CN106761967B - Pusher side steam parameter measured deviation consumes the appraisal procedure and system of coal cost to unit - Google Patents
Pusher side steam parameter measured deviation consumes the appraisal procedure and system of coal cost to unit Download PDFInfo
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- CN106761967B CN106761967B CN201611034410.3A CN201611034410A CN106761967B CN 106761967 B CN106761967 B CN 106761967B CN 201611034410 A CN201611034410 A CN 201611034410A CN 106761967 B CN106761967 B CN 106761967B
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- 239000003245 coal Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000003303 reheating Methods 0.000 claims abstract description 41
- 238000002474 experimental method Methods 0.000 claims description 28
- 230000004907 flux Effects 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 17
- 239000000523 sample Substances 0.000 claims description 5
- 238000013021 overheating Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 44
- 238000013461 design Methods 0.000 description 13
- 230000009466 transformation Effects 0.000 description 13
- 238000010276 construction Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- 238000005457 optimization Methods 0.000 description 6
- 238000010977 unit operation Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000004064 recycling Methods 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
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
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- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The appraisal procedure and system of coal cost are consumed to unit the invention discloses pusher side steam parameter measured deviation, this method measures and calculated main steam mean temperature in preset time period, the mean temperature of reheated steam, turbine discharge average pressure and main vapour average discharge using the test-meter for meeting ASME standards, and is used as actual value；Inquire about parameter corresponding in preset time period in the database of Data Acquisition System for Plant；The deviation between the main steam mean temperature inquired, the mean temperature of reheated steam and turbine discharge average pressure and corresponding actual value is calculated respectively, then calculates the overheat desuperheating water average discharge inquired respectively and reheating desuperheating water average discharge accounts for the percentage of main steam flow actual value；Look into and take relevant parameter heat consumption adjusted rate, the heat consumption adjusted rate of above-mentioned five parameters is added up, obtains heat consumption adjusted rate summation；Finally give the increased consumption coal cost in the thermal power plant estimated in units of currency.
Description
Technical field
The invention belongs to thermal power plants unit to consume coal evaluation areas, more particularly to a kind of pusher side steam parameter measured deviation
To the appraisal procedure and system of unit consumption coal cost.
Background technology
Steam turbine main steam throttle (steam) temperature, reheated steam throttle (steam) temperature, low pressure (LP) cylinder exhaust steam pressure, influence the circulation effect of unit
Rate.Wherein main steam temperature and reheat steam temperature are mainly the average endothermic temperature for influenceing circulation, and low pressure (LP) cylinder exhaust steam pressure is determined
The average exothermic temperature of circulation is determined, and Stream temperature degree and reheat temperature participate in the calculating of unit operation heat consumption rate, influence unit
Performance driving economy.Stream temperature degree and reheat temperature are too high simultaneously, more than operating standard limitation, it is necessary to throw desuperheating water, in order to avoid
Material at high temperature creep, size constantly change, the problems such as causing the relaxation of fastener, make unit that accident occur；Conversely, temperature mistake
It is low, it is necessary to open pipeline hydrophobic, in order to avoid cause water slug.Turbine low pressure cylinder exhaust steam pressure is too low, goes beyond the limit of value, causes end
Grade blade is broken.These parameters influence the security of unit operation.Therefore, the measurement accuracy of these pusher side steam parameters for
Ensure that the safety and economic operation of unit just seems particularly significant.
At present, arranged for the steam turbine main steam throttle (steam) temperature, reheated steam throttle (steam) temperature, low pressure (LP) cylinder of temperature of power plant steam turbine
These parameters of steam pressure, can be collected, and be stored in Data Acquisition System for Plant by Data Acquisition System for Plant
Database.Database by inquiring about Data Acquisition System for Plant can be obtained by main steam mean temperature, reheated steam it is flat
Equal temperature, turbine discharge average pressure, overheat desuperheating water average discharge and reheating desuperheating water average discharge these parameters.
But often there is measurement error in these parameters of Data Acquisition System for Plant measurement with actual value.Measurement is accurate
Pusher side steam parameter for power plant carry out hundred-point emulation provide accurate objective basis, be power network according to unit operation heat consumption
Rate carries out energy-saving distribution and has prepared necessary condition.Under actual conditions, the main vapour of many power plant's pusher sides, reheat temperature are higher than furnace side master
Vapour, reheat temperature, the pipeline efficiency calculated is commonly greater than 100%, it is clear that violates basic law.
