CN117328984A - Method and system for adjusting water supply pump of technical water supply system - Google Patents
Method and system for adjusting water supply pump of technical water supply system Download PDFInfo
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- CN117328984A CN117328984A CN202311278369.4A CN202311278369A CN117328984A CN 117328984 A CN117328984 A CN 117328984A CN 202311278369 A CN202311278369 A CN 202311278369A CN 117328984 A CN117328984 A CN 117328984A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 54
- 239000000498 cooling water Substances 0.000 claims abstract description 162
- 230000008859 change Effects 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000004458 analytical method Methods 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 14
- 238000004590 computer program Methods 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 abstract description 6
- 238000011217 control strategy Methods 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 abstract description 5
- 238000010977 unit operation Methods 0.000 abstract description 5
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 108010001267 Protein Subunits Proteins 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The application relates to the regulation of a water supply pump of a technical water supply system, the method comprising: the method comprises the steps of obtaining characteristic data of a generator set at each target air temperature from historical operation data of the generator set, obtaining first cooling water flow corresponding to the generator set in different load intervals according to the characteristic data, obtaining second cooling water flow corresponding to the generator set in different load intervals based on a cooling water flow estimation model, and obtaining an energy efficiency optimization control strategy of the generator set according to the first cooling water flow, the second cooling water flow and a hydraulic performance curve of a water supply pump. Through the method and the device, the problem of low safety in the operation process of the water supply system is solved, the energy efficiency optimization control strategy is obtained through the historical operation data, the unit operation frequency and the power are adjusted according to the actual operation working conditions, the unreasonable unit operation frequency and the unreasonable unit operation power are prevented, the unit cannot be operated safely, and meanwhile, the unit is adjusted based on the energy efficiency optimization control strategy, and the unit operation efficiency can be effectively improved.
Description
Technical Field
The present application relates to the field of water supply system automation, and in particular, to a method, system, electronic device and storage medium for adjusting a water supply pump of a technical water supply system.
Background
The technical water supply system belongs to one of the water supply systems of the hydropower station, has the functions of cooling, lubrication and sealing, and mainly bears the cooling tasks of thrust bearings, guide bearings, air coolers, guide bearings of the water turbine and main transformers of the generator.
In the related art, the technical water supply pump operates as a main pump in a fixed-frequency mode, the power consumption is larger in proportion to the station service power, meanwhile, the intelligent degree of equipment is low, intelligent flow adjustment cannot be realized along with the change of different operation working conditions of the unit, the cooling or lubricating capacity is insufficient under part of working conditions, the equipment is locally overheated, and the safe operation of the unit equipment is endangered.
Disclosure of Invention
The embodiment of the application provides a method, a system, electronic equipment and a storage medium for adjusting a water supply pump of a technical water supply system, so as to at least solve the problem of low safety in the operation process of the water supply system in the related technology.
In a first aspect, an embodiment of the present application provides a method for adjusting a water supply pump of a technical water supply system, the method including:
respectively acquiring characteristic data representing the running state of the generator set at each first target air temperature from historical running data of the generator set;
according to the characteristic data, respectively obtaining first cooling water flow corresponding to each load interval of the generator set;
Respectively obtaining second cooling water flows of the generator set corresponding to different load intervals under each second target air temperature based on a cooling water flow estimation model, wherein the cooling water flow estimation model is constructed based on the cooling water flows and the air temperatures in the historical operation data, and the second target air temperatures are air temperatures except the first target air temperatures;
and determining an adjusting instruction corresponding to the target air temperature and the target load interval according to the first cooling water flow, the second cooling water flow and the hydraulic performance curve of the water supply pump.
In some embodiments, according to the characteristic data, obtaining the first cooling water flow rate of the generator set corresponding to different load intervals includes:
obtaining the average value of the bearing temperatures of the water supply pumps corresponding to the load sections under the first target air temperatures according to the characteristic data;
acquiring a temperature difference value between the bearing temperature average value and a preset temperature threshold value;
and obtaining the first cooling water flow required by different load sections under the first target air temperature according to the temperature difference value and the characteristic data.
In some of these embodiments, obtaining the first cooling water flow rate required for the different load zones at the first target air temperature according to the temperature difference value and the characteristic data includes:
Acquiring first water flow data of each branch of the generator set from the characteristic data under the condition that the temperature difference is in a preset difference range, and determining the first cooling water flow according to the first water flow data based on a pipeline hydraulic loss model, wherein the pipeline hydraulic loss model represents the relation between the total pipeline loss and the cooling water flow of the technical water supply system;
sending an opening adjusting instruction to the flow adjusting valve to instruct the flow adjusting valve to adjust the temperature difference to the preset difference range by adjusting the opening of the valve under the condition that the temperature difference is not in the preset difference range,
and under the condition that the bearing temperature fluctuation is smaller than a preset fluctuation threshold value, acquiring second water flow data of each branch of the current generator set, and determining the first cooling water flow according to the second water flow data based on a pipeline hydraulic loss model.
