CN108023360A - Avoided the peak hour and the participation peak load regulation network steam power plant of heat supply network heat accumulation and peak regulating method based on thermoelectricity - Google Patents
Avoided the peak hour and the participation peak load regulation network steam power plant of heat supply network heat accumulation and peak regulating method based on thermoelectricity Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
The present invention discloses a kind of participation peak load regulation network steam power plant to avoid the peak hour based on thermoelectricity with heat supply network heat accumulation.Steam power plant is made of superheated steam boiler, pumping back of the body formula steam turbine, generator, steam feed pump, oxygen-eliminating device, one/No. bis- high-pressure heater, axle envelope/moisturizing heater, medium/low pressure heat supply main pipe, medium/low pressure Vaporized temperature-reducing device, steam power plant's monitoring peak regulation center.Steam power plant, using the limited peak modulation capacity of machine stove, is avoided the peak hour based on thermoelectricity on the basis of thermic load is met and participates in peak load regulation network；By the heat accumulation characteristic of heat supply network, coupled thermomechanics relation is pulled open, implements the further peak regulation of power grid." electricity determining by heat " pattern is changed into thermoelectricity coodination modes and is avoided the peak hour and heat supply network heat accumulation characteristic participation peak load regulation network based on thermoelectricity；Help to alleviate the scarcity for saving and adjusting peak load regulation network capacity.Avoided the peak hour the participation peak load regulation network steam power plant with heat supply network heat accumulation based on thermoelectricity, base oneself upon existing equipment, follow existing procedure；Without secondary equipment investment, secondary staff training.
Description
Technical field
The invention belongs to the technology category of cogeneration of heat and power；The industrial heat user towards industry cluster district is particularly related to, based on heat
The heat accumulation of avoid the peak hour load and the heat supply network of electricity, participates in steam power plant and the peak regulating method of peak load regulation network.
Background technology
The endowment of resources in China's " rich coal, oil-poor, few gas ", will maintain the power generation based on coal within the foreseeable time
Mode.The sustainable development of production of energy consumption, depends on the exploitation of the renewable low-carbon energy of supply side；Also Demand-side is looked forward to
High-efficiency low-pollution technology.Under the conditions of the prior art, boiler, steam turbine, efficiency >=94.8% of generator, 90%, 99%；It is comprehensive
Efficiency >=84.4%.Traditional thermoelectricity is because of " cold source energy ", actual comprehensive energy efficiency≤45%.
The Advanced Idea that cogeneration of heat and power is utilized based on thermal energy step, is a kind of high energy efficiency producer for taking into account electric energy and thermal energy
Formula：High-grade heat energy power-generating, low grade heat energy heat supply；Therefore, " cold source energy " of thermoelectricity is eventually into overblown blossoms；Thermoelectricity integrates energy
Imitate ≈ 85%, 25 yuan/GJ of heat cost ≈ (fire coal >=60 yuan/GJ, natural gas >=96 yuan/GJ).With new energy and steam power plant
Operation successively, the peak-valley difference of network load continues to increase, and peak regulation is extremely difficult." three Norths " area power grid is based on coal electricity, heat
Electricity accounting in coal unit is big, and hydroelectric resources is deficient.Night in winter is space heating load peak, electric load low ebb；Thermocouple
It is high that conjunction causes electricity to be contributed, and TV university is sent out to the wind；Be difficult to find protect heat supply, protect power grid security and protect new energy consumption it is perfectly sound it
Plan.2015, " three Norths ", which abandons wind and abandon optical quantum, surpassed 30,000,000,000 kW-h；67%, which abandons wind, appears in heating period, wherein 80% again concentrate it is low
Gu Shi.
Numerous scholars base oneself upon " three Norths " steam power plant, propose to participate in the solution of peak load regulation network, the core concept of scheme is
Thermoelectricity decouples；Particular technique means have four：Heat-accumulator tank, electric heat storage boiler or heat pump are configured, the heat supply of main steam pressure and temperature reducing, take out and coagulate
Back of the body machine.Other such as peak regulation heating boiler, Gas-steam Combined Cycle regulating units, its thought marrow or thermoelectricity decoupling.The former
The tune peak bottom bidirectional modulation of thermoelectricity is positioned, the latter is single Heating Adjustment.Above-mentioned " scheme " obtains Local advancement, but lacks
The successful case of large-scale engineering.
" east " area steam power plant is different from " three Norths ".First, user is different；The cogeneration of heat and power machine on the ground such as Zhejiang, Guangdong
Group, service object are substantially the enterprise of industry cluster district.Secondly, the similar production technology of industry cluster district enterprise determines to supply physochlaina infudibularis
Number and load.On the other hand, the peak regulation predicament of Zhejiang power grid goes even farther compared with " three Norths "；Therefore Zhejiang steam power plant participates in electricity
The necessity of net peak regulation is insolently " three Norths ".If Initial stages for reform and opening-up electric power notch is big, the unspoken words in a play intension of peak regulation is to improve
Power grid peak value；So so-called peak regulation today, more refers to lower power grid valley --- vacates and disappears to new energy such as wind, light, tides
Receive space.
