CN107543733A - A kind of condenser duty on-line monitoring system and measuring method - Google Patents
A kind of condenser duty on-line monitoring system and measuring method Download PDFInfo
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Abstract
The present invention relates to a kind of condenser duty on-line monitoring system and measuring method, the system includes online data collection module, data preprocessing module, performance test demarcating module and data computation analysis module, main steam volume flow corresponding to different valve positions is demarcated by the ASME performance tests on the basis of condensing water flow using the computational methods of the system, based on this test data, the main steam flow of therrmodynamic system is calculated by the subsidiary such as other pressure and temperatures data, main feedwater flow, the parameters such as reheated steam flow, and then obtain the gross energy into turbine system；According to system capacity law of conservation, condenser duty is obtained after generator power and every loss are deducted from the gross energy for entering turbine system, so that the thermic load data accuracy finally given is high, real-time is good.
Description
Technical field
The present invention relates to a kind of condenser duty on-line monitoring system and measuring method, belongs to thermal power generating technology neck
Domain.
Background technology
With attention of the country to Energy-saving for Thermal Power Units emission reduction work, real time on-line monitoring turbine condenser thermic load pair
The energy-saving and emission-reduction work of thermal power generation corporations has great importance.
Currently acquired condenser duty typically has two methods：One kind is to calculate to enter condenser by positive balance method
Steam flow and steam enthalpy, condensing water flow and condensate enthalpy, the hydrophobic flow into condenser and hydrophobic enthalpy, from
And direct solution condenser duty；Another method is to flow through the circulating cooling water flow of condenser by measurement and pass in and out solidifying
The circulating cooling coolant-temperature gage of vapour device calculates condenser duty.
Above-mentioned first method is because low pressure (LP) cylinder exhaust enthalpy will be calculated by the energy balance of complete machine, the test ginseng being related to
Number and test instrumentation are more, therefore precision is difficult to be guaranteed.
Above-mentioned second method needs accurate measurement circulating cooling water flow and passes in and out the circulating water temperature of condenser.So
And the unit recirculated cooling water pipeline diameter of 300MW grades and the above reaches 2m-3m, can not with the higher flow nozzle of precision or
Orifice plate measures, and the measurement accuracy of ultrasonic flowmeter is poor；Secondly, recirculated cooling water temperature rise is usually no more than 10 DEG C, i.e.,
Less thermometric error also can be brought larger error to the calculating of condenser duty.
The relation of condenser duty computational methods utilization heat rate rate and load described in patent 201510007306.4 is bent
Line, operational factor is reversely corrected, obtains thermal loss of steam turbine rate, and then try to achieve corresponding condenser duty.This method
The heat consumption rate and load relation curve of institute's foundation are only capable of the thermal loss of steam turbine reflected under unit experiment isolation, and actual motion
Middle unit is not at isolation, and most of units, in the presence of externally drawing gas, boiler soot-blowing blowdown etc. influences, therefore this method
Computational accuracy be limited by having a great influence for system mode.
The content of the invention
The present invention is in order to solve problems of the prior art, there is provided a kind of accurately real time on-line monitoring condenser heat
The System and method for of load.
In order to achieve the above object, technical scheme proposed by the present invention is：A kind of condenser duty on-line monitoring system,
For monitoring the thermic load of condenser in thermal power generation unit on-line, the system includes online data collection module, data are located in advance
Manage module, performance test demarcating module and data computation analysis module, the online data collection module and data prediction mould
Block is connected, and data preprocessing module connection is connected with performance test demarcating module, and performance test demarcating module calculates with data to be divided
Analyse module connection, the generator outlet that the online data collection module includes several pressure-temperature sensors, unit carries
Flow sensor on the electrodymamometer and heat supply extraction line at place, several pressure-temperature sensors are respectively arranged at main steam
Pipeline, reheated steam pipeline, heat supply bleed steam pipework, heat supply draw gas water return pipeline, final supply line, cold steam pipework again, again
Hot desuperheat water lines, entrance and the water inlet of outlet and high-pressure heater of reheating attemperator, delivery port, air intake with it is hydrophobic
At mouthful；The thermal power generation unit mesohigh heater is provided with three, respectively the first high-pressure heater, the second high-pressure heater
With the 3rd high-pressure heater, the online data collection module is used to collect online data, and the data preprocessing module is used for
Online data is pre-processed, the performance test demarcating module is used to store the base crossed by high-precision A SME Experimental Calibrations
Quasi- data, and pretreated data are received, and the reference datas such as main steam volume flow are obtained according to pretreated data,
The data computation analysis module is used to online data and reference data calculate analysis, and to obtain turbine condenser heat negative
Lotus.