Analyzed with a unit thermal performance certification test field case, to illustrate another phenomenon：According to design, steamer
When owner's steam throttle (steam) temperature reaches rated value, furnace side should not put into overheat desuperheating water, throttle (steam) temperature exceed design load 3-
5 DEG C, input overheat desuperheating water is to ensure the main steam temperature not overtemperature into steam turbine, before the actual measuring machine of power plant's thermal control device
Main steam temperature is 538.08 DEG C, and the actual attemperation water flow that overheats is 7.59t/h, raises unit heat consumption rate；Test-meter is real
Border measurement Stream temperature degree is 536.25 DEG C, 1.75 DEG C of off-design value, raises unit heat consumption rate, so due to main steam before machine
Temperature survey is inaccurate, causes unit heat consumption rate to raise.Equally, it is before the actual measurement intermediate pressure main stop valve of power plant's thermal control device
535.55 DEG C, it is 532.96 DEG C compared to test-meter measurement reheat steam temperature degree, higher 2.59 DEG C, is so led also due to being pressed in pusher side
Vapor (steam) temperature measurement is inaccurate before porthole, causes unit heat consumption rate to raise.According to design, recirculated water inflow temperature is 20 DEG C, volume
In the case of constant load, circulating water flow can ensure that steam turbine exhaust pressure reaches rated steam exhaust pressure 5.2kPa, actual motion
Turbine low pressure cylinder exhaust steam pressure is 7.75kPa higher 2.55kPa than design, raises unit heat consumption rate.Power plant's vacuum measurement table
It is relative pressure table to count the overwhelming majority, and calculating absolute pressure needs to carry out atmospheric pressure amendment, and it is true to be so not easy to operations staff
Determine the actual value of steam turbine exhaust pressure, be also just not easy to compared with design load, brought not to recycling water formulation flow
Just, it is higher to result in operation exhaust steam pressure.
In a word, unit in the construction period, have ignored pusher side steam parameter measurement error for unit operation economy at present
Influence, it is impossible to quantitative analysis coal consumption cost amount of increasing caused by pusher side steam parameter measurement error, so as to can not be accurate
Really unit is undergone technological transformation.
The content of the invention
In order to solve the shortcomings that prior art, the first object of the present invention is to provide a kind of pusher side steam parameter measured deviation
To the appraisal procedure of unit consumption coal cost.
A kind of pusher side steam parameter measured deviation of the present invention consumes the appraisal procedure of coal cost to unit, specifically includes following
Step：
Step 1：Measuring point is tested in thermal power plant site setup according to the requirement of ASME standards, using meeting ASME standards
Test-meter come measure and calculate main steam mean temperature in preset time period, the mean temperature of reheated steam, steam turbine row
Vapour average pressure and main vapour average discharge, the actual value using above-mentioned average value as corresponding parameter；
Step 2：Inquire about the average temperature of main steam corresponding in preset time period in the database of Data Acquisition System for Plant
Degree, the mean temperature of reheated steam, turbine discharge average pressure, overheat desuperheating water average discharge and reheating desuperheating water mean flow
Amount；
Step 3：The main steam mean temperature inquired, the mean temperature of reheated steam and turbine discharge is calculated respectively to put down
Deviation between pressure and corresponding actual value, then the overheat desuperheating water average discharge and reheating desuperheat inquired is calculated respectively
Water average discharge accounts for the percentage of main steam flow actual value；
Step 4：The deviation and percentage obtained according to step 3, the unit fair curve provided using manufactory, is looked into respectively
Take main steam temperature, reheat steam temperature, steam turbine exhaust pressure, overheat spray water flux and reheating spray water flux this five parameters
Heat consumption adjusted rate, the heat consumption adjusted rate of above-mentioned five parameters is added up, obtains heat consumption adjusted rate summation；
Step 5：It is multiplied according to this monovalent three of the heat consumption adjusted rate summation in preset time period, coal consumption and coal,
Obtain the increased consumption coal cost in thermal power plant estimated in units of currency.
The present invention's this method solve unit in the construction period, cause due to ignoring pusher side steam parameter measurement error
The coal consumption cost amount of increasing, so as to the technical barrier that accurately can not be undergone technological transformation to unit, using meeting ASME standards
The thermal power plant steam parameter of test-meter measurement is as actual value, in the database of existing Data Acquisition System for Plant
Data are measured value, calculate main steam mean temperature in the database of Data Acquisition System for Plant, the mean temperature of reheated steam
Deviation between turbine discharge average pressure and corresponding actual value, and overheat desuperheating water average discharge and reheating desuperheat
Water average discharge accounts for the percentage of main steam flow actual value, further according to above-mentioned deviation and percentage, inquires about corresponding to measured deviation
Heat consumption adjusted rate, coal consumption, the unit price of coal and heat consumption adjusted rate summation three is recycled to be multiplied, by qualitative assessment, with goods
Coin is that unit estimates increased coal consumption cost, to carry out the technological transformation of pusher side parameter measurement system, there is provided advance capital
Data, investment ceiling foundation is determined to formulate technical reform scheme by technology and economy comparison.Meanwhile also building rank for unit
Section, the design optimization type selecting of pusher side steam measurement system provide foundation.
In the step 1, main steam temperature experiment measuring point is arranged in main steam line.By being set in main steam line
Experiment measuring point is put, can so obtain accurate main steam temperature value.
In the step 1, the experiment measuring point of reheat steam temperature is arranged in reheaing steam pipe.By in reheated steam
Experiment measuring point is set in pipeline, can so obtain accurate reheat steam temperature value.