Regulated power supply (water/thermoelectricity) ratio declines year by year in Zhejiang Province：2010 80%, 2015 63%, the year two thousand twenty≤
51%；Zhejiang future power supply to send a telegram here outside area, area's kernel, wind, light, based on tide-electricity, not developing deeply routine coal electricity.Zhejiang power grid
It is one of the receiving end power grid of " transferring electricity from the west to the east ", extra-high voltage uses " straight line " or " anti-tune peak " dispatch pattern of sending end surplus,
The low ebb peak regulation pressure of receiving end Zhejiang power grid is aggravated.The year two thousand twenty, Zhejiang " three hand over " and " three is straight " extra-high voltage are built up, extra-high voltage
Drop point covering Zhejiang is whole, by 37,000,000 kilowatts of electric energy power outside the area of Zhejiang, accounts for power grid system and adjusts load 40%；The year two thousand twenty, Zhejiang wind
10,000,000 kilowatts of Denso machine, 15,000,000 kilowatts of photovoltaic.Obviously, the ratio of Zhejiang regulated power supply will continue to decline, and save what net system was adjusted
Peak regulation operation " Alexandria ", the pressure that especially low ebb peak regulation faces, the predicament of this and " three Norths " power grid are reached the same goal by different routes.Consider
The economy and security of nuclear power, basic load operation are industrial practice；Zhejiang power grid Playing Pipa on the Back under peak regulation pressure, first of China
Three nuclear powers of the third generation, by " 15-1-7-1 ", (15h bases lotus, 1h are adjusted downward to 50% base lotus, 7h50% bases to phase in longevity leading portion 90%
Base lotus is recalled on lotus, 1h) operation -- participate in power grid low ebb peak regulation.At present, ripe two-way peak regulation is hydroenergy storage station；2020
Year, save water-storage and plan 7,500,000 kilowatts；Something lost is shaken, and only long 2,100,000 kilowatts of Longshan goes into operation.Tianhuangping Pumped storage Power Plant
Peak capacity 3690MW, generating power and pumping water starts 2820~3751 times, about 2 times/platform day within 2006~2014 years；Run time
12787~14965h, 5.8~6.8h/ platform day；One of the most busy power station in the whole world, without.
In December, 2015, Zhejiang power grid system adjust 58,410,000 kW of maximum power consumption load, and system adjusts maximum peak-valley difference 2217kW, year
Maximum peak-valley ratio 0.47；The year two thousand twenty, year largest anticipated peak-valley ratio >=52%.
The achievement that " three Norths " steam power plant participates in peak load regulation network is used for reference, with reference to the characteristics of the steam power plant of Zhejiang, design peak regulation solves
Scheme.Heat-accumulator tank is configured, is related to extra place investment and the complication of heating system；The electric heat storage boiler of configuration, Pekinese's electricity
For coal for Zhejiang it is excessively luxurious；The heat supply of main steam pressure and temperature reducing, extraction condensing back pressure machine, are tied by boiler, steam turbine, generator
Structure, material, thermal technology's mechanism restrict, and cost is high, adjustable extent is limited.Therefore, " three Norths " achievement, dead end are cloned totally；
But the thought elite that the decoupling of " three Norths " thermoelectricity carries out peak regulation is precious.Zhejiang steam power plant service industry accumulation regions enterprise, enterprise
Production technology it is similar；Therefore the thermic load of cogeneration units adjusts the electric load of power grid often to there is phenomenon of avoiding the peak hour, thermoelectricity with saving
" avoiding the peak hour " of load creates excellent condition to peak load regulation network.In addition, steam power plant mostly need to the pipeline through more than ten kilometers,
To user's heat supply in the form of medium/low pressure steam, and the thermal parameter of steam allows to fluctuate within the specific limits；Profit
With the thermal inertia of heating network, heat lag, implement peak load regulation network by the heat accumulation characteristic of heat supply network.Steam power plant participates in peak load regulation network
More representational intellectual property Summary on research results is as follows：
Patent of invention " a kind of regulating peak of electric power method and its device " (ZL00134616.4), proposes
It is poor by supply and demand of the storage heater balance caused by cogeneration units participate in electric peak regulating operation between heating, cooling load
It is different；" electricity determining by heat " operational mode is changed into electric peak regulating operation.
Patent of invention " the cogeneration type compressed-air energy-storage system and method for back pressure type thermoelectricity unit "
(ZL201510066753.7), the energy-storage system of cogeneration of heat and power combination adiabatic compression air is proposed, compressed air during low power consumption
Energy storage device, which compresses unnecessary electric energy, to be stored, compressed air expansion power generation during peak of power consumption.
Patent of invention " realizing that thermoelectricity unit participates in the method that peak-load regulating is dispatched using heat supply time lag " (application number
201511024034.5), propose to utilize heat supply time lag, on the premise of living needs is not influenced, solve thermoelectricity unit and do not join
With peak regulation or the small problem brought for peak load regulation network of participation peak capacity.
Patent of invention " thermoelectricity decoupling peak regulation system " (application number 201710481055.2), proposes to start electric boiler and follows
Ring hydro-thermal pump converts electrical energy into thermal energy and is sent into heat distribution pipe network, and consumption abandons wind and abandons light peak regulation power；Steam power plant can complete thermal electrolysis
Coupling, makes it possible that the pure condensate of steam power plant runs depth peak regulation.
Above-mentioned intellectual property achievement has reference value；But power grid tune is carried out according to the eastern region steam power plant such as Zhejiang feature
The exploration at peak is vacant, there is limitation；Therefore, it is necessary to make further innovative design.
The content of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of participation avoided the peak hour based on thermoelectricity with heat supply network heat accumulation
Peak load regulation network steam power plant and method.
