CN104199310B - Once-though cooling circulation tidal range affects the application of model - Google Patents
Once-though cooling circulation tidal range affects the application of model Download PDFInfo
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Abstract
The present invention relates to a kind of once-though cooling circulation tidal range and affect the application of model, by analyzing and processing tidal level and circulation performance data, set up circulation tidal range and affect model, apply this model, the circulation characteristic under object run mode lowest water level can be predicted, bonding apparatus security strategy, instruct equipment safety operation, the circulation tidal range simultaneously applying foundation affects model and is optimized previous cycle water running situation, can improve and optimize the accuracy calculated.
Description
Technical field
The present invention relates to once-though cooling circulation tidal range and affect the application of model.
Background technology
Existing circulation performance test scheme is under certain method of operation, directly measures the spy of circulation
Property data, such as inlet pressure, inlet temperature, outlet pressure, outlet temperature, system discharge and circulation power of motor,
It is fitted being calculated circulation proper property characteristic by data above.Circulation proper property characteristic combines
The equipment of circulation is run and is optimized by condenser performance family of curves and steam turbine vacuum Derivative characteristics, thus draws and work as
The optimized running mode of circulation under front unit load, recirculated water inflow temperature operating mode.Specifically Optimizing Flow such as Fig. 1 institute
Show.
As it has been described above, existing circulation performance test technology is the property being obtained circulation by measuring method
Energy characteristic, thus instruct circulation to run, there is no problem for the closed circle water system relatively stable for systematic parameter,
But it is the most inapplicable to once-though cooling circulation.Main cause is that once-though cooling circulation is by sea water tide
Nighttide characteristic affects, and tidal regime refers mainly to sea water tidal level factor in this article.Use the data that existing experimental technique measurement obtains
It is the intrinsic Performance Characteristics of circulation and the sea water tidal level factor coupling data on the impact of circulation characteristic, and extra large
The tidal level of water is a regular change procedure, and the result obtained the most at the trial can only represent under certain fixing tidal level
The characteristic of circulation, can not effectively represent the Performance Characteristics that circulation is intrinsic, cause the performance of circulation
Property calculation result is affected by tidal level factor and is deviateed actual value, does not considers this some effects factor, will have influence on final sending out
Electric power plant circulating water system safety operation and optimization operation result.
Summary of the invention
Present invention aims to use the generating plant circulation-water system of once-though cooling circulation, it is provided that
A kind of circulation tidal range affects model, it is possible to once-though cooling circulation is obtained previous cycle water systematic function
Characteristic improves, and makes safe operation and optimization operation result more accurate.
For achieving the above object, the technical scheme is that once-though cooling circulation tidal range affects model
Application, comprise the steps,
S1 sets up circulation tidal level affects model and circulation tidal range affects model: by long term test with go through
History data query mode, is obtained the operational factor of different tidal level circulations under certain method of operation, is obtained by numerical fitting
Obtaining the impact on circulation characteristic of the sea water tidal level, finally setting up circulation tidal level affects model, to circulation
Tidal level affects model and carries out difference processing and obtain circulation tidal range and affect model；
S2 obtains circulation proper property characteristic: obtained under each compound mode of circulation by actual tests
Tidal level and corresponding circulation characteristic, utilize the circulation tidal range described in S1 to affect the circulation that reality is measured by model
The impact of water system performance data tidal level carries out decoupling, obtains the circulation characteristic under reference mean tide tlevel, in this, as
The proper property characteristic of circulation；
S3 is by different circulation operating-duty tests, it is thus achieved that corresponding condenser vacuum and circulating water flow
Data, and utilize circulation tidal range to affect model by corresponding circulating water flow data correction to reference under mean tide tlevel
Data, then set up condenser vacuum circulating water flow characteristic mathematical model by matching；
S4, under the conditions of same load and circulating water temperature, obtains the heat rate data of unit under different vacuum condition, adopts
