CN107559212B - A kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method and system - Google Patents
A kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method and system Download PDFInfo
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Abstract
The present invention discloses a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method, it refers specifically to: after obtaining the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic model and the generated output of fired power generating unit, whether two respective circulations of constant speed water circulating pump of real-time judge are currently in steady state operating condition, when being in stable state, the respective current lift of two water circulating pumps and circulating water flow are calculated according to the pump characteristics model and pepeline characteristic model.The current constant speed recirculated water pump group efficiency of pump is calculated according to the power of motor of two constant speed water circulating pumps, current pump lift and previous cycle water flow.The above method, the case where being pumped for two constant speed recirculated water pump groups, establish the real-time judge mechanism of two water pump operation operating conditions, solves the prior art in monitoring process cannot distinguish between caused by systematic steady state and non-steady state state the calculating group efficiency of pump, the poor problem of accuracy rate under unsteady state condition.
Description
Technical field
The present invention relates to the technical fields of thermal power unit operation performance on-line monitoring, and in particular to a kind of fired power generating unit constant speed
Recirculated water pump group efficiency of pump on-line monitoring method and system.
Background technique
Water circulating pump is the important equipment of fired power generating unit cold end system, as the biggish subsidiary engine of power consumption in thermal power plant it
One, the electric energy of water circulating pump consumption accounts for about the 1%~1.5% of factory's total power generation, therefore, to the operational efficiency of water circulating pump into
Row is accurately monitored on-line to fired power generating unit economical operation important in inhibiting.
Circulating Water Pump Efficiency on-line monitoring needs accurate calculating water circulating pump flow and lift.And water circulating pump is imitated
Rate evaluation must be based on steady state condition, when circulation is in variable working condition condition, the power of motor of water circulating pump, flow,
The parameters such as lift are in change procedure, and there are large errors with actual value for calculated Circulating Water Pump Efficiency at this time, cannot
Accurately reflect level of efficiency.Secondly as circulating water flow is big flow parameter, for example, recycling in 600MW fired power generating unit
Water designs total flow up to nearly 70000t/h, and the measurement cost of the scene directly circulating water flow of measurement acquisition is higher, measurement essence
Degree is also difficult to be guaranteed.104863841 A of Chinese invention patent CN proposes circulating water pump in thermal power plant efficiency on-line monitoring
Method, this method import and export flow velocity, further calculate pump lift by directly acquiring water circulating pump flow, calculating water circulating pump,
Preceding to have addressed, this method is affected by flow measurement precision, it is difficult to guarantee the accuracy of calculated result.
Water circulating pump is divided into constant speed pump and two kinds of speed-variable pump, and fired power generating unit generally configures two water circulating pumps, thus deposits
It is combining, i.e. one two constant speed pumps, two speed-variable pumps or a constant speed pump speed-variable pump, the calculation method that different pump groups are closed is not
Equally, the case where present invention is pumped only for two constant speed pump groups solves the existing constant speed recirculated water pump group efficiency of pump and calculates accurately
The lower problem of rate.
Summary of the invention
The present invention provides a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method and systems, to improve
The constant speed recirculated water pump group efficiency of pump calculates accuracy rate.
The present invention provides a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring methods, comprising:
Obtain the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic model；
Obtain the generated output of fired power generating unit；
Whether two respective circulations of constant speed water circulating pump described in real-time judge are currently in steady-state operation work
Condition then calculates two water circulating pumps according to the pump characteristics model and pepeline characteristic model when being in steady state operating condition
Respective current lift and circulating water flow；Otherwise, terminate calculating process；
It is calculated according to the power of motor, current pump lift and previous cycle water flow of two constant speed water circulating pumps current
The constant speed recirculated water pump group efficiency of pump.
