CN102445932B - Control method and device for mutual coordination of multiple combined heat and power generation sets - Google Patents
Control method and device for mutual coordination of multiple combined heat and power generation sets Download PDFInfo
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Abstract
The invention provides a control method for mutual coordination of multiple combined heat and power generation sets, comprising the following step: a heat supply public control unit acquires a current power load and a current heat load of each set respectively, calculates the theoretical heat supply steam extraction amount of each set, compares the current heat supply steam extraction amount of each set with the theoretical heat supply steam extraction amount, and regulates a valve to a corresponding position. According to the invention, a reasonable distribution of heat loads to the sets is regulated effectively, the regulation allowance of the power load is improved and the energy efficiency of the sets is improved.
Description
Technical field
The present invention relates to thermal power generation field, in particular, relate to control method and the device between a kind of a plurality of cogeneration units, mutually coordinated.
Background technology
Along with improving constantly of people's quality of life, increasing electronic product enters each family, and increasing electric energy will be required, in actual economical production, some thermal power generation field had both produced electric energy, and the steam that utilizes again boiler to produce carries out heat supply to user.This mode of production of simultaneously producing electric energy, heat energy is called as cogeneration of heat and power.
Cogeneration units adopts single unit independently to control conventionally, there is no interactive signal between unit.This has caused when boiler output does not reach maximum, and cogeneration units adopts the regulative mode of thermoelectricity separation conventionally, causes the boiler can not maximum using, and the thermal efficiency of unit is lower; And reach after maximum when boiler output; cogeneration units adopts the regulative mode of electricity determining by heat conventionally; according to energy equilibrium formula: boiler total amount of heat=thermal load+electric load; conventionally unit is after meeting user's thermal load demand; according to boiler total amount of heat, determine again the number of electric load, so just sacrificed electric load.
To sum up, there is no the mutual control method for coordinating between a kind of a plurality of thermoelectricity Congress of Industrial Organizations unit, can meet when certain boiler output maximizes, between reasonable distribution unit, improve the adjusting surplus of electric load when thermal load.
Summary of the invention
In view of this, the invention provides control method and the device between a kind of a plurality of cogeneration units, mutually coordinated, at certain unit boiler, exert oneself maximized time, when can make the thermal load reasonable distribution between unit, improve the adjusting surplus of electric load, and then improve the thermal efficiency of unit.
For achieving the above object, the invention provides following technical scheme:
A control method of mutually coordinating between a plurality of cogeneration units, wherein, comprises step:
Heat supply common control unit obtains respectively current electric load and the current thermal load of each unit, and described current thermal load is shown by the heat supply scale that draws gas;
The total heat duties that heat supply common control unit is multiplied by all units according to the current electric load of described each unit, divided by all unit total electric loads, draws the theoretical heat supply amount of drawing gas of each unit;
The described current heat supply amount of drawing gas of each unit of heat supply common control unit comparison and the described theoretical heat supply amount of drawing gas, if the described current heat supply amount of drawing gas is greater than the described theoretical heat supply amount of drawing gas, regulate the described heat supply valve that draws gas to turn down, until the described current heat supply amount of drawing gas stops valve regulated while equaling the described theoretical heat supply amount of drawing gas; If the described current heat supply amount of drawing gas is less than the described theoretical heat supply amount of drawing gas, regulate the described heat supply valve that draws gas to open greatly, until the described current heat supply amount of drawing gas stops valve regulated while equaling the described theoretical heat supply amount of drawing gas.
Preferably, also comprise step:
" heat supply draw gas operating mode operation restriction and graph of a relation " providing according to cogeneration units manufacturing plant, obtain the maximum band electric load of each cogeneration units, the maximum of getting described each cogeneration units is the upper limit as the electric load instruction settings of corresponding cogeneration units with electric load;
" heat supply draw gas operating mode operation restriction and graph of a relation " providing according to cogeneration units manufacturing plant, obtain the minimum band electric load of each cogeneration units, the minimum of getting described each cogeneration units is the lower limit as the electric load instruction settings of corresponding cogeneration units with electric load;
Send the upper and lower bound of described electric load instruction settings of each unit to power-management centre.
