CN102495607A - Fossil power unit on-line performance monitoring method on basis of Symphony system - Google Patents

Fossil power unit on-line performance monitoring method on basis of Symphony system Download PDF

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CN102495607A
CN102495607A CN2011104256723A CN201110425672A CN102495607A CN 102495607 A CN102495607 A CN 102495607A CN 2011104256723 A CN2011104256723 A CN 2011104256723A CN 201110425672 A CN201110425672 A CN 201110425672A CN 102495607 A CN102495607 A CN 102495607A
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symphony
unit
line performance
generating unit
performance monitoring
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方彦军
韩玲
李昕
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Wuhan University WHU
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Abstract

The invention provides a fossil power unit on-line performance monitoring method on the basis of a Symphony system. The method provided by the invention comprises the following steps of: firstly, operating a sensor on the site by a fossil power unit to acquire data required by calculation of performances of the fossil power unit, such as the temperature, the pressure, the flow rate and the like; transmitting the acquired data into the Symphony DCS (Distributed Control System) system; executing a unit on-line performance monitoring program by a controller of the Symphony DCS system; reading data of a power plant by the unit on-line performance monitoring program; carrying out unit on-line performance calculation; after completing calculation, returning a calculation result to the controller; and with the reference to the calculation result, generating a thermal power plant control scheme by the controller. According to the method provided by the invention, a unit on-line performance calculation program is embedded into the Symphony DCS system and the unit can be subjected to on-line performance monitoring. The method has the characteristics of strong real-time performance, high transportability and low transplanting cost.

Description

Fired power generating unit on-line performance monitoring method based on the Symphony system
?
Technical field
The invention belongs to power plant units performance monitoring field, relate in particular to a kind of fired power generating unit on-line performance monitoring method based on the Symphony system.
Background technology
Along with deepening continuously of China's economic system reform, market is progressively moved towards in electric system, and implementation is separated the factory and network, the competition mechanism of surfing the Net at a competitive price.As the generating unit, its task no longer is to accomplish year generating index simply, but will be devoted to provide the electric energy of high-quality, low consumption.Improving heat-economy, reducing coal consumption is the main path that thermal power plant practices thrift primary energy.Performance computation system of power plant is treated on a small quantity results of property intuitively to the mass data of gathering through calculating the fired power generating unit performance index continuously, in time reflects the heat-economy that thermal power plant is required objectively, better guiding operation personnel work.
The domestic power plant units performance monitoring system of researching and developing mainly all is based on MIS (Management Information System at present; MIS) or SIS (Supervisory Information System in plant level, plant level supervisory information system) system realize.Through periodically data being gathered and stored, form the database of thermal power plant's operational factor based on the power plant units performance monitoring system of MIS, the staff can regularly take out data from database, carry out the fired power generating unit performance computation of off-line.These class methods stress the management to data, can't therefore can't obtain the on-line performance of power plant units at demand pairs according to handling.Based on the power plant units performance monitoring system of SIS is that the monitoring of collection process real-time, optimal control and production run management are the level of factory automatic information system of one.These class methods need add new control computer in thermal power plant in existing DCS (Distributed Control System, dcs) system, this has just changed the hardwire system of unit, and input ratio is bigger; And because plug-in PC (Personal Computer, personal computer) machine, data are imported into from DCS in the SIS system, and this has very big influence to the real-time of obtaining data, and then has reduced the real-time of total system; In addition, owing to the authority problem, can only carry out the unidirectional delivery of data between DCS system and the SIS system, promptly data can only be imported into the SIS system from the DCS system, and can't can't participate in the on-line optimization control of unit from the passback of SIS system.
