
the working current determining module 10 is configured to, when it is determined that the steam pump set is stopped and the boiler is turned off, obtain a minimum flow rate of condensed water required by the boiler, and determine a working current of the condensed water pump corresponding to the minimum flow rate;
the working time determining module 20 is used for acquiring the cylinder temperature of the generator and the steam pump rotating speed of the steam pump group, and determining the working time of the condensed water pump based on the cylinder temperature and the steam pump rotating speed;
and the control module 30 is used for controlling the operation of the condensed water pump based on the working current and the working time.
Example 1:
in this embodiment, an a steam pump and a B steam pump in a generator set are taken as objects, the B steam pump is withdrawn when the load of the generator set is about 300MW, the a steam pump is withdrawn when the load of the generator set is about 200MW, and analysis is performed, because the analysis methods of the a steam pump and the B steam pump are the same, here, calculation is performed by using the turning time of the a steam pump with the later withdrawal time, the load of the a steam pump is 200MW to 30 minutes after disconnection, in this process, the rotation speed of the steam pump is measured in real time, after the rotation speed of the steam pump is lower than a preset rotation speed threshold, the start working time of the condensate pump is counted, after 30 minutes, a boiler is turned off (MFT), at this time, the rotation speed of the steam pump is lower than the preset rotation speed threshold, the condensate pump is withdrawn for automatic operation, and the frequency converter instruction of the condensate pump is reduced to the lowest instruction: rho is the density of condensed water and is generally 1000kg/m3G is the gravity acceleration, H is the delivery lift of the condensed water pump,
is the average value of the operating voltage of the condensate pump, eta is the mechanical efficiency of the condensate pump, v is the flow rate of the condensate at the outlet of the condensate pump, D is the condensateThe relationship between the pipe diameter of the condensate water conveying pipeline and the lowest flow is as follows:
and calculating to obtain the working current I of the condensate pump, controlling the condensate pump to operate at the lowest current, maintaining the condenser vacuum for 3 hours in the process of reheater flash evaporation, enabling the temperature of a boiler cylinder to reach the standard at most 4 hours after MFT of the boiler, taking the moment as the operation ending time of the condensate pump, discharging water from a steam pump group, and stopping the condensate pump after the pressure relief and water discharge of the steam pump group are ended. The total process takes about 5 hours, and compared with ten hours in the prior art, the total process saves 5 hours of the running time of the condensate pump and can greatly reduce the plant power rate.
Sometimes, the rotating speed of the steam pump cannot be reduced to zero under the condition that a shaft seal of the steam pump set is not damaged, if the rotating speed of the steam pump is completely reduced to zero, the investment time of a turning gear of the steam pump is delayed when the condensed water pump is controlled to work, therefore, a preset rotating speed threshold value of 100r/min is set for the steam pump, when the rotating speed of the steam pump reaches below 100r/min, the 4-hour time of the turning gear of the steam pump is counted, so that a time node for releasing pressure and draining water of the steam pump is brought forward, the condensed water pump is stopped in advance, and the power consumption of the condensed water pump after a power plant is shut down is reduced.
The invention aims to provide a control method and a control device for an auxiliary equipment system after a generator set is stopped, which can reduce the working current of a condensate pump on the premise of ensuring the normal stop and cooling of the generator set, and can stop the condensate pump in advance by a time node for releasing pressure and draining water of an air pump and reduce the power consumption of the condensate pump after a power plant is stopped.
Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
While the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications are within the scope of the embodiments of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for the various possible combinations.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as disclosed in the embodiments of the present invention as long as it does not depart from the spirit of the embodiments of the present invention.
Claims (10)
1. A method of controlling an auxiliary equipment system after a generator set is shut down, the generator set including a generator and a boiler, the auxiliary equipment system including a steam-pump stack and a condensate pump, the method comprising:
determining that the steam pump set is stopped and the boiler is flamed out, acquiring the lowest flow of the condensed water required by the boiler, and determining the working current of the condensed water pump corresponding to the lowest flow;
acquiring the cylinder temperature of the generator and the steam pump rotating speed of the steam pump set, and determining the working time of the condensed water pump based on the cylinder temperature and the steam pump rotating speed;
and controlling the operation of the condensed water pump based on the working current and the working time.