Above-mentioned technical proposal is improved to：The data computation analysis module includes data conversion module and data calculate
Module, the data conversion module are used for the pressure for collecting pressure-temperature sensor by water and vapor quality computation software package
The data such as density and enthalpy are converted to temperature data.
Above-mentioned technical proposal is improved to：Also include terminal display module, the terminal display module calculates with data
Analysis module connects, for receiving condenser duty data and being shown.
A kind of condenser duty On-line Measuring Method using above-mentioned condenser duty on-line monitoring system, including such as
Lower step：
Step 1, pass through the pressure and temperature of steam and water in each pipeline in pressure-temperature sensor collection thermal power generation unit
Deng online data, and collect the online datas such as the generator power in thermal power generation unit DCS system and the heat supply amount of drawing gas；
Step 2, required reference data is calculated by ASME Experimental Calibrations；
Step 3, according to step 1 collect pressure and temperature data using water and vapor quality computation software package calculate steam with
The density and enthalpy data of water；
The mass flow of steam and water in each pipeline in step 4, calculating thermal power generation unit；
Step 5, the heat that turbine system obtains in thermal power generation unit is calculated,
Q0=Fmhm+Frhr-Fwhw-Fcrhcr-Frhshrhs-Fcq(hcq-hhs)+3600(Wf+Wn)ηT (9)
In formula：Q0The heat obtained for turbine system, FmFor main steam flow, hmFor main steam enthalpy, FrFor reheated steam stream
Amount, hrFor reheated steam enthalpy, FwFor final feedwater flow, hwFor final Enthalpy of Feed Water, FcrFor cold steam flow again, hcrTo be cold
Steam enthalpy again, FrhsFor reheating attemperation water flow, hrhsFor reheating desuperheating water enthalpy, FcqFor heat supply extraction flow, hcqFor heat supply
Draw gas enthalpy, hhsDrawn gas backwater enthalpy for heat supply, WfFor water supply pump motor power, kW； WnFor solidifying pump motor power, ηTFor work(heat
Conversion efficiency；
Step 6, calculate condenser duty；
Principle according to system capacity conservation calculates condenser duty；
In formula：QnFor condenser duty, WcFor generator power, ηgFor generator efficiency, ηmFor mechanical efficiency.
Above-mentioned technical proposal is improved to：The content of ASME experiments is in the step 2：
1. main steam volume flow corresponding to different steam turbine comprehensive valve positions is tested by high-precision thermal performance test,
2. by becoming steam temperature experimental test high pressure cylinder and the gap bridge steam loss D of intermediate pressure cylinder conjunction cylinder junctiong。
Above-mentioned technical proposal is improved to：The mass flow calculated in the step 4 includes main steam mass flow, most
Whole feedwater flow, cold steam flow again, reheating spray water flux and reheated steam flow.
Above-mentioned technical proposal is improved to：The computational methods of the main steam mass flow are：
1. gather steam turbine comprehensive valve place value ψi, current composite valve place value ψ is obtained according to the reference data of step 2iCorresponding master
Vapour volume flow Qi；
2. gather main steam pressure force value PmWith main steam temperature value tm, main steaming is calculated by water and vapor quality computation software package
Vapour density ρm；
3. utilize main steam volume flow QiWith main steam density pmCalculate main steam mass flow Fm；
The computational methods of the final feedwater flow are：
Fw=Fm+D0
In above formula：D0For furnace side carbonated drink working medium discharge rate.