In some embodiments, according to the characteristic data, obtaining the first cooling water flow rate of the generator set corresponding to different load intervals at the first target air temperature includes:
generating an operation instruction according to a first target air temperature and a load interval corresponding to missing data when the missing data exists in the characteristic data;
Sending the operation instruction to the generator set to obtain supplementary operation data of the generator set in a first target gas temperature and load interval corresponding to the missing data;
and obtaining a first cooling water flow rate under a first target air temperature and load interval corresponding to the missing data according to the supplementary operation data.
In some of these embodiments, determining the adjustment command corresponding to the target air temperature and the target load interval based on the first cooling water flow rate, the second cooling water flow rate, and the hydraulic performance curve of the water supply pump includes:
determining a set target rotating speed corresponding to a target air temperature and a target load interval according to the first cooling water flow, the second cooling water flow and the hydraulic performance curve;
and obtaining an adjusting instruction corresponding to the target air temperature and the target load interval based on the target rotating speed of the unit, wherein the adjusting instruction comprises a frequency adjusting instruction and a power adjusting instruction.
In some embodiments, before the generating set obtains the second cooling water flow corresponding to the different load intervals under the condition of respectively obtaining each second target air temperature based on the cooling water flow estimation model, the method further includes:
Arranging the historical operation data in an inverse order according to the air temperature values, and acquiring the historical operation data under the third target air temperature according to the arrangement result;
obtaining tile temperature change data and cooling water flow corresponding to different load intervals under the third target air temperature according to the historical operation data of the third target air temperature;
based on a stepwise regression method, the cooling water flow estimation model is constructed according to the tile temperature change data and the cooling water flow corresponding to different load regions at the third target air temperature.
In some embodiments, the obtaining, from the historical operation data of the generator set, the feature data characterizing the operation state of the generator set at each first target air temperature includes:
screening stable operation data from the historical operation data according to preset screening conditions, wherein the preset screening conditions comprise: the power of the water supply pump is larger than zero, the active load of the generator set is larger than zero, the stable running time is larger than a preset time threshold value, and the watt temperature change value is smaller than a preset temperature rise threshold value;
and obtaining the characteristic data corresponding to the first target air temperature from the stable operation data.
In a second aspect, embodiments of the present application provide a system for regulating a water supply pump of a technical water supply system, the system comprising: the system comprises a data acquisition module, a first analysis module, a second analysis module and an instruction generation module, wherein,
The data acquisition module is used for respectively acquiring characteristic data representing the running state of the generator set at each first target air temperature from the historical running data of the generator set;
the first analysis module is used for respectively obtaining first cooling water flow corresponding to each load interval of the generator set according to the characteristic data;
the second analysis module is used for respectively obtaining second cooling water flows of the generator set corresponding to different load intervals under each second target air temperature based on a cooling water flow prediction model, wherein the cooling water flow prediction model is constructed based on the cooling water flows and the air temperatures in the historical operation data, and the second target air temperatures are air temperatures except the first target air temperatures;
the instruction generation module is used for determining an adjusting instruction corresponding to a target air temperature and a target load interval according to the first cooling water flow, the second cooling water flow and a hydraulic performance curve of the water supply pump.
In a third aspect, an embodiment of the present application provides a computer device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor executes the computer program to implement a method for adjusting a water supply pump of a technical water supply system according to the first aspect.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements a method for adjusting a water supply pump of a technical water supply system as described in the first aspect above.
Compared with the related art, the adjusting method for the water supply pump of the technical water supply system provided by the embodiment of the application obtains the characteristic data of each target air temperature from the historical operation data of the generator set, obtains the first cooling water flow of the generator set corresponding to different load intervals according to the characteristic data, obtains the second cooling water flow of the generator set corresponding to different load intervals under each non-target air temperature based on the cooling water flow estimation model, and determines the adjusting instruction corresponding to the target air temperature and the target load interval according to the hydraulic performance curves of the first cooling water flow, the second cooling water flow and the water supply pump. The problem of the security low in the water supply system operation process is solved, through the predictive model that actual measurement data and actual measurement data obtained confirm required cooling water flow under the different operating conditions to according to the actual operating condition adjustment unit optimum operating frequency and the power of unit, prevent unit operating frequency and power unreasonable under the partial operating condition, lead to the cooling of unit or lubricating ability inadequately, equipment local overheat can't safe operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a schematic view of an application environment of a method of adjusting a water supply pump of a technical water supply system according to an embodiment of the present application;
FIG. 2 is a flow chart of a method of adjusting a water supply pump of a technical water supply system in accordance with an embodiment of the present application;
FIG. 3 is a flow chart of a feature data acquisition method according to an embodiment of the present application;
FIG. 4 is a block diagram of a water supply system according to an embodiment of the present application;
FIG. 5 is a flow chart of a method of adjusting a water supply pump of a technical water supply system according to an embodiment of the present application;
FIG. 6 is a block diagram of a regulation system for a water supply pump of a technical water supply system according to an embodiment of the present application;
fig. 7 is a schematic diagram of an internal structure of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described and illustrated below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments provided herein, are intended to be within the scope of the present application.
It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to apply the present application to other similar situations according to these drawings without inventive effort. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the embodiments described herein can be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar terms herein do not denote a limitation of quantity, but rather denote the singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein refers to two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, for example, ports a and/or B "may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.