2. The method of claim 1, wherein the operating current of the condensate pump corresponding to the minimum flow rate is determined by:
wherein I is the working current of the condensed water pump, rho is the density of the condensed water, g is the gravity acceleration, H is the lift of the condensed water pump,
the average value of the working voltage of the condensate pump is shown, eta is the mechanical efficiency of the condensate pump, v is the flow velocity of the condensate at the outlet of the condensate pump, D is the pipe diameter of a condensate water conveying pipeline, and the relation between the pipe diameter of the condensate water conveying pipeline and the lowest flow is as follows:
3. the method of claim 1, wherein the condensate pump is controlled to maintain minimum current operation when the operating current of the condensate pump corresponding to the minimum flow rate is less than the minimum current of the condensate pump.
4. The method for controlling an auxiliary equipment system after shutdown of a generator set according to claim 1, wherein the obtaining of the cylinder temperature of the generator and the steam pump speed of the steam pump group and the determining of the operation time of the condensed water pump based on the cylinder temperature and the steam pump speed comprise:
determining the starting moment of the working time based on the steam pump rotating speed of the steam pump group;
determining an end time of the operating time based on a cylinder temperature of the generator.
5. The method of claim 4, wherein if the determined on-time is less than a preset on-time threshold, the on-time threshold is used as the on-time after the start time of the on-time is determined.
6. The method for controlling an auxiliary equipment system after a generator set is shut down according to claim 4, wherein the determining the starting moment of the working time based on the steam pump rotating speed of the steam pump group comprises:
and acquiring the rotating speed of the steam pump group in real time, and taking the moment when the rotating speed of the steam pump is lower than a preset rotating speed threshold value as the starting moment of the working time.
7. The method of controlling a genset shutdown auxiliary equipment system in accordance with claim 6 further comprising:
the method comprises the steps that a steam pump group stops running for a first preset time, the steam pump rotating speed of the steam pump group is obtained, and if the steam pump rotating speed is not lower than a preset rotating speed threshold value, a first warning is generated;
and the condensate pump starts to work for a second preset time, the steam pump rotating speed of the steam pump set is obtained, and if the steam pump rotating speed is lower than a preset rotating speed threshold value and is not equal to zero, a second warning is generated.
8. The method of controlling a genset shutdown auxiliary equipment system in accordance with claim 4 or 5 further comprising:
and controlling the air pump set to release pressure and discharge water at the end time of the working time.
9. The method of controlling a genset shutdown auxiliary equipment system in accordance with claim 1 further comprising:
the duration and system power consumption in the auxiliary equipment system control are stored.
10. A control device for an auxiliary equipment system after a power generating unit is shut down, the auxiliary equipment system being controlled by the method of any one of claims 1 to 9, the power generating unit comprising a generator and a boiler, the auxiliary equipment system comprising a steam-pump group and a condensate pump, the device comprising:
the working current determining module is used for acquiring the lowest flow of the condensed water required by the boiler and determining the working current of the condensed water pump corresponding to the lowest flow under the condition that the steam pump set is determined to be stopped and the boiler is determined to be flamed out;
the working time determining module is used for acquiring the cylinder temperature of the generator and the steam pump rotating speed of the steam pump set and determining the working time of the condensed water pump based on the cylinder temperature and the steam pump rotating speed;
and the control module is used for controlling the operation of the condensed water pump based on the working current and the working time.
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| CN112502793A (en) * | 2020-11-29 | 2021-03-16 | 国网辽宁省电力有限公司电力科学研究院 | Debugging plan debugging method for professional subsystem of power plant steam turbine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112502793A (en) * | 2020-11-29 | 2021-03-16 | 国网辽宁省电力有限公司电力科学研究院 | Debugging plan debugging method for professional subsystem of power plant steam turbine |
| CN112502793B (en) * | 2020-11-29 | 2023-06-02 | 国网辽宁省电力有限公司电力科学研究院 | Method for debugging program of specialized subsystem of steam turbine of power plant |
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| CN112483204B (en) | 2022-09-09 |
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