Preferably, also comprise step:
Its corresponding valve opening adjustment amount size when analyzing different electric load amplitude of fluctuation, draws the relation function of electric load amplitude of fluctuation and valve opening adjustment amount;
When unit generation electric load changes, according to described relation function, calculate corresponding valve opening adjustment amount;
According to described relation function, calculate corresponding valve opening adjustment amount, and adjust valve position to relevant position, realize the quick elimination disturbance function of system.
Preferably, also comprise step:
By analyzing boiler fuel amount corresponding to the different heat supply amount of drawing gas changing values, draw the relation function of the boiler fuel amount that the heat supply amount of drawing gas changing value is corresponding;
When quantitative change is drawn gas in unit generation heat supply, according to described relation function, calculate corresponding boiler fuel amount;
According to described relation function, calculate corresponding boiler fuel amount, adjust boiler fuel amount to described relation function and calculate corresponding boiler fuel amount.
The public control module of heat supply, wherein, is connected with a plurality of cogeneration units, comprising:
Acquiring unit, for obtaining current electric load and the current thermal load of each unit;
Computing unit, divided by all unit total electric loads, draws the theoretical heat supply amount of drawing gas of each unit for the total heat duties that is multiplied by all units according to the current electric load of described each unit;
Comparing unit, the size for the more described current heat supply amount of drawing gas with the described theoretical heat supply amount of drawing gas;
Regulon, for according to described comparative result, valve position when control valve to the corresponding described current heat supply amount of drawing gas equals the described theoretical heat supply amount of drawing gas.
Preferably, also comprise electric load instruction limiting module, described electric load instruction limiting module comprises:
Electric load acquiring unit, for " heat supply draw gas operating mode operation restriction and graph of a relation " providing according to cogeneration units manufacturing plant, obtain the maximum of each cogeneration units, minimum band electric load, the maximum, minimum of getting described each cogeneration units be the upper and lower bound as the electric load instruction settings of corresponding cogeneration units with electric load;
Transmitting element, for the upper and lower bound of described electric load instruction settings that sends each unit to power-management centre.
Preferably, also comprise electric load feedforward control module, described electric load feedforward control module comprises:
Electric load analytic unit, its corresponding valve opening adjustment amount size when analyzing different electric load amplitude of fluctuation, draws the relation function of electric load amplitude of fluctuation and valve opening adjustment amount;
Electric load computing unit, for when unit generation electric load changes, calculates corresponding valve opening adjustment amount according to described relation function;
Electric load regulon, for according to described valve opening adjustment amount, adjusts valve position to relevant position, realizes the quick elimination disturbance function of system.
Preferably, also comprise thermal load feedforward control module, described thermal load feedforward control module comprises:
Thermal load analysis unit, for analyzing boiler fuel amount corresponding to the different heat supply amount of drawing gas changing values, draws the relation function of the boiler fuel amount that the heat supply amount of drawing gas changing value is corresponding;
Calculation of Heat Load unit, for when quantitative change is drawn gas in unit generation heat supply, calculates corresponding boiler fuel amount according to described relation function;
Heat load adjustment unit, for calculate corresponding boiler fuel amount according to described relation function, adjusts boiler fuel amount to described relation function and calculates corresponding boiler fuel amount.