Fig. 1 is a schematic view of an application environment of a method for adjusting a water supply pump of a technical water supply system according to an embodiment of the present application, and the method for adjusting a water supply pump of a technical water supply system provided in the present application may be applied to the application environment shown in fig. 1. As shown in fig. 1, a server 101 communicates with a genset 102 via a network. The server 101 obtains characteristic data from historical operation data of the generator set 102, obtains first cooling water flow corresponding to each load interval of the generator set 102 according to the characteristic data, obtains second cooling water flow corresponding to different load intervals of the generator set 102 under each second target air temperature based on a cooling water flow estimation model, and determines adjustment instructions corresponding to the target air temperature and the target load interval according to the hydraulic performance curves of the first cooling water flow, the second cooling water flow and the water supply pump.
The embodiment provides a method for adjusting a water supply pump of a technical water supply system. Fig. 2 is a flowchart of a method of adjusting a water supply pump of a technical water supply system according to an embodiment of the present application, as shown in fig. 2, the flowchart including the steps of:
step S201, respectively acquiring characteristic data representing the running state of the generator set under each first target air temperature from historical running data of the generator set.
In this embodiment, the generator set is a generator set of a technical water supply system.
Historical operating data includes, but is not limited to, unit operating start time, end time, duration, load (active), air temperature, reservoir water temperature, upper guide bearing shoe temperature or oil temperature, lower guide bearing shoe temperature or oil temperature, water guide bearing shoe temperature or oil temperature and air cooler hot and cold air temperature, motor start-stop power and frequency, and flow valve opening (upper guide bearing, lower guide bearing, water guide bearing and air cooler bypass installation).
In some embodiments, step S201 specifically includes:
step S2011, stable operation data are screened out from historical operation data according to preset screening conditions, wherein the preset screening conditions comprise: the power of the water supply pump is larger than zero, the active load of the generator set is larger than zero, the stable running time is larger than a preset time threshold value, and the watt temperature change value is smaller than a preset temperature rise threshold value.
Preprocessing the historical operation data to remove abnormal data, and obtaining data under stable operation conditions. The stable operation data is screened out through the power of the water supply pump, the active load of the generator set, the continuous operation time of the generator set under the current active condition, the load fluctuation of the generator set and the temperature change of each guide bearing of the water supply pump.
The calculation formula of the load fluctuation of the unit is as follows:
equation one:
wherein,is the average value of the active power of the unit in a certain period of time, P 1max Is the maximum value of the active power of the unit in the period, and delta P is the load fluctuation of the unit in the period.
For example, the screening conditions for steady operation data are: the power of the water supply pump is larger than zero, the active load of the generator set is larger than zero, the continuous running time of the generator set under the current active condition is larger than 30 minutes, the load fluctuation of the generator set is smaller than 3% of the current active load, and the temperature change of each guide bearing of the water supply pump is smaller than 1K.
And forming a new sequence from the screened data, carrying out consistency test on historical temperature data of a plurality of bearing shoes of the same bearing component, and after removing abnormal test data, aggregating each piece of sequence data, and taking a maximum temperature value as temperature characteristic data of the bearing component, wherein the bearing component of the generator set comprises an upper guide bearing, a lower guide bearing, a water guide bearing and an air cooler.
The abnormal data includes: bearing shoe data with a temperature dispersion greater than a preset dispersion threshold, or bearing shoe data with abnormal temperature fluctuations over a certain period of time (e.g., a trend of temperature change over a certain period of time is inconsistent with other periods of time).
Fig. 3 is a flowchart of a feature data acquisition method according to an embodiment of the present application, as shown in fig. 3, the flowchart including the steps of:
step S301, obtaining historical operation data of a generator set.
Step S302, judging the water supply pump power P 2 Whether or not is greater than zero, the active load P of the generator set 1 Whether or not is greater than zero, the generator set continuously operates under the current active powerWhether the time is greater than 30 minutes.
And step S303, if so, judging whether the load fluctuation of the unit is less than 3% of the current active load, and whether the temperature change of each guide bearing of the water supply pump is less than 1K.
And step S304, if yes, the data under the stable operation condition is obtained.
And S304, carrying out consistency test on the historical temperature data of the plurality of bearing bushes of the same bearing component, and eliminating abnormal test data.
And S304, after eliminating abnormal data, performing data aggregation on stable operation condition data, and taking the maximum watt temperature value as the temperature characteristic data of the component.
Step S2012, obtaining feature data corresponding to the first target air temperature from the steady operation data.
Typical air temperatures in respective seasons are selected as the first target air temperature, for example, the highest average air temperature in summer, the lowest average air temperature in winter, the average air temperatures in spring and autumn.
Step S202, according to the characteristic data, respectively obtaining first cooling water flow corresponding to each load section of the generator set.
Dividing rated active power of the unit into a plurality of load sections according to preset intervals, such as 20% P r The active power of the machine set is divided into 0 to 20 percent of P r 、20％P r ～40％P r 、40％P r ～60％P r 、60％P r ～80％P r 、80％P r ～100％P r Five load zones.
And respectively obtaining cooling water flow corresponding to each first target gas temperature and load interval according to the screened data. Table 1 is a cooling water flow rate estimation table according to an embodiment of the present application, as shown in Table 1, the abscissa is a first target air temperature, the ordinate is a load zone, Q ij The cooling water flow corresponding to the ith air temperature value and the jth load zone.