In the step 1, the experiment measuring point of steam turbine exhaust pressure is arranged at turbine low pressure cylinder exhaust region.By in vapour
Turbine low pressure (LP) cylinder exhaust region sets experiment measuring point, can so obtain accurate steam turbine exhaust pressure.
The turbine low pressure cylinder exhaust region adds multiple cylinder mould probes, for detecting steam turbine exhaust pressure.So
Popped one's head in by multiple cylinder moulds and detect steam turbine exhaust pressure, and then averaged, more accurately turbine discharge can be obtained
Pressure value.
These measuring points of the present invention can ensure that installation meets the test-meter of ASME standards enough；Accorded with used by experiment
Closing the test-meter of ASME standards can ensure that gathered data can preserve in time, be easy to inquiry to choose, and carry out the meter of average value
Calculate, by meeting the performance test data of ASME standards, actual value or true value can be used as.
The second object of the present invention is to provide the assessment system that a kind of pusher side steam parameter measured deviation consumes coal cost to unit
System.
A kind of pusher side steam parameter measured deviation of the present invention consumes the assessment system of coal cost to unit, including：
Meet the test-meter of ASME standards, it is set tries according to the requirement of ASME standards in thermal power plant site setup
At test point, for measuring and calculating main steam mean temperature in preset time period, the mean temperature of reheated steam, steam turbine row
Vapour average pressure and main vapour average discharge, the actual value using above-mentioned average value as corresponding parameter；
Enquiry module, it is used to inquiring about main steaming corresponding in preset time period in the database of Data Acquisition System for Plant
Vapour mean temperature, the mean temperature of reheated steam, turbine discharge average pressure, overheat desuperheating water average discharge and reheating desuperheat
Water average discharge；
Deviation and percentage computing module, it is used to calculating the main steam mean temperature inquired, reheated steam respectively
Deviation between mean temperature and turbine discharge average pressure and corresponding actual value, then calculate the overheat inquired respectively and subtract
Warm water average discharge and reheating desuperheating water average discharge account for the percentage of main steam flow actual value；
Heat consumption adjusted rate summation computing module, it is used to, according to obtained deviation and percentage, provide using manufactory
Unit fair curve, look into take main steam temperature, reheat steam temperature, steam turbine exhaust pressure, overheat spray water flux and again respectively
The heat consumption adjusted rate of this five parameters of hot spray water flux, the heat consumption adjusted rate of above-mentioned five parameters is added up, obtains heat consumption
Adjusted rate summation；
Increase consumption coal cost calculation module, its be used for according to the heat consumption adjusted rate summation in preset time period, coal consumption with
And this monovalent three of coal is multiplied, the increased consumption coal cost in thermal power plant estimated in units of currency is obtained.
The assessment system of coal cost, bag are consumed to unit present invention also offers another pusher side steam parameter measured deviation
Include：
Meet the test-meter of ASME standards, it is set tries according to the requirement of ASME standards in thermal power plant site setup
At test point, for measuring and calculating main steam mean temperature in preset time period, the mean temperature of reheated steam, steam turbine row
Vapour average pressure and main vapour average discharge, the actual value using above-mentioned average value as corresponding parameter；
Server, it is configured as：
Inquire about main steam mean temperature corresponding in preset time period in the database of Data Acquisition System for Plant, reheating
Mean temperature, turbine discharge average pressure, overheat desuperheating water average discharge and the reheating desuperheating water average discharge of steam；
The main steam mean temperature inquired, the mean temperature of reheated steam and turbine discharge average pressure are calculated respectively
Deviation between corresponding actual value, then the overheat desuperheating water average discharge inquired is calculated respectively and reheating desuperheating water is averaged
Flow accounts for the percentage of main steam flow actual value；
According to obtained deviation and percentage, the unit fair curve provided using manufactory, look into take main steam temperature respectively
Degree, reheat steam temperature, steam turbine exhaust pressure, the heat consumption amendment for overheating this five parameters of spray water flux and reheating spray water flux
Rate, the heat consumption adjusted rate of above-mentioned five parameters is added up, obtains heat consumption adjusted rate summation；
Be multiplied according to this monovalent three of the heat consumption adjusted rate summation in preset time period, coal consumption and coal, obtain with
Currency is the increased consumption coal cost in thermal power plant of unit estimation.
Main steam temperature experiment measuring point is arranged in main steam line.By setting experiment measuring point in main steam line,
Accurate main steam temperature value can so be obtained.
The experiment measuring point of reheat steam temperature is arranged in reheaing steam pipe.By setting examination in reheaing steam pipe
Test point, it can so obtain accurate reheat steam temperature value.
The experiment measuring point of steam turbine exhaust pressure is arranged at turbine low pressure cylinder exhaust region.By being arranged in turbine low pressure cylinder
Vapour side sets experiment measuring point, can so obtain accurate steam turbine exhaust pressure.
The turbine low pressure cylinder exhaust region adds multiple cylinder mould probes, for detecting steam turbine exhaust pressure.So
Popped one's head in by multiple cylinder moulds and detect steam turbine exhaust pressure, and then averaged, more accurately turbine discharge can be obtained
Pressure value.