Preferably, in above-mentioned fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method, the judgement circulation
Whether water system currently specifically refers in steady state operating condition,
Obtain the respective power of motor of two constant speed water circulating pumps and revolving speed；
According to formula (1) and be formula (2) calculate separately unit generation power, the two constant speed circulation-water pump electric machine power and
The variance s of the respective filter value of two constant speed water circulating pumps revolving speed:
In formula: N is the sample number of sliding window；M is filtering series；xiFor the original value of the operation data at i-th of moment；xi′
For the filter value of the operation data at i-th of moment；For the arithmetic mean of instantaneous value of operation data filter value, wherein operation data is
Refer to unit generation power, the two constant speed circulation-water pump electric machine power and two constant speed water circulating pump revolving speed；
If unit generation power, the two constant speed circulation-water pump electric machine power and two constant speed water circulating pumps turn
The variance of fast filter value is respectively less than or is equal to threshold θ, then circulation is currently at lower state, wherein the value of threshold θ
Range is 0.5~3.0.
Preferably, described according in above-mentioned fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method
Pump characteristics model and pepeline characteristic model calculate the respective lift of two water circulating pumps and circulating water flow specifically refers to:
Obtain the model of two constant speed water circulating pumps；
Obtain the parameter of curve in the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic model；
Acquisition Hs is hydrostatic head,
When two constant speed water circulating pump models are identical, respective flow Q is calculated using formula (3)-(6)1、Q2And lift H
Calculation method are as follows:
Hz=Hs+rQ2 (3)
H=a1+a2Q/2+a3Q2/4 (4)
H=Hz (5)
Q1=Q2=Q/2 (6)
When two constant speed water circulating pump model differences, respective water circulating pump flow is calculated using formula (7)-(11) and is raised
The calculation method of journey are as follows:
Hz=Hs+rQ2 (7)
H1=a1,1+a1,2Q1+a1,3Q1 2 (8)
H2=a2,1+a2,2Q2+a2,3Q2 2 (9)
Hz=H1=H2) (10)
Q=Q1+Q2 (11)
Formula (3) is in formula (11), and Hz is drag overall pressure head, and Hs is hydrostatic head, H1、H2The lift of respectively every pump, Q are
Pipeline total flow, Q1、Q2The circulating water flow pumped for every, r, a1、a2、a3、a1,1、a1.2、a1.3、a2,1、a2,2、a2.3For the spy of pump
Linearity curve and characteristic curve of pipeline model coefficient,
Preferably, described according in above-mentioned fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method
Respective power of motor, lift and the circulating water flow of two constant speed water circulating pumps calculate constant speed recirculated water pump group efficiency of pump tool
Body refers to:
Formula (12)-(13), η1、η2The efficiency of respectively every constant speed water circulating pump, H1、H2Respectively every water circulating pump
Lift, Q1、Q2The flow of respectively every water circulating pump, Pgr1、Pgr2The power of motor of respectively every water circulating pump, ηgr1、
ηgr2The electric efficiency of respectively every water circulating pump, ρ are the density of recirculated water, and g is acceleration of gravity, ηmFor machine driving effect
Rate.
Preferably, in above-mentioned fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method, the characteristic of the pump
Curve and characteristic curve of pipeline model coefficient r, a1、a2、a3、a1,1、a1.2、a1.3、a2,1、a2,2、a2.3It is by system design description
Book or fitting experimental data obtain.
Preferably, in above-mentioned fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method, the value of M, N with adopt
Collect the unit generation power, the two constant speed circulation-water pump electric machine power and two constant speed water circulating pump revolving speed
Frequency t is related, and the value range of t is 1-5s.
Second aspect, the present invention provides a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring system, packets
It includes:
First data acquisition module: for obtaining the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic mould
Type；
Second data acquisition module: for obtaining the generated output of fired power generating unit；
System conditions judgment module: for judging that the respective circulation of two constant speed water circulating pumps is current
Whether steady state operating condition is in；
Constant speed water circulating pump property calculation module: for working as when the respective circulation of two constant speed water circulating pumps
Before when being in steady state operating condition, calculate the respective lift of two water circulating pumps and circulating water flow；
Constant speed recirculated water pump group efficiency of pump computing module: for according to the powers of motor of two constant speed water circulating pumps,
Pump lift and circulating water flow calculate the constant speed recirculated water pump group efficiency of pump.