TABLE 1
In some embodiments, step S202 specifically includes:
step S401, obtaining the average value of the bearing temperature of the water supply pump corresponding to each load section under each first target air temperature according to the characteristic data.
The bearing temperature of the water supply pump can be the bearing bush temperature or the bearing oil temperature.
Step S402, a temperature difference value between the average bearing temperature and a preset temperature threshold is obtained.
Step S403, obtaining first cooling water flow needed by different load regions at the first target air temperature according to the temperature difference value and the characteristic data.
In some embodiments, step S403 specifically includes:
step S4031, under the condition that the temperature difference value is within the preset difference value range, acquiring first water flow data of each branch of the generator set from the characteristic data, and determining first cooling water flow based on the pipeline hydraulic loss model according to the first water flow data, wherein the pipeline hydraulic loss model represents the relation between the total pipeline loss and the cooling water flow of the technical water supply system.
According to the pipeline arrangement condition of the unit technology water supply system and related drawings, calculating the pipeline along-distance loss and the local flow loss of each branch (an upper guide bearing, a lower guide bearing, a water guide bearing and an air cooler) of the technology water supply system, and obtaining the relation between the total loss delta h of the pipeline and the cooling water flow Q, namely a pipeline hydraulic loss model:
Δh＝Δh upper guide +Δh Down guide +Δh Water guide +Δh Air cooling +Δh Manifold pipe
＝ξ Upper guide Q Upper guide +ξ Down guide Q Down guide +ξ Water guide Q Water guide +ξ Air cooling Q Air cooling +ξ Manifold pipe Q Manifold pipe
Wherein Δh is the total loss of the pipeline, namely the total working lift of the water supply pump, and Δh Upper guide For the pipe loss of the upper guide bearing, Δh Down guide For the pipe loss of the down-guide bearing Δh Water guide For the pipe loss of the water-guiding bearing, Δh Air cooling For the duct loss of the air cooler Δh Manifold pipe For losses on mains, Q Upper guide The flow rate of cooling water required by the upper guide bearing is Q Down guide For the flow of cooling water required by the down-guide bearing, Q Water guide The flow rate of the cooling water required by the water guide bearing is Q Air cooling Cooling water flow required for air cooler, Q Manifold pipe For the flow of cooling water needed on the main pipeline, xi Upper guide Is the coefficient of the upper guide bearing, xi Down guide For the down-guide bearing coefficient, ζ Water guide Is the coefficient of the water guide bearing, xi Air cooling Is the air cooler coefficient, ζ Manifold pipe Is the total pipeline coefficient.
If the difference value between the average value of the temperature of a certain bearing component and the preset temperature threshold value is in the preset difference value range (for example, 5K-10K) under the current working condition, the opening of the flow regulating valve of the component is kept unchanged, and the current reservoir water temperature, the unit power, the technical water supply pump power and frequency, the temperature of each component and the opening of the flow regulating valve are recorded.
And obtaining the flow of the corresponding branch of each bearing component under the current working condition according to the recorded operation data of each component, and calculating the total flow required by the system, namely the first cooling water flow, based on the hydraulic loss model of the technical water supply system pipeline.
Step S4032, if the temperature difference is not within the preset difference range, sending an opening adjustment command to the flow adjustment valve to instruct the flow adjustment valve to adjust the temperature difference to the preset difference range by adjusting the opening of the valve,
And under the condition that the bearing temperature fluctuation is smaller than a preset fluctuation threshold value, acquiring second water flow data of each branch of the current generator set, and determining the first cooling water flow according to the second water flow data based on the pipeline hydraulic loss model.
For example, the preset difference range is 5K to 10K.
If the difference delta T between the average temperature value of a certain bearing component and a preset temperature threshold value under the current working condition is less than 5K, the opening of the component flow regulating valve is regulated and increased by 10%, the running time of a standby group reaches 30min, and the watt temperature fluctuation delta T of each component is obtained. If delta t is more than 1K, continuing to wait for temperature stabilization; if delta T is less than or equal to 1K, calculating the temperature change delta T of each part Tile Calculating the difference delta T between the average temperature value of the component and the standard threshold value, if delta T is smaller than 5K, continuing to increase the opening of the flow regulating valve until the difference between the average temperature value of the component and the standard threshold value meets the condition that delta T is smaller than or equal to 5K and smaller than or equal to 10K; if deltat is less than or equal to 1K, and the difference value between the average temperature value of the component and the standard threshold value is less than or equal to 5K and less than or equal to 10K, the current opening of the flow regulating valve is kept, and meanwhile, related operation data are recorded.
If the difference delta T between the average value of the temperature of a certain bearing component and the preset temperature threshold value is more than 1OK under the current working condition, the opening of the component flow regulating valve is reduced by 10%, and after the tile temperature is stable, the component tile Wen Wensheng delta T is calculated Tile And a difference deltat between the average component temperature and a preset temperature threshold. If delta T is more than 10K, continuously reducing the opening of the flow regulating valve by 10%, and repeating the current step until delta T is more than or equal to 5K and less than or equal to 10K; if the delta T is not less than 5K and not more than 10K, the current opening of the flow regulating valve is kept, and meanwhile, related operation data are recorded.