Summary of the invention
To the problem that prior art exists, the invention provides high, real-time, portable high, the low fired power generating unit on-line performance monitoring method of transplanting cost of a kind of computational accuracy based on the Symphony system.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of fired power generating unit on-line performance monitoring method based on the Symphony system may further comprise the steps:
S1, on-the-spot boiler operating parameter and the steam turbine operation parameter of collection thermal power unit operation; Described boiler operating parameter comprises oxygen content in exhaust smoke, original coal ash part, unburned carbon in flue dust, exhaust gas temperature and environment temperature, and described steam turbine operation parameter comprises flow, temperature and pressure parameter;
S2, all kinds of parameters that step S1 is gathered transfer to Symphony DCS system through data line;
S3, the monitoring of fired power generating unit on-line performance, this step further comprises following substep:
The data that the controller of S3-1, Symphony DCS system is gathered from the public looped network read step S1 of Symphony DCS system;
S3-2, the data computation unit each several part operational efficiency and the coal consumption of being read according to the step S3-1 of institute, i.e. steam turbine steam consumption
Figure 2011104256723100002DEST_PATH_IMAGE002
, boiler efficiency , thermal power plant's heat consumption rate and thermal power plant's coa consumption rate ;
The result of calculation of S3-3, output step S3-2;
S4, the result of calculation of step S3 passed back to the controller of Symphony DCS system through the public looped network of Symphony DCS system.
Among the step S1; The flow of steam turbine operation, temperature and pressure parameter are obtained by sensor acquisition; Can adopt ASME model long-radius nozzle to gather flow parameter, adopt the ARTM series of temperatures to patrol and examine measurement and control instrument collecting temperature data, adopt RUEGER model pressure transducer to gather pressure data.
Among the step S2, the data that step S1 gathered are to transfer to Symphony DCS system through data line.
Before the step S3 also in steps: the controller of Symphony DCS system reads whether carry out fired power generating unit on-line performance monitored signal value s; Described signal value s is imported by operating personnel; Its value is for " 0 " or " 1 ", when signal value s be input as 0 the time, expression need not carried out the unit on-line performance and calculate; Then not execution in step S3, end at this point; When signal value s be input as 1 the time, expression need be carried out the unit on-line performance and calculates, then execution in step S3.
Between step S3-2 and the S3-3 also in steps: the numerical value of the thermal power plant's heat consumption rate
Figure 453910DEST_PATH_IMAGE006
that is calculated according to step S3-2 is judged whether safe operation of fired power generating unit; Safe operation in this way, then execution in step S3-3; Otherwise report to the police.
The controller model of above-mentioned Symphony DCS system is BRC300.
 
The present invention has the following advantages and good effect:
A kind of fired power generating unit on-line performance monitoring method of the present invention based on the Symphony system; The inventive method is when showing operating states of the units synchronously; Can also carry out exchanges data through looped network and DCS; The computer set on-line performance has computational accuracy height, real-time, portable height, transplants characteristics such as cost is low.
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method.
Embodiment
The inventive method is at first through the on-the-spot sensor acquisition fired power generating unit performance computation desired data of thermal power unit operation; Like temperature, pressure, flow etc., and image data transferred in the Symphony DCS system, the controller of Symphony DCS system is carried out unit on-line performance monitoring facilities; Unit on-line performance monitoring facilities reads power plant's data; And carry out the unit on-line performance and calculate, calculating passes back to controller with result of calculation after accomplishing; Controller reference calculation result produces thermal power plant's controlling schemes.The inventive method is embedded into unit on-line performance calculation procedure in the Symphony DCS system, can onlinely carry out performance monitoring to unit, has real-time, portable high, the low characteristics of transplanting cost.
Combine accompanying drawing that technical scheme advantage of the present invention is described further through embodiment below.
A kind of fired power generating unit on-line performance monitoring method that the present invention proposes based on the Symphony system, concrete steps are following:
S1, on-the-spot boiler operating parameter and the steam turbine operation parameter of collection thermal power unit operation; Described boiler parameter comprises oxygen content in exhaust smoke, original coal ash part, unburned carbon in flue dust, exhaust gas temperature and environment temperature; Described turbine parameters comprises flow, temperature and pressure; Wherein, flow comprises specified main steam flow, actual main steam flow, feedwater flow; Temperature comprises high outlet water temperature, No. 7 high outlet water temperature, No. 8 high extraction temperature, No. 8 high drain temperature, No. 6 high outlet water temperature, No. 7 high extraction temperature, No. 7 high drain temperature, main steam temperature, feed temperature, reheated steam hot arc temperature and cold section temperature of reheated steam of adding of adding of adding of adding of adding of adding of adding No. 8; Pressure comprises high outlet feed pressure, No. 7 high outlet feed pressure, No. 8 high extraction pressure, No. 8 high hydrophobic extraction pressure, No. 6 high outlet feed pressure, No. 7 high extraction pressure, No. 7 high hydrophobic extraction pressure, main steam pressure, feed pressure, reheater steam hot arc pressure, cold section pressure of reheated steam and boiler blow-off water pressures of adding of adding of adding of adding of adding of adding of adding No. 8.