Vacuum micro-gain of heat consumption characteristic mathematical model is set up with numerical fitting；
The circulation tidal range that S5 application is set up affects model and refers to the operation of once-though cooling circulation
Lead.Specifically include following two aspect, apply one: utilize the circulation tidal range set up to affect model, obtain lowest water level
Lower circulation operational factor, instructs equipment safety operation.In embodiments of the present invention, current sea water tidal level and sea are obtained
The characteristic of water direct cooling circulation, obtains the sea water lowest water level in this tidal period by historical data analysis,
Utilize circulation tidal range to affect model and calculate this cycle internal object method of operation circulation pressure under lowest water level
Power, it may be judged whether meet circulation safe operation requirement, if being unsatisfactory for, judging that object run mode is dangerous, switching to
Meet the method for operation of safe operation requirement.Application two: combine circulation tidal range affect model, circulation intrinsic
Performance Characteristics, condenser vacuum circulating water flow characteristic mathematical model and vacuum micro-gain of heat consumption characteristic mathematical model, to working as
Front circulation ruuning situation is optimized.In embodiments of the present invention, current once-though cooling circulation is obtained
Sea water tidal level, utilize circulation proper property characteristic to obtain the circulating water flow of object run mode and circulation
Wasted work, utilizes circulation tidal range to affect the circulating water flow under the object run mode that model will obtain and circulation
Wasted work is adapted to the circulating water flow under current tidal level and circulation wasted work, utilizes condenser vacuum circulating water flow special
Property data model obtain the vacuum under object run mode, utilize vacuum micro-gain of heat consumption characteristic mathematical model to obtain object run
By the heat consumption rate change under the most current heat consumption rate and object run mode, the heat consumption rate of unit under mode, judges that target is transported
Line mode is the most economical, thus the optimization realizing once-though cooling circulation runs, its Optimizing Flow figure such as Fig. 2 institute
Show.
In embodiments of the present invention, the characteristic of circulation described in S1 includes circulation pressure, flow and wasted work.
In embodiments of the present invention, set up circulation tidal level described in S1 and affect model formula (1) ~ formula (3) table
Show；
Tidal level to system main-piping pressure such as formula (1) Suo Shi,
(1)
Tidal level on the impact of flow as shown in Equation (2),
(2)
Tidal level on the impact of wasted work as shown in Equation (3),
(3)
It is recirculated water main-piping pressure, units MPa；It is tidal level, unit m；It is circulation total flow, unit
t/h；It is the total wasted work of circulation, unit kW.
In embodiments of the present invention, set up circulation tidal range described in S1 and affect model formula (4) ~ formula (6) table
Show；
Tidal range to system main-piping pressure as shown in Equation (4),
(4)
Tidal range on the impact of flow as shown in Equation (5),
(5)
Tidal range on the impact of system wasted work as shown in Equation (6) ,+
(6)
It is main-piping pressure change, units MPa；It is tidal range, unit m；It is total flow change, unit t/h；It is the change of circulation total wasted work, unit kW.
Compared to prior art, the method have the advantages that
1, compared with prior art, this motion is affected by sea water tidal level factor for once-though cooling circulation
Feature, setting up circulation tidal range affects model, in the circulation performance data that reality measurement can be obtained tidal level because of
Element impact is decoupling, obtains the proper property characteristic with reference to the circulation under mean tide tlevel.
2, utilize circulation tidal range to affect model, the parameter of circulation under lowest water level can be predicted, in conjunction with
Equipment safety operation limits, and can instruct circulation equipment safety operation.
3, combine circulation tidal range and affect model, the circulation method of operation is optimized, improve and optimize meter
The accuracy calculated, it is achieved the target for energy-saving and emission-reduction in power plant.
Accompanying drawing explanation
Fig. 1 is existing circulation running optimizatin flow chart.
Fig. 2 is the circulation running optimizatin flow chart considering tidal level factor.
Fig. 3 is tidal level and recirculated water main-piping pressure variation relation figure.
Fig. 4 is tidal level correspondence circulating water flow variation relation figure.
Fig. 5 is tidal level and circulation wasted work variation relation figure.
Detailed description of the invention
Below in conjunction with the accompanying drawings with the specific embodiment of the present invention, technical scheme is specifically described.