Method provided by the invention establishes two water pump operation works the case where pump for two constant speed recirculated water pump groups
The real-time judge mechanism of condition, when two water pumps are steady state condition, just will calculate current steady state when inscribe respective lift and
Circulating water flow, and just using the presteady state when inscribe respective lift and circulating water flow and calculate current two constant speed
The recirculated water pump group efficiency of pump.That is, method provided by the invention can screen non-steady state state, solves existing skill
Art is in monitoring process cannot distinguish between systematic steady state and calculating under unsteady state condition caused by non-steady state state
The group efficiency of pump, the poor problem of accuracy rate.Moreover, required parameter can be from DCS control system in above-mentioned judgement and calculating
Or directly read in power plant's SIS system, scene does not need additionally to increase the expensive ancillary equipment such as analysis or measuring instrumentss, at
This is lower.The performance driving economy that water circulating pump can accurately be grasped using method provided by the invention is horizontal, and can be with
On this basis, any energy saving optimizing measure done to circulation carries out effective evaluation.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is that a kind of process of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method provided by the invention is shown
It is intended to；
A kind of Fig. 2 structural representation of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring system provided by the invention
Figure.
Specific embodiment
The present invention provides a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method and system, fixed to improve
The fast recirculated water pump group efficiency of pump calculates accuracy rate.
The present invention provides a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring methods, for two constant speed
The case where recirculated water pump group pumps, referring to FIG. 1, steps are as follows the figure shows the process of this method:
In step sl, the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic model are obtained.By
Systems design specification or fitting experimental data obtain the characteristic curve and characteristic curve of pipeline model coefficient of the pump.
In step s 2, the generated output of fired power generating unit is obtained.Acquisition modes can be DCS control system or power plant SIS
It is directly read in system.Scene does not need additionally to increase the expensive ancillary equipment such as analysis or measuring instrumentss, and cost is relatively low.
In step s3, whether two respective circulations of constant speed water circulating pump described in real-time judge are currently in
Steady state operating condition, it is when being in steady state operating condition, then in step s 5, special according to the pump characteristics model and pipeline
Property model calculate the respective current lift of two water circulating pumps and circulating water flow；Otherwise, in step s 4, terminate to calculate
Journey.As it can be seen that only two are in stable state invention introduces the judgement to two constant speed water circulating pump real time execution operating conditions
When operation, data are just acquired,
Finally, in step s 6, follow according to the power of motor of two constant speed water circulating pumps, current pump lift and currently
Ring water flow calculates the current constant speed recirculated water pump group efficiency of pump.Using the data under stable state, ensure that will not be because of collected
There are errors with respective actual value for data, and cause the accuracy using the current group of efficiency of pump obtained after these data poor.
The present invention overcomes the energy conservations in existing method, instructing fired power generating unit with the group efficiency of pump under unsteady drying is foundation
Optimize and there are the problem of.The performance driving economy of water circulating pump can be accurately grasped using method provided by the invention
Level does energy saving optimizing measure progress effective evaluation to circulation for foundation with secondary.
It specifically refers in step S3, judging whether circulation is currently in steady state operating condition according to following step
It is rapid to carry out:
Firstly, obtaining the respective power of motor of two constant speed water circulating pumps and revolving speed.Acquisition modes can be controlled for DCS
It is directly read in system processed or power plant's SIS system.
Secondly, according to formula (1) and being that formula (2) calculates separately unit generation power, two constant speed circulation-water pump electric machine power
With the variance s of the respective filter value of two constant speed water circulating pumps revolving speed:
In formula: N is the sample number of sliding window；M is filtering series；xiFor the original value of the operation data at i-th of moment；xi′
For the filter value of the operation data at i-th of moment；For the arithmetic mean of instantaneous value of operation data filter value, wherein operation data is
Refer to unit generation power, the two constant speed circulation-water pump electric machine power and two constant speed water circulating pump revolving speed.
If unit generation power, the two constant speed circulation-water pump electric machine power and two constant speed water circulating pumps turn
The variance of fast filter value is respectively less than or is equal to threshold θ, then circulation is currently at lower state, wherein the value of threshold θ
Range is 0.5~3.0.M, N be constant, value and acquisition unit generated output, two constant speed circulation-water pump electric machine power and
The frequency t of two constant speed water circulating pump revolving speeds is related, and the value range of t is 1-5s.The value of t is smaller, organizes the accurate of the efficiency of pump
It spends higher.The frequency acquisition of 1-5s meets national standard, and the obtained group efficiency of pump is that accurately, those skilled in the art can be
Decide the height of frequency acquisition within the scope of this in its sole discretion, the present invention is without limitation.