This specific embodiment, boiler is for subcritical, the single reheat of ABB-CE company design, single drum, Control Circulation, single burner hearth, Π type are arranged in the open, four jiaos of two tangential firings, dry ash extraction coal-powder boiler.Steam turbine is subcritical resuperheat single shaft four cylinders of 660MW four exhaust condensing turbines that GEC ALSTHOM company produces.
Oxygen content in exhaust smoke during boiler operatiopn can adopt zirconia oxygen analyzer to measure; Original coal ash part can adopt LB420 ash content measuring instrument to measure; Unburned carbon in flue dust can adopt HTW type unburned carbon in flue dust on-line detector to measure; Exhaust gas temperature and environment temperature all adopt the ARTM series of temperatures to patrol and examine measurement and control instrument and measure.Flow during steam turbine operation adopts ASME model long-radius nozzle to measure, and the temperature during steam turbine operation adopts the ARTM series of temperatures to patrol and examine measurement and control instrument and measures, and the pressure during steam turbine operation adopts the pressure transducer of RUEGER model to measure.
S2, all kinds of parameters that step S1 is gathered transfer to Symphony DCS system through data line;
The controller of S3, Symphony DCS system reads whether carry out fired power generating unit on-line performance monitored signal value s; Described signal value s is imported by operating personnel; Its value is for " 0 " or " 1 ", when signal value s be input as 0 the time, expression need not carried out the unit on-line performance and calculate; Then not execution in step S3, end at this point; When signal value s be input as 1 the time, expression need be carried out the unit on-line performance and calculates, then execution in step S3; In this specific embodiment, the controller model of Symphony DCS system is BRC300.
S4, the monitoring of fired power generating unit on-line performance, this step further comprises following substep:
The data that the controller of S4-1, Symphony DCS system is gathered from the public looped network read step S1 of Symphony DCS system;
S4-2, the data computation unit each several part operational efficiency and the coal consumption of being read according to step S4-1, i.e. steam turbine steam consumption , boiler efficiency
Figure 854991DEST_PATH_IMAGE004
, power plant's heat consumption rate
Figure 991574DEST_PATH_IMAGE006
and power plant's coa consumption rate .
1) thermal loss of steam turbine amount adopts following formula to calculate:
Figure 2011104256723100002DEST_PATH_IMAGE010
?（1）
In the formula (1):
Figure 2011104256723100002DEST_PATH_IMAGE012
is main steam flow; Unit is: t/h is obtained by sensor acquisition;
Figure 2011104256723100002DEST_PATH_IMAGE014
is feedwater flow; Unit is: t/h is obtained by sensor acquisition;
Figure 2011104256723100002DEST_PATH_IMAGE016
is the main steam enthalpy; The main steam temperature and the main steam pressure that are recorded by sensor calculate, and unit is: kJ/kg;
Figure 2011104256723100002DEST_PATH_IMAGE018
is the feedwater enthalpy; The feed temperature and the feed pressure that are recorded by sensor calculate, and unit is: kJ/kg;
Figure 2011104256723100002DEST_PATH_IMAGE020
is reheater outlet steam enthalpy; It is intermediate pressure cylinder admission enthalpy; The reheated steam hot arc temperature and the reheater steam hot arc calculation of pressure that are recorded by sensor obtain, and unit is: kJ/kg;
Figure 2011104256723100002DEST_PATH_IMAGE022
is reheater inlet steam enthalpy; Promptly high row's steam enthalpy; Cold section temperature of reheated steam and cold section calculation of pressure of reheated steam of being recorded by sensor obtain, and unit is: kJ/kg;
Figure 2011104256723100002DEST_PATH_IMAGE024