Avoided the peak hour the participation peak load regulation network steam power plant with heat supply network heat accumulation based on thermoelectricity, it is characterised in that steam power plant is by superheated steam
Boiler, take out back of the body formula steam turbine, generator, steam feed pump, oxygen-eliminating device, No.1 high-pressure heater, No. two high-pressure heaters, axle envelopes
Heater, moisturizing heater, middle pressure heat supply main pipe, low pressure heat supply main pipe, middle pressure steam Desuperheating device, low-pressure steam desuperheat dress
Put, steam power plant's steam pipe line, steam power plant's water-supply line, steam power plant's monitoring peak regulation center composition, the model NG- of superheated steam boiler
500/10.1-M, takes out the model EHNG71/63/160 of back of the body formula steam turbine, model 50WX18Z-054LLT, the power of generator
50MW；Steam power plant's steam pipe line includes boiler to steam turbine pipeline, level-one steam extraction to middle pressure steam Desuperheating device pipeline, middle pressure and steams
Vapour Desuperheating device presses heat supply main pipe pipeline, two level steam extraction to No.1 high-pressure heater pipeline, three-level steam extraction to No. two high pressures to middle
Heater pipeline, steam turbine to steam feed pump pipeline, low-pressure steam Desuperheating device to low pressure heat supply main pipe pipeline, steam-operating feedwater
Pump to moisturizing heater pipeline, shaft-packing leakage to gland heater pipeline, steam turbine to low-pressure steam Desuperheating device pipeline；Thermoelectricity
Factory's water-supply line adds including chemical deionization water pot to gland heater pipeline, gland heater to moisturizing heater pipeline, moisturizing
Hot device is to oxygen-eliminating device pipeline, oxygen-eliminating device to steam feed pump pipeline, steam feed pump to No. two high-pressure heater pipelines, No. two height
Heater is pressed to No.1 high-pressure heater pipeline, No.1 high-pressure heater to superheated steam boiler pipeline, No.1 high-pressure heater
Heated to No. two high-pressure heater hydrophobic pipelines, No. two high-pressure heaters to oxygen-eliminating device hydrophobic pipeline, gland heater to moisturizing
Device hydrophobic pipeline, moisturizing heater to oxygen-eliminating device hydrophobic pipeline；
Superheated steam boiler drives electrical power generators through taking out back of the body formula steam turbine, the electric power access power grid that generator produces；Take out
Back of the body formula steam turbine is connected with steam feed pump, and gland heater is through moisturizing heater, oxygen-eliminating device, steam feed pump, No. two high pressures
Heater, No.1 high-pressure heater are connected with superheated steam boiler, and middle pressure heat supply main pipe is connected with middle pressure steam Desuperheating device, low
Pressure heat supply main pipe is connected with low-pressure steam Desuperheating device；Take out back of the body formula gas turbine exhaust gas to be divided into two, the steaming of low grade heat energy all the way
Vapour driving steam feed pump acting, there is provided the power of superheated steam boiler water supply system；Take out back of the body formula steam turbine and three-level steam extraction be set,
First order steam extraction adjusts steam parameter, the middle pressure steam thermal technology for exporting middle pressure steam Desuperheating device through middle pressure steam Desuperheating device
Parameter is up to standard and is middle pressure steam industrial user's heat supply by middle pressure heat supply main pipe, and second level steam extraction, third level steam extraction are heated
Hot steam boiler feedwater, takes out the another way of back of the body formula gas turbine exhaust gas, adjusts steam parameter through low-pressure steam Desuperheating device, makes low pressure
Vaporized temperature-reducing device output low-pressure steam thermal parameter it is up to standard, by low pressure heat supply main pipe for low-pressure steam industrial user confession
Heat；Middle pressure heat supply main-piping pressure 2.6-3.0Mpa, 280-300 DEG C of temperature, low pressure heat supply main-piping pressure 0.68-0.84Mpa, temperature
250-280 DEG C of degree；The heat of steam power plant, electrical parameter, actuator state are accessed steam power plant and are supervised by sensor, transmitter, controller
Peak regulation center is controlled, steam power plant monitors peak regulation center and is connected with saving the system tune center of power grid；Steam power plant on the basis of thermic load is met,
Implement the peak load regulation network avoided the peak hour based on thermoelectricity；By heat supply network heat accumulation characteristic, implement the further peak regulation of power grid.
Being avoided the peak hour based on thermoelectricity for the steam power plant participates in peak load regulation network method, it is characterised in that the electric load of power grid and heat
The thermic load of power plant, which exists, avoids the peak hour, and steam power plant is on the basis of thermic load is met, using the limited peak modulation capacity of machine stove, based on thermoelectricity
Avoid the peak hour and participate in peak load regulation network；The electric load of power grid：The 8-22 point periods are peak loads, remaining period is valley load；Steam power plant
Thermic load：5-7 points and 17-20 point periods are valley loads, and 2-5 points and 12-17 point periods are middle duty values, remaining period
It is peak load；The heat of steam power plant, which is contributed, meets the thermic load of steam power plant, and steam power plant is avoided the peak hour based on thermoelectricity and participates in peak load regulation network：5-
7 periods, valley heat is contributed, valley electricity is contributed；The 7-8 point periods, peak heat is contributed, intermediate value electricity is contributed；8-12 point periods, peak value
Heat is contributed, peak value electricity is contributed；The 12-17 point periods, intermediate value heat is contributed, peak value electricity is contributed；The 17-20 point periods, valley heat contribute, in
Value electricity is contributed；The 20-22 point periods, peak heat is contributed, peak value electricity is contributed；The 22-2 point periods, peak heat is contributed, intermediate value electricity is contributed；
The 2-5 point periods, intermediate value heat is contributed, valley electricity is contributed；Steam power plant's variable body of " electricity determining by heat " is avoided the peak hour based on thermoelectricity and participates in power grid tune
The steam power plant at peak, that is, on the basis of meeting thermic load, steam power plant carries out two-way peak regulation to the peak load of power grid.
