CN109118017B - Thermal load optimization distribution method, electronic device, and storage medium - Google Patents

Thermal load optimization distribution method, electronic device, and storage medium Download PDF

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CN109118017B
CN109118017B CN201811018929.1A CN201811018929A CN109118017B CN 109118017 B CN109118017 B CN 109118017B CN 201811018929 A CN201811018929 A CN 201811018929A CN 109118017 B CN109118017 B CN 109118017B
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韩建春
张叔禹
刘永江
张国斌
荀华
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Inner Mongolia Electric Power Research Institute of Inner Mongolia Power Group Co Ltd
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Abstract

The invention relates to a thermal load optimization distribution method, an electronic device and a storage medium, and an electronic device and a storage medium. The method comprises the steps of obtaining heat supply parameters of each unit, wherein the heat supply parameters comprise heat supply steam extraction amount during heat supply; calculating the heat supply amount of each unit according to the heat supply parameters of each unit; calculating available energy consumed by each unit when heat supply is provided; calculating the heat supply energy loss index of each unit according to the heat supply amount and the available energy of each unit; and performing heat load optimal distribution according to the heat supply energy loss index of each unit. The heat supply amount of each unit is determined according to the heat supply steam extraction amount during the heat supply period, the heat supply energy loss index of each unit is obtained based on the heat supply amount and the available energy consumed during the heat supply amount of each unit, and the heat load is optimally distributed according to the heat supply energy loss index of each unit, so that the heat load is not distributed blindly.

Description

Thermal load optimization distribution method, electronic device, and storage medium
Technical Field
The invention relates to the technical field of power plant turbines, in particular to a heat load optimal distribution method, electronic equipment, a storage medium, electronic equipment and a storage medium.
Background
In recent years, with the increase of urban construction and winter heating demand, the heat load of a thermal power plant is continuously increased, and numerous power plants begin to expand and reform on the basis of the original power plant units. Meanwhile, with the access of new energy, the contradiction between heat and electric loads of a combined heat and power generation unit in winter is more and more prominent, so that multiple heat power plants are transformed from original adjustment of steam extraction and heat supply into multiple modes of steam extraction, high back pressure, heat pumps and the like for heat supply, so that the load demand can be met and the energy can be saved to the maximum extent in the multiple heat supply mode, the energy consumption evaluation and the optimal distribution of the heat loads among different heat supply modes can be realized, and the low-carbon and environment-friendly load distribution can be realized.
At present, the traditional mode is adopted in the actual operation process of the thermal power plant, the adjustment is less under the condition of ensuring the flow and the temperature of the circulating water of a heat supply network, and the optimal matching between heat and electricity is less considered. The regulation method mainly comprises the following three modes: evenly distributing heat load; secondly, a certain unit carries all or basic heat loads, and other units carry out adjustment; and thirdly, the operation personnel can independently adjust the heat supply indexes of the heat supply network.
Even some power plants make partial load curves through tests, no intuitive and convenient index is used as an adjusting basis, and as the unit cannot operate completely according to the test working condition and reliable and intuitive evaluation basis is used as support, the practical operation still has great blindness.
Disclosure of Invention
Technical problem to be solved
In order to perform heat load distribution without blindness, the invention provides a heat load optimization distribution method, an electronic device and a storage medium, and an electronic device and a storage medium.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
a heat load optimal distribution method is applied to a multi-element heating mode and comprises the following steps:
s101, obtaining heat supply parameters of each unit, wherein the heat supply parameters comprise heat supply steam extraction amount, heat supply steam extraction enthalpy, heat supply steam extraction drainage enthalpy and heat supply amount in a non-steam extraction mode during heat supply, or the heat supply parameters comprise heat supply network circulating water flow, heat supply network water supply enthalpy and heat supply network water return enthalpy;
s102, calculating the heat supply amount of each unit according to the heat supply parameters of each unit;
s103, calculating available energy consumed by each unit during heat supply;
s104, calculating the heat supply energy loss index of each unit according to the heat supply amount and the available energy of each unit;
s105, performing heat load optimal distribution according to the heat supply energy loss index of each unit;
when the heat supply parameter includes a heat supply extraction amount, a heat supply extraction enthalpy, a heat supply extraction hydrophobic enthalpy, and a heat supply amount in a non-extraction manner during the heat supply, the S102 includes:
for any unit i, the heat supply amount calculation formula of any unit i is as follows:
Gi＝Fi×(hig-hih)+Gi'；
Gifor the heat supply of said any unit i, FiAmount of heat extraction h during heat supply to said unit iigFor the heat-supply extraction enthalpy, h, of said set iihFor the heat supply steam extraction and drainage enthalpy, G, of any of the units ii' is the heat supply amount of any unit i in a non-steam extraction mode;
when the heat supply parameters include a heat supply network circulating water flow, a heat supply network water supply enthalpy and a heat supply network water return enthalpy, the S102 includes:
for any unit i, the heat supply amount calculation formula of any unit i is as follows:
Gi＝Firw×(higs-hihs)；
wherein, FirwThe flow rate h of the circulating water of the heat supply network of any unit iigsSupply water enthalpy, h, to the heat supply network of any of the units iihsAnd (4) the return water enthalpy of the heat supply network of any unit i.