Known via above-mentioned technical scheme, compared with prior art, the invention provides control method and the device between a kind of a plurality of cogeneration units, mutually coordinated, by being increased in the public control module of heat supply between cogeneration units, effectively regulated the reasonable distribution of thermal load between unit, and improved the adjusting surplus of electric load, improved the efficiency of unit; Also increased the electric load instruction limiting module of cogeneration units, make the instruction of unit electric load just limit the real-time change along with the variation of the heat supply amount of drawing gas, all the time can truly reflect the real ability of unit band electric load, guarantee the unit work of can not transfiniting, and then protected equipment, and in real time the real ability of unit band electric load is sent to scheduling, avoid machine unit automatic generation to control the unnecessary loss in AGC Performance Assessment aspect; Also increased a kind of control module with feedforward, made heat supply extraction pressure variable valve energy rapid adjustment valve position, moment is eliminated disturbance, guarantees the stable of thermal load.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
The control method process flow diagram of mutually coordinating between a kind of a plurality of cogeneration units that Fig. 1 provides for the embodiment of the present invention;
The method flow diagram of the electric load instruction limiting protecting that Fig. 2 provides for the embodiment of the present invention;
The method flow diagram of the electric load feedforward control that Fig. 3 provides for the embodiment of the present invention;
The method flow diagram of the thermal load feedforward control that Fig. 4 provides for the embodiment of the present invention;
Two cogeneration units that Fig. 5 provides for the embodiment of the present invention and the connection layout of the public control module of heat supply;
The control device structural drawing of mutually coordinating between a kind of a plurality of cogeneration units that Fig. 6 provides for the embodiment of the present invention;
The control device structural drawing of mutually coordinating between another a plurality of cogeneration units that Fig. 7 provides for the embodiment of the present invention;
The control device structural drawing of mutually coordinating between another a plurality of cogeneration units that Fig. 8 provides for the embodiment of the present invention;
The control device structural drawing of mutually coordinating between another a plurality of cogeneration units that Fig. 9 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
For quote and know for the purpose of, the explanation of the technical term hereinafter using, write a Chinese character in simplified form or abridge and be summarized as follows:
Cogeneration of heat and power: in actual economical production life, have some fuel-burning power plant both to produce electric energy, the steam that utilizes again boiler to produce carries out heat supply to user.This mode of production of simultaneously producing electric energy, heat energy is called as cogeneration of heat and power.
Electric load: the electric energy that the unit that generates electricity by way of merging two or more grid systems drives generator to produce by steam turbine, the active power of the unit that generates electricity by way of merging two or more grid systems, unit can be MW.
Thermal load: the hot user who refers in this article cogeneration units between unit in required heat, conventionally by the heat supply amount of drawing gas of unit, characterize, unit can be t/h.
DCS: scattered control system Distributed Control System, is widely used in generating plant control field.
DEH: digital electrohydraulic control system Digital Electric Hydraulic Control System, is applied to generating plant steam turbine control system conventionally.
AGC: Automatic Generation Control Automatic Generation Control, according to network load instruction, controls the automatic control system of genset active power.
CCS: coordinated control system Coordinated Control System, the boiler of genset and steam turbine are carried out to the control of integral load balance, mainly comprise the control loops such as unit load instruction control, steam turbine master control, pressure setting, frequency correction, runback.
Electricity determining by heat: a kind of control mode that cogeneration units generally adopts, stipulated boiler output reach maximum in, the rising of thermal load must be sacrificed electric load, thermal load has determined the maximum electric load of unit.
Controlled device: in automation field, refer generally to controlled equipment or process.
The invention provides the control method of mutually coordinating between a kind of a plurality of cogeneration units, comprise step:
Heat supply common control unit obtains respectively current electric load and the current thermal load of each unit, and described current thermal load is shown by the heat supply scale that draws gas;
The total heat duties that heat supply common control unit is multiplied by all units according to the current electric load of described each unit, divided by all unit total electric loads, draws the theoretical heat supply amount of drawing gas of each unit;
The described current heat supply amount of drawing gas of each unit of heat supply common control unit comparison and the described theoretical heat supply amount of drawing gas, if the described current heat supply amount of drawing gas is greater than the described theoretical heat supply amount of drawing gas, regulate the described heat supply valve that draws gas to turn down, until the described current heat supply amount of drawing gas stops valve regulated while equaling the described theoretical heat supply amount of drawing gas; If the described current heat supply amount of drawing gas is less than the described theoretical heat supply amount of drawing gas, regulate the described heat supply valve that draws gas to open greatly, until the described current heat supply amount of drawing gas stops valve regulated while equaling the described theoretical heat supply amount of drawing gas.