Being avoided the peak hour based on thermoelectricity for the steam power plant participates in peak load regulation network method with heat supply network heat accumulation, it is characterised in that in thermoelectricity
Avoid the peak hour on the basis of participating in peak load regulation network, thermoelectricity load coupled relation pulled open by heat supply network heat accumulation characteristic, implement power grid into one
Step peak, peak regulation period are 20-5 points, the valley peak regulation contributed by being superimposed electricity, electric output peak regulation stream during electric-net valley duty value
Journey is specific as follows：
(1) 20-22 point periods, temperature given value rise to T_middle_upper heat supply network heat accumulations from T_middle_lower
Gain of heat amount Q_MLtoMU, contributes, peak value electricity is contributed for peak heat at this time；
(2) 22-2 point periods, temperature given value are down to T_middle from T_middle_upper, and heat supply network heat accumulation subtracts Q_
MUtoM, hot output ＜ peak heats output, makes electric output ＜ intermediate values electricity contribute, lowers power grid valley at this time
(3) 2-5 point periods, temperature given value are down to T_middle_lower from T_middle, and heat supply network heat accumulation subtracts Q_
MtoML, at this time, hot output ＜ intermediate values heat contribute, and electric output ＜ valleies electricity is contributed, lower power grid valley；
Wherein, variable declaration is as follows：
Temperature temperature, T heat quantity of heat, Q
Specific heat capacity specific heat capacity, C mass Ms ass, M
Temperature upper limit T_upper
Lowest temperature T_lower
Temperature intermediate value T_middle=0.5 × (T_upper+T_lower)
Upper value T_middle_upper=0.5 × (T_middle+T_upper) in temperature
Lower value T_middle_lower=0.5 × (T_middle+T_lower) in temperature
Heat supply network heat accumulation heat supply network heat accumulation, H
Heat supply network heat accumulation HT_middle=C × M × (T_middle-T_lower) during temperature intermediate value
Heat supply network heat accumulation HT_middle_upper during upper value in temperature
=C × M × (T_middle_upper-T_lower)
Heat supply network heat accumulation HT_middle_lower during lower value in temperature
=C × M × (T_middle_lower-T_lower)
In temperature up to it is middle when quantity of heat storage Q_MUtoM=HT_middle-HT_middle_upper
In temperature under when quantity of heat storage Q_MtoML=HT_middle_lower-HT_middle
Quantity of heat storage Q_MLtoMU when upper in temperature
=HT_middle_upper-HT_middle_lower
Q_MLtoMU ＞ 0, Q_MUtoM ＜ 0, Q_MtoML ＜ 0
Algorithmic descriptions are as follows：
1. lowest temperature T_lower is on the basis of heat supply network heat accumulation
2. codomain T_middle_upper, T_middle, T_middle_lower of temperature given value
Pass through the change of temperature given value, the heat of adjusting heat supply network heat accumulation
3. temperature given value is by for thermally safe constraint
Thermic load peak value will enter peak value, temperature given value T_middle_upper
Thermic load valley will enter valley, temperature given value T_middle_lower
Thermic load intermediate value will enter intermediate value, temperature given value T_middle
Compared with prior art, the present invention have an advantageous effect in that：
Steam power plant is on the basis of thermic load is met；The successful case that nuclear power participates in power grid period peak regulation is used for reference, utilizes machine stove
Limited peak modulation capacity, based on thermoelectricity avoid the peak hour participate in power grid peak load two-way peak regulation.By heat supply network heat accumulation characteristic, heat is pulled open
The coupled relation of electric load, implements the further peak regulation of power grid.Steam power plant " electricity determining by heat " operational mode changes into thermoelectricity coordination
Operational mode -- avoided the peak hour and heat supply network heat accumulation characteristic based on thermoelectricity, participate in peak load regulation network, helped to alleviate to save and adjust peak load regulation network capacity
Scarcity.Avoided the peak hour the participation peak load regulation network steam power plant with heat supply network heat accumulation based on thermoelectricity, base oneself upon existing equipment, follow existing procedure；
Without secondary equipment investment, secondary staff training.
Brief description of the drawings
Fig. 1 is the participation peak load regulation network steam power plant functional block diagram avoided the peak hour based on thermoelectricity with heat supply network heat accumulation；
Fig. 2 is the electric load of X power grids and the thermic load curve map of steam power plant；
Fig. 3 is the electric load line chart of X power grids；
Fig. 4 is the thermic load line chart of steam power plant；
Fig. 5 is the hot output line chart of steam power plant；
Fig. 6 is the steam power plant's electricity output line chart avoided the peak hour based on thermoelectricity；
Fig. 7 is steam power plant's heat output line chart by heat supply network heat accumulation；
Fig. 8 is traditional steam power plant's electric heating characteristic pattern；
Fig. 9 is steam power plant's electric heating characteristic pattern by heat supply network heat accumulation.