is the boiler blowdown water enthalpy; The boiler blowdown water calculation of pressure that is recorded by sensor obtains, and unit is: kJ/kg;
is the reheated steam flow;
Figure 2011104256723100002DEST_PATH_IMAGE028
;
Figure 2011104256723100002DEST_PATH_IMAGE030
; is No. 8 high-pressure heater amounts of drawing gas, and unit is: t/h;
Figure 2011104256723100002DEST_PATH_IMAGE034
;
Figure 2011104256723100002DEST_PATH_IMAGE036
is No. 7 high-pressure heater amounts of drawing gas, and unit is: t/h;
Figure 2011104256723100002DEST_PATH_IMAGE038
highly adds the saliva enthalpy No. 8; Unit is: t/h records No. 8 high high outlet feed pressures that add of outlet water temperature and No. 8 that add by sensor and calculates;
Figure 2011104256723100002DEST_PATH_IMAGE040
highly adds the saliva enthalpy No. 7; Unit is: t/h records No. 7 high high outlet feed pressures that add of outlet water temperature and No. 7 that add by sensor and calculates;
Figure 2011104256723100002DEST_PATH_IMAGE042
is No. 8 high enthalpys that draw gas that add; Unit is: t/h records No. 8 by sensor and highly adds extraction temperature and No. 8 high extraction pressures that add calculate;
Figure 2011104256723100002DEST_PATH_IMAGE044
highly adds hydrophobic enthalpy No. 8; Unit is: t/h; Highly add drain temperature and No. 8 high vapour wall pressure that add calculate by No. 8; The vapour wall pressure here equals No. 8 and highly adds that 98%, No. 8 of extraction pressure is high to add drain temperature and No. 8 high extraction pressures that add can be obtained by sensor measurement;
Figure 2011104256723100002DEST_PATH_IMAGE046
highly adds the saliva enthalpy No. 6; Unit is: t/h records No. 6 high high outlet feed pressures that add of outlet water temperature and No. 6 that add by sensor and calculates;
Figure 2011104256723100002DEST_PATH_IMAGE048
highly adds hydrophobic enthalpy No. 7; Unit is: t/h; Highly add drain temperature and No. 7 high vapour wall pressure that add calculate by No. 7; The vapour wall pressure here equals No. 7 and highly adds that 98%, No. 7 of extraction pressure is high to add drain temperature and No. 7 high extraction pressures that add can be obtained by sensor measurement;
Figure 2011104256723100002DEST_PATH_IMAGE050
is No. 7 high enthalpys that draw gas that add; Promptly high row's steam enthalpy; Unit is: t/h records No. 7 by sensor and highly adds extraction temperature and No. 7 high extraction pressures that add calculate.
2) calculating of boiler efficiency
Figure 598026DEST_PATH_IMAGE004
adopts following formula to calculate:
Figure 2011104256723100002DEST_PATH_IMAGE052
（2）
In the formula (2),
;
Figure 2011104256723100002DEST_PATH_IMAGE056
is flue gas loss, and unit is: %; In the computing formula of :
Figure 2011104256723100002DEST_PATH_IMAGE058
,
Figure 2011104256723100002DEST_PATH_IMAGE060
, ,
Figure 2011104256723100002DEST_PATH_IMAGE064
are the intermediate variable of calculating ; ;
Figure 2011104256723100002DEST_PATH_IMAGE068
;
Figure 2011104256723100002DEST_PATH_IMAGE070
,
Figure 2011104256723100002DEST_PATH_IMAGE072
; is excess air coefficient;
Figure 2011104256723100002DEST_PATH_IMAGE076
;
Figure 2011104256723100002DEST_PATH_IMAGE078
is oxygen content in exhaust smoke; Unit is: % can be obtained by sensor measurement; is exhaust gas temperature; Unit is: ℃, can obtain by sensor measurement;
Figure 2011104256723100002DEST_PATH_IMAGE082
is environment temperature; Unit is: ℃, can obtain by sensor measurement;
Figure 2011104256723100002DEST_PATH_IMAGE084
is the fuel net calorific value; Unit is: kJ/kg; The different coals that boiler fuel adopted are all to there being different net calorific values; Can obtain the corresponding fuel net calorific value of coal that boiler adopts through consulting relevant standard, the setting value with the fuel net calorific value in this practical implementation is a definite value;