For being calculated in step S5 according to the pump characteristics model and pepeline characteristic model, two water circulating pumps are respective to be raised
Journey and circulating water flow specifically refer to:
Firstly, obtaining the model of two constant speed water circulating pumps.The model of pump can be obtained according to equipment specification.
Secondly, obtaining the curve ginseng in the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic model
R, a in several, in particular to following formula1、a2、a3、a1,1、a1.2、a1.3、a2,1、a2,2、a2.3It is by systems design specification or experiment
Data fitting obtains.
Again, obtaining Hs by field test is hydrostatic head.
When two constant speed water circulating pump models are identical, respective flow Q is calculated using formula (3)-(6)1、Q2And lift H
Calculation method are as follows:
Hz=Hs+rQ2 (3)
H=a1+a2Q/2+a3Q2/4 (4)
H=Hz (5)
Q1=Q2=Q/2 (6)
When two constant speed water circulating pump model differences, respective water circulating pump flow is calculated using formula (7)-(11) and is raised
The calculation method of journey are as follows:
Hz=Hs+rQ2 (7)
H1=a1,1+a1,2Q1+a1,3Q1 2 (8)
H2=a2,1+a2,2Q2+a2,3Q2 2 (9)
Hz=H1=H2) (10)
Q=Q1+Q2 (11)
Formula (3) is in formula (11), and Hz is drag overall pressure head, and Hs is hydrostatic head, H1、H2The lift of respectively every pump, Q are
Pipeline total flow, Q1、Q2The circulating water flow pumped for every, r, a1、a2、a3、a1,1、a1.2、a1.3、a2,1、a2,2、a2.3For the spy of pump
Linearity curve and characteristic curve of pipeline model coefficient.
As it can be seen that in above formula (3)-(11), it is known that parameter are as follows: Hs, r, a1、a2、a3、a1,1、a1.2、a1.3、a2,1、 a2,2、
a2.3, unknown parameter Hz, H1、H2、Q1、Q2, i.e. five equations, five unknown numbers can be each in the hope of two constant speed water circulating pumps
From current lift and flow.
In step s 6, according to respective power of motor, lift and the circulating water flow of two constant speed water circulating pumps
The constant speed recirculated water pump group efficiency of pump is calculated to specifically refer to carry out according to the following formula:
Formula (12)-(13), η1、η2The efficiency of respectively every constant speed water circulating pump, H1、H2Respectively every water circulating pump
Lift, Q1、Q2The flow of respectively every water circulating pump, Pgr1、Pgr2The power of motor of respectively every water circulating pump, ηgr1、
ηgr2The electric efficiency of respectively every water circulating pump, ρ are the density of recirculated water, and g is acceleration of gravity, ηmFor machine driving effect
Rate.Pgr1、Pgr2、ηgr1、ηgr2It is known.
Referring to FIG. 2, the figure shows the fired power generating unit constant speed recirculated water pump group efficiency of pump provided by the invention on-line monitorings
The structural schematic diagram of system, comprises the following modules as shown in the figure, and concrete function is as follows.
First data acquisition module: for obtaining the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic mould
Type；
Second data acquisition module: for obtaining the generated output of fired power generating unit and obtaining two constant speed water circulating pumps
Respective power of motor and revolving speed are obtained especially by OPC mode from DCS or SIS system.The data of acquisition are by filtering
For system conditions judgment module, constant speed water circulating pump property calculation module and constant speed recirculated water pump group efficiency of pump meter after reason
Module is calculated to use.
System conditions judgment module: for judging that the respective circulation of two constant speed water circulating pumps is current
Whether steady state operating condition is in.System conditions judgment module input data is unit generation power, each circulation
The filter value of pump motor power and revolving speed, exports to calculate enable signal, when judging that circulation is in steady-state operation work
When condition, the calculating enable signal value of output is 1, and otherwise, the calculating enable signal value of output is 0.Specific decision logic please join
It is admitted to the related introduction content for stating fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method, this is not repeated.