Numbered in figure using three digit 1/2/3X X, 1/2/3 characterization equipment/steam/water, XX is sequence number
Steam pipe line, water pipeline, the power line of thick line characterization equipment are drawn in figure using dotted line, solid line, two point
101- superheated steam boilers, 102- back pressure turbines, 103- generators, 104- steam feed pumps,
105- oxygen-eliminating devices, 106- No.1 high-pressure heaters, No. bis- high-pressure heaters of 107-, 108- gland heaters,
109- moisturizing heaters, press heat supply main pipe in 111-, 112- low pressure heat supply main pipes,
121- middle pressure steam Desuperheating devices, 122- low-pressure steam Desuperheating devices；
200- boilers are to steam turbine pipeline, 201- level-ones steam extraction to middle pressure steam Desuperheating device pipeline,
202- middle pressure steams Desuperheating device presses heat supply main pipe pipeline to middle,
The steam extraction of 203- two levels is to No.1 high-pressure heater pipeline, 204- three-levels steam extraction to No. two high-pressure heater pipelines,
205- steam turbines are to steam feed pump pipeline, 206- low-pressure steams Desuperheating device to low pressure heat supply main pipe pipeline,
207- steam feed pumps to moisturizing heater pipeline,
208- shaft-packing leakages are to gland heater pipeline, 209- steam turbines to low-pressure steam Desuperheating device pipeline；
300- chemical deionizations water pot is to gland heater pipeline, 301- gland heaters to moisturizing heater pipeline,
302- moisturizings heater is to oxygen-eliminating device pipeline, 304- oxygen-eliminating devices to steam feed pump pipeline,
305- steam feed pumps to No. two high-pressure heater pipelines,
No. bis- high-pressure heaters of 306- to No.1 high-pressure heater pipeline,
307- No.1s high-pressure heater to superheated steam boiler pipeline,
308- No.1s high-pressure heater to No. two high-pressure heater hydrophobic pipelines,
No. bis- high-pressure heaters of 309- to oxygen-eliminating device hydrophobic pipeline,
321- gland heaters are to moisturizing heater condensate pipeline, 303- moisturizings heater to oxygen-eliminating device hydrophobic pipeline；
Embodiment
As shown in Figure 1, avoided the peak hour based on thermoelectricity with the participation peak load regulation network steam power plant of heat supply network heat accumulation by superheated steam boiler
101st, back of the body formula steam turbine 102, generator 103, steam feed pump 104, oxygen-eliminating device 105, No.1 high-pressure heater 106, two are taken out
High-pressure heater 107, gland heater 108, moisturizing heater 109, middle pressure heat supply main pipe 111, low pressure heat supply main pipe 112, in
Press Vaporized temperature-reducing device 121, low-pressure steam Desuperheating device 122, steam power plant's steam pipe line, steam power plant's water-supply line, steam power plant's prison
Control peak regulation center composition, the model NG-500/10.1-M of superheated steam boiler 101, the model of pumping back of the body formula steam turbine 102
EHNG71/63/160, model 50WX18Z-054LLT, the power 50MW of generator 103；Steam power plant's steam pipe line includes boiler extremely
Steam turbine pipeline 200, level-one steam extraction to middle pressure steam Desuperheating device pipeline 201, middle pressure steam Desuperheating device are female to middle pressure heat supply
Pipe pipeline 202, two level steam extraction to No.1 high-pressure heater pipeline 203, three-level steam extraction to No. two high-pressure heater pipelines 204, vapour
Turbine to steam feed pump pipeline 205, low-pressure steam Desuperheating device to low pressure heat supply main pipe pipeline 206, steam feed pump is extremely mended
Water heater pipeline 207, shaft-packing leakage to gland heater pipeline 208, steam turbine to low-pressure steam Desuperheating device pipeline 209；
Steam power plant's water-supply line includes chemical deionization water pot to gland heater pipeline 300, gland heater to moisturizing heater pipeline
301st, moisturizing heater is to oxygen-eliminating device pipeline 302, oxygen-eliminating device to steam feed pump pipeline 304, steam feed pump to No. two high pressures
305, No. two high-pressure heaters of heater pipeline are to No.1 high-pressure heater pipeline 306, No.1 high-pressure heater to superheated steam
Boiler pipeline 307, No.1 high-pressure heater to 308, No. two high-pressure heaters of No. two high-pressure heater hydrophobic pipelines to oxygen-eliminating device
Hydrophobic pipeline 309, gland heater to moisturizing heater condensate pipeline 321, moisturizing heater to oxygen-eliminating device hydrophobic pipeline 303；
Superheated steam boiler 101 drives generator 103 to generate electricity through taking out back of the body formula steam turbine 102, the electricity that generator 103 produces
Power accesses power grid；Back of the body formula steam turbine 102 is taken out with steam feed pump 104 to be connected, gland heater 108 through moisturizing heater 109,
Oxygen-eliminating device 105,104, No. two high-pressure heaters 107 of steam feed pump, No.1 high-pressure heater 106 and superheated steam boiler 101
It is connected, middle pressure heat supply main pipe 111 is connected with middle pressure steam Desuperheating device 121, and low pressure heat supply main pipe 112 is filled with low-pressure steam desuperheat
122 are put to be connected；Take out the exhaust of back of the body formula steam turbine 102 to be divided into two, the steam drive steam feed pump 104 of low grade heat energy is done all the way
Work(, there is provided the power of 101 water supply system of superheated steam boiler；Take out back of the body formula steam turbine 102 and three-level steam extraction, first order steam extraction warp are set
Middle pressure steam Desuperheating device 121 adjusts steam parameter, reaches the middle pressure steam thermal parameter of the output of middle pressure steam Desuperheating device 121
Mark and be middle pressure steam industrial user's heat supply by middle pressure heat supply main pipe 111, second level steam extraction, third level steam extraction heating overheat
Steam boiler 101 feeds water, and takes out the another way of the exhaust of back of the body formula steam turbine 102, steam ginseng is adjusted through low-pressure steam Desuperheating device 122
Number, make low-pressure steam Desuperheating device 122 export low-pressure steam thermal parameter it is up to standard, be low pressure by low pressure heat supply main pipe 112
Steam industrial user's heat supply；Middle pressure heat supply main-piping pressure 2.6-3.0Mpa, 280-300 DEG C of temperature, low pressure heat supply main-piping pressure
250-280 DEG C of 0.68-0.84Mpa, temperature；The heat of steam power plant, electrical parameter, actuator state pass through sensor, transmitter, control
Device access steam power plant's monitoring peak regulation center, steam power plant monitor peak regulation center and are connected with saving the system tune center of power grid；Steam power plant is full
On the basis of sufficient thermic load, implement the peak load regulation network avoided the peak hour based on thermoelectricity；By heat supply network heat accumulation characteristic, implement the further of power grid and adjust
Peak.