Above-mentioned technical proposal is improved to：The computational methods of the cold steam flow again are：
1. gather the intake pressure P of the first high-pressure heater1j, inflow temperature t1j, discharge pressure P1c, leaving water temperature t1c, enter vapour
Pressure P1, throttle (steam) temperature t1, hydrophobic pressure Ps1, drain temperature ts1Etc. parameter；
The water inlet enthalpy h of high-pressure heater is calculated by water and vapor quality computation software package1j, water outlet enthalpy h1c, steam admission enthalpy
Value h1, hydrophobic enthalpy hs1, calculate extraction flow F1；
2. gathering the second height adds water pressure P2j, inflow temperature t2j, discharge pressure P2c, leaving water temperature t2c, initial steam pressure P2, enter
Stripping temperature t2, hydrophobic pressure Ps2, drain temperature ts2Etc. parameter；
#2 height is calculated by water and vapor quality computation software package and adds water enthalpy h2j, water outlet enthalpy h2c, steam admission enthalpy value h2、
Hydrophobic enthalpy hs2, calculate 2 sections of extraction flow F2, wherein the second high discharge pressure P added2c, leaving water temperature t2cAdd with the first height
Intake pressure P1j, inflow temperature t1jTake same numerical value；
3. calculate cold steam flow F againcr,
Fcr=Fm-F1-F2-Dm-Dg-DzIn above formula：DgFor gap bridge air leakage, DmFor door rod steam loss, DzFor high pressure cylinder rear shaft seal
Steam loss.
Above-mentioned technical proposal is improved to：The computational methods of the reheating spray water flux are：
1. gather the pressure P before reheating attemperatorzqWith temperature tzq, pressure P after reheating attemperatorzhWith temperature tzh, reheating subtracts
The pressure P of warm waterrhsWith temperature trhs；
2. the steam enthalpy h before reheating attemperator is calculated by water and vapor quality computation software packagezq, after reheating attemperator
Steam enthalpy hzh, reheating desuperheating water enthalpy hrhs, calculate reheating spray water flux Frhs；
Above-mentioned technical proposal is improved to：The calculation formula of the reheated steam flow is：
Fr=Fcr+Frhs。
Beneficial effects of the present invention are：
(1) main steam flow and reheated steam flow are to calculate acquisition indirectly using the data and reference data of on-line monitoring, because
This is not influenceed by isolation of system, is adapted in line computation；(2) main steam volume flow is tested by high-precision ASME and obtained, and
As a reference value, therefore accuracy is high；(3) parameter needed for the present invention, such as comprehensive valve position, generator power, pressure, temperature
Deng, these parameters are direct measurement parameter, therefore parameter easily obtain and data it is reliable；(4) because Steam Turbine is big every time
It is required for carrying out thermal performance test before and after repairing, therefore is advantageous to present invention demarcation main steam flow coefficient of discharge.
Brief description of the drawings
Fig. 1 is the structural representation of system of the embodiment of the present invention.
Fig. 2 is that data acquisition element of the embodiment of the present invention arranges schematic diagram.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in detail.
Embodiment：
As shown in figure 1, a kind of condenser duty on-line monitoring system of the present embodiment, for monitoring thermal power generation unit on-line
The heat consumption rate of middle condenser, the system include online data collection module, data preprocessing module, performance test demarcating module,
Data computation analysis module and terminal display module, online data collection module are connected with data preprocessing module, and data are located in advance
Reason module connection is connected with performance test demarcating module, and performance test demarcating module is connected with data computation analysis module.
The electric work at generator outlet that online data collection module carries including several pressure-temperature sensors, unit
Flow sensor on rate meter and heat supply extraction line, online data collection module is used to collect pressure and temperature etc. in line number
According to data preprocessing module is used to pre-process online data, and performance test demarcating module passes through high accuracy for storage
The reference data that ASME Experimental Calibrations are crossed, and pretreated data are received, and obtain main steam according to pretreated data
The reference data such as volume flow and reheated steam mass flow, data computation analysis module include data conversion module and data meter
Calculate module, data conversion module be used for pressure pressure-temperature sensor collected by water and vapor quality computation software package with
Temperature data is converted to the data such as density and enthalpy, and data computation module is used to online data and reference data calculate to divide
Analysis obtains thermal loss of steam turbine rate.Terminal display module is connected with data computation analysis module, is gone forward side by side for receiving heat rate data
Row display.