Constant speed water circulating pump property calculation module: for working as when the respective circulation of two constant speed water circulating pumps
Before when being in steady state operating condition, calculate the respective lift of two water circulating pumps and circulating water flow.Constant speed water circulating pump is special
Property computing module input include calculate enable signal, export as the flow and lift of every water circulating pump.Specifically calculated
Journey please refers to the related introduction content of above-mentioned fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method, this is not repeated.
Constant speed recirculated water pump group efficiency of pump computing module: for according to the powers of motor of two constant speed water circulating pumps,
Pump lift and circulating water flow calculate the constant speed recirculated water pump group efficiency of pump.Above-mentioned constant speed recirculated water pump group efficiency of pump computing module
Input include calculate enable signal, constant speed water circulating pump property calculation module calculate each water circulating pump flow, lift with
And the power of motor of every pump, it exports as the efficiency of every water circulating pump.Specific calculating process please refers to above-mentioned fired power generating unit
The related introduction content of constant speed recirculated water pump group efficiency of pump on-line monitoring method, this is not repeated.
The above is only a specific embodiment of the invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method characterized by comprising
Obtain the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic model；
Obtain the generated output of fired power generating unit；
Whether two respective circulations of constant speed water circulating pump described in real-time judge are currently in steady state operating condition, packet
It includes:
Obtain the respective power of motor of two constant speed water circulating pumps and revolving speed；
It according to formula (1) and is that formula (2) calculates separately unit generation power, the two constant speed circulation-water pump electric machine power and described
The variance s of the respective filter value of two constant speed water circulating pump revolving speeds:
In formula: N is the sample number of sliding window；M is filtering series；xiFor the original value of the operation data at i-th of moment；xi' it is the
The filter value of the operation data at i moment；For the arithmetic mean of instantaneous value of operation data filter value, wherein operation data refers to unit
Generated output, the two constant speed circulation-water pump electric machine power and two constant speed water circulating pump revolving speed；
If unit generation power, the two constant speed circulation-water pump electric machine power and two constant speed water circulating pump revolving speed filter
The variance of wave number is respectively less than or is equal to threshold θ, then circulation is currently at lower state, wherein the value range of threshold θ
It is 0.5~3.0；
When being in steady state operating condition, then two water circulating pumps are calculated according to the pump characteristics model and pepeline characteristic model
Respective current lift and circulating water flow；Otherwise, terminate calculating process；
Current constant speed is calculated according to the power of motor, current pump lift and previous cycle water flow of two constant speed water circulating pumps
The recirculated water pump group efficiency of pump.
2. a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method according to claim 1, feature
It is, it is described that the respective lift of two water circulating pumps and circulating water flow are calculated according to the pump characteristics model and pepeline characteristic model
Amount specifically refers to:
Obtain the model of two constant speed water circulating pumps；
Obtain the parameter of curve in the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic model；
Acquisition Hs is hydrostatic head；
When two constant speed water circulating pump models are identical, respective flow Q is calculated using formula (3)-(6)1、Q2And the calculating of lift H
Method are as follows:
Hz=Hs+rQ2 (3)
H=a1+a2Q/2+a3Q2/4 (4)
H=Hz (5)
Q1=Q2=Q/2 (6)
When two constant speed water circulating pump model differences, respective water circulating pump flow and lift are calculated using formula (7)-(11)
Calculation method are as follows:
Hz=Hs+rQ2 (7)
H1=a1,1+a1,2Q1+a1,3Q1 2 (8)
H2=a2,1+a2,2Q2+a2,3Q2 2 (9)
Hz=H1=H2) (10)
Q=Q1+Q2 (11)
Formula (3) is in formula (11), and Hz is drag overall pressure head, and Hs is hydrostatic head, H1、H2The lift of respectively every pump, Q is pipeline
Total flow, Q1、Q2The circulating water flow pumped for every, r, a1、a2、a3、a1,1、a1.2、a1.3、a2,1、a2,2、a2.3It is bent for the characteristic of pump
Line and characteristic curve of pipeline model coefficient.