Illustrate 1：In view of the heat of steam power plant, electrical parameters detection, control technology are ripe, superheated steam boiler, take out back of the body formula steamer
Machine and generator category knowledge category；Therefore only refer to and not being unfolded in text.Consider the integrality of content, describe cogeneration of heat and power system
Steam power plant's structure of system；And electricity, heat, water, the relevant energy stream of water vapour, logistics.
As shown in figures 2-6, the thermic load of the electric load of X power grids and steam power plant exists and avoids the peak hour, and steam power plant is meeting thermic load
On the basis of, using the limited peak modulation capacity of machine stove, avoided the peak hour based on thermoelectricity and participate in peak load regulation network；The electric load of X power grids：During 8-22 points
Section is peak load, remaining period is valley load；The thermic load of steam power plant：5-7 points and 17-20 point periods are valley loads,
2-5 points and 12-17 point periods are middle duty values, remaining period is peak load；The heat of steam power plant, which is contributed, meets the heat of steam power plant
Load, steam power plant are avoided the peak hour based on thermoelectricity and participate in peak load regulation network：The 5-7 point periods, valley heat is contributed, valley electricity is contributed；During 7-8 points
Section, peak heat is contributed, intermediate value electricity is contributed；The 8-12 point periods, peak heat is contributed, peak value electricity is contributed；12-17 point periods, intermediate value heat
Contribute, peak value electricity is contributed；The 17-20 point periods, valley heat is contributed, intermediate value electricity is contributed；The 20-22 point periods, peak heat is contributed, peak value
Electricity is contributed；The 22-2 point periods, peak heat is contributed, intermediate value electricity is contributed；The 2-5 point periods, intermediate value heat is contributed, valley electricity is contributed；" with heat
Steam power plant's variable body of fixed electricity " is avoided the peak hour based on thermoelectricity participates in the steam power plant of peak load regulation network, that is, on the basis of meeting thermic load, steam power plant pair
The peak load of power grid carries out two-way peak regulation.
Superheated steam boiler, pumping back of the body formula steam turbine and generator are large time delay, large time constant for the steam power plant of core
Object, does not possess the ability of thermoelectricity load real time dynamic tracing substantially；Frequently adjusting device is contributed at the same time, can reduce equipment
Service life；Third, intrinsic coupled thermomechanics cause the peak modulation capacity of thermoelectricity brand-name computer stove relatively limited, can not realize at the same time peak/
Valley electricity is contributed and valley top value heat is contributed.Therefore, contribute in cogeneration units under the constraints of creep speed up and down, ginseng
The period peak regulation successful case of power grid sxemiquantitative is participated according to nuclear power, steam power plant is avoided the peak hour based on thermoelectricity participates in the period of power grid sxemiquantitative
Peak regulation.Without loss of generality, the electric load of X power grids is using idealization broken line form approximate description peak valley electric load；The heat of steam power plant
Load quotes the dsc data that supplies that X saves certain printing and dyeing industry cluster district, and thermic load is also using idealization broken line form description.
As Figure 7-9, steam power plant is avoided the peak hour based on thermoelectricity and participates in peak load regulation network with heat supply network heat accumulation：Avoided the peak hour participation based on thermoelectricity
On the basis of peak load regulation network, thermoelectricity load coupled relation is pulled open by heat supply network heat accumulation characteristic, implements the further peak regulation of power grid；Examine
Consider the terseness of statement and the importance of power grid low ebb peak regulation, the choosing period of time 20-5 of peak load regulation network is participated in based on heat supply network heat accumulation
Point.The valley peak regulation contributed by being superimposed electricity, electric output peak regulation flow during electric-net valley duty value are specific as follows：
(1) 20-22 point periods, temperature given value rise to T_middle_upper, heat supply network heat accumulation from T_middle_lower
Gain of heat amount Q_MLtoMU, contributes, peak value electricity is contributed for peak heat at this time；
(2) 22-2 point periods, temperature given value are down to T_middle from T_middle_upper, and heat supply network heat accumulation subtracts Q_
MUtoM, hot output ＜ peak heats output, makes electric output ＜ intermediate values electricity contribute, lowers power grid valley at this time；
(3) 2-5 point periods, temperature given value are down to T_middle_lower from T_middle, and heat supply network heat accumulation subtracts Q_
MtoML, at this time, hot output ＜ intermediate values heat contribute, and electric output ＜ valleies electricity is contributed, lower power grid valley；
The coupled relation of thermoelectricity load is pulled open by heat supply network heat accumulation characteristic, the electric heating characteristic pattern of thermoelectricity unit is overall to right avertence
Move；For the horizontal h of some heat supply, do not utilized such as using heat supply network heat accumulation peak regulation, the adjustable extent [Pe, Pf] of electricity output such as
The adjustable extent that heat supply network heat accumulation peak regulation, electricity are contributed expands to [Ph, Pm].