Figure 2011104256723100002DEST_PATH_IMAGE086
is loss of the inadequacy burning for chemistry mechanics reason; Unit is: %; For the coal-burning boiler in the fired power generating unit; As long as during boiler combustion be not unusual anoxic;
Figure 2011104256723100002DEST_PATH_IMAGE088
got in heat loss due to unburned gas and small in the present invention;
Figure 2011104256723100002DEST_PATH_IMAGE090
;
Figure 2011104256723100002DEST_PATH_IMAGE092
is unburned carbon loss, and unit is: %; In the computing formula of
Figure 866698DEST_PATH_IMAGE092
: is original coal ash part; Unit is: % is obtained by sensor measurement;
Figure 295274DEST_PATH_IMAGE084
is the fuel net calorific value; Unit is: kJ/kg; The different coals that boiler fuel adopted are all to there being different net calorific values; Can obtain the corresponding fuel net calorific value of coal that boiler adopts through consulting relevant standard, the setting value with the fuel net calorific value in this practical implementation is a definite value;
Figure 2011104256723100002DEST_PATH_IMAGE096
is unburned carbon in flue dust; Unit is: % is obtained by sensor measurement;
Figure 2011104256723100002DEST_PATH_IMAGE098
is boiler slag carbon content; Unit is: %; Boiler slag carbon content can be through gathering slag and utilizing calcination loss of weight method that the slag assay of being gathered is measured, and the setting value with boiler slag carbon content in this specific embodiment is a definite value; and
Figure 2011104256723100002DEST_PATH_IMAGE102
is respectively flying dust share and ash-retention efficiency; Unit is %; Generally speaking;
Figure 2011104256723100002DEST_PATH_IMAGE104
,
Figure 2011104256723100002DEST_PATH_IMAGE106
;
Figure 2011104256723100002DEST_PATH_IMAGE108
is radiation loss; Unit is: %, ; In the computing formula of
Figure 819665DEST_PATH_IMAGE108
:
Figure 2011104256723100002DEST_PATH_IMAGE112
is the radiation loss under the rated capacity; Unit is: %, and
Figure 400819DEST_PATH_IMAGE112
generally gets 0.326;
Figure 2011104256723100002DEST_PATH_IMAGE114
is the specified main steam flow of steam turbine in the fired power generating unit; Unit is: t/h, and manufacturer provides in product description by steam turbine;
Figure 860619DEST_PATH_IMAGE012
is actual main steam flow; Unit is: t/h is obtained by sensor measurement;
Figure 2011104256723100002DEST_PATH_IMAGE116
is the heat loss due to sensible heat in slag; Unit is: %,
Figure 2011104256723100002DEST_PATH_IMAGE118
among the present invention.
3) thermal power plant's heat consumption rate
Figure 776491DEST_PATH_IMAGE006
(unit is kJ/kwh) adopts following formula to calculate:
Figure 2011104256723100002DEST_PATH_IMAGE120
(3)
In the formula (3),
Figure 2011104256723100002DEST_PATH_IMAGE122
is pipeline efficient; Unit is: %; In this specific embodiment,
Figure 985799DEST_PATH_IMAGE122
gets 0.99;
Figure 483777DEST_PATH_IMAGE004
is boiler efficiency; Unit is: % is calculated by formula (2);
Figure 193107DEST_PATH_IMAGE002
is the thermal loss of steam turbine amount; Unit is: kJ/h is calculated by formula (1);
Figure 2011104256723100002DEST_PATH_IMAGE124
is generated output power, and unit is: Mw.
4) thermal power plant's coa consumption rate
Figure 330696DEST_PATH_IMAGE008
(unit is kg/kwh) adopts following formula to calculate:
Figure 2011104256723100002DEST_PATH_IMAGE126
（4）
In the formula (4),
Figure 150884DEST_PATH_IMAGE006
is thermal power plant's heat consumption rate; Unit is: kJ/kwh is calculated by formula (3);
is the fuel net calorific value; Unit is: kJ/kg; The different coals that boiler fuel adopted are all to there being different net calorific values; Can obtain the corresponding fuel net calorific value of coal that boiler adopts through consulting relevant standard, the setting value with the fuel net calorific value in this practical implementation is a definite value.