Once-though cooling circulation tidal range affects the application of model, comprises the steps,
S1 sets up circulation tidal level affects model and circulation tidal range affects model: by long term test with go through
History data query mode, is obtained the operational factor of different tidal level circulations under certain method of operation, is obtained by numerical fitting
Obtaining the impact on circulation characteristic of the sea water tidal level, finally setting up circulation tidal level affects model, to circulation
Tidal level affects model and carries out difference processing and obtain circulation tidal range and affect model；
S2 obtains circulation proper property characteristic: obtained under each compound mode of circulation by actual tests
Tidal level and corresponding circulation characteristic, utilize the circulation tidal range described in S1 to affect the circulation that reality is measured by model
The impact of water system performance data tidal level carries out decoupling, obtains the circulation characteristic under reference mean tide tlevel, in this, as
The proper property characteristic of circulation；
S3 is by different circulation operating-duty tests, it is thus achieved that corresponding condenser vacuum and circulating water flow
Data, and utilize circulation tidal range to affect model by corresponding circulating water flow data correction to reference under mean tide tlevel
Data, then set up condenser vacuum circulating water flow characteristic mathematical model by matching；
S4, under the conditions of same load and circulating water temperature, obtains the heat rate data of unit under different vacuum condition, adopts
Vacuum micro-gain of heat consumption characteristic mathematical model is set up with numerical fitting；
The circulation tidal range that S5 application is set up affects model and refers to the operation of once-though cooling circulation
Lead.Specifically include following two aspect, apply one: utilize the circulation tidal range set up to affect model, obtain lowest water level
Lower circulation operational factor, instructs equipment safety operation.In embodiments of the present invention, current sea water tidal level and sea are obtained
The characteristic of water direct cooling circulation, obtains the sea water lowest water level in this tidal period by historical data analysis,
Utilize circulation tidal range to affect model and calculate this cycle internal object method of operation circulation pressure under lowest water level
Power, it may be judged whether meet circulation safe operation requirement, if being unsatisfactory for, judging that object run mode is dangerous, switching to
Meet the method for operation of safe operation requirement.Application two: combine circulation tidal range affect model, circulation intrinsic
Performance Characteristics, condenser vacuum circulating water flow characteristic mathematical model and vacuum micro-gain of heat consumption characteristic mathematical model, to working as
Front circulation ruuning situation is optimized.In embodiments of the present invention, current once-though cooling circulation is obtained
Sea water tidal level, utilize circulation proper property characteristic to obtain the circulating water flow of object run mode and circulation
Wasted work, utilizes circulation tidal range to affect the circulating water flow under the object run mode that model will obtain and circulation
Wasted work is adapted to the circulating water flow under current tidal level and circulation wasted work, utilizes condenser vacuum circulating water flow special
Property data model obtain the vacuum under object run mode, utilize vacuum micro-gain of heat consumption characteristic mathematical model to obtain object run
By the heat consumption rate change under the most current heat consumption rate and object run mode, the heat consumption rate of unit under mode, judges that target is transported
Line mode is the most economical, thus the optimization realizing once-though cooling circulation runs, its Optimizing Flow figure such as Fig. 2 institute
Show.
The characteristic of circulation described in S1 includes circulation pressure, flow and wasted work.
Below as a example by a thermal power plant 600 MW unit circulation with tidal level properties relation result of the test, tide is described
Position change and circulation characterisitic parameter relation, and apply the circulation tidal range set up to affect model to circulation
Operation is instructed.
By research technique and history data collection mode, obtain the tidal level in the identical time, circulation mother's pipe pressure
Power, flow and wasted work, obtain the characteristic pass of actual tidal level and circulation pressure, flow and wasted work parameter by numerical fitting
It is that curve is as shown in Fig. 3,4,5.
Matching can be obtained circulation tidal level and affect model by circulation performance diagram under the fixing method of operation,
As shown in formula (1), formula (2) and formula (3):
Tidal level to system main-piping pressure as shown in Equation (1),
(1)
Tidal level on the impact of flow as shown in Equation (2),
(2)
Tidal level on the impact of system wasted work as shown in Equation (3),
(3)
In formula:It is recirculated water main-piping pressure, units MPa；It is tidal level, unit m；It is circulation total flow,
Unit t/h；It is the total wasted work of circulation, unit kW.
Formula (1), formula (2) and formula (3) are carried out difference processing, and available circulation tidal range affects model,
Represent with formula (4), formula (5) and formula (6):
Tidal range to system main-piping pressure as shown in Equation (4),
(4)
Tidal range on the impact of flow as shown in Equation (5),
(5)
Tidal range on the impact of system wasted work as shown in Equation (6),
(6)
In formula:It is main-piping pressure change, units MPa；It is tidal range, unit m；It is total flow change, unit
t/h；It is the change of circulation total wasted work, unit kW.