Wherein, variable declaration is as follows：
Temperature temperature, T heat quantity of heat, Q
Specific heat capacity specific heat capacity, C mass Ms ass, M
Temperature upper limit T_upper
Lowest temperature T_lower
Temperature intermediate value T_middle=0.5 × (T_upper+T_lower)
Upper value T_middle_upper=0.5 × (T_middle+T_upper) in temperature
Lower value T_middle_lower=0.5 × (T_middle+T_lower) in temperature
Heat supply network heat accumulation heat supply network heat accumulation, H
Heat supply network heat accumulation HT_middle=C × M × (T_middle-T_lower) during temperature intermediate value
Heat supply network heat accumulation HT_middle_upper during upper value in temperature
=C × M × (T_middle_upper-T_lower)
Heat supply network heat accumulation HT_middle_lower during lower value in temperature
=C × M × (T_middle_lower-T_lower)
In temperature up to it is middle when quantity of heat storage Q_MUtoM=HT_middle-HT_middle_upper
In temperature under when quantity of heat storage Q_MtoML=HT_middle_lower-HT_middle
Quantity of heat storage Q_MLtoMU when upper in temperature
=HT_middle_upper-HT_middle_lower
Q_MLtoMU ＞ 0, Q_MUtoM ＜ 0, Q_MtoML ＜ 0
Algorithmic descriptions are as follows：
1. on the basis of the heat supply network heat accumulation of lowest temperature T_lower
2. codomain T_middle_upper, T_middle, T_middle_lower of temperature given value
Pass through the change of temperature given value, the heat of adjusting heat supply network heat accumulation
3. temperature given value is by for thermally safe constraint
Thermic load peak value will enter peak value, temperature given value T_middle_upper
Thermic load valley will enter valley, temperature given value T_middle_lower
Thermic load intermediate value will enter intermediate value, temperature given value T_middle.
Claims (3)
1. a kind of participation peak load regulation network steam power plant to be avoided the peak hour based on thermoelectricity with heat supply network heat accumulation, it is characterised in that steam power plant is by overheating
Steam boiler (101), take out back of the body formula steam turbine (102), generator (103), steam feed pump (104), oxygen-eliminating device (105), No.1
High-pressure heater (106), No. two high-pressure heaters (107), gland heater (108), moisturizing heater (109), middle pressure heat supply
Main pipe (111), low pressure heat supply main pipe (112), middle pressure steam Desuperheating device (121), low-pressure steam Desuperheating device (122), thermoelectricity
Factory's steam pipe line, steam power plant's water-supply line, steam power plant's monitoring peak regulation center composition, the model NG- of superheated steam boiler (101)
500/10.1-M, takes out the model EHNG71/63/160, the model 50WX18Z- of generator (103) of back of the body formula steam turbine (102)
054LLT, power 50MW；Steam power plant's steam pipe line subtracts including boiler to steam turbine pipeline (200), level-one steam extraction to middle pressure steam
Warm device pipeline (201), middle pressure steam Desuperheating device to middle pressure heat supply main pipe pipeline (202), two level steam extraction to No.1 high pressure add
Hot device pipeline (203), three-level steam extraction to No. two high-pressure heater pipelines (204), steam turbine to steam feed pump pipeline (205),
Low-pressure steam Desuperheating device is to low pressure heat supply main pipe pipeline (206), steam feed pump to moisturizing heater pipeline (207), axle envelope
Gas leakage is to gland heater pipeline (208), steam turbine to low-pressure steam Desuperheating device pipeline (209)；Steam power plant's water-supply line bag
Chemical deionization water pot is included to gland heater pipeline (300), gland heater to moisturizing heater pipeline (301), moisturizing heating
Device is to oxygen-eliminating device pipeline (302), oxygen-eliminating device to steam feed pump pipeline (304), steam feed pump to No. two high-pressure heater pipes
Line (305), No. two high-pressure heaters to No.1 high-pressure heater pipeline (306), No.1 high-pressure heater to superheated steam boiler
Pipeline (307), No.1 high-pressure heater to No. two high-pressure heater hydrophobic pipelines (308), No. two high-pressure heaters to oxygen-eliminating device
Hydrophobic pipeline (309), gland heater to moisturizing heater condensate pipeline (321), moisturizing heater to oxygen-eliminating device hydrophobic pipeline
(303)。
Superheated steam boiler (101) drives generator (103) power generation through taking out back of the body formula steam turbine (102), what generator (103) produced
Electric power accesses power grid；Take out back of the body formula steam turbine (102) with steam feed pump (104) to be connected, gland heater (108) is heated through moisturizing
Device (109), oxygen-eliminating device (105), steam feed pump (104), No. two high-pressure heaters (107), No.1 high-pressure heater (106) with
Superheated steam boiler (101) is connected, and middle pressure heat supply main pipe (111) is connected with middle pressure steam Desuperheating device (121), and low pressure heat supply is female
Pipe (112) is connected with low-pressure steam Desuperheating device (122)；Take out back of the body formula steam turbine (102) exhaust to be divided into two, all the way low-grade heat
Steam drive steam feed pump (104) acting of energy, there is provided the power of superheated steam boiler (101) water supply system；Take out back of the body formula vapour
Turbine (102) sets three-level steam extraction, and first order steam extraction adjusts steam parameter through middle pressure steam Desuperheating device (121), steams middle pressure
The middle pressure steam thermal parameter of vapour Desuperheating device (121) output is up to standard and is middle pressure steam work by middle pressure heat supply main pipe (111)
Industry user's heat supply, second level steam extraction, third level steam extraction heating superheated steam boiler (101) feedwater, takes out back of the body formula steam turbine (102) row
The another way of gas, through low-pressure steam Desuperheating device (122) adjust steam parameter, make low-pressure steam Desuperheating device (122) export
Low-pressure steam thermal parameter is up to standard, is low-pressure steam industrial user's heat supply by low pressure heat supply main pipe (112)；Middle pressure heat supply main pipe
280-300 DEG C of pressure 2.6-3.0Mpa, temperature, low pressure heat supply main-piping pressure 0.68-0.84Mpa, 250-280 DEG C of temperature；Thermoelectricity
The heat of factory, electrical parameter, actuator state access steam power plant by sensor, transmitter, controller and monitor peak regulation center, steam power plant
Monitoring peak regulation center is connected with saving the system tune center of power grid；Steam power plant implements to avoid the peak hour based on thermoelectricity on the basis of thermic load is met
Peak load regulation network；By the heat accumulation characteristic of heat supply network, implement the further peak regulation of power grid.
