CN104102209B - A kind of operation method of electric power system - Google Patents
A kind of operation method of electric power system Download PDFInfo
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- CN104102209B CN104102209B CN201410341546.3A CN201410341546A CN104102209B CN 104102209 B CN104102209 B CN 104102209B CN 201410341546 A CN201410341546 A CN 201410341546A CN 104102209 B CN104102209 B CN 104102209B
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- 238000013461 design Methods 0.000 claims abstract description 27
- 230000007613 environmental effect Effects 0.000 claims abstract description 9
- 239000003344 environmental pollutant Substances 0.000 claims description 19
- 231100000719 pollutant Toxicity 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 18
- 239000003245 coal Substances 0.000 claims description 14
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 12
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 11
- 238000011156 evaluation Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 7
- 239000003500 flue dust Substances 0.000 claims description 4
- 230000008439 repair process Effects 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 206010037660 Pyrexia Diseases 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 230000001172 regenerating effect Effects 0.000 claims 1
- 238000000605 extraction Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
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- 235000008434 ginseng Nutrition 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The present invention provides a kind of operation method of electric power system，Which includes that the parameter based on heat and power system all parts calculates the energy cost of heat and power system，Exhaust emissions based on heat and power system calculates the environmental costses of heat and power system，The actual motion expense of heat and power system is calculated using the energy cost and environmental costses，The actual motion expense of heat and power system compared with design and operation expense，If actual motion expense is higher by 5% than design and operation expense，Or it is more，Such as 10%，When 15%，Check the parameter of heat and power system all parts，The parameter of all parts compared with corresponding design parameter，If the parameter of all parts is not above the 5% of corresponding design parameter，Heat and power system is kept to continue to run with，If having at least one to exceed the 5% of corresponding design parameter in the parameter of all parts，So central controller transmits alarm signal to siren，And corresponding component and anomaly parameter are shown on the display unit，To remind staff to overhaul the part.
Description
Technical field
Invention is related to a kind of operation method of electric power system, especially designs a kind of heat and power system based on Economic Evaluation and transports
Row method.
Background technology
It is well known that problem of environmental pollution has become the major issue of restriction China economic development, the energy of China disappears
Fei Zhong, consumption of coal accounting are very high, particularly, China be with coal generate electricity based on country, annual coal for power generation accounts for China
The half of annual coal total amount.Coal-burning power plant also results in flue dust, sulfur dioxide, carbon dioxide, nitrogen oxygen while electric energy is produced
The massive discharge of pollutant such as compound and waste water.At present, coal-burning power plant often runs Jing as examination power plant using net coal consumption rate
The final index of Ji property, and net coal consumption rate does not consider that power plant is run to the pollution caused by environment, does not account for water yet
The problems such as use value of resource.As the implementation and power system of China's power plant for energy conservation Mitigation options are separated the factory and network, bid
The progressively enforcement of online measure, if still using traditional net coal consumption rate as performance assessment criteria, or as optimal power plant operation
And the quotation foundation of rate for incorporation into the power network, not only do not meet reality, nor the improvement of the improvement and pollutant beneficial to environment, so
A kind of new comprehensive evaluation index and new operation method should be sought, the performance driving economy of heat and power system is evaluated, and with this
Which runs to carry out dynamic adjustment, so as to accomplish that saving energy, lowering energy consumption and reducing pollutants discharge reduce pollution.
The content of the invention
The expense of heat and power system electrical energy production is divided into energy cost, non-energy expense and environmental hazard expense three
Point.Heat and power system production electric energy will consume fuel and water resource, here it is the energy cost part in thermoelectric power production；In order that
Heat and power system normally runs, it is necessary to have the wage of depreciation, maintenance, management and the personnel of Factory Building and equipment, bonus, welfare etc., this
It is exactly so-called non-energy expense；There are waste water, waste gas and waste residue to discharge in thermoelectric power production, constitute environmental pollution expense.