Obtain circulation by actual tests to make moist the Performance Characteristics of position influence, utilize circulation tidal range to affect
Model (i.e. tidal range affects formula (4) ~ (6) to circulation Performance Characteristics), isolates circulation proper property characteristic
Mathematical model, circulation proper property characteristic is with system performance characteristics during mean tide tlevel as reference standard.Such as, transport at a
Under line mode, test obtains sea water tidal level and isUnder, the current circulating water flow of circulation is, can by formula (6)
By tidal levelUnder circulation flow correction to reference to the circulating water flow under mean tide tlevel be；In the b method of operation
Under, test obtains sea water tidal level and is, the current circulating water flow of circulation is, can be by tidal level by formula (6)Under circulation flow correction to reference to the circulating water flow under mean tide tlevel be.If directly using result of the test,
Circulation is switched to the b method of operation from a method of operation, and changes in flow rate is；After tide station modified, recirculated water
System is switched to the b method of operation from a method of operation, and changes in flow rate is；WhenWithWhen deviation is bigger,
WithDeviation also will be bigger.In like manner during switchover operation mode, changed power is also affected by tidal level factor, if being therefore provided without
Tide station modified, the inherent character of the different circulation methods of operation will appear from deviation, when carrying out operation instruction, different operations
Flow and changed power under mode all will appear from deviation, thus affect operation result.
Obtain current sea water tidal level and the characteristic of once-though cooling circulation, obtained by historical data analysis
Sea water lowest water level in this tidal period, utilizes formula (4) to calculate this cycle internal object method of operation under lowest water level
Circulation pressure, it may be judged whether meet circulation safe operation requirement, if outlet pressure can not meet circulation
The minimum pressure that water system is run then needs the method for operation of recycling water formulation system, makes system meet pressure confines bar all the time
Part, system equipment safe operation.
By in different circulation operating-duty tests, it is thus achieved that corresponding condenser vacuum and circulating water flow number
According to, and utilize circulation tidal range to affect model by corresponding circulating water flow data correction to reference under mean tide tlevel
Data, then set up condenser vacuum circulating water flow characteristic mathematical model by matching.
Under the conditions of same load and circulating water temperature, obtain the heat rate data of unit under different vacuum condition, use
Numerical fitting sets up vacuum micro-gain of heat consumption characteristic mathematical model.
Model, the proper property characteristic of circulation, condenser vacuum circulation is affected in conjunction with circulation tidal level
Discharge characteristic mathematical model and vacuum micro-gain of heat consumption characteristic mathematical model, carry out excellent to previous cycle water running situation
Change.In an Optimal Example, obtain the sea water tidal level of current once-though cooling circulation, utilize circulation solid
There is Performance Characteristics to obtain circulating water flow and the circulation wasted work of targeted manner, utilize circulation tidal range to affect model
Circulating water flow under the object run mode of acquisition and consumption circulation merit are adapted to the circulating water flow under current tidal level
Amount and circulation wasted work, utilize condenser vacuum circulating water flow performance data model to obtain under object run mode
Vacuum, utilizes vacuum micro-gain of heat consumption characteristic mathematical model to obtain the heat consumption rate of unit under object run mode, works as by comparing
Heat consumption rate change under front heat consumption rate and object run mode judges that target is the most economical with property mode, thus it is straight to realize sea water
The optimization of stream cooling circulating water system runs.
More than use the new method step to once-though cooling circulation operation instruction for this case, all according to the present invention
Equalization change and the modification that claim is done, all should belong to the covering scope of the present invention.