And obtaining the flow of the corresponding branch of each bearing component under the current working condition according to the recorded operation data of each component, and calculating the total flow required by the system, namely the first cooling water flow, based on the hydraulic loss model of the technical water supply system pipeline.
In some of these embodiments, step S202 further includes:
in step S501, when missing data exists in the feature data, an operation instruction is generated according to the first target air temperature and the load zone corresponding to the missing data.
Step S502, an operation instruction is sent to a generator set to obtain supplementary operation data of the generator set in a first target gas temperature and load interval corresponding to the missing data.
Step S503, obtaining a first cooling water flow rate under a first target air temperature and load interval corresponding to the missing data according to the supplementary operation data.
If characteristic sun machineGroup operation P 1 If the whole load section is not covered (if the data of the unit running in the 60-80% Pr load section under a certain first target air temperature is lacking), running tests are needed to be carried out on the relevant load section, and the lacking data is supplemented.
The feature data and the supplementary operation data in this embodiment are measured data. Through the measured data, the relation between the unit active power and the required cooling water flow at each first target air temperature is obtained, and meanwhile, the relation between each load segment tile Wen Wensheng (the temperature change of the water supply pump bearing) of the unit and the cooling water flow at each first target air temperature is also obtained.
Step S203, second cooling water flows of the generator set corresponding to different load intervals are respectively obtained under second target air temperatures based on cooling water flow prediction models, wherein the cooling water flow prediction models are constructed based on cooling water flows and air temperatures in historical operation data, and the second target air temperatures are air temperatures except the first target air temperatures.
In some of these embodiments, step S203 is preceded by:
step S601, arranging the historical operation data in an inverse order according to the air temperature values, and acquiring the historical operation data at the third target air temperature according to the arrangement result.
And acquiring historical stable working condition operation data from the historical data, arranging the historical stable working condition operation data according to the air temperature, and determining a third target air temperature according to an arrangement result, wherein the third target air temperature is a temperature with a certain representativeness, and comprises a hottest temperature, a hotter temperature, a proper temperature, a colder temperature and a coldest temperature.
For example, the historical stable working condition operation data are arranged in the reverse order of the air temperature value to obtain N pieces of historical data, and the air temperature t corresponding to the 1 st, N/2 nd and N th pieces of data is obtained 1 、t N/2 、t N Will t 1 、t N/2 、/>t N As a third target air temperature.
And acquiring operation data corresponding to a third target air temperature from the historical stable working condition operation data, and acquiring operation data corresponding to an air temperature of which the temperature difference is smaller than 1K if the operation data does not exist in a certain third target air temperature.
Step S602, according to the historical operation data of the third target air temperature, the tile temperature change data and the cooling water flow corresponding to different load intervals under the third target air temperature are obtained.
And obtaining the relation between the unit active power and the required cooling water flow at the third target air temperature and the relation between each load segment tile Wen Wensheng of the unit and the cooling water flow according to the operation data corresponding to the third target air temperature. The specific method is the same as the method for obtaining the relation between the unit active power and the required cooling water flow at the first target air temperature and the relation between each load segment tile Wen Wensheng of the unit and the cooling water flow in the step S202.
Step S603, constructing a cooling water flow estimation model according to the tile temperature change data and the cooling water flow corresponding to different load regions at the third target air temperature based on a stepwise regression method.
Obtaining the tile Wen Wensheng delta T according to the relation between the active power of the unit and the required cooling water flow at the three target air temperatures and the relation between each load segment tile Wen Wensheng of the unit and the cooling water flow by using a stepwise regression method Tile And air temperature T Air temperature Load P of unit 1 And a regression equation of the cooling water flow Q, namely a cooling water flow estimation model:
ΔT tile ＝b 0 +b 1 T Air temperature +b 2 P 1 +b 3 Q
And determining the cooling water flow corresponding to the generator set in different load intervals, namely the second cooling water flow, under the non-first target air temperature based on the cooling water flow estimation model.
Step S204, determining an adjusting instruction corresponding to the target air temperature and the target load interval according to the first cooling water flow, the second cooling water flow and the hydraulic performance curve of the water supply pump.
The hydraulic performance curve of the water supply pump is a curve representing the performance characteristics of the water supply pump under different flow and lift conditions, and is usually obtained through experimental tests or calculated according to delivery parameters of the water supply pump.
In some embodiments, the step S204 specifically includes:
step S2041, determining a set target rotating speed corresponding to the target air temperature and the target load interval according to the first cooling water flow, the second cooling water flow and the hydraulic performance curve.
Step S2042, based on the unit target rotating speed, obtaining an adjusting instruction corresponding to the target air temperature and the target load interval, wherein the adjusting instruction comprises a frequency adjusting instruction and a power adjusting instruction.
The first cooling water flow is required cooling water flow of the unit under each load interval under typical air temperature obtained based on measured data, and the second cooling water flow is required cooling water flow of the unit under each load interval under atypical air temperature estimated based on a cooling water flow estimation model. According to the first cooling water flow and the second cooling water flow, the corresponding relation between the unit active power and the required cooling water flow at all temperatures can be obtained. In the actual running process of the unit, the required cooling water flow can be accurately determined according to the current air temperature and the unit active power.