Energy cost part and the environmental pollution cost components of heat and power system are mainly considered in the present invention, and to this two
Expense is analyzed from the operational factor of heat and power system and is drawn, is evaluated.Invention major programme is as follows：
Scheme one：
A kind of operation method of electric power system, including：
The first step：Based on steam turbine internal power Wi, steam turbine absolute internal efficiency ηi, boiler thermal output ηb, pipeline efficiency
ηp, steam turbine mechanical efficiency ηmWith generator efficiency ηg, calculate plant thermal efficiency ηcp, wherein：
In formula：WiFor steam turbine internal power, KJ/h；Dj、DcRegenerative steam flows respectively at different levels, aerofluxuss condenser it is solidifying
Throughput, kg/h；Δhj、ΔhcThe actual enthalpy drops of stream, condensing stream in steam turbine that draw gas respectively at different levels, Kj/kg；Z is backheat
Draw gas series；
In formula：Q0For the heat consumption of steam turbine, KJ/h；
ηcp=ηbηpηiηmηg
In formula：ηbFor boiler thermal output, ηpFor pipeline efficiency, ηmFor steam turbine mechanical efficiency, ηgFor generator efficiency；
Second step：Full factory's coal consumption amount B is calculated based on plant thermal efficiency, and the energy expense of fuel is calculated according to stock coal price
Use C1：
In formula：PeFor the electrical power of Turbo-generator Set, kW；QNet, arFor the low heat valve of heat and power system coal, kJ/
kg；
3rd step：The emission behaviour of the flue dust, sulfur dioxide and nitrogen oxides of on-line real time monitoring smoke evacuation tail gas, it is determined that row
The major pollutants content of cigarette tail gas, and blowdown is calculated with collecting standard according to the content and charges for disposing pollutants of these major pollutants
Expense C2；
4th step：Integrated environment evaluation index D of heat and power system is determined with following formula：
5th step：Judge the environmental economy implementations of heat and power system operation, when D values are more than first predetermined value, judge this
When heat and power system operate in during the design and operation expense, in uneconomical and not environmentally state；
6th step：Boiler, pipe network and pump, superheater or reheater, steam turbine, electromotor, condenser are checked item by item or are changed
The operational factor of the projects such as hot device, economizer, tail gas treatment device and tail gas, by the design load tabled look-up with corresponding parameter or goes through
History reference value is compared, if not having the preset percentage for having beyond design load or history reference value in these operational factors
More than value, heat and power system is kept normally to run；If the operational parameter value of presence at least one is beyond design in these parameters
More than the preset percentage value of value or history reference value, then relevant parameter is shown in display unit and is sent to alarm
Alarm signal, reminds staff to note the state of associated components, and online or maintenance down or replacing exception or damage part.
7th step：After in line or maintenance down or replacing exception or damage part, initially enter down from the first step again
One circulation.
Scheme two：
According to the design load of the operation method of the electric power system of scheme 1, described integrated environment evaluation index D and each parameter
Or the preset percentage value of history reference value can be adjusted setting according to the area different to environmental requirement, if to environment
Require strictly can above-mentioned numerical value arrange it is lower, if to environmental requirement loosely can above-mentioned numerical value setting height a bit with
The sensitivity of reduction system.
Scheme three：
According to the operation method of the electric power system of scheme 1, before next circulation is entered, in central control memory
Add up maintenance number of times in record maintenance part and record of examination enumerator and add 1.
Scheme four
According to the operation method of the electric power system of scheme 1, maintenance therein includes the maintenance during on-bne repair and overhaul.
Scheme five
According to the operation method of the electric power system of scheme 1, wherein can be to environmental evaluation index D and the design load of each parameter
Or the deviation range of the preset percentage value of history value is manually arranged, for example, it is set to 10%, 15% etc..
Additionally, at present, thermal power plant's exhaust emission mainly imposes sulfur dioxide (SO2), nitrogen oxides (NOx) and flue dust 3
Charges for disposing pollutants.Ash flushing water pollution is main to impose float (SS), 3 charges for disposing pollutants of COD (COD) and total arsenic.Charges for disposing pollutants are pressed
Calculated with pollutional equivalent according to the species, quantity for discharging pollutants and imposed, according to The Ministry of Finance of the People's Republic of China, MOF and National Environmental
Protection general bureau formulates《Collection of drainage dues standard and computational methods》Carry out pollutant expense calculating, and various pollutant is every
Equivalents expenses standard can be with the regulation of foundation local laws and regulations in being input into by way of parameter setting before system start-up
Centre controller.