As shown in Fig. 2 include boiler 1, major steam line, again using the thermal power generation unit of the monitoring system of the present embodiment
Vapours pipeline, cold steam pipework again, high pressure cylinder 2, intermediate pressure cylinder 3, low pressure (LP) cylinder 4, generator 5, condenser 6, solidifying pump 7, low pressure add
Hot device 8, oxygen-eliminating device 9, feed pump 10, the first high-pressure heater 11, the second high-pressure heater 12, the 3rd high-pressure heater 13, most
Whole supply line 14, overheat attemperator 15, reheating attemperator 16,17, one sections of bleed steam pipeworks 18, heat supplies of diminishing pipeline are drawn gas again
Pipeline 19 and heat supply draw gas water return pipeline 24, overheat attemperator 15 and reheating attemperator 16 be arranged in boiler 1, overheat desuperheat
The outlet of device 15 is connected by major steam line with the entrance of high pressure cylinder 2, and the outlet of high pressure cylinder 2 passes through cold steam pipework again and reheating
The entrance connection of attemperator 16, the outlet of reheating attemperator 16 are connected by reheated steam pipeline with the entrance of intermediate pressure cylinder 3, middle pressure
The outlet of cylinder 3 is connected with the entrance of low pressure (LP) cylinder 4, and the outlet of low pressure (LP) cylinder 4 is connected with condenser 6, coagulates pump 7, low-pressure heater 8, oxygen-eliminating device 9
And feed pump 10 is set in turn between condenser 6 and high-pressure heater along water (flow) direction, high-pressure heater is by finally feeding water
Pipeline 14 is connected with overheating the entrance of attemperator 15, heat supply draw gas water return pipeline 24 be connected to low-pressure heater 8 and oxygen-eliminating device 9 it
Between, heat supply bleed steam pipework 19 is connected to the exit of intermediate pressure cylinder 3, and one section of one end of bleed steam pipework 18 is connected on high pressure cylinder 2, the other end
It is connected with the air intake of the first high-pressure heater 13, then diminishing pipeline 17 is between feed pump 10 and reheating attemperator 16, and with
Feed pump 10 and reheating attemperator 16 are connected, and the air intake of the second high-pressure heater 12 is connected with cold steam pipework again, in main steam
Pipeline, reheated steam pipeline, heat supply bleed steam pipework, heat supply draw gas water return pipeline, final supply line, cold steam pipework again, again
Hot desuperheat water lines, entrance and the water inlet of outlet and high-pressure heater of reheating attemperator, delivery port, air intake and hydrophobic
Pressure-temperature sensor is equipped with mouthful.
It is to be based on thermal performance test data and be using the thermal loss of steam turbine rate On-line Measuring Method of said detecting system
What law of conservation of energy of uniting proposed, comprise the following steps：
(1) reference data needed for calculating in high-precision thermal performance test calibration and measuring system is passed through
1. main steam volume flow corresponding to some groups of difference comprehensive valve positions is tested by high-precision thermal performance test, it is such as public
Shown in formula (1)：
In formula：ψ is comprehensive valve place value, unit %；Q is main vapour volume flow, unit m3/h；
2. by becoming the gap bridge steam loss D at steam temperature experimental test high intermediate pressure cylinder conjunction cylinderg；Divide cylinder unit for high pressure, be not required to
This is tested, now gives tacit consent to this numerical value for 0；
(2) steam turbine comprehensive valve place value is gathered, it is current comprehensive by the way that two column datas described in formula (1) are carried out with linear interpolation acquisition
Close valve place value ψiCorresponding main steam volume flow Qi；
The main steam pressure force value P that will be collected simultaneouslymWith main steam temperature value tm, pass through water and vapor quality computation software package meter
Calculate main steam density pm, the volume flow of main steam is converted into main steam mass flow Fm；
(3) main feedwater flow is calculated by formula (3),
Fw=Fm-D0Formula (3)
In formula：FwFor main feedwater flow, unit t/h；FmFor main steam flow, unit t/h；D0Arranged for furnace side carbonated drink working medium
Output, is a constant, unit t/h；
(4) the first height of collection adds water pressure P1j, inflow temperature t1j, discharge pressure P1c, leaving water temperature t1c, initial steam pressure P1, enter
Stripping temperature t1, hydrophobic pressure Ps1, drain temperature ts1Etc. parameter, and #1 height is calculated by water and vapor quality computation software package and added
Water inlet enthalpy h1j, water outlet enthalpy h1c, steam admission enthalpy value h1, hydrophobic enthalpy hs1, substituted into formula (4) and calculate 1 section of extraction flow F1；