Fig. 4 is a block diagram of a water supply system including a control system and a water supply pump including an upper guide bearing, a lower guide bearing, a water guide bearing, and an air cooler, as shown in fig. 4, according to an embodiment of the present application.
The control system obtains the association relation between the cooling water flow and the air temperature and the unit load according to the air temperature, the reservoir water temperature, the unit load, the upper guide bearing bush temperature, the lower guide bearing bush temperature, the water guide bearing bush temperature, the air cooler cold air temperature and the air cooler hot air temperature, distributes the cooling water flow required by each branch of the water supply pump according to the association relation, and obtains the optimal lift, power and frequency of the water supply pump under the current working condition through the performance curve of the water supply pump.
According to the steps, a first cooling water flow is obtained according to the actually measured operation data, a second cooling water flow is obtained according to a cooling water flow estimation model, based on a hydraulic performance curve of a water supply pump, an adjusting instruction corresponding to a target air temperature and a target load interval is determined according to the first cooling water flow and the second cooling water flow, and an energy efficiency optimization control strategy is obtained. The problem of the water supply system operation in-process security low is solved, through the predictive model that actual measurement data and actual measurement data obtained confirm the regulation strategy under the different operating conditions, unit operating frequency and power are unreasonable under the partial operating condition is prevented, lead to the unit cooling or lubricating ability insufficient, equipment local overheating can't safe operation. Meanwhile, the unit is regulated based on an energy efficiency optimization control strategy obtained according to engineering practical experience, and the running efficiency of the unit can be effectively improved.
Fig. 5 is a flowchart of a method for adjusting a water supply pump of a water supply system according to an embodiment of the present application, as shown in fig. 5, the flowchart includes the following steps:
step S701, acquiring historical operation parameters of the hydro-generator set, where the historical operation parameters include: air temperature, reservoir water temperature, unit load, upper guide bearing bush temperature, lower guide bearing bush temperature, water guide bearing bush temperature, air cooler cold air temperature, air cooler hot air temperature, water pump motor power and frequency and flow regulating valve opening.
Step S702, analyzing the historical data to obtain characteristic data.
And step 703, obtaining the association relation between the unit operation parameters and the cooling water flow of each guide bearing through the characteristic data, the pre-established cooling water flow estimation model and the pipeline hydraulic loss model.
And step 704, determining the cooling water flow required by the current working condition according to the association relation, and carrying out variable frequency adjustment on the unit according to the cooling water flow required by the current working condition.
It should be noted that the steps illustrated in the above-described flow or flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flow diagrams, in some cases, the steps illustrated or described may be performed in an order other than that illustrated herein.
The embodiment also provides an adjusting system of a water supply pump of a technical water supply system, and the adjusting system is used for realizing the above embodiment and the preferred embodiment, and the description is omitted. As used below, the terms "module," "unit," "sub-unit," and the like may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
Fig. 6 is a block diagram of a system for regulating a water supply pump of a technical water supply system according to an embodiment of the present application, as shown in fig. 6, comprising: a data acquisition module 801, a first analysis module 802, a second analysis module 803, and an instruction generation module 804.
The data acquisition module 801 is configured to respectively acquire, from historical operation data of the generator set, feature data that characterizes an operation state of the generator set at each first target air temperature.
The first analysis module 802 is configured to obtain, according to the feature data, a first cooling water flow rate of the generator set corresponding to each load interval.
The second analysis module 803 is configured to obtain, based on a cooling water flow prediction model, second cooling water flows of the generator set corresponding to different load intervals at second target air temperatures, where the cooling water flow prediction model is constructed based on cooling water flows and air temperatures in historical operation data, and the second target air temperatures are air temperatures other than the first target air temperatures.
The instruction generation module 804 is configured to determine an adjustment instruction corresponding to the target air temperature and the target load interval according to the first cooling water flow, the second cooling water flow, and the hydraulic performance curve of the water supply pump.
In some of these embodiments, the first analysis module 802 includes: the system comprises a temperature acquisition module, a temperature difference determination module and a flow determination module.
The temperature acquisition module is used for acquiring the average value of the bearing temperature of the water supply pump corresponding to each load interval under each first target air temperature according to the characteristic data;
the temperature difference determining module is used for obtaining a temperature difference value between the average bearing temperature value and a preset temperature threshold value;
and the flow determining module is used for obtaining first cooling water flows required by different load regions at the first target air temperature according to the temperature difference value and the characteristic data.
In some of these embodiments, the flow determination module comprises: a first flow determination module and a second flow determination module.
The first flow determining module is used for acquiring first flow data of each branch of the generator set from the characteristic data under the condition that the temperature difference value is in a preset difference value range, determining first cooling water flow according to the first flow data based on the pipeline hydraulic loss model, wherein the pipeline hydraulic loss model represents the relation between the total pipeline loss of the generator set and the flow data.
The second flow determining module is used for sending an opening adjusting instruction to the flow adjusting valve to instruct the flow adjusting valve to adjust the temperature difference to a preset difference range by adjusting the opening of the valve under the condition that the temperature difference is not in the preset difference range,
And under the condition that the bearing temperature fluctuation is smaller than a preset fluctuation threshold value, acquiring second water flow data of each branch of the current generator set, and determining the first cooling water flow according to the second water flow data based on the pipeline hydraulic loss model.