Its specific implementation is as described below:
Fig. 1 is the control method process flow diagram of mutually coordinating between a kind of a plurality of cogeneration units provided by the invention, and the method comprising the steps of:
S101: heat supply common control unit obtains respectively current electric load and the current thermal load of each unit, described current thermal load is shown by the heat supply scale that draws gas.
S102: the total heat duties that heat supply common control unit is multiplied by all units according to the current electric load of described each unit, divided by all unit total electric loads, draws the theoretical heat supply amount of drawing gas of each unit.
It is example that two cogeneration units of take connect heat supply common control unit, and as shown in Figure 5, the #1 unit heat supply amount of drawing gas Q1 has represented the thermal load of #1 unit, and #1 unit active power MW1 has represented the electric load of #1 unit; Same Q2 has represented the thermal load of #2 unit, and MW2 has represented the electric load of #2 unit.Thermal load and the electric load of two units all change at any time.By following formula, calculate theoretical heat supply the draw gas amount of every unit under current working:
S103: the current heat supply amount of drawing gas and the theoretical heat supply amount of the drawing gas size that compare each unit.
According to comparative result, can be divided into two steps:
S1031: the current heat supply amount of drawing gas is greater than the theoretical heat supply amount of drawing gas, regulates the heat supply valve that draws gas to turn down;
S1032: the current heat supply amount of drawing gas is less than the theoretical heat supply amount of drawing gas, regulates the heat supply valve that draws gas to open greatly;
The theoretical heat supply amount of drawing gas of the actual heat supply amount of the drawing gas Q1 that #1 unit is current and #1 unit Q
t1compare, if Q1 > is Q
t1illustrate that the actual heat supply of the #1 unit amount of drawing gas is excessive, need to regulate the heat supply of #1 machine to draw gas to adjust valve to turn down, reduce the amount of drawing gas.If Q1 < is Q
t1illustrate that the actual heat supply of the #1 unit amount of drawing gas is too small, need to regulate the heat supply of #1 machine to draw gas to adjust valve and open greatly, the increase amount of drawing gas.
Equally, the current actual heat supply amount of drawing gas Q2 and the theoretical heat supply amount of drawing gas of the #1 unit Q of #2 unit
t2compare, if Q2 > is Q
t2illustrate that the actual heat supply of the #2 unit amount of drawing gas is excessive, need to regulate the heat supply of #2 machine to draw gas to adjust valve to turn down, reduce the amount of drawing gas.If Q2 < is Q
t2illustrate that the actual heat supply of the #2 unit amount of drawing gas is too small, need to regulate the heat supply of #2 machine to draw gas to adjust valve and open greatly, the increase amount of drawing gas.
S104: regulate the valve position of unit until the current heat supply amount of drawing gas of this unit equals the theoretical heat supply amount of drawing gas.
The present invention is higher according to unit electric load, and the principle that its heat supply pump gas ablity is less designs.The unit that electric load is higher, its heat supply pump gas ablity is less, heat supply common control unit is drawn gas and is adjusted valve and turn down by automatic adjusting heat supply, and then reduce the heat supply amount of drawing gas of its unit, do not met when boiler output does not exceed maximum constraints and guaranteed the surplus that unit electric load raises to guarantee unit safety yet.On the contrary, the unit that electric load is lower, its heat supply pump gas ablity is larger, heat supply common control unit is drawn gas and is adjusted valve and open greatly by automatic adjusting heat supply, and then increase the heat supply amount of drawing gas of its unit, certain unit boiler is exerted oneself maximized time, between reasonable distribution unit, improve the adjusting surplus of electric load when thermal load, and then improve the thermal efficiency of unit.
By formula (1) and formula (2), can be found out Q
t1+ Q
t2=Q1+Q2, i.e. the two mechanism opinion heat supplies total amount of drawing gas equals the actual heat supply of the two machines total amount of drawing gas, and through the #1 unit of reasonable distribution and the heat supply of the #2 unit total amount of drawing gas, is constant, has guaranteed that whole electric power supply plant supplies with user's heat demand.