Claims (6)
1. once-though cooling circulation tidal range affects the application process of model, it is characterised in that comprise the steps,
S1: setting up circulation tidal level affects model and circulation tidal range affects model: by long term test and history
Data query mode, is obtained the operational factor of different tidal level circulations under certain method of operation, is obtained by numerical fitting
The impact on circulation characteristic of the sea water tidal level, finally setting up circulation tidal level affects model, to circulation tide
Position influence model carries out difference processing and obtains circulation tidal range and affect model；
S2: obtain circulation proper property characteristic: obtain the tide under each compound mode of circulation by actual tests
Position and corresponding circulation characteristic, utilize the circulation tidal range described in S1 to affect the recirculated water that reality is measured by model
The impact of system performance data tidal level carries out decoupling, obtains with reference to the circulation characteristic under mean tide tlevel, in this, as following
The proper property characteristic of ring water system；
S3: by different circulation operating-duty tests, it is thus achieved that corresponding condenser vacuum and circulating water flow number
According to, and utilize circulation tidal range to affect model by corresponding circulating water flow data correction to reference under mean tide tlevel
Data, then set up condenser vacuum circulating water flow characteristic mathematical model by matching；
S4: under the conditions of same load and circulating water temperature, obtains the heat rate data of unit under different vacuum condition, uses number
Vacuum micro-gain of heat consumption characteristic mathematical model is set up in value matching；
S5: the circulation tidal range that application is set up affects model and instructs the operation of once-though cooling circulation,
Specifically include following two aspect, apply one: utilize the circulation tidal range set up to affect model, obtain following under lowest water level
Ring water system operational parameters, instructs equipment safety operation；Application two: combining circulation tidal range affects model, circulating water
The proper property characteristic of system, condenser vacuum circulating water flow characteristic mathematical model and vacuum micro-gain of heat consumption characteristic mathematical modulo
Type, is optimized previous cycle water running situation.
Once-though cooling circulation tidal range the most according to claim 1 affects the application process of model, its feature
Being, the characteristic of circulation described in S1 includes circulation pressure, flow and wasted work.
Once-though cooling circulation tidal range the most according to claim 1 affects the application process of model, its feature
Being, setting up circulation tidal level described in S1 affects model formula (1)～formula (3) expression；
Tidal level to system main-piping pressure such as formula (1) Suo Shi,
Pout=0.00934+0.00884hsl-0.0000134hsl 2 (1)
Tidal level is shown on the impact such as formula (2) of flow,
Tidal level is shown on the impact such as formula (3) of wasted work,
N=5430.8-14.88hsl (3)
PoutIt is recirculated water main-piping pressure, hslBeing tidal level, Q is circulation total flow, and N is the total wasted work of circulation.
Once-though cooling circulation tidal range the most according to claim 1 affects the application process of model, its feature
Being, setting up circulation tidal range described in S1 affects model formula (4)～formula (6) expression；
Tidal range to system main-piping pressure such as formula (4) Suo Shi,
ΔPout=0.00884 Δ hsl-0.0000268hslΔhsl (4)
Tidal range is shown on the impact such as formula (5) of flow,
Tidal range is shown on the impact such as formula (6) of system wasted work,
Δ N=-14.88 Δ hsl (6)
ΔPoutIt is main-piping pressure change, Δ hslBeing tidal range, Δ Q is total flow change, and Δ N is the change of circulation total wasted work.
Once-though cooling circulation tidal range the most according to claim 1 affects the application process of model, its feature
It is, described S5 applies one concretely comprise the following steps: obtain current sea water tidal level and once-though cooling circulation
Characteristic, obtains the sea water lowest water level in this tidal period by historical data analysis, utilizes circulation tidal range to affect
Model calculates this cycle internal object method of operation circulation pressure under lowest water level, it may be judged whether meet circulating water
System safe operation requirement, if being unsatisfactory for, judging that object run mode is dangerous, switching to the operation meeting safe operation requirement
Mode.
Once-though cooling circulation tidal range the most according to claim 1 affects the application process of model, its feature
It is, described S5 applies two concretely comprise the following steps: obtain the sea water tidal level of current once-though cooling circulation, utilize
Circulation proper property characteristic obtains circulating water flow and the circulation wasted work of object run mode, utilizes recirculated water
System tidal range affects model and the circulating water flow under the object run mode of acquisition and circulation wasted work is adapted to currently
Circulating water flow under tidal level and circulation wasted work, utilize condenser vacuum circulating water flow performance data model to obtain
Vacuum under object run mode, utilizes vacuum micro-gain of heat consumption characteristic mathematical model to obtain the heat of unit under object run mode
Consumption rate, judges object run mode whether warp by the heat consumption rate change under relatively more current heat consumption rate and object run mode
Ji, thus the optimization realizing once-though cooling circulation runs.
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| CN110514025A (en) * | 2018-11-21 | 2019-11-29 | 中国能源建设集团广东省电力设计研究院有限公司 | Once-through cooling water system, power plant system and direct cooling method |
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| CN103778478A (en) * | 2013-12-24 | 2014-05-07 | 国家电网公司 | Method for forecasting optimal operation mode of circulating water in combination with tidal characteristic of sea water |
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