In formula：FwFor main feedwater flow, unit t/h；h1cFor the first high plus water outlet enthalpy, unit kJ/kg；h1jFor first
Height adds water enthalpy, unit kJ/kg；h1Vapour enthalpy, unit kJ/kg are added for the first height；hs1For the first HP heater drainage enthalpy
Value, unit kJ/kg；
(5) the second height of collection adds water pressure P2j, inflow temperature t2j, discharge pressure P2c, leaving water temperature t2c, initial steam pressure P2, enter
Stripping temperature t2, hydrophobic pressure Ps2, drain temperature ts2Etc. parameter, and it is high by water and vapor quality computation software package to calculate second
Add water enthalpy h2j, water outlet enthalpy h2c, steam admission enthalpy value h2, hydrophobic enthalpy hs2, substituted into formula (5) and calculate 2 sections of extraction flows
F2, wherein the second high discharge pressure P added2c, leaving water temperature t2cWith the first high intake pressure P added1j, inflow temperature t1jTake same
The numerical value of sample；
In formula：FwFor main feedwater flow, unit t/h；h2jWater enthalpy, unit kJ/kg are added for the second height；h2cFor second
Height plus water outlet enthalpy, unit kJ/kg；hs1For the first HP heater drainage enthalpy, unit kJ/kg；hs2For the second HP heater drainage enthalpy
Value, unit kJ/kg；
(6) by the main steam flow F of gained calculated abovem, 1 section of extraction flow F1, 2 sections of extraction flow F2, and door rod steam loss
Dm, gap bridge steam loss Dg, high pressure cylinder rear shaft seal steam loss DzThe cold reheated steam flow F of formula (6) calculating is substituted into etc. parametercr
Fcr=Fm-F1-F2-Dm-Dg-DzFormula (6)
Wherein, door rod steam loss DmWith high pressure cylinder rear shaft seal steam loss DzHandled according to design load；
(6) by gathering the pressure P before reheating attemperatorzqWith temperature tzq, pressure P after reheating attemperatorzhWith temperature tzh, again
The pressure P of hot desuperheating waterrhsWith temperature trhs, before calculating reheating attemperator by water and vapor quality computation software package respectively
Steam enthalpy hzq, steam enthalpy h after reheating attemperatorzh, reheating desuperheating water enthalpy hrhs, and substitute into formula (7) and calculate again
Hot spray water flux Frhs
In formula：FcrFor cold reheated steam flow, unit t/h；hzhFor the steam enthalpy after reheating attemperator, unit kJ/
kg； hzqFor the steam enthalpy before reheating attemperator, unit kJ/kg；hrhsFor reheating desuperheating water enthalpy, unit kJ/kg；
The cold steam flow F again that formula (6) is calculatedcr, formula (7) calculate reheating spray water flux Frhs, substitute into formula
(8) reheated steam flow F is calculatedr
Fr=Fcr+FrhsFormula (8)
(7) the main steam pressure P for collecting acquisition systemm, main steam temperature tm, reheated steam pressure Pr, reheat steam temperature
tr, final feed pressure Pw, final feed temperature tw, cold steam pressure P againcr, cold vapor (steam) temperature t againcr, reheating pressure of desuperheating water
Prhs, reheating desuperheat coolant-temperature gage trhs, heat supply extraction pressure Pcq, heat supply extraction temperature tcq, heat supply draws gas pressure of return water Phs, heat supply
Backwater temperature of drawing gas thsThe parameters such as degree are input to water and steam property computation software package and calculate main steam enthalpy h respectivelym, reheating
Steam enthalpy hr, final Enthalpy of Feed Water hfw, cold steam enthalpy h againcr, reheating desuperheating water enthalpy hrhs, heat supply draws gas enthalpy hcq, supply
Heat is drawn gas backwater enthalpy hhs；Then by water supply pump motor power Wf, solidifying pump motor power Wn, heat supply extraction flow Fcq, calculate institute
Primary steam flow Fm, formula (3) calculate winner of institute feedwater flow Fw, formula (8) calculate gained reheated steam flow Fr, formula
(6) the cold steam flow F again of gained is calculatedcr, formula (7) calculate gained reheating attemperation water flow FrhsAnd the ginseng such as corresponding enthalpy
Number substitutes into formula (9) and calculates the heat Q that the turbine system under the current operating condition of unit obtains0
Q0=Fmhm+Frhr-Fwhw-Fcrhcr-Frhshrhs-Fcq(hcq-hhs)+3600(Wf+Wn)ηTFormula (9)
In formula：Q0The heat obtained for turbine system, unit kJ/h, WfFor water supply pump motor power, unit kW； WnFor
Solidifying pump motor power, unit kW；ηTFor work(thermal conversion efficiency, constant, unit % are taken；
(9) principle according to system capacity conservation calculates condenser duty according to formula (10)
In formula：QnThe heat obtained for turbine system, unit kJ/h；WcFor generator power, unit t/h；ηgTo generate electricity
Engine efficiency, unit %；ηmIt is empirical value for mechanical efficiency, as constant processing, unit %.