These measuring points of the present invention can ensure that installation meets the test-meter of ASME standards enough；Accorded with used by experiment
Closing the test-meter of ASME standards can ensure that gathered data can preserve in time, be easy to inquiry to choose, and carry out the meter of average value
Calculate, by meeting the performance test data of ASME standards, actual value or true value can be used as.
The present invention system solves the problem unit in the construction period, cause due to ignoring pusher side steam parameter measurement error
The coal consumption cost amount of increasing, so as to the technical barrier that accurately can not be undergone technological transformation to unit, using meeting ASME standards
The thermal power plant steam parameter of test-meter measurement is as actual value, in the database of existing Data Acquisition System for Plant
Data are measured value, calculate main steam mean temperature in the database of Data Acquisition System for Plant, the mean temperature of reheated steam
Deviation between turbine discharge average pressure and corresponding actual value, and overheat desuperheating water average discharge and reheating desuperheat
Water average discharge accounts for the percentage of main steam flow actual value, further according to above-mentioned deviation and percentage, inquires about corresponding to measured deviation
Heat consumption adjusted rate, coal consumption, the unit price of coal and heat consumption adjusted rate summation three is recycled to be multiplied, by qualitative assessment, with goods
Coin is that unit estimates increased coal consumption cost, to carry out the technological transformation of pusher side parameter measurement system, there is provided advance capital
Data, investment ceiling foundation is determined to formulate technical reform scheme by technology and economy comparison.Meanwhile also building rank for unit
Section, the design optimization type selecting of pusher side steam measurement system provide foundation.
Beneficial effects of the present invention are：
(1) the of the invention unit that this method solve is in the construction period, due to ignoring pusher side steam parameter measurement error
The caused coal consumption cost amount of increasing, so as to the technical barrier that accurately can not be undergone technological transformation to unit, marked using ASME is met
The thermal power plant steam parameter of accurate test-meter measurement is as actual value, the database of existing Data Acquisition System for Plant
Interior data are measured value, calculate main steam mean temperature in the database of Data Acquisition System for Plant, reheated steam is averaged
Deviation between temperature and turbine discharge average pressure and corresponding actual value, and overheat desuperheating water average discharge and reheating
Desuperheating water average discharge accounts for the percentage of main steam flow actual value, further according to above-mentioned deviation and percentage, inquires about measured deviation pair
The heat consumption adjusted rate answered, coal consumption, the unit price of coal and heat consumption adjusted rate summation three is recycled to be multiplied, by qualitative assessment,
Increased coal consumption cost is estimated in units of currency, to carry out the technological transformation of pusher side parameter measurement system, there is provided prepayment money
This data, investment ceiling foundation is determined to formulate technical reform scheme by technology and economy comparison.Meanwhile also built for unit
Stage, the design optimization type selecting of pusher side steam measurement system provide foundation.
(2) of the invention system solves the problem unit in the construction period, due to ignoring pusher side steam parameter measurement error
The caused coal consumption cost amount of increasing, so as to the technical barrier that accurately can not be undergone technological transformation to unit, marked using ASME is met
The thermal power plant steam parameter of accurate test-meter measurement is as actual value, the database of existing Data Acquisition System for Plant
Interior data are measured value, calculate main steam mean temperature in the database of Data Acquisition System for Plant, reheated steam is averaged
Deviation between temperature and turbine discharge average pressure and corresponding actual value, and overheat desuperheating water average discharge and reheating
Desuperheating water average discharge accounts for the percentage of main steam flow actual value, further according to above-mentioned deviation and percentage, inquires about measured deviation pair
The heat consumption adjusted rate answered, coal consumption, the unit price of coal and heat consumption adjusted rate summation three is recycled to be multiplied, by qualitative assessment,
Increased coal consumption cost is estimated in units of currency, to carry out the technological transformation of pusher side parameter measurement system, there is provided prepayment money
This data, investment ceiling foundation is determined to formulate technical reform scheme by technology and economy comparison.Meanwhile also built for unit
Stage, the design optimization type selecting of pusher side steam measurement system provide foundation.
Brief description of the drawings
Fig. 1 is the flow chart that the pusher side steam parameter measured deviation of the present invention consumes the appraisal procedure of coal cost to unit；
Fig. 2 is the assessment system of the appraisal procedure for consuming coal cost to unit using pusher side steam parameter measured deviation of the present invention
System structural representation.
Embodiment
The present invention will be further described with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is that the pusher side steam parameter measured deviation of the present invention consumes the appraisal procedure flow chart of coal cost to unit.
Pusher side steam parameter measured deviation as shown in Figure 1 consumes the appraisal procedure of coal cost to unit, specifically includes following
Step：
Step 1：Measuring point is tested in thermal power plant site setup according to the requirement of ASME standards, using meeting ASME standards
Test-meter come measure and calculate main steam mean temperature in preset time period, the mean temperature of reheated steam, steam turbine row
Vapour average pressure and main vapour average discharge, the actual value using above-mentioned average value as corresponding parameter.
In specific implementation process, the experiment measuring point of the main steam temperature in step 1 is arranged in main steam line.