The equivalents of the pollution charges use=pollutant of certain pollutant × per equivalents expenses standard.
The equivalents of air pollution emission thing is mainly considered in the present invention, if necessary or if possible can also be by
The major pollutants of water pollution account for scope.
Description of the drawings
Fig. 1 is typical heat and power system crew qiting figure；
Fig. 2 is heat and power system system cost balance chart；
Fig. 3 is that heat and power system actual motion expense evaluates control system figure；
Fig. 4 is that heat and power system actual motion expense is evaluated and runs block diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with the accompanying drawings to present invention enforcement
Example is described in further detail.Here, the schematic description and description of the present invention is used to explain the present invention, but it is not intended as
Limitation of the invention.
The present embodiment is a kind of operation method of steam power plant, it should be pointed out that the present embodiment is as this using steam power plant
A kind of specific embodiment of heat and power system in invention.
Fig. 1 represents the steam power plant 1 including some turbine sections, and they are directed to different pressure designs.These turbine sections
It is arranged on common axle 5 in series.
In order to run, water is heated in steam boiler 7 and produces steam by live steam superheater 9.Superheated steam is used as work
Make steam and high-pressure turbine section 13 is introduced by pipeline, steam there expands.After expanding in high-pressure turbine section 13, part
Steam introduces reheater 15 by the first cross over pipe 14, there reheats, and then introduces double-flow middle-pressure steam turbine section 17
In.Steam is reexpanded here, until regulation, present relatively low stress level.
Then, the steam of lower pressure levels is expanded in middle-pressure steam turbine section 17, by the second cross over pipe for connecting
During 21 are introduced into and be equally double-flow low-pressure turbine section 25.
The electromotor 29 for producing electric current is driven by public axle 5.Low-pressure turbine section 25 is left after expansion and cooling
Steam is flowed in condenser 31, and it is there condensed by heat is passed to surrounding, and the water as liquid is gathered up
Come.By condensate pump 33 and preheater 35, by water intermediate storage in feed-tank 37, then supplied by feed pump 39 again
Steam boiler 7.Wherein preheater 35 can be economizer, Jing after exhaust ventilation recycling and waste gas treatment equipment that boiler flows out
Discharge from chimney 71.
After expansion stages, extraction steam pipe 41 after 13 expansion stages of high-pressure turbine section, exactly by flow technique in reheating
Before device 15, it is connected with high-pressure turbine section 13.It is in high pressure required for customer 49 from system extraction by this extraction steam pipe 41
Steam after expanding in turbine section 13.
Extraction steam pipe 41 import expansion apparatuss 43 in, expansion apparatuss thus be connected with high-pressure turbine section 13.Expansion apparatuss 43 are designed as
Single expansion turbine 44, the second electromotor 45 are attached thereto.The steam of extraction is total system inside expansion turbine 44
Acting, perfect condition are expanded into 49 desired level of customer (pressure, temperature).Replace electromotor, it is also possible to arrange or connect
Applicable mechanical energy consumption device.
Factory steam Jing after expansion industrial steam pipe 47 is further introduced directly into into customer 49 from expansion turbine 44.
It is for example designed as fuel treating equipment or is designed as flue gas processing device.Individually expansion turbine 44 is used in back pressure fortune
OK.In this case, the factory steam pressure required for the final state point in expansion is directly corresponded to as far as possible, thus it is swollen
The customer 49 that swollen steam turbine 44 preferably connects provides the pressure and temperature level for needing.
Additionally, optionally the heat supply of steam power plant reclaims heat not only from the condensation in exhaust steam in steam turbine, it is also possible to
Come from steam turbine intergrade to draw gas or directly enter heat exchanger with to heat supply network heat supply from the steam of boiler extraction.Shown in Fig. 1
Example in only condensed to heat supply network heat supply from exhaust steam.