3. a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method according to claim 2, feature
It is, it is described to be followed according to the respective power of motor, lift and circulating water flow of two constant speed water circulating pumps calculating constant speed
The ring water pump group efficiency of pump specifically refers to:
Formula (12)-(13), η1、η2The efficiency of respectively every constant speed water circulating pump, H1、H2Respectively every water circulating pump is raised
Journey, Q1、Q2The flow of respectively every water circulating pump, Pgr1、Pgr2The power of motor of respectively every water circulating pump, ηgr1、ηgr2Point
Not Wei every water circulating pump electric efficiency, ρ be recirculated water density, g is acceleration of gravity, ηmFor machinery driving efficiency.
4. a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method according to claim 3, feature
It is, the characteristic curve and characteristic curve of pipeline model coefficient r, a of pump1、a2、a3、a1,1、a1.2、a1.3、a2,1、a2,2、a2.3Be by
Systems design specification or fitting experimental data obtain.
5. a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring method according to claim 1, feature
It is, value and the acquisition unit generation power, the two constant speed circulation-water pump electric machine power and described two of M, N determine
The frequency t of fast water circulating pump revolving speed is related, and the value range of t is 1-5s.
6. a kind of fired power generating unit constant speed recirculated water pump group efficiency of pump on-line monitoring system characterized by comprising
First data acquisition module: for obtaining the respective pump characteristics model of two constant speed water circulating pumps and pepeline characteristic model；
Second data acquisition module: for obtaining the generated output of fired power generating unit；
System conditions judgment module: for judge the respective circulation of two constant speed water circulating pumps currently whether
It is in steady state operating condition, comprising:
Obtain the respective power of motor of two constant speed water circulating pumps and revolving speed；
Unit generation power, the two constant speed circulation-water pump electric machine power and described two are calculated separately according to formula (1) and formula (2)
The variance s of the respective filter value of platform constant speed water circulating pump revolving speed:
In formula: N is the sample number of sliding window；M is filtering series；xiFor the original value of the operation data at i-th of moment；xi' it is the
The filter value of the operation data at i moment；For the arithmetic mean of instantaneous value of operation data filter value, wherein operation data refers to unit
Generated output, the two constant speed circulation-water pump electric machine power and two constant speed water circulating pump revolving speed；
If unit generation power, the two constant speed circulation-water pump electric machine power and two constant speed water circulating pump revolving speed filter
The variance of wave number is respectively less than or is equal to threshold θ, then circulation is currently at lower state, wherein the value range of threshold θ
It is 0.5~3.0；
Constant speed water circulating pump property calculation module: currently equal for working as the respective circulation of two constant speed water circulating pumps
When in steady state operating condition, the respective lift of two water circulating pumps and circulating water flow are calculated；
Constant speed recirculated water pump group efficiency of pump computing module: for being raised according to power of motor, the pump of two constant speed water circulating pumps
Journey and circulating water flow calculate the constant speed recirculated water pump group efficiency of pump.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536774A (en) * | 2011-12-27 | 2012-07-04 | 酒泉钢铁(集团)有限责任公司 | Operation characteristics and operation energy efficiency analyzing device of industrial circulating water pump set |
| CN104863841A (en) * | 2015-04-30 | 2015-08-26 | 国家电网公司 | Method for online efficiency monitoring of circulating water pump in thermal power plant |
| CN205679967U (en) * | 2016-01-19 | 2016-11-09 | 长沙理工大学 | Circulating water pump in thermal power plant unit energy-saving monitoring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6079108A (en) * | 1983-10-07 | 1985-05-04 | Toshiba Corp | Circulating water pump controller |
-
2017
- 2017-09-12 CN CN201710817625.0A patent/CN107559212B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536774A (en) * | 2011-12-27 | 2012-07-04 | 酒泉钢铁(集团)有限责任公司 | Operation characteristics and operation energy efficiency analyzing device of industrial circulating water pump set |
| CN104863841A (en) * | 2015-04-30 | 2015-08-26 | 国家电网公司 | Method for online efficiency monitoring of circulating water pump in thermal power plant |
| CN205679967U (en) * | 2016-01-19 | 2016-11-09 | 长沙理工大学 | Circulating water pump in thermal power plant unit energy-saving monitoring device |
Non-Patent Citations (1)
| Title |
|---|
| 大型燃煤火电机组冷端系统建模及优化;王乾;《中国博士学位论文全文数据库（电子期刊）工程科技II辑》;20170215;C042-148 * |
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