In step 1, the experiment measuring point of reheat steam temperature may be contained within reheaing steam pipe.
In step 1, the experiment measuring point of steam turbine exhaust pressure is arranged at turbine low pressure cylinder exhaust region.
Turbine low pressure cylinder exhaust region adds multiple cylinder mould probes, for detecting steam turbine exhaust pressure.
These measuring points of the present embodiment can ensure the enough test-meters for meeting ASME standards of installation；Experiment is used
The test-meter for meeting ASME standards can ensure that gathered data can preserve in time, be easy to inquiry choose, carry out average value
Calculating.
Wherein, the test-meter for meeting ASME standards is existing measurement main steam temperature, reheat steam temperature, steam turbine
Exhaust steam pressure device, these devices meet ASME standards.
Meet the test-meters of ASME standards at the trial, system stable operation enough time, the fluctuation to parameter is also controlled
System is in the scope required by minimum uncertainty.In a word, being capable of accurate measurement machine by meeting the test-meter of ASME standards
Side steam parameter.
Wherein, ASME standards are the testing standards that ASME formulates.
By the comparative experiment of ASME standards, pusher side steam parameter is determined, the then inquiry pair from power plant's data actuation
Service data is answered, is compared, it is power plant's pusher side steam parameter show value and actual difference that its difference, which is approximately considered,.Utilize system
The unit steam parameter fair curve of factory's offer is provided, looks into and takes deviation to heat consumption adjusted rate.Main vapour reheat temperature, exhaust steam pressure are to warm
Consumption adjusted rate sum is approximately equal to full factory's coal consumption adjusted rate sum, therefore is multiplied by full factory's coal according to the coal consumption in full factory's statistics phase
Consumption rate adjusted rate sum is multiplied by with coal price, it becomes possible to calculates with monetary measurement, due to the measurement of pusher side steam parameter not
Economic loss caused by accurate.
Test example：
To determine the thermal performance index of unit before certain factory's overhaul, certain DianKeYuan is entrusted to carry out heating power according to ASME standards
In testing, in order to analyze influence of the pusher side steam parameter measured deviation to unit operation economy, comparative experiment has been carried out.
Acquired pusher side steam parameter is listed as follows：
Step 2：Inquire about the average temperature of main steam corresponding in preset time period in the database of Data Acquisition System for Plant
Degree, the mean temperature of reheated steam, turbine discharge average pressure, overheat desuperheating water average discharge and reheating desuperheating water mean flow
Amount, as shown in table 3.
Step 3：The main steam mean temperature inquired, the mean temperature of reheated steam and turbine discharge is calculated respectively to put down
Deviation between pressure and corresponding actual value, then the overheat desuperheating water average discharge and reheating desuperheat inquired is calculated respectively
Water average discharge accounts for the percentage of main steam flow actual value.
Calculated exemplified by foundation upper table THA/3VWO1 operating modes：
Test the main vapour mean temperature of actual measurement
Tms=(535.48+537.02)/2=536.25 DEG C,
Test the reheating mean temperature of actual measurement
Test the turbine discharge average pressure of actual measurement
pz=(7.856+7.83+7.732+7.564)/4=7.75kPa.
Above is the performance test data by meeting ASME standards, can be used as actual value or true value.
Main steam mean temperature before machine in upper table, corresponding main steam mean temperature
Steam mean temperature before intermediate pressure main stop valve, corresponding reheated steam mean temperature
According to design, recirculated water inflow temperature is 20 DEG C, in the case of rated load, matches water circulating pump by adjusting, follows
Ring water-carrying capacity can ensure that steam turbine exhaust pressure reaches rated steam exhaust pressure 5.2kPa.
Corresponding overheat desuperheating water average discharge
qgr=0+4.0332+2.5949+0.1017+0.8569=7.587t/h,
Reheating desuperheating water average discharge
qzr=0+0+0=0t/h.
Above is the data gathered by Data Acquisition System for Plant, are the foundations that operation monitoring adjusts.
Its difference is respectively：
Main steam temperature difference：
Reheat steam temperature difference：
Steam turbine exhaust pressure difference：
Overheat desuperheating water accounts for the percentage of main steam flow：
Reheating desuperheating water accounts for the percentage of main steam flow：
Step 4：The deviation and percentage obtained according to step 3, the unit fair curve provided using manufactory, is looked into respectively
Take main steam temperature, reheat steam temperature, steam turbine exhaust pressure, overheat spray water flux and reheating spray water flux this five parameters
Heat consumption adjusted rate, the heat consumption adjusted rate of above-mentioned five parameters is added up, obtains heat consumption adjusted rate summation.
The unit steam parameter fair curve provided according to manufactory, looks into and takes deviation to heat consumption adjusted rate：
The heat consumption adjusted rate of Stream temperature degree deviation
Cms=0.0567%,
The heat consumption adjusted rate of reheat steam temperature deviation
Czr=0.0605%,
The heat consumption adjusted rate of steam turbine exhaust pressure deviation
Cp=3.0829%,
Overheat adjusted rate of the desuperheating water to heat consumption
Cqms=0.0193%,
Adjusted rate of the reheating desuperheating water to heat consumption
Cqzr=0%,
C heat consumption adjusted rate sums.