Optionally, the Gi' is calculated by the following formula:
Gi'＝Firw×(hics-hijs)；
wherein h isicsThe enthalpy of the outlet water of the heat supply heater h in the non-steam extraction mode of any unit iijsThe enthalpy of the inlet water of the heat supply heater in the non-steam extraction mode of any unit i.
Optionally, the non-extraction means is a high back pressure and/or heat pump.
Optionally, the S103 includes:
calculating available energy consumed when each unit provides corresponding heat supply quantity;
wherein, any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met: ei＝f(hi,his,si,tih,sih)；
hiIs the extraction enthalpy, h, of said set iisIs the return enthalpy, s, of said set iiIs the extraction entropy, t, of any unit iihReturn water temperature, s, during heat supply to said unit iihThe return water entropy of any unit i is obtained;
alternatively, the first and second electrodes may be,
any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met:
Ei＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)；
Pifor the heat-supply extraction pressure, T, of said set iiFor the heating extraction temperature, p, of said unit iipExhaust pressure, t, during heat supply to said unit iipExhaust temperature, t, during heat supply to said unit iigSupply water temperature f for the circulating water of the heat supply network during the heat supply of any unit iiThe circulating water flow of the heat supply network of any unit i;
alternatively, the first and second electrodes may be,
any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met:
Ei＝f(Pi,Ti,pip,tip,tih,pih,fi)；
pihand (3) the return water pressure during heat supply for any unit i.
Alternatively,
Ei＝f(hi,his,si,tih,sih,fi)-[hi-his-tih×(si-sih)]×fi；
Ei＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)
＝(Pi-pip)×Ti×[hi-(tip+tig-tih)×(si-sih)]×fi；
Figure BDA0001786832530000031
optionally, the S104 includes:
for any of the units i,
Figure BDA0001786832530000041
wherein the content of the first and second substances,
Figure BDA0001786832530000042
is the heat supply energy loss index of any unit i, EiIs the available energy of any unit i, GiThe heat supply amount of any unit i.
Optionally, the S105 includes:
s105-1-1, according to the sequence from small to large
Figure BDA0001786832530000043
Sorting;
s105-1-2, selecting the minimum
Figure BDA0001786832530000044
S105-1-3, selected according to preset step length
Figure BDA0001786832530000045
The corresponding units distribute the heat load and determine the selected one after each distribution of the heat load
Figure BDA0001786832530000046
Current heat supply extraction amount of corresponding unit, when selected
Figure BDA0001786832530000047
When the current heat supply air extraction quantity of the corresponding unit is the maximum quantity, or when no heat load is distributed, the step is terminated;
s105-1-4, if the thermal load distribution still exists, reselecting the selected one which is ranked next to the selected one
Figure BDA00017868325300000410
Is/are as follows
Figure BDA00017868325300000411
S105-1-3 is repeatedly performed.
Optionally, the S105 includes:
s105-2-1, determining the current heat supply air extraction amount of each unit and the maximum heat supply air extraction amount of each unit;
s105-2-2, determining the difference between the maximum heat supply air extraction amount of each unit and the corresponding current heat supply air extraction amount as a first distribution parameter of each unit;
s105-2-3, and combining each unit
Figure BDA0001786832530000048
With all units
Figure BDA0001786832530000049
The quotient of the sums is determined as a second distribution parameter of each unit;
s105-2-4, calculating the ratio of the first distribution parameter of each unit to the corresponding second distribution parameter;
s105-2-5, sorting the ratio values from small to large;
s105-2-6, selecting the minimum ratio;
s105-2-7, distributing heat load to the unit corresponding to the selected ratio according to a preset step length, determining the current heat supply air extraction quantity of the unit corresponding to the selected ratio after distributing the heat load, and terminating the step when the current heat supply air extraction quantity of the unit corresponding to the selected ratio is the maximum quantity or when no heat load is distributed;
s105-2-8, if the thermal load distribution still exists, the ratio which is ranked next to the selected ratio is reselected, and S105-2-7 is executed repeatedly.
In order to achieve the above purpose, the main technical solution adopted by the present invention further comprises:
an electronic device comprising a memory, a processor, a bus and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the above methods when executing the program.
In order to achieve the above purpose, the main technical solution adopted by the present invention further comprises:
a computer storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods as described above.
(III) advantageous effects
The invention has the beneficial effects that: the heat supply capacity of each unit is determined according to the heat supply steam extraction capacity during heat supply, the heat supply energy loss index of each unit is obtained based on the heat supply capacity and the available energy consumed during the heat supply capacity of each unit, and heat load optimal distribution is carried out according to the heat supply energy loss index of each unit, so that heat load distribution is not carried out blindly any more.
Drawings
Fig. 1 is a schematic flow chart of a method for optimizing and distributing a thermal load according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of another thermal load optimization allocation method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Aiming at the condition that the heat load adjustment in a multi-unit or multi-unit multi-element heat supply mode of a thermal power plant has great blindness, the proposal provides a heat load optimal distribution method, electronic equipment, a storage medium, electronic equipment and a storage medium, the heat supply quantity of each unit is determined according to the heat supply steam extraction quantity during the heat supply, the heat supply energy loss index of each unit is obtained based on the heat supply quantity and the available energy consumed during the heat supply quantity of each unit, and the heat load optimal distribution is carried out according to the heat supply energy loss index of each unit.
Referring to fig. 1, the implementation flow of the heat load optimization allocation method provided in this embodiment is as follows:
and S101, acquiring heat supply parameters of each unit.
Wherein, the heat supply parameters comprise heat supply steam extraction amount, heat supply steam extraction enthalpy, heat supply steam extraction drainage enthalpy and heat supply amount in a non-steam extraction mode during heat supply. Or the heat supply parameters comprise heat supply network circulating water flow, heat supply network water supply enthalpy and heat supply network return water enthalpy.
Wherein the non-extraction mode is a high back pressure and/or a heat pump.
Namely, the heat supply parameters are heat supply steam extraction amount, heat supply steam extraction enthalpy, heat supply steam extraction hydrophobic enthalpy and heat supply amount in a non-steam extraction mode (such as high back pressure, like a heat pump, like a high back pressure and a heat pump).
The present embodiment does not limit the specific content of the heating parameter.
And S102, calculating the heat supply amount of each unit according to the heat supply parameters of each unit.
For example, when the heat supply parameters include heat supply extraction steam quantity during heat supply, heat supply extraction steam enthalpy, heat supply extraction steam drainage enthalpy, and heat supply quantity in a non-steam extraction mode, for any unit i, the heat supply quantity calculation formula of any unit i is as follows:
Gi＝Fi·(hig-hih)+Gi'；
wherein G isiHeat supply to any unit i, FiFor the quantity of steam extracted for heat supply during the heat supply period of any unit i, higFor the heat-supply extraction enthalpy, h, of any unit iihFor the heat supply, extraction and drainage enthalpy, G, of any unit ii' is the heat supply of any unit i in a non-extraction mode.
Gi' can be calculated by the following formula:
Gi'＝Firw×(hics-hijs)；
wherein h isicsThe enthalpy of the outlet water of the heat supply heater h in the non-steam extraction mode of any unit iijsThe enthalpy of the inlet water of the heat supply heater in the non-steam extraction mode of any unit i.
Wherein the non-extraction mode is a high back pressure and/or a heat pump.
I.e. hicsThe enthalpy, h, of the water outlet of the heating heater in the non-extraction mode (e.g. high back pressure, like heat pump, like high back pressure and heat pump) of any unit iijsThe enthalpy of the inlet water of the heating heater under the non-steam extraction mode (such as high back pressure, like a heat pump, like high back pressure and a heat pump).
When the heat supply parameters comprise heat supply network circulating water flow, heat supply network water supply enthalpy and heat supply network water return enthalpy, for any unit i, a heat supply amount calculation formula of any unit i is as follows:
Gi＝Firw×(higs-hihs)；
wherein, FirwThe circulating water flow h of the heat supply network of any unit iigsSupply of water enthalpy, h, to the heat supply network of any unit iihsThe return enthalpy of the heat supply network of any unit i.
And S103, calculating available energy consumed by each unit during heat supply.
The available energy consumed in the step of calculating the heat supply amount of each unit is the available energy consumed in the step of calculating the heat supply amount corresponding to each unit.
For any of the units i,
one way to calculate its available energy is: heat source pressure P supplied by unitiTemperature T of heat supply steam extractioniEstablishment of Ei＝f(Pi,Ti) According to the direct proportion relation N between the convertible electric energy and the available energyi∝EiAnd the evaluation index of the unit energy utilization rate is obtained under the condition of not comprehensively calculating the overall power generation energy consumption of the system
Figure BDA0001786832530000071
Because the heating modes of all the heating units are different under the multi-element heating mode, the available energy E is obtainedi＝f(Pi,Ti) Not only the rationality of the calculation reference is fully considered in the calculation, but also the relation between the heating effect and the investment income is considered, so the proposal provides another heating energy loss index
Figure BDA0001786832530000072
The calculation scheme of (1).
Namely, the heat supply energy loss index of each unit is calculated based on the heat supply amount and the available energy.
Available energy in this scheme EiAvailable energy E, unlike available energy in thermodynamicsiThe calculation of (2) introduces thermal parameters such as the circulating water temperature, enthalpy and entropy of the heat supply network, so that the numerical value can more accurately reflect the energy grade and the working capacity of the heat supply heat source.
Specifically, any unit i provides corresponding heat supply amount GiAvailable energy consumed in time EiOne of three models may be followed:
the first model is: ei＝f(hi,his,si,tih,sih,fi)；
Wherein h isiIs the extraction enthalpy, h, of said set iisIs the return enthalpy, s, of said set iiIs the extraction entropy, t, of any unit iihReturn water temperature, s, during heat supply to said unit iihIs the return water entropy f of any unit iiThe circulating water flow of the heat supply network of any unit i.
In particular, Ei＝f(hi,his,si,tih,sih,fi)＝[hi-his-tih×(si-sih)]×fi。
The second model is as follows: ei＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)；
Wherein, PiFor heat supply extraction pressure, T, of any unit iiFor the heating extraction temperature, p, of any unit iipExhaust pressure, t, during heat supply to any unit iipExhaust temperature, t, during heat supply to any unit iigSupply water temperature, s, for circulating water of heat supply network during heat supply of any unit iihThe return water entropy of any unit i.
The method provides GiAvailable energy E consumed by the unit during heatingiA mathematical calculation model of time and temperature, not only utilizes the heat supply extraction pressure PiTemperature T of heat supply steam extractioniEnthalpy of extraction hiEntropy of steam extraction siAnd also introduces the unit exhaust pressure p during heat supplyipExhaust temperature tipAnd the temperature t of the circulating water supply of the heat supply networkigTemperature t of return waterihEntropy of return water sihAnd the flow f of the circulating water of the heat supply networkiAnd the like.
In particular, Ei＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)
＝(Pi-pip)×Ti×[hi-(tip+tig-tih)×(si-sih)]×fi。
The third model is as follows: ei＝f(Pi,Ti,pip,tip,tih,pih,fi)；
Wherein p isihAnd (3) the return water pressure during heat supply for any unit i.
In particular, Ei＝f(Pi,Ti,pip,tip,tih,pih,fi)
＝{f(Pi,Ti)-f(pip,tip)-tih×[f'(Pi,Ti)-f'(pih,tih)]}×fi。
F (A, B) ═ e in the third modelA×eBWherein A represents only one parameter, and may be PiMay also be pipOther parameters may be used, and the present embodiment does not limit the parameters specifically represented by a. B also represents only one parameter, and may be TiMay also be tipOther parameters may be used, and the present embodiment does not limit the parameters specifically represented by B.
In addition, f' () is the derivative of f (). From the concept of derivative, f (A, B) ═ eA×eBDerivative f' (A, B) ═ eA)'×eB+eA×(eB)'. And (e)A)'＝eA，(eB)'＝eB. Therefore, the temperature of the molten metal is controlled,
Figure BDA0001786832530000081
and S104, calculating the heat supply energy loss index of each unit according to the heat supply amount and the available energy of each unit.
In the calculation of the heating energy loss index, the key is to determine the available energy.
Defining the consumed available energy EiAnd heat supply quantity GiRatio E ofi/GiFor heat supply energy loss index
Figure BDA0001786832530000091
And evaluating the utilization rate of available energy in heat supply by using the heat supply energy loss index, and finally obtaining the heat supply evaluation result of each unit.
I.e. for any of the units i,
Figure BDA0001786832530000092
wherein the content of the first and second substances,
Figure BDA0001786832530000093
for the heat supply energy loss index of any unit i, EiAvailable energy for any unit i, GiThe heat supply amount of any unit i.
And S105, performing heat load optimal distribution according to the heat supply energy loss index of each unit.
For example, the unit with the lowest heat loss index carries the most heat load.
Specifically, the method can be realized through the following processes:
s105-1-1, according to the sequence from small to large
Figure BDA0001786832530000094
And (6) sorting.
S105-1-2, selecting the minimum
Figure BDA0001786832530000095
S105-1-3, selected according to preset step length
Figure BDA0001786832530000096
The corresponding units distribute the heat load and determine the selected one after each distribution of the heat load
Figure BDA0001786832530000097
Current heat supply extraction amount of corresponding unit, when selected
Figure BDA0001786832530000098
And when the current heat supply extraction amount of the corresponding unit is the maximum amount, or when no heat load is distributed, terminating the step.
In this step, the selected
Figure BDA00017868325300000916
After the corresponding unit distributes the heat load with the preset step length, the selected unit is determined
Figure BDA0001786832530000099
The current heat supply air extraction quantity of the corresponding unit is determined
Figure BDA00017868325300000910
Whether the current heat supply air extraction amount of the corresponding unit is the maximum amount (can be opened through a valve)And (4) judging the degree, if the opening degree is maximum, determining that the current heat supply air extraction amount is the maximum amount, and otherwise, determining that the current heat supply air extraction amount is not the maximum amount).
If determined to be selected
Figure BDA00017868325300000911
If the current heat supply air extraction quantity of the corresponding unit is not the maximum quantity, the selected unit is heated again
Figure BDA00017868325300000912
The corresponding unit is assigned a thermal load of a predetermined step length, after which the selected unit is determined
Figure BDA00017868325300000913
The current heat supply air extraction quantity of the corresponding unit is determined
Figure BDA00017868325300000914
If the current heat supply air extraction amount of the corresponding unit is the maximum amount, the process is circulated until the current heat supply air extraction amount is selected
Figure BDA00017868325300000915
And when the current heat supply extraction amount of the corresponding unit is the maximum amount, or when no heat load is distributed, terminating the step.
S105-1-4, if the thermal load distribution still exists, reselecting the selected one which is ranked next to the selected one
Figure BDA00017868325300000917
Is/are as follows
Figure BDA00017868325300000918
S105-1-3 is repeatedly performed.
If the thermal load distribution is still available after the termination of S105-1-3, which indicates that the thermal load distribution is not completed, the selection order is next to the just selected one
Figure BDA0001786832530000101
Is/are as follows
Figure BDA0001786832530000102
(i.e., greater than that just selected)
Figure BDA0001786832530000103
All of
Figure BDA0001786832530000104
The smallest of them), S105-1-3 is repeatedly performed until all the thermal loads are distributed.
S105-1-1 to S105-1-4, index of heat loss of all heat supply units of thermal power plant
Figure BDA0001786832530000105
The comparison is carried out in such a way that,
Figure BDA0001786832530000106
the smallest unit is the unit with the highest heat supply efficiency in all the heat supply units.
Thus according to
Figure BDA0001786832530000107
The thermal load is adjusted in order from small to large. When the whole factory realizes pressing
Figure BDA0001786832530000108
The thermal load being adjusted in order from small to large, i.e.
Figure BDA0001786832530000109
The smallest unit can realize the smallest available energy loss under the same heat load when the smallest unit is provided with the heat load as much as possible
Figure BDA00017868325300001010
Thereby achieving an optimal distribution of the thermal load of the thermal power plant.
In addition to the above process, it can be realized by the following process:
and S105-2-1, determining the current heat supply air extraction amount of each unit and the maximum heat supply air extraction amount of each unit.
And S105-2-2, determining the difference between the maximum heat supply air extraction amount of each unit and the corresponding current heat supply air extraction amount as a first distribution parameter of each unit.
And the first distribution parameter of the unit i is the maximum heat supply air extraction amount of the unit i-the current heat supply air extraction amount of the unit i.
S105-2-3, and combining each unit
Figure BDA00017868325300001012
With all units
Figure BDA00017868325300001013
The quotient of the sums is determined as the second allocation parameter for each unit.
Figure BDA00017868325300001011
And S105-2-4, calculating the ratio of the first distribution parameter of each unit to the corresponding second distribution parameter.
The ratio of the unit i is the first allocation parameter of the unit i/the second allocation parameter of the unit i.
S105-2-5, sorting the ratio values from small to large.
S105-2-6, and selecting the minimum ratio.
S105-2-7, distributing heat load to the unit corresponding to the selected ratio according to the preset step length, determining the current heat supply air extraction amount of the unit corresponding to the selected ratio after distributing the heat load, and terminating the step when the current heat supply air extraction amount of the unit corresponding to the selected ratio is the maximum amount or when no heat load is distributed.
S105-2-8, if the thermal load distribution still exists, the ratio which is ranked next to the selected ratio is reselected, and S105-2-7 is executed repeatedly.
And S105-2-1 to S105-2-8, comparing the ratio of the first distribution parameter and the corresponding second distribution parameter of all the heat supply units of the thermal power plant, wherein the unit with the minimum ratio is the unit with the highest heat supply efficiency in all the heat supply units. Since the first distribution parameter is the difference between the maximum heat extraction and the corresponding current heat extraction of each unit, the second distribution parameter is for each unit
Figure BDA0001786832530000112
With all units
Figure BDA0001786832530000113
The quotient of the sums, and therefore, the greater the difference between the current heat extraction and the maximum heat extraction,
Figure BDA0001786832530000114
the smaller the ratio, the larger the ratio. The maximum heat load of the unit with the minimum heat energy loss index is realized.
In order to verify the method of the present invention, the following flow shown in fig. 2 is taken as an example to perform heat load optimization distribution on a certain heat supply unit, and the obtained calculation results are shown in table 1, and the calculation results of energy saving benefits before and after optimization are shown in table 2.
Specifically, this unit is 300MW subcritical heat supply unit, and the unit original design steam extraction heat supply parameter is: the rated steam extraction flow is 400t/h, the heat supply steam extraction pressure is 0.3325MPa, the heat supply steam extraction temperature is 248.8 ℃, and the heat supply drainage temperature is 135.7 ℃. The unit is improved by a heat pump, the heat pump is used for absorbing the heat of the exhausted steam of the low-pressure cylinder for supplying heat, the heat supply coefficient of the heat pump is 1.8, and the heat pump drives a steam source to be an original heat supply steam extraction steam source.
TABLE 1
Figure BDA0001786832530000111
Figure BDA0001786832530000121
TABLE 2
Figure BDA0001786832530000122
The data in the tables 1 and 2 can be used for carrying out the optimized distribution of the heat load according to the heat supply energy loss index, so that the economic benefit of the thermal power plant can be effectively improved.
The method provided by the invention determines the heat supply amount of each unit according to the heat supply steam extraction amount during the heat supply period, obtains the heat supply energy loss index of each unit based on the heat supply amount and the available energy consumed during the heat supply amount of each unit, and performs heat load optimal distribution according to the heat supply energy loss index of each unit, so that the heat load distribution is not performed blindly.
Referring to fig. 3, the present embodiment provides an electronic apparatus including: memory 301, processor 302, bus 303, and computer programs stored on memory 301 and executable on processor 302.
The processor 302, when executing the program, implements the following method:
s101, obtaining heat supply parameters of each unit, wherein the heat supply parameters comprise heat supply steam extraction amount, heat supply steam extraction enthalpy, heat supply steam extraction drainage enthalpy and heat supply amount in a non-steam extraction mode during heat supply, or the heat supply parameters comprise heat supply network circulating water flow, heat supply network water supply enthalpy and heat supply network water return enthalpy;
s102, calculating the heat supply amount of each unit according to the heat supply parameters of each unit;
s103, calculating available energy consumed by each unit during heat supply;
s104, calculating the heat supply energy loss index of each unit according to the heat supply amount and the available energy of each unit;
s105, performing heat load optimal distribution according to the heat supply energy loss index of each unit;
when the heat supply parameter includes a heat supply extraction amount, a heat supply extraction enthalpy, a heat supply extraction hydrophobic enthalpy, and a heat supply amount in a non-extraction manner during the heat supply, S102 includes:
for any unit i, the heat supply amount calculation formula of any unit i is as follows:
Gi＝Fi×(hig-hih)+Gi'；
wherein G isiHeat supply to any unit i, FiFor the quantity of steam extracted for heat supply during the heat supply period of any unit i, higFor the heat-supply extraction enthalpy, h, of any unit iihFor the heat supply, extraction and drainage enthalpy, G, of any unit ii' is non-extraction of any unit iHeat supply under the mode;
when the heat supply parameters include heat supply network circulating water flow, heat supply network water supply enthalpy and heat supply network water return enthalpy, S102 includes:
for any unit i, the heat supply amount calculation formula of any unit i is as follows:
Gi＝Firw×(higs-hihs)；
wherein, FirwThe circulating water flow h of the heat supply network of any unit iigsSupply of water enthalpy, h, to the heat supply network of any unit iihsThe return enthalpy of the heat supply network of any unit i.
Alternatively, Gi' is calculated by the following formula:
Gi'＝Firw×(hics-hijs)；
wherein h isicsThe enthalpy of the outlet water of the heat supply heater h in the non-steam extraction mode of any unit iijsThe enthalpy of the inlet water of the heat supply heater in the non-steam extraction mode of any unit i.
Optionally, the non-extraction means is a high back pressure and/or heat pump.
Optionally, S103 includes:
calculating available energy consumed when each unit provides corresponding heat supply quantity;
wherein, any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met: ei＝f(hi,his,si,tih,sih,fi)；
hiIs the extraction enthalpy, h, of any unit iisIs the return enthalpy, s, of any unit iiIs the extraction entropy, t, of any unit iihReturn water temperature during heat supply to any unit i, sihIs the return water entropy f of any unit iiThe circulating water flow of the heat supply network of any unit i;
alternatively, the first and second electrodes may be,
any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met:
Ei＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)；
Pifor heat supply extraction pressure, T, of any unit iiFor the heating extraction temperature, p, of any unit iipExhaust pressure, t, during heat supply to any unit iipExhaust temperature, t, during heat supply to any unit iigSupplying water temperature to the circulating water of the heat supply network during heat supply of any unit i;
alternatively, the first and second electrodes may be,
any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met:
Ei＝f(Pi,Ti,pip,tip,tih,pih,fi)；
pihthe water return pressure during heat supply for any unit i.
Alternatively,
Ei＝f(hi,his,si,tih,sih,fi)＝[hi-his-tih×(si-sih)]×fi；
Ei＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)
＝(Pi-pip)×Ti×[hi-(tip+tig-tih)×(si-sih)]×fi；
Figure BDA0001786832530000141
optionally, S104 includes:
for any of the units i,
Figure BDA0001786832530000151
wherein the content of the first and second substances,
Figure BDA0001786832530000152
for the heat supply energy loss index of any unit i, EiAvailable energy for any unit i, GiThe heat supply amount of any unit i.
Optionally, S105 includes:
s105-1-1, according to the sequence from small to large
Figure BDA0001786832530000153
Sorting;
s105-1-2, selecting the minimum
Figure BDA0001786832530000154
S105-1-3, selected according to preset step length
Figure BDA0001786832530000155
The corresponding units distribute the heat load and determine the selected one after each distribution of the heat load
Figure BDA0001786832530000156
Current heat supply extraction amount of corresponding unit, when selected
Figure BDA0001786832530000157
When the current heat supply air extraction quantity of the corresponding unit is the maximum quantity, or when no heat load is distributed, the step is terminated;
s105-1-4, if the thermal load distribution still exists, reselecting the selected one which is ranked next to the selected one
Figure BDA0001786832530000158
Is/are as follows
Figure BDA0001786832530000159
S105-1-3 is repeatedly performed.
Optionally, S105 includes:
s105-2-1, determining the current heat supply air extraction amount of each unit and the maximum heat supply air extraction amount of each unit;
s105-2-2, determining the difference between the maximum heat supply air extraction amount of each unit and the corresponding current heat supply air extraction amount as a first distribution parameter of each unit;
s105-2-3, and combining each unit
Figure BDA00017868325300001510
With all units
Figure BDA00017868325300001511
The quotient of the sums is determined as a second distribution parameter of each unit;
s105-2-4, calculating the ratio of the first distribution parameter of each unit to the corresponding second distribution parameter;
s105-2-5, sorting the ratio values from small to large;
s105-2-6, selecting the minimum ratio;
s105-2-7, distributing heat load to the unit corresponding to the selected ratio according to a preset step length, determining the current heat supply air extraction quantity of the unit corresponding to the selected ratio after distributing the heat load, and terminating the step when the current heat supply air extraction quantity of the unit corresponding to the selected ratio is the maximum quantity or when no heat load is distributed;
s105-2-8, if the thermal load distribution still exists, the ratio which is ranked next to the selected ratio is reselected, and S105-2-7 is executed repeatedly.
The electronic equipment that this embodiment provided, heat supply capacity of each unit is confirmed according to the heat supply steam extraction volume during the heat supply, heat supply steam extraction enthalpy, heat supply steam extraction drainage enthalpy, the heat supply capacity under the non-steam extraction mode, and the heat supply capacity that consumes when based on heat supply capacity and each unit heat supply capacity loses the index, loses the index and carries out heat load optimal distribution according to the heat supply capacity of each unit for no longer blindly carry out heat load distribution.
The present embodiments provide a computer storage medium that may be located on the robot or separate from the robot. The computer storage medium may be connected to the robot via a bus, may be connected to the robot via a wireless link, or may be connected to the robot via another link.
The computer storage medium performs the following operations:
s101, obtaining heat supply parameters of each unit, wherein the heat supply parameters comprise heat supply steam extraction amount, heat supply steam extraction enthalpy, heat supply steam extraction drainage enthalpy and heat supply amount in a non-steam extraction mode during heat supply, or the heat supply parameters comprise heat supply network circulating water flow, heat supply network water supply enthalpy and heat supply network water return enthalpy;
s102, calculating the heat supply amount of each unit according to the heat supply parameters of each unit;
s103, calculating available energy consumed by each unit during heat supply;
s104, calculating the heat supply energy loss index of each unit according to the heat supply amount and the available energy of each unit;
s105, performing heat load optimal distribution according to the heat supply energy loss index of each unit;
when the heat supply parameter includes a heat supply extraction amount, a heat supply extraction enthalpy, a heat supply extraction hydrophobic enthalpy, and a heat supply amount in a non-extraction manner during the heat supply, S102 includes:
for any unit i, the heat supply amount calculation formula of any unit i is as follows:
Gi＝Fi×(hig-hih)+Gi'；
wherein G isiHeat supply to any unit i, FiFor the quantity of steam extracted for heat supply during the heat supply period of any unit i, higFor the heat-supply extraction enthalpy, h, of any unit iihFor the heat supply, extraction and drainage enthalpy, G, of any unit iiThe heat supply amount of any unit i in a non-steam extraction mode is provided;
when the heat supply parameters include heat supply network circulating water flow, heat supply network water supply enthalpy and heat supply network water return enthalpy, S102 includes:
for any unit i, the heat supply amount calculation formula of any unit i is as follows:
Gi＝Firw×(higs-hihs)；
wherein, FirwThe circulating water flow h of the heat supply network of any unit iigsSupply of water enthalpy, h, to the heat supply network of any unit iihsThe return enthalpy of the heat supply network of any unit i.
Alternatively, Gi' is calculated by the following formula:
Gi'＝Firw×(hics-hijs)；
wherein h isicsThe enthalpy of the outlet water of the heat supply heater h in the non-steam extraction mode of any unit iijsThe enthalpy of the inlet water of the heat supply heater in the non-steam extraction mode of any unit i.
Optionally, the non-extraction means is a high back pressure and/or heat pump.
Optionally, S103 includes:
calculating available energy consumed when each unit provides corresponding heat supply quantity;
wherein, any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met: ei＝f(hi,his,si,tih,sih,fi)；
hiIs the extraction enthalpy, h, of any unit iisIs the return enthalpy, s, of any unit iiIs the extraction entropy, t, of any unit iihReturn water temperature during heat supply to any unit i, sihIs the return water entropy f of any unit iiThe circulating water flow of the heat supply network of any unit i;
alternatively, the first and second electrodes may be,
any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met:
Ei＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)；
Pifor heat supply extraction pressure, T, of any unit iiFor the heating extraction temperature, p, of any unit iipExhaust pressure, t, during heat supply to any unit iipExhaust temperature, t, during heat supply to any unit iigDuring heating of any unit iThe water supply temperature of the circulating water of the heat supply network;
alternatively, the first and second electrodes may be,
any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met:
Ei＝f(Pi,Ti,pip,tip,tih,pih,fi)；
pihthe water return pressure during heat supply for any unit i.
Alternatively,
Ei＝f(hi,his,si,tih,sih,fi)＝[hi-his-tih×(si-sih)]×fi；
Ei＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)
＝(Pi-pip)×Ti×[hi-(tip+tig-tih)×(si-sih)]×fi；
Figure BDA0001786832530000181
optionally, S104 includes:
for any of the units i,
Figure BDA0001786832530000182
wherein the content of the first and second substances,
Figure BDA0001786832530000183
for the heat supply energy loss index of any unit i, EiAvailable energy for any unit i, GiThe heat supply amount of any unit i.
Optionally, S105 includes:
s105-1-1, according to the sequence from small to large
Figure BDA0001786832530000184
Sorting;
s105-1-2, selecting the minimum
Figure BDA0001786832530000185
S105-1-3, selected according to preset step length
Figure BDA0001786832530000187
The corresponding units distribute the heat load and determine the selected one after each distribution of the heat load
Figure BDA0001786832530000186
Current heat supply extraction amount of corresponding unit, when selected
Figure BDA0001786832530000188
When the current heat supply air extraction quantity of the corresponding unit is the maximum quantity, or when no heat load is distributed, the step is terminated;
s105-1-4, if the thermal load distribution still exists, reselecting the selected one which is ranked next to the selected one
Figure BDA00017868325300001810
Is/are as follows
Figure BDA0001786832530000189
S105-1-3 is repeatedly performed.
Optionally, S105 includes:
s105-2-1, determining the current heat supply air extraction amount of each unit and the maximum heat supply air extraction amount of each unit;
s105-2-2, determining the difference between the maximum heat supply air extraction amount of each unit and the corresponding current heat supply air extraction amount as a first distribution parameter of each unit;
s105-2-3, and combining each unit
Figure BDA00017868325300001811
With all units
Figure BDA00017868325300001812
The quotient of the sums is determined as a second distribution parameter of each unit;
s105-2-4, calculating the ratio of the first distribution parameter of each unit to the corresponding second distribution parameter;
s105-2-5, sorting the ratio values from small to large;
s105-2-6, selecting the minimum ratio;
s105-2-7, distributing heat load to the unit corresponding to the selected ratio according to a preset step length, determining the current heat supply air extraction quantity of the unit corresponding to the selected ratio after distributing the heat load, and terminating the step when the current heat supply air extraction quantity of the unit corresponding to the selected ratio is the maximum quantity or when no heat load is distributed;
s105-2-8, if the thermal load distribution still exists, the ratio which is ranked next to the selected ratio is reselected, and S105-2-7 is executed repeatedly.
The computer storage medium provided by the embodiment determines the heat supply amount of each unit according to the heat supply extraction amount, the heat supply extraction enthalpy, the heat supply extraction drainage enthalpy and the heat supply amount in a non-extraction mode during heat supply, obtains the heat supply energy loss index of each unit based on the heat supply amount and the available energy consumed during the heat supply amount of each unit, and performs heat load optimal distribution according to the heat supply energy loss index of each unit, so that heat load distribution is not performed blindly.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A heat load optimal distribution method is applied to a multi-element heating mode and comprises the following steps:
s101, obtaining heat supply parameters of each unit, wherein the heat supply parameters comprise heat supply steam extraction amount, heat supply steam extraction enthalpy, heat supply steam extraction drainage enthalpy and heat supply amount in a non-steam extraction mode during heat supply, or the heat supply parameters comprise heat supply network circulating water flow, heat supply network water supply enthalpy and heat supply network water return enthalpy;
s102, calculating the heat supply amount of each unit according to the heat supply parameters of each unit;
s103