Fig. 2 is steam power plant's system cost balance chart.As can be seen from the figure the expense input of Hazards in Power Plant is predominantly used
201 expenses and the operating cost 202 for steam power plant's day-to-day operation are input in the fuel of fuel cost, the capital cost of output can
204 expenses, electric energy 205 expenses of output and blowdown 206 expenses of output are exported to be divided into heat.Certainly here, described input and
Output is that considering, and substantial, fuel input expense, operating cost, blowdown output expense are required for from the angle of energy stream
Outwards pay expense to realize, these projects are negative incomes, be cost-effectivenes expenditure；And heat output expense and electric energy output expense are
Steam power plant powers to electrical network and the launch return property income obtained by heat supply network heat supply, accrued just to take in.
Fig. 3 is that steam power plant's actual motion expense evaluates control system schematic diagram.Central controller 303 receive from boiler 7,
Pipe network and pump, superheater 9, steam turbine 13,17,25, electromotor 29, condenser 31, economizer 35, tail gas treatment device 49, tail
Parameter of the sensor of gas etc. to these part detection gained, central controller is processed to these parameters, and calculates heat
The actual motion expense of power plant, is then compared with actual motion expense and design and operation expense, when actual motion expense
When numerical value is higher than the 5% of design and operation expense, the parameter of all parts is compared one by one and judged, poor efficiency or damage is found out
Bad part, and corresponding component and corresponding parameter are included, on display unit 205, sending alarm signal to siren 304,
Siren is reported to the police, and reminds staff to be overhauled and safeguarded.
Additionally, central controller receives the input of external stability parameter, such as design data parameter typing 301 and such as coal
Other settings 302 that the data of matter parameter etc. are arranged.
Fig. 4 is that steam power plant's actual motion expense is evaluated and runs block diagram, the In-put design ginseng first on central controller
Count and Initialize installation 401 is carried out to system, then under the control of central controller, the collection from each part is read distal end and passed
Sensor measurement parameter 402：Including coal-supplying amount, bed drain purge, deslagging temperature, boiler feed temperature, main steam enthalpy, reheated steam enthalpy,
Extraction temperature, extraction pressure, exhaust enthalpy of turbine, heat exchanger heat exchange amount, condenser heat exchange amount, each pipeline pressure and crushing, send out
Motor speed, generator power, exhaust temperature, tail gas humidity, tail gas contain amount of sulfur dioxide, tail gas nitrogen-containing oxide amount, tail gas
Fume amount etc.；After above-mentioned data have been gathered, central controller calculates steam power plant's energy cost and steam power plant's ring based on data
Border expense 403；Steam power plant actual motion expense 404 is calculated again, and thermoelectricity is calculated according to the actual motion expense of steam power plant
The integrated environment evaluation index of factory；Compare steam power plant's actual motion expense using actual integrated environment evaluation index with design
Operating cost 405；The departure degree of actual motion expense and design and operation expense is judged in the 406th step, actual motion expense is seen
With whether more than the 5% of design and operation expense；If actual motion expense is greater than the 5% of design and operation expense, run
Unusual condition judges；The parameter of steam power plant all parts is checked in the 407th step, the parameter of all parts with it is corresponding
Design parameter compares, and sees whether actual parameter deviates from design parameter more than 5%；In the 408th step, anomaly parameter is found out,
Relevant parameter is shown in display unit and alarm signal is sent to alarm；In the 409th step, online or maintenance down or
Change abnormal or damage part；Steam power plant's operation is kept otherwise.
It is understood that those skilled in the art can be modified setting, example to the departure degree of above-mentioned index
Can such as be 5%, or 10%, 15% etc., complete in the Initialize installation that these settings can be in step 401.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention is by claims and its is equal to limit.