C=Cms+Czr+Cp+Cqms+Cqzr=0.0567%+0.0605%+3.0829%+0.0193%+0%=
3.2194%.
Step 5：It is multiplied according to this monovalent three of the heat consumption adjusted rate summation in preset time period, coal consumption and coal,
Obtain the increased consumption coal cost in thermal power plant estimated in units of currency.
According to statistics, power plant's fire coal in March W=93600 tons, coal γ=500 yuan per ton, due to the measurement of pusher side steam parameter not
Accurately cause coal consumption to increase, increased consumption coal cost B is estimated in units of currency：
Ten thousand yuan of B=W × C × γ=93600 × 500 × 3.2194%=150.6679
The present embodiment this method solve unit in the construction period, draw due to ignoring pusher side steam parameter measurement error
The coal consumption cost amount of increasing risen, so as to the technical barrier that accurately can not be undergone technological transformation to unit, using meeting ASME standards
Test-meter measurement thermal power plant steam parameter as actual value, in the database of existing Data Acquisition System for Plant
Data be measured value, calculate main steam mean temperature in the database of Data Acquisition System for Plant, the average temperature of reheated steam
Degree and the deviation between turbine discharge average pressure and corresponding actual value, and overheat desuperheating water average discharge and reheating subtract
Warm water average discharge accounts for the percentage of main steam flow actual value, and further according to above-mentioned deviation and percentage, inquiry measured deviation is corresponding
Heat consumption adjusted rate, recycle coal consumption, the unit price of coal and heat consumption adjusted rate summation three to be multiplied, by qualitative assessment, with
Currency is that unit estimates increased coal consumption cost, to carry out the technological transformation of pusher side parameter measurement system, there is provided advance capital
Data, for by technology and economy comparison formulate technical reform scheme investment ceiling foundation is determined.Meanwhile also building rank for unit
Section, the design optimization type selecting of pusher side steam measurement system provide foundation.
Provided by the invention kind of pusher side steam parameter measured deviation consumes the assessment system of coal cost to unit, including：
Meet the test-meter of ASME standards, it is set tries according to the requirement of ASME standards in thermal power plant site setup
At test point, for measuring and calculating main steam mean temperature in preset time period, the mean temperature of reheated steam, steam turbine row
Vapour average pressure and main vapour average discharge, the actual value using above-mentioned average value as corresponding parameter；
Enquiry module, it is used to inquiring about main steaming corresponding in preset time period in the database of Data Acquisition System for Plant
Vapour mean temperature, the mean temperature of reheated steam, turbine discharge average pressure, overheat desuperheating water average discharge and reheating desuperheat
Water average discharge；
Deviation and percentage computing module, it is used to calculating the main steam mean temperature inquired, reheated steam respectively
Deviation between mean temperature and turbine discharge average pressure and corresponding actual value, then calculate the overheat inquired respectively and subtract
Warm water average discharge and reheating desuperheating water average discharge account for the percentage of main steam flow actual value；
Heat consumption adjusted rate summation computing module, it is used to, according to obtained deviation and percentage, provide using manufactory
Unit fair curve, look into take main steam temperature, reheat steam temperature, steam turbine exhaust pressure, overheat spray water flux and again respectively
The heat consumption adjusted rate of this five parameters of hot spray water flux, the heat consumption adjusted rate of above-mentioned five parameters is added up, obtains heat consumption
Adjusted rate summation；
Increase consumption coal cost calculation module, its be used for according to the heat consumption adjusted rate summation in preset time period, coal consumption with
And this monovalent three of coal is multiplied, the increased consumption coal cost in thermal power plant estimated in units of currency is obtained.
Another pusher side steam parameter measured deviation that Fig. 2 is the present invention is shown the assessment system structure of unit consumption coal cost
It is intended to.
Assessment system as shown in Figure 2, specifically include following structure：
(1) test-meter of ASME standards is met
Meet the test-meter of ASME standards, it is set tries according to the requirement of ASME standards in thermal power plant site setup
At test point, for measuring and calculating main steam mean temperature in preset time period, the mean temperature of reheated steam, steam turbine row
Vapour average pressure and main vapour average discharge, the actual value using above-mentioned average value as corresponding parameter.
Wherein, the experiment measuring point of main steam temperature is arranged in main steam line.
The experiment measuring point of reheat steam temperature may be contained within reheaing steam pipe.
The experiment measuring point of steam turbine exhaust pressure is arranged at turbine low pressure cylinder exhaust region.
Turbine low pressure cylinder exhaust region adds multiple cylinder mould probes, for detecting steam turbine exhaust pressure.
These measuring points of the present invention can ensure the enough test-meters for meeting ASME standards of installation；Used by experiment
Meeting the test-meter of ASME standards can ensure that gathered data can preserve in time, be easy to inquiry to choose, carry out average value
Calculate.