In the situation that cogeneration units drops into for thermal condition, the energy part that boiler produces enters steam turbine acting, become electric energy, another part energy enters heat supply extraction line provides heat energy for hot user, so now the electric load instruction of unit just can not be determined by AGC instruction completely, and should remove the part energy that heat supply is drawn gas and taken away, based on above-mentioned thought, the present invention increases electric load instruction conditioning step before step S101.
The method flow diagram of the electric load instruction limiting protecting that Fig. 2 provides for the embodiment of the present invention.
S201: " heat supply draw gas operating mode operation restriction and graph of a relation " providing according to cogeneration units manufacturing plant, obtain the maximum band electric load of each cogeneration units, the maximum of getting described each cogeneration units is the upper limit as the electric load instruction settings of corresponding cogeneration units with electric load;
S202: " heat supply draw gas operating mode operation restriction and graph of a relation " providing according to cogeneration units manufacturing plant, obtain the minimum band electric load of each cogeneration units, the minimum of getting described each cogeneration units is the lower limit as the electric load instruction settings of corresponding cogeneration units with electric load;
Turbine making factory dispatches from the factory or a < < heat supply draw gas operating mode operation restriction and graph of a relation > > can be provided during heat supply improvement and design at steam turbine, the number that we can draw the unit heat supply amount of drawing gas by graph of a relation has determined the upper and lower bound of unit electric load, just obtains accordingly two funtcional relationship: f (x)
1, i.e. the unit heat supply amount of drawing gas can be with the relation function of electric load with unit maximum; F (x)
2, i.e. the relation function of the charged load of I of the unit heat supply amount of drawing gas and unit.For example, under #1 unit current working, the heat supply amount of drawing gas is Q1, through f (x)
1calculate #1 unit maximum and can be with electric load N1, with other high limit conditions of unit get little, as the upper limit of unit electric load instruction; Through f (x)
2calculate the charged load of the I N2 of #1 unit, get greatly with other lower bound conditions of unit, as the lower limit of unit electric load instruction.
S203: send the upper and lower bound of described electric load instruction settings of each unit to power-management centre.
By the method, can make the instruction of unit electric load limit up and down the real-time change along with the variation of the heat supply amount of drawing gas, the real ability of group with electric load that reflected machine really, guarantees the unit work of can not transfiniting, protection major equipment; And in real time the real ability of unit band electric load is sent to scheduling, and make corresponding AGC instruction setting value be no more than unit virtual rating, can avoid the unnecessary loss in unit AGC Performance Assessment aspect.
The method flow diagram of the electric load feedforward control that Fig. 3 provides for the embodiment of the present invention, the method is by quick adjustment heat supply extraction regulation valve to corresponding valve position, and moment is eliminated disturbance, guarantees the stable of thermal load.Concrete methods of realizing is:
S301: its corresponding valve opening adjustment amount size when analyzing different electric load amplitude of fluctuation, draws the relation function of electric load amplitude of fluctuation and valve opening adjustment amount;
The relation function of described electric load amplitude of fluctuation and valve opening adjustment amount is to record by test of many times.
S302: when unit generation electric load changes, calculate corresponding valve opening adjustment amount according to described relation function;
S303: calculate corresponding valve opening adjustment amount according to described relation function, and adjust valve position to relevant position, realize the quick elimination disturbance function of system.