Above-mentioned computational methods are demarcated main corresponding to different valve positions by the ASME performance tests on the basis of condensing water flow
Vapour volume flow, based on this test data, therrmodynamic system is calculated by the subsidiary such as other pressure and temperatures data
Main steam flow, main feedwater flow, the parameter such as reheated steam flow, and then obtain the gross energy into turbine system；According to
According to system capacity law of conservation, obtained after generator power and every loss are deducted from the gross energy for entering turbine system
Condenser duty, so that the thermic load data accuracy finally given is high, real-time is good, and is not influenceed by isolation of system.
A kind of condenser duty on-line detecting system and measuring method of the present invention is not limited to the various embodiments described above, all
The technical scheme obtained using equivalent substitution mode is all fallen within the scope of protection of present invention.
Claims (10)
1. a kind of condenser duty on-line monitoring system, for monitoring the thermic load of condenser in thermal power generation unit on-line,
It is characterized in that：Calculate and analyze including online data collection module, data preprocessing module, performance test demarcating module and data
Module, the online data collection module are connected with data preprocessing module, data preprocessing module connection and performance test mark
Cover half block is connected, and performance test demarcating module is connected with data computation analysis module, if the online data collection module includes
The flow sensing on the electrodymamometer and heat supply extraction line at generator outlet that dry pressure-temperature sensor, unit carry
Device, several pressure-temperature sensors are respectively arranged at major steam line, reheated steam pipeline, heat supply bleed steam pipework, heat supply are taken out
Vapour water return pipeline, final supply line, cold steam pipework again, reheating desuperheat water lines, reheating attemperator entrance with outlet with
And at the water inlet of high-pressure heater, delivery port, air intake and drain port；The thermal power generation unit mesohigh heater is provided with
Three, respectively the first high-pressure heater, the second high-pressure heater and the 3rd high-pressure heater, the online data collection module
For collecting online data, the data preprocessing module is used to pre-process online data, the performance test demarcation
Module is used to store the reference data crossed by high-precision A SME Experimental Calibrations, and receives pretreated data, and according to pre-
Data after processing obtain the reference datas such as main steam volume flow, the data computation analysis module be used for online data with
Reference data carries out calculating analysis and obtains turbine condenser thermic load.
2. condenser duty on-line monitoring system according to claim 1, it is characterised in that：The data calculate analysis mould
Block includes data conversion module and data computation module, and the data conversion module is used to pass through water and vapor quality software for calculation
The pressure and temperature data that pressure-temperature sensor is collected are converted to the data such as density and enthalpy by bag.
3. condenser duty on-line monitoring system according to claim 2, it is characterised in that：Also include terminal and show mould
Block, the terminal display module are connected with data computation analysis module, for receiving condenser duty data and being shown.
A kind of 4. condenser duty on-line measurement side using condenser duty on-line monitoring system described in claim 3
Method, it is characterised in that comprise the following steps：
Step 1, pass through the pressure and temperature of steam and water in each pipeline in pressure-temperature sensor collection thermal power generation unit
Deng online data, and collect the online datas such as the generator power in thermal power generation unit DCS system and the heat supply amount of drawing gas；
Step 2, required reference data is calculated by ASME Experimental Calibrations；
Step 3, according to step 1 collect pressure and temperature data using water and vapor quality computation software package calculate steam with
The density and enthalpy data of water；
The mass flow of steam and water in each pipeline in step 4, calculating thermal power generation unit；
Step 5, the heat that turbine system obtains in thermal power generation unit is calculated,
Q0=Fmhm+Frhr-Fwhw-Fcrhcr-Frhshrhs-Fcq(hcq-hhs)+3600(Wf+Wn)ηT
In formula：Q0The heat obtained for turbine system, FmFor main steam flow, hmFor main steam enthalpy, FrFor reheated steam stream
Amount, hrFor reheated steam enthalpy, FwFor final feedwater flow, hwFor final Enthalpy of Feed Water, FcrFor cold steam flow again, hcrTo be cold
Steam enthalpy again, FrhsFor reheating attemperation water flow, hrhsFor reheating desuperheating water enthalpy, FcqFor heat supply extraction flow, hcqFor heat supply
Draw gas enthalpy, hhsDrawn gas backwater enthalpy for heat supply, WfFor water supply pump motor power, kW；WnFor solidifying pump motor power, ηTFor work(heat
Conversion efficiency；
Step 6, calculate condenser duty；
Principle according to system capacity conservation calculates condenser duty；
In formula：QnFor condenser duty, WcFor generator power, ηgFor generator efficiency, ηmFor mechanical efficiency.