2. a kind of avoided the peak hour using steam power plant as claimed in claim 1 based on thermoelectricity participates in peak load regulation network method, its feature exists
In in the presence of avoiding the peak hour, steam power plant utilizes having for machine stove on the basis of thermic load is met for the electric load of power grid and the thermic load of steam power plant
Peak modulation capacity is limited, is avoided the peak hour based on thermoelectricity and participates in peak load regulation network；The electric load of power grid：The 8-22 point periods are peak loads, remaining when
Section is valley load；The thermic load of steam power plant：5-7 points and 17-20 point periods are valley loads, and 2-5 points and 12-17 point periods be
Middle duty value, remaining period are peak loads；The heat of steam power plant, which is contributed, meets the thermic load of steam power plant, and it is wrong that steam power plant is based on thermoelectricity
Peak participates in peak load regulation network：The 5-7 point periods, valley heat is contributed, valley electricity is contributed；The 7-8 point periods, peak heat is contributed, intermediate value electricity goes out
Power；The 8-12 point periods, peak heat is contributed, peak value electricity is contributed；The 12-17 point periods, intermediate value heat is contributed, peak value electricity is contributed；17-20 points
Period, valley heat is contributed, intermediate value electricity is contributed；The 20-22 point periods, peak heat is contributed, peak value electricity is contributed；22-2 point periods, peak value
Heat is contributed, intermediate value electricity is contributed；The 2-5 point periods, intermediate value heat is contributed, valley electricity is contributed；Steam power plant's variable body of " electricity determining by heat " is based on
Thermoelectricity, which is avoided the peak hour, participates in the steam power plant of peak load regulation network, that is, on the basis of meeting thermic load, steam power plant carries out the peak load of power grid double
To peak regulation.
3. a kind of avoided the peak hour using steam power plant as claimed in claim 1 based on thermoelectricity participates in peak load regulation network side with heat supply network heat accumulation
Method, it is characterised in that on the basis of thermoelectricity avoids the peak hour participation peak load regulation network, the coupling of thermoelectricity load is pulled open by heat supply network heat accumulation characteristic
Relation, implements the further peak regulation of power grid；The peak regulation period is 20-5 points, the valley peak regulation contributed by being superimposed electricity, power grid valley
Electric output peak regulation flow during load is specific as follows：
(1) 20-22 point periods, temperature given value rise to T_middle_upper, the heat supply network heat accumulation gain of heat from T_middle_lower
Q_MLtoMU is measured, is contributed at this time for peak heat, peak value electricity is contributed；
(2) 22-2 point periods, temperature given value are down to T_middle from T_middle_upper, and heat supply network heat accumulation subtracts Q_MUtoM, this
When heat output ＜ peak heats contribute, electric output ＜ intermediate values electricity is contributed, lower power grid valley.
(3) 2-5 point periods, temperature given value are down to T_middle_lower from T_middle, and heat supply network heat accumulation subtracts Q_MtoML, this
When, hot output ＜ intermediate values heat is contributed, and electric output ＜ valleies electricity is contributed, is lowered power grid valley；
Wherein, variable declaration is as follows：
Temperature temperature, T heat quantity of heat, Q
Specific heat capacity specific heat capacity, C mass Ms ass, M
Temperature upper limit T_upper
Lowest temperature T_lower
Temperature intermediate value T_middle=0.5 × (T_upper+T_lower)
Upper value T_middle_upper=0.5 × (T_middle+T_upper) in temperature
Lower value T_middle_lower=0.5 × (T_middle+T_lower) in temperature
Heat supply network heat accumulation heat supply network heat accumulation, H
Heat supply network heat accumulation HT_middle=C × M × (T_middle-T_lower) during temperature intermediate value
Heat supply network heat accumulation HT_middle_upper during upper value in temperature
=C × M × (T_middle_upper-T_lower)
Heat supply network heat accumulation HT_middle_lower during lower value in temperature
=C × M × (T_middle_lower-T_lower)
In temperature up to it is middle when quantity of heat storage Q_MUtoM=HT_middle-HT_middle_upper
In temperature under when quantity of heat storage Q_MtoML=HT_middle_lower-HT_middle
Quantity of heat storage Q_MLtoMU when upper in temperature
=HT_middle_upper-HT_middle_lower
Q_MLtoMU ＞ 0, Q_MUtoM ＜ 0, Q_MtoML ＜ 0
Algorithmic descriptions are as follows：
(1) lowest temperature T_lower is on the basis of heat supply network heat accumulation；
(2) codomain T_middle_upper, T_middle, T_middle_lower of temperature given value pass through temperature given value
Change, adjust the heat of heat supply network heat accumulation；
(3) temperature given value is by for thermally safe constraint；
Thermic load peak value will enter peak value, temperature given value T_middle_upper
Thermic load valley will enter valley, temperature given value T_middle_lower
Thermic load intermediate value will enter intermediate value, temperature given value T_middle.
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Granted publication date: 20200922 |