The method flow diagram of the thermal load feedforward control that Fig. 4 provides for the embodiment of the present invention, when the thermal load of unit changes, the variation meeting of the heat supply amount of drawing gas directly impact enters the quantity of steam of steam turbine acting, and then the electric load of unit and main vapour pressure are caused to disturbance.The present invention introduces thermal load disturbance factor in the CCS control loop of electric load, and steam turbine pitch and boiler fuel amount are moved in advance, eliminates fast thermal load and changes the disturbance causing.Method is as follows:
S401: by analyzing boiler fuel amount corresponding to the different heat supply amount of drawing gas changing values, draw the relation function of the boiler fuel amount that the heat supply amount of drawing gas changing value is corresponding;
S402: when quantitative change is drawn gas in unit generation heat supply, calculate corresponding boiler fuel amount according to described relation function;
S403: calculate corresponding boiler fuel amount according to described relation function, adjust boiler fuel amount to described relation function and calculate corresponding boiler fuel amount.
The present invention calculates boiler fuel amount corresponding to the heat supply amount of drawing gas, as the feedforward of fuel master control.The energy that boiler is produced can meet the demand that steam turbine does work and heat supply is drawn gas all the time.When the heat supply amount of drawing gas changes, steam turbine master control meeting is along with unit corresponding to the heat amount of drawing gas should be sent out power and change and to change fast steam turbine instruction, and then change pitch aperture, eliminate electric load and vapour pressure disturbance that thermal load changes and brings, fuel master control simultaneously also should become boiler instruction mutually, adjust fuel quantity, from source, eliminate the energy imbalance that thermal load changes and brings.
In the embodiment that the invention described above provides, describe method in detail, for method of the present invention, can adopt the device of various ways to realize, so the present invention also provides a kind of device, provided specific embodiment below and be elaborated.
Refer to Fig. 6, the control device structural drawing of mutually coordinating between a kind of a plurality of cogeneration units that Fig. 6 provides for the embodiment of the present invention.
The public control module of heat supply, is connected with a plurality of cogeneration units, comprising:
Acquiring unit 601, for obtaining current electric load and the current thermal load of each unit;
Comparing unit 603, the size for the more described current heat supply amount of drawing gas with the described theoretical heat supply amount of drawing gas;
The specific implementation of the function of the modules in above-described embodiment can, with reference to each step in above-described embodiment, repeat no more here.
The structured flowchart of electric load instruction limiting module has been provided on the basis of Fig. 7 for the embodiment providing at Fig. 6 provided by the invention, and wherein, described electric load instruction limiting module comprises:
Electric load acquiring unit 701, for " heat supply draw gas operating mode operation restriction and graph of a relation " providing according to cogeneration units manufacturing plant, obtain the maximum of each cogeneration units, minimum band electric load, the maximum, minimum of getting described each cogeneration units be the upper and lower bound as the electric load instruction settings of corresponding cogeneration units with electric load;
Transmitting element 702, for the upper and lower bound of described electric load instruction settings that sends each unit to power-management centre.
The structured flowchart of electric load feedforward control module has been provided on the basis of Fig. 8 for the embodiment providing at Fig. 7 provided by the invention, and wherein, described electric load feedforward control module comprises:
Electric load analytic unit 801, its corresponding valve opening adjustment amount size when analyzing different electric load amplitude of fluctuation, draws the relation function of electric load amplitude of fluctuation and valve opening adjustment amount;
Electric load computing unit 802, for when unit generation electric load changes, calculates corresponding valve opening adjustment amount according to described relation function;
Electric load regulon 803, for according to described valve opening adjustment amount, adjusts valve position to relevant position, realizes the quick elimination disturbance function of system.
The structured flowchart of electric load instruction limiting module has been provided on the basis of Fig. 9 for the embodiment providing at Fig. 8 provided by the invention, and wherein, described thermal load feedforward control module comprises:
Thermal load analysis unit 901, for analyzing boiler fuel amount corresponding to the different heat supply amount of drawing gas changing values, draws the relation function of the boiler fuel amount that the heat supply amount of drawing gas changing value is corresponding;
Calculation of Heat Load unit 902, for when quantitative change is drawn gas in unit generation heat supply, calculates corresponding boiler fuel amount according to described relation function;
Heat load adjustment unit 903, for calculate corresponding boiler fuel amount according to described relation function, adjusts boiler fuel amount to described relation function and calculates corresponding boiler fuel amount.