Wherein, the test-meter for meeting ASME standards is existing measurement main steam temperature, reheat steam temperature, steam turbine
Exhaust steam pressure device, these devices meet ASME standards.
Meet the test-meters of ASME standards at the trial, system stable operation enough time, the fluctuation to parameter is also controlled
System is in the scope required by minimum uncertainty.In a word, being capable of accurate measurement machine by meeting the test-meter of ASME standards
Side steam parameter.
Wherein, ASME standards are the testing standards that ASME formulates.
(2) server
Server, it is configured as：
Inquire about main steam mean temperature corresponding in preset time period in the database of Data Acquisition System for Plant, reheating
Mean temperature, turbine discharge average pressure, overheat desuperheating water average discharge and the reheating desuperheating water average discharge of steam；
The main steam mean temperature inquired, the mean temperature of reheated steam and turbine discharge average pressure are calculated respectively
Deviation between corresponding actual value, then the overheat desuperheating water average discharge inquired is calculated respectively and reheating desuperheating water is averaged
Flow accounts for the percentage of main steam flow actual value；
According to obtained deviation and percentage, the unit fair curve provided using manufactory, look into take main steam temperature respectively
Degree, reheat steam temperature, steam turbine exhaust pressure, the heat consumption amendment for overheating this five parameters of spray water flux and reheating spray water flux
Rate, the heat consumption adjusted rate of above-mentioned five parameters is added up, obtains heat consumption adjusted rate summation；
Be multiplied according to this monovalent three of the heat consumption adjusted rate summation in preset time period, coal consumption and coal, obtain with
Currency is the increased consumption coal cost in thermal power plant of unit estimation.
The present embodiment system solves the problem unit in the construction period, draw due to ignoring pusher side steam parameter measurement error
The coal consumption cost amount of increasing risen, so as to the technical barrier that accurately can not be undergone technological transformation to unit, using meeting ASME standards
Test-meter measurement thermal power plant steam parameter as actual value, in the database of existing Data Acquisition System for Plant
Data be measured value, calculate main steam mean temperature in the database of Data Acquisition System for Plant, the average temperature of reheated steam
Degree and the deviation between turbine discharge average pressure and corresponding actual value, and overheat desuperheating water average discharge and reheating subtract
Warm water average discharge accounts for the percentage of main steam flow actual value, and further according to above-mentioned deviation and percentage, inquiry measured deviation is corresponding
Heat consumption adjusted rate, recycle coal consumption, the unit price of coal and heat consumption adjusted rate summation three to be multiplied, by qualitative assessment, with
Currency is that unit estimates increased coal consumption cost, to carry out the technological transformation of pusher side parameter measurement system, there is provided advance capital
Data, for by technology and economy comparison formulate technical reform scheme investment ceiling foundation is determined.Meanwhile also building rank for unit
Section, the design optimization type selecting of pusher side steam measurement system provide foundation.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. a kind of pusher side steam parameter measured deviation consumes the appraisal procedure of coal cost to unit, it is characterised in that including：
Step 1：Measuring point is tested in thermal power plant site setup according to the requirement of ASME standards, utilizes the examination for meeting ASME standards
Test instrument and put down to measure and calculate main steam mean temperature in preset time period, the mean temperature of reheated steam, turbine discharge
Equal pressure and main vapour average discharge, the actual value using above-mentioned average value as corresponding parameter；
Step 2：Inquire about main steam mean temperature corresponding in preset time period in the database of Data Acquisition System for Plant, again
Mean temperature, turbine discharge average pressure, overheat desuperheating water average discharge and the reheating desuperheating water average discharge of vapours；
Step 3：The main steam mean temperature inquired, the mean temperature of reheated steam and turbine discharge mean pressure are calculated respectively
Deviation between power and corresponding actual value, then the overheat desuperheating water average discharge inquired and reheating desuperheat level are calculated respectively
Equal flow accounts for the percentage of main steam flow actual value；
Step 4：The deviation and percentage obtained according to step 3, the unit fair curve provided using manufactory, is looked into take master respectively
Vapor (steam) temperature, reheat steam temperature, steam turbine exhaust pressure, the heat for overheating this five parameters of spray water flux and reheating spray water flux
Adjusted rate is consumed, the heat consumption adjusted rate of above-mentioned five parameters is added up, obtains heat consumption adjusted rate summation；
Step 5：It is multiplied, is obtained according to this monovalent three of the heat consumption adjusted rate summation in preset time period, coal consumption and coal
The increased consumption coal cost in thermal power plant estimated in units of currency.
2. a kind of pusher side steam parameter measured deviation as claimed in claim 1 consumes the appraisal procedure of coal cost to unit, it is special
Sign is, in the step 1, the experiment measuring point of main steam temperature and overheat attemperation water flow is arranged in main steam line.
3. a kind of pusher side steam parameter measured deviation as claimed in claim 1 consumes the appraisal procedure of coal cost to unit, it is special
Sign is, in the step 1, the experiment measuring point of reheat steam temperature and reheating attemperation water flow may be contained within reheaing steam pipe
It is interior.