The numerical value of S4-3, thermal power plant's heat consumption rate
Figure 632867DEST_PATH_IMAGE006
of being calculated according to step S4-2 is judged whether safe operation of fired power generating unit; Safe operation in this way, then execution in step S3-5; Otherwise report to the police;
For different fired power generating unit, judge fired power generating unit whether the standard of safe operation have difference.Is example with the present invention with the 660MW unit; When thermal power plant's heat consumption rate
Figure 70802DEST_PATH_IMAGE006
is between 7900 ~ 9400, think that then fired power generating unit is safe operation; Otherwise, think that thermal power unit operation is dangerous.
S4-4, output result of calculation.
S5, the result of calculation of step S4 passed back to the controller of Symphony DCS system through the public looped network of Symphony DCS system; After the controller of Symphony DCS system receives the result of calculation of step S4; Can use it in the power plant units optimization control scheme; Produce thermal power plant's controlling schemes, or the operation instruction suggestion is provided for Symphony DCS system.

Claims (8)

1. the fired power generating unit on-line performance monitoring method based on the Symphony system is characterized in that, may further comprise the steps:
S1, on-the-spot boiler operating parameter and the steam turbine operation parameter of collection thermal power unit operation; Described boiler operating parameter comprises oxygen content in exhaust smoke, original coal ash part, unburned carbon in flue dust, exhaust gas temperature and environment temperature, and described steam turbine operation parameter comprises flow, temperature and pressure parameter;
S2, all kinds of parameters that step S1 is gathered transfer to Symphony DCS system through data line;
S3, the monitoring of fired power generating unit on-line performance, this step further comprises following substep:
The data that the controller of S3-1, Symphony DCS system is gathered from the public looped network read step S1 of Symphony DCS system;
S3-2, the data computation unit each several part operational efficiency and the coal consumption of being read according to step S3-1, i.e. steam turbine steam consumption , boiler efficiency
Figure 827324DEST_PATH_IMAGE002
, thermal power plant's heat consumption rate
Figure 2011104256723100001DEST_PATH_IMAGE003
and thermal power plant's coa consumption rate ;
The result of calculation of S3-3, output step S3-2;
S4, the result of calculation of step S3 passed back to the controller of Symphony DCS system through the public looped network of Symphony DCS system.
2. the fired power generating unit on-line performance monitoring method based on the Symphony system according to claim 1 is characterized in that: among the described step S1, the flow of steam turbine operation, temperature and pressure parameter are obtained by sensor acquisition.
3. the fired power generating unit on-line performance monitoring method based on the Symphony system according to claim 2; It is characterized in that: described flow adopts ASME model long-radius nozzle to gather; Temperature is patrolled and examined measurement and control instrument collection by the ARTM series of temperatures, and described pressure is gathered by RUEGER model pressure transducer.
4. the fired power generating unit on-line performance monitoring method based on the Symphony system according to claim 1 is characterized in that: among the described step S2, the data that step S1 gathered are to transfer to Symphony DCS system through data line.
5. the fired power generating unit on-line performance monitoring method based on the Symphony system according to claim 1 is characterized in that:
Before the described step S3 also in steps: the controller of Symphony DCS system reads whether carry out fired power generating unit on-line performance monitored signal value s.
6. the fired power generating unit on-line performance monitoring method based on the Symphony system according to claim 5, it is characterized in that: described signal value s is imported by operating personnel.
7. the fired power generating unit on-line performance monitoring method based on the Symphony system according to claim 1 is characterized in that:
Between described step S3-2 and the S3-3 also in steps: judge whether safe operation of fired power generating unit according to the numerical value of thermal power plant's heat consumption rate
Figure 126904DEST_PATH_IMAGE003
that said step S3-2 calculated; Safe operation in this way, then execution in step S3-3; Otherwise report to the police.
8. according to claim 1 or 5 described fired power generating unit on-line performance monitoring methods based on the Symphony system, it is characterized in that: the controller model of described Symphony DCS system is BRC300.
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CN103672953A (en) * 2013-12-27 2014-03-26 广东省粤电集团有限公司珠海发电厂 Self-adaptive control method and system of combustion of multiple types of coal of boiler
CN103726887A (en) * 2013-12-17 2014-04-16 上海交通大学 Method for online monitoring performance of steam turbine of coal-firing unit
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Application publication date: 20120613