Claims (3)
1. a kind of operation method of electric power system, including：
The first step：Based on steam turbine internal power Wi, steam turbine absolute internal efficiency ηi, boiler thermal output ηb, pipeline efficiency etap, steamer
Machine mechanical efficiency ηmWith generator efficiency ηg, calculate plant thermal efficiency ηcp, wherein：
In formula：WiFor steam turbine internal power, KJ/h；Dj、DcRegenerative steam flows respectively at different levels, the solidifying air-flow of aerofluxuss condenser
Amount, kg/h；Δhj、ΔhcThe actual enthalpy drops of stream, condensing stream in steam turbine that draw gas respectively at different levels, Kj/kg；Z is regenerative steam
Series；
In formula：Q0For the heat consumption of steam turbine, KJ/h；
ηcp=ηbηpηiηmηg
In formula：ηbFor boiler thermal output, ηpFor pipeline efficiency, ηmFor steam turbine mechanical efficiency, ηgFor generator efficiency；
Second step：Full factory's coal consumption amount B is calculated based on plant thermal efficiency, and the energy cost C of fuel is calculated according to stock coal price1：
In formula：PeFor the electrical power of Turbo-generator Set, kW；QNet, arFor the low heat valve of heat and power system coal, kJ/kg；
3rd step：The emission behaviour of the flue dust, sulfur dioxide and nitrogen oxides of on-line real time monitoring smoke evacuation tail gas, it is determined that smoke evacuation tail
The major pollutants content of gas, and charges for disposing pollutants use is calculated with collecting standard according to the content and charges for disposing pollutants of these major pollutants
C2；
4th step：Integrated environment evaluation index D of heat and power system is determined with following formula：
5th step：Judge the environmental economy implementations of heat and power system operation, when D values are more than first predetermined value, judge this intermittent fever
Electric system is operated in during the design and operation expense, in uneconomical and not environmentally state；
6th step：Check item by item boiler, pipe network and pump, superheater or reheater, steam turbine, electromotor, condenser or heat exchanger,
The operational factor of economizer, tail gas treatment device and tail gas, is entered by the design load or history reference value tabled look-up with corresponding parameter
Row compares, if not having the presence of more than the preset percentage value for exceeding design load or history reference value in these operational factors, protects
Hold heat and power system normally to run；If the operational parameter value for having at least one in these parameters is joined beyond design load or history
Examine more than the preset percentage value of value, then relevant parameter is shown in display unit and alarm signal is sent to alarm,
Remind staff to note the state of associated components, and exceptional part is overhauled；
7th step：After maintenance, next circulation is initially entered from the first step again.
2. the operation method of electric power system according to claim 1, before next circulation is entered, in central control memory
Add up maintenance number of times in middle record maintenance part and record of examination enumerator and add 1.
3. the operation method of electric power system according to claim 1, maintenance therein include the inspection during on-bne repair and overhaul
Repair.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002051465A (en) * | 2000-07-27 | 2002-02-15 | Toshiba Corp | Power supply method, power system controller and memory medium |
| CN102217163A (en) * | 2008-11-14 | 2011-10-12 | 丰田自动车株式会社 | Contactless power supply system and conrol method thereof |
| CN102541248A (en) * | 2012-02-22 | 2012-07-04 | 浪潮电子信息产业股份有限公司 | Method for dynamically adjusting power supply efficiency in cloud computing industry by means of centralization |
| CN102749982A (en) * | 2012-06-29 | 2012-10-24 | 浪潮电子信息产业股份有限公司 | Design method for improving power supply efficiency of power supply system with multiple groups of power sources |
| CN102957169A (en) * | 2011-08-16 | 2013-03-06 | 硕天科技股份有限公司 | Uninterruptible power supply system with improved conversion efficiency of power supply |
-
2014
- 2014-07-16 CN CN201410341546.3A patent/CN104102209B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002051465A (en) * | 2000-07-27 | 2002-02-15 | Toshiba Corp | Power supply method, power system controller and memory medium |
| CN102217163A (en) * | 2008-11-14 | 2011-10-12 | 丰田自动车株式会社 | Contactless power supply system and conrol method thereof |
| CN102957169A (en) * | 2011-08-16 | 2013-03-06 | 硕天科技股份有限公司 | Uninterruptible power supply system with improved conversion efficiency of power supply |
| CN102541248A (en) * | 2012-02-22 | 2012-07-04 | 浪潮电子信息产业股份有限公司 | Method for dynamically adjusting power supply efficiency in cloud computing industry by means of centralization |
| CN102749982A (en) * | 2012-06-29 | 2012-10-24 | 浪潮电子信息产业股份有限公司 | Design method for improving power supply efficiency of power supply system with multiple groups of power sources |
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