In sum, the invention provides control method and the device between a kind of a plurality of cogeneration units, mutually coordinated, by being increased in the heat supply common control unit between cogeneration units, effectively regulated the reasonable distribution of thermal load between unit, and improved the adjusting surplus of electric load, improved the efficiency of unit; Also increased the electric load instruction limit circuit of cogeneration units, make the instruction of unit electric load just limit the real-time change along with the variation of the heat supply amount of drawing gas, all the time can truly reflect the real ability of unit band electric load, guarantee the unit work of can not transfiniting, and then protected equipment, and in real time the real ability of unit band electric load is sent to scheduling, make Automatic Generation Control AGC instruction be no more than unit virtual rating, avoid machine unit automatic generation to control the unnecessary loss in AGC Performance Assessment aspect; Also increased a kind of control loop with feedforward, made heat supply extraction pressure variable valve energy rapid adjustment valve position, moment is eliminated disturbance, guarantees the stable of thermal load.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.For the device providing for embodiment, because its method providing with embodiment is corresponding, so description is fairly simple, relevant part partly illustrates referring to method.
Above-mentioned explanation to provided embodiment, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle provided in this article and features of novelty.
Claims (8)
1. a control method of mutually coordinating between a plurality of cogeneration units, is characterized in that, comprises step:
Heat supply common control unit obtains respectively current electric load and the current thermal load of each unit, and described current thermal load is shown by the current heat supply scale that draws gas;
The total heat duties that heat supply common control unit is multiplied by all units according to the current electric load of described each unit, divided by all unit total electric loads, draws the theoretical heat supply amount of drawing gas of each unit;
The described current heat supply amount of drawing gas of each unit of heat supply common control unit comparison and the described theoretical heat supply amount of drawing gas, if the described current heat supply amount of drawing gas is greater than the described theoretical heat supply amount of drawing gas, regulate the described heat supply valve that draws gas to turn down, until the described current heat supply amount of drawing gas stops valve regulated while equaling the described theoretical heat supply amount of drawing gas; If the described current heat supply amount of drawing gas is less than the described theoretical heat supply amount of drawing gas, regulate the described heat supply valve that draws gas to open greatly, until the described current heat supply amount of drawing gas stops valve regulated while equaling the described theoretical heat supply amount of drawing gas.
2. control method according to claim 1, is characterized in that, also comprises step:
" heat supply draw gas operating mode operation restriction and graph of a relation " providing according to cogeneration units manufacturing plant, obtain the maximum band electric load of each cogeneration units, the maximum of getting described each cogeneration units is the upper limit as the electric load instruction settings of corresponding cogeneration units with electric load;
" heat supply draw gas operating mode operation restriction and graph of a relation " providing according to cogeneration units manufacturing plant, obtain the minimum band electric load of each cogeneration units, the minimum of getting described each cogeneration units is the lower limit as the electric load instruction settings of corresponding cogeneration units with electric load;
Send the upper and lower bound of described electric load instruction settings of each unit to power-management centre.
3. control method according to claim 2, is characterized in that, also comprises step:
Its corresponding valve opening adjustment amount size when analyzing different electric load amplitude of fluctuation, draws the relation function of electric load amplitude of fluctuation and valve opening adjustment amount;
When unit generation electric load changes, according to described relation function, calculate corresponding valve opening adjustment amount;
According to described relation function, calculate corresponding valve opening adjustment amount, and adjust valve position to relevant position, realize the quick elimination disturbance function of system.
4. control method according to claim 2, is characterized in that, also comprises step:
By analyzing boiler fuel amount corresponding to the different heat supply amount of drawing gas changing values, draw the relation function of the boiler fuel amount that the heat supply amount of drawing gas changing value is corresponding;
When quantitative change is drawn gas in unit generation heat supply, according to described relation function, calculate corresponding boiler fuel amount;
According to described relation function, calculate corresponding boiler fuel amount, adjust boiler fuel amount to described relation function and calculate corresponding boiler fuel amount.