In some of these embodiments, the first analysis module 802 further comprises: the system comprises a supplementary instruction generation module, a supplementary data acquisition module and a supplementary flow determination module.
The supplementary instruction generation module is used for generating an operation instruction according to a first target air temperature and a load interval corresponding to the missing data when the missing data exist in the characteristic data.
The supplementary data acquisition module is used for sending an operation instruction to the generator set so as to acquire supplementary operation data of the generator set in a first target gas temperature and load interval corresponding to the missing data.
And the supplementary flow determining module is used for obtaining the first cooling water flow under the first target gas temperature and load interval corresponding to the missing data according to the supplementary operation data.
In some of these embodiments, the instruction generation module 804 includes: the rotating speed determining module and the adjusting instruction generating module.
The rotating speed determining module is used for determining a set target rotating speed corresponding to a target air temperature and a target load interval according to the first cooling water flow, the second cooling water flow and the hydraulic performance curve;
And the adjusting instruction generation module is used for obtaining an adjusting instruction corresponding to the target air temperature and the target load interval based on the target rotating speed of the unit, wherein the adjusting instruction comprises a frequency adjusting instruction and a power adjusting instruction.
In some of these embodiments, the system further comprises: and a model building module.
The model construction module is used for arranging the historical operation data in reverse order according to the air temperature value, acquiring the historical operation data under the third target air temperature according to the arrangement result, acquiring the tile temperature change data and the cooling water flow corresponding to different load intervals under the third target air temperature according to the historical operation data of the third target air temperature,
and constructing a cooling water flow estimation model according to the tile temperature change data and the cooling water flow corresponding to different load regions at the third target air temperature based on a stepwise regression method.
In some of these embodiments, the data acquisition module 801 includes: the data screening module and the data determining module.
The data screening module is used for screening stable operation data from historical operation data according to preset screening conditions, wherein the preset screening conditions comprise: the power of the water supply pump is larger than zero, the active load of the generator set is larger than zero, the stable running time is larger than a preset time threshold value, and the watt temperature change value is smaller than a preset temperature rise threshold value.
And the data determining module is used for obtaining the characteristic data corresponding to the first target air temperature from the stable operation data.
The above-described respective modules may be functional modules or program modules, and may be implemented by software or hardware. For modules implemented in hardware, the various modules described above may be located in the same processor; or the above modules may be located in different processors in any combination.
The present embodiment also provides an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
Optionally, the electronic device may further include a transmission device and an input/output device, where the transmission device is connected to the processor, and the input/output device is connected to the processor.
Alternatively, in the present embodiment, the above-described processor may be configured to execute the following steps by a computer program:
s1, respectively acquiring characteristic data representing the running state of the generator set at each first target air temperature from historical running data of the generator set.
S2, respectively obtaining first cooling water flow corresponding to each load section of the generator set according to the characteristic data.
S3, respectively obtaining second cooling water flows of the generator set in different load intervals under each second target air temperature based on a cooling water flow estimation model, wherein the cooling water flow estimation model is constructed based on the cooling water flows and the air temperatures in the historical operation data, and the second target air temperatures are air temperatures except the first target air temperature.
S4, determining an adjusting instruction corresponding to the target air temperature and the target load interval according to the first cooling water flow, the second cooling water flow and the hydraulic performance curve of the water supply pump.
It should be noted that, specific examples in this embodiment may refer to examples described in the foregoing embodiments and alternative implementations, and this embodiment is not repeated herein.
In one embodiment, fig. 7 is a schematic diagram of an internal structure of an electronic device according to an embodiment of the present application, as shown in fig. 7, and an electronic device, which may be a server, may be provided, and an internal structure diagram thereof may be shown in fig. 7. The electronic device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic device includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the electronic device is for storing data. The network interface of the electronic device is used for communicating with an external terminal through a network connection. The computer program, when executed by a processor, implements a method of regulating a water supply pump of a technical water supply system.
It will be appreciated by those skilled in the art that the structure shown in fig. 7 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the electronic device to which the present application is applied, and that a particular electronic device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It should be understood by those skilled in the art that the technical features of the above-described embodiments may be combined in any manner, and for brevity, all of the possible combinations of the technical features of the above-described embodiments are not described, however, they should be considered as being within the scope of the description provided herein, as long as there is no contradiction between the combinations of the technical features.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A method of adjusting a water supply pump of a technical water supply system, the method comprising:
respectively acquiring characteristic data representing the running state of the generator set at each first target air temperature from historical running data of the generator set;
according to the characteristic data, respectively obtaining first cooling water flow corresponding to each load interval of the generator set;
Respectively obtaining second cooling water flows of the generator set corresponding to different load intervals under each second target air temperature based on a cooling water flow estimation model, wherein the cooling water flow estimation model is constructed based on the cooling water flows and the air temperatures in the historical operation data, and the second target air temperatures are air temperatures except the first target air temperatures;
and determining an adjusting instruction corresponding to the target air temperature and the target load interval according to the first cooling water flow, the second cooling water flow and the hydraulic performance curve of the water supply pump.