5. condenser duty On-line Measuring Method according to claim 4, it is characterised in that：ASME is tried in the step 2
The content tested is：
1. main steam volume flow corresponding to different steam turbine comprehensive valve positions is tested by high-precision thermal performance test,
2. by becoming steam temperature experimental test high pressure cylinder and the gap bridge steam loss D of intermediate pressure cylinder conjunction cylinder junctiong。
6. condenser duty On-line Measuring Method according to claim 5, it is characterised in that：Calculated in the step 4
Mass flow includes main steam mass flow, final feedwater flow, cold steam flow again, reheating spray water flux and reheated steam stream
Amount.
7. condenser duty On-line Measuring Method according to claim 6, it is characterised in that：The main steam mass flow
Computational methods be：
1. gather steam turbine comprehensive valve place value ψi, current composite valve place value ψ is obtained according to the reference data of step 2iCorresponding main steaming
Vapour volume flow Qi；
2. gather main steam pressure force value PmWith main steam temperature value tm, main steaming is calculated by water and vapor quality computation software package
Vapour density ρm；
3. utilize main steam volume flow QiWith main steam density pmCalculate main steam mass flow Fm；
The computational methods of the final feedwater flow are：
Fw=Fm+D0
In above formula：D0For furnace side carbonated drink working medium discharge rate.
8. condenser duty On-line Measuring Method according to claim 7, it is characterised in that：The cold steam flow again
Computational methods are：
1. gather the intake pressure P of the first high-pressure heater1j, inflow temperature t1j, discharge pressure P1c, leaving water temperature t1c, enter vapour pressure
Power P1, throttle (steam) temperature t1, hydrophobic pressure Ps1, drain temperature ts1Etc. parameter；
The water inlet enthalpy h of high-pressure heater is calculated by water and vapor quality computation software package1j, water outlet enthalpy h1c, steam admission enthalpy
Value h1, hydrophobic enthalpy hs1, calculate extraction flow F1；
2. gathering the second height adds water pressure P2j, inflow temperature t2j, discharge pressure P2c, leaving water temperature t2c, initial steam pressure P2, enter
Stripping temperature t2, hydrophobic pressure Ps2, drain temperature ts2Etc. parameter；
#2 height is calculated by water and vapor quality computation software package and adds water enthalpy h2j, water outlet enthalpy h2c, steam admission enthalpy value h2, dredge
Water enthalpy hs2, calculate 2 sections of extraction flow F2, wherein the second high discharge pressure P added2c, leaving water temperature t2cEnter with what the first height added
Water pressure P1j, inflow temperature t1jTake same numerical value.
3. calculate cold steam flow F againcr,
Fcr=Fm-F1-F2-Dm-Dg-DzIn above formula：DgFor gap bridge air leakage, DmFor door rod steam loss, DzFor high pressure cylinder rear axle leak sealing
Vapour amount.
9. condenser duty On-line Measuring Method according to claim 8, it is characterised in that：The reheating spray water flux
Computational methods are：
1. gather the pressure P before reheating attemperatorzqWith temperature tzq, pressure P after reheating attemperatorzhWith temperature tzh, reheating desuperheat
The pressure P of waterrhsWith temperature trhs；
2. the steam enthalpy h before reheating attemperator is calculated by water and vapor quality computation software packagezq, after reheating attemperator
Steam enthalpy hzh, reheating desuperheating water enthalpy hrhs, calculate reheating spray water flux Frhs；
10. condenser duty On-line Measuring Method according to claim 9, it is characterised in that：The reheated steam flow
Calculation formula be：
Fr=Fcr+Frhs。
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