5. the public control module of heat supply, is characterized in that, is connected with a plurality of cogeneration units, comprising:
Acquiring unit, for obtaining current electric load and the current thermal load of each unit, described current thermal load is shown by the current heat supply scale that draws gas;
Computing unit, divided by all unit total electric loads, draws the theoretical heat supply amount of drawing gas of each unit for the total heat duties that is multiplied by all units according to the current electric load of described each unit;
Comparing unit, the size for the more described current heat supply amount of drawing gas with the described theoretical heat supply amount of drawing gas;
Regulon, for according to described comparative result, valve position when control valve to the corresponding described current heat supply amount of drawing gas equals the described theoretical heat supply amount of drawing gas.
6. the public control module of heat supply according to claim 5, is characterized in that, also comprises electric load instruction limiting module, and described electric load instruction limiting module comprises:
Electric load acquiring unit, for " heat supply draw gas operating mode operation restriction and graph of a relation " providing according to cogeneration units manufacturing plant, obtain the maximum of each cogeneration units, minimum band electric load, the maximum, minimum of getting described each cogeneration units be the upper and lower bound as the electric load instruction settings of corresponding cogeneration units with electric load;
Transmitting element, for the upper and lower bound of described electric load instruction settings that sends each unit to power-management centre.
7. the public control module of heat supply according to claim 5, is characterized in that, also comprises electric load feedforward control module, and described electric load feedforward control module comprises:
Electric load analytic unit, its corresponding valve opening adjustment amount size when analyzing different electric load amplitude of fluctuation, draws the relation function of electric load amplitude of fluctuation and valve opening adjustment amount;
Electric load computing unit, for when unit generation electric load changes, calculates corresponding valve opening adjustment amount according to described relation function;
Electric load regulon, for according to described valve opening adjustment amount, adjusts valve position to relevant position, realizes the quick elimination disturbance function of system.
8. the public control module of heat supply according to claim 5, is characterized in that, also comprises thermal load feedforward control module, and described thermal load feedforward control module comprises:
Thermal load analysis unit, for analyzing boiler fuel amount corresponding to the different heat supply amount of drawing gas changing values, draws the relation function of the boiler fuel amount that the heat supply amount of drawing gas changing value is corresponding;
Calculation of Heat Load unit, for when quantitative change is drawn gas in unit generation heat supply, calculates corresponding boiler fuel amount according to described relation function;
Heat load adjustment unit, for calculate corresponding boiler fuel amount according to described relation function, adjusts boiler fuel amount to described relation function and calculates corresponding boiler fuel amount.
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| CN102662387A (en) * | 2012-06-01 | 2012-09-12 | 张克 | Heat supply monitoring system and method |
| CN106014514B (en) * | 2016-06-24 | 2017-09-15 | 南京化学工业园热电有限公司 | Thermoelectricity joint debugging control system and method |
| CN109901386B (en) * | 2017-12-11 | 2022-06-14 | 国电科学技术研究院 | Combined control method and system for thermoelectric unit |
| CN108549231B (en) * | 2018-05-07 | 2021-01-01 | 华北电力大学 | Coordinated control method of combined heat and power generation unit integrating heat supply steam extraction regulation |
| CN108708775B (en) * | 2018-05-07 | 2021-01-01 | 华北电力大学 | Quick load change control method of cogeneration unit based on thermoelectric load conversion model |
| CN108826437B (en) * | 2018-05-14 | 2021-06-29 | 冉启发 | Multi-machine steam extraction and heat supply control device and use method |
| CN110792481A (en) * | 2019-09-16 | 2020-02-14 | 华北电力大学 | Cogeneration power generation system and control method thereof |
| CN111638693B (en) * | 2020-06-04 | 2021-04-27 | 杭州和利时自动化有限公司 | Method and system for controlling multiple devices |
| CN113205224B (en) * | 2021-05-17 | 2022-06-14 | 浙江英集动力科技有限公司 | Primary frequency modulation method of cogeneration unit based on heat storage of heat supply network |
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