2. The method of claim 1, wherein obtaining the first cooling water flow rates of the generator set corresponding to different load intervals according to the characteristic data comprises:
obtaining the average value of the bearing temperatures of the water supply pumps corresponding to the load sections under the first target air temperatures according to the characteristic data;
acquiring a temperature difference value between the bearing temperature average value and a preset temperature threshold value;
and obtaining the first cooling water flow required by different load sections under the first target air temperature according to the temperature difference value and the characteristic data.
3. The method of claim 2, wherein deriving a first cooling water flow rate required for different load zones at the first target air temperature based on the temperature difference and the characteristic data comprises:
acquiring first water flow data of each branch of the generator set from the characteristic data under the condition that the temperature difference is in a preset difference range, and determining the first cooling water flow according to the first water flow data based on a pipeline hydraulic loss model, wherein the pipeline hydraulic loss model represents the relation between the total pipeline loss and the cooling water flow of the technical water supply system;
sending an opening adjusting instruction to the flow adjusting valve to instruct the flow adjusting valve to adjust the temperature difference to the preset difference range by adjusting the opening of the valve under the condition that the temperature difference is not in the preset difference range,
and under the condition that the bearing temperature fluctuation is smaller than a preset fluctuation threshold value, acquiring second water flow data of each branch of the current generator set, and determining the first cooling water flow according to the second water flow data based on a pipeline hydraulic loss model.
4. The method of claim 1, wherein obtaining the first cooling water flow rates of the generator set corresponding to different load intervals at the first target air temperature according to the characteristic data includes:
Generating an operation instruction according to a first target air temperature and a load interval corresponding to missing data when the missing data exists in the characteristic data;
sending the operation instruction to the generator set to obtain supplementary operation data of the generator set in a first target gas temperature and load interval corresponding to the missing data;
and obtaining a first cooling water flow rate under a first target air temperature and load interval corresponding to the missing data according to the supplementary operation data.
5. The method of claim 1, wherein determining an adjustment command corresponding to a target air temperature and a target load interval based on the first cooling water flow rate, the second cooling water flow rate, and a hydraulic performance curve of a water supply pump comprises:
determining a set target rotating speed corresponding to a target air temperature and a target load interval according to the first cooling water flow, the second cooling water flow and the hydraulic performance curve;
and obtaining an adjusting instruction corresponding to the target air temperature and the target load interval based on the target rotating speed of the unit, wherein the adjusting instruction comprises a frequency adjusting instruction and a power adjusting instruction.
6. The method of claim 1, wherein, at each second target air temperature based on the cooling water flow estimation model, the generator set is before the second cooling water flow corresponding to the different load intervals, the method further comprises:
Arranging the historical operation data in an inverse order according to the air temperature values, and acquiring the historical operation data under the third target air temperature according to the arrangement result;
obtaining tile temperature change data and cooling water flow corresponding to different load intervals under the third target air temperature according to the historical operation data of the third target air temperature;
based on a stepwise regression method, the cooling water flow estimation model is constructed according to the tile temperature change data and the cooling water flow corresponding to different load regions at the third target air temperature.
7. The method according to claim 1, wherein the obtaining, from the historical operating data of the generator set, feature data characterizing an operating state of the generator set at each first target air temperature includes:
screening stable operation data from the historical operation data according to preset screening conditions, wherein the preset screening conditions comprise: the power of the water supply pump is larger than zero, the active load of the generator set is larger than zero, the stable running time is larger than a preset time threshold value, and the watt temperature change value is smaller than a preset temperature rise threshold value;
and obtaining the characteristic data corresponding to the first target air temperature from the stable operation data.
8. A system for regulating a water supply pump of a technical water supply system, said system comprising: the system comprises a data acquisition module, a first analysis module, a second analysis module and an instruction generation module, wherein,
The data acquisition module is used for respectively acquiring characteristic data representing the running state of the generator set at each first target air temperature from the historical running data of the generator set;
the first analysis module is used for respectively obtaining first cooling water flow corresponding to each load interval of the generator set according to the characteristic data;
the second analysis module is used for respectively obtaining second cooling water flows of the generator set corresponding to different load intervals under each second target air temperature based on a cooling water flow prediction model, wherein the cooling water flow prediction model is constructed based on the cooling water flows and the air temperatures in the historical operation data, and the second target air temperatures are air temperatures except the first target air temperatures;
the instruction generation module is used for determining an adjusting instruction corresponding to a target air temperature and a target load interval according to the first cooling water flow, the second cooling water flow and a hydraulic performance curve of the water supply pump.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements a method for regulating a water supply pump of a technical water supply system according to any one of claims 1 to 7 when executing the computer program.
10. A storage medium having stored thereon a computer program, which when executed by a processor implements a method of regulating a service pump of a technical water supply system according to any one of claims 1 to 7.
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| CN117664622A (en) * | 2024-01-31 | 2024-03-08 | 浙江嘉源和达水务有限公司 | Automatic performance test method and device for water supply equipment and electronic equipment |
| CN117664622B (en) * | 2024-01-31 | 2024-04-16 | 浙江嘉源和达水务有限公司 | Automatic performance test method and device for water supply equipment and electronic equipment |
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