4. a kind of pusher side steam parameter measured deviation as claimed in claim 1 consumes the appraisal procedure of coal cost to unit, it is special
Sign is, in the step 1, the experiment measuring point of steam turbine exhaust pressure is arranged at turbine low pressure cylinder exhaust region.
5. a kind of pusher side steam parameter measured deviation as claimed in claim 4 consumes the appraisal procedure of coal cost to unit, it is special
Sign is that the turbine low pressure cylinder exhaust region adds multiple cylinder mould probes, for detecting steam turbine exhaust pressure.
6. a kind of pusher side steam parameter measured deviation consumes the assessment system of coal cost to unit, it is characterised in that including：
Meet the test-meter of ASME standards, it sets to test in thermal power plant site setup according to the requirement of ASME standards and surveyed
At point, put down for measuring and calculating main steam mean temperature in preset time period, the mean temperature of reheated steam, turbine discharge
Equal pressure and main vapour average discharge, the actual value using above-mentioned average value as corresponding parameter；
Enquiry module, it is used to inquiring about main steam corresponding in preset time period in the database of Data Acquisition System for Plant and put down
Equal temperature, the mean temperature of reheated steam, turbine discharge average pressure, overheat desuperheating water average discharge and reheating desuperheat are horizontal
Equal flow；
Deviation and percentage computing module, it is used to calculating the main steam mean temperature inquired respectively, reheated steam is averaged
Deviation between temperature and turbine discharge average pressure and corresponding actual value, then the overheat desuperheating water inquired is calculated respectively
Average discharge and reheating desuperheating water average discharge account for the percentage of main steam flow actual value；
Heat consumption adjusted rate summation computing module, it is used for according to obtained deviation and percentage, the unit provided using manufactory
Fair curve, look into take main steam temperature, reheat steam temperature, steam turbine exhaust pressure, overheat spray water flux and reheating to subtract respectively
The heat consumption adjusted rate of this five parameters of warm water amount, the heat consumption adjusted rate of above-mentioned five parameters is added up, obtains heat consumption amendment
Rate summation；
Increase consumption coal cost calculation module, it is used for according to heat consumption adjusted rate summation, coal consumption and the coal in preset time period
This monovalent three be multiplied, obtain the increased consumption coal cost in thermal power plant estimated in units of currency.
7. a kind of pusher side steam parameter measured deviation consumes the assessment system of coal cost to unit, it is characterised in that including：
Meet the test-meter of ASME standards, it sets to test in thermal power plant site setup according to the requirement of ASME standards and surveyed
At point, put down for measuring and calculating main steam mean temperature in preset time period, the mean temperature of reheated steam, turbine discharge
Equal pressure and main vapour average discharge, the actual value using above-mentioned average value as corresponding parameter；
Server, it is configured as：
Inquire about main steam mean temperature corresponding in preset time period in the database of Data Acquisition System for Plant, reheated steam
Mean temperature, turbine discharge average pressure, overheat desuperheating water average discharge and reheating desuperheating water average discharge；
The main steam mean temperature inquired, the mean temperature of reheated steam and turbine discharge average pressure and phase are calculated respectively
Deviation between corresponding actual value, then the overheat desuperheating water average discharge inquired and reheating desuperheating water average discharge are calculated respectively
Account for the percentage of main steam flow actual value；
According to obtained deviation and percentage, the unit fair curve that is provided using manufactory, look into take main steam temperature, again respectively
Vapours temperature, steam turbine exhaust pressure, the heat consumption adjusted rate for overheating this five parameters of spray water flux and reheating spray water flux, will
The heat consumption adjusted rate of above-mentioned five parameters is added up, and obtains heat consumption adjusted rate summation；
It is multiplied, is obtained with currency according to this monovalent three of the heat consumption adjusted rate summation in preset time period, coal consumption and coal
For the increased consumption coal cost in thermal power plant of unit estimation.
8. such as the assessment system of claim 6 or 7, it is characterised in that the examination of the main steam temperature and overheat attemperation water flow
Test point is arranged in main steam line.
9. assessment system as claimed in claims 6 or 7, it is characterised in that the reheat steam temperature and reheating desuperheat current
The experiment measuring point of amount may be contained within reheaing steam pipe.
10. assessment system as claimed in claims 6 or 7, it is characterised in that the experiment measuring point of the steam turbine exhaust pressure is set
It is placed in turbine low pressure cylinder exhaust region.
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| CN107463739B (en) * | 2017-07-27 | 2020-08-04 | 华北电力科学研究院有限责任公司 | Method and device for analyzing desuperheating water flow |
| CN108629523B (en) * | 2018-05-11 | 2022-04-19 | 中国神华能源股份有限公司 | Method and device for calculating deviation amount of coal consumption in power generation of thermal power plant and storage medium |
| CN110469372B (en) * | 2019-08-21 | 2022-04-12 | 西安热工研究院有限公司 | Uncertainty control method for thermal performance test of steam turbine |
| CN112131685B (en) * | 2020-09-29 | 2024-02-02 | 西安热工研究院有限公司 | Uncertainty evaluation method for overall thermodynamic performance test of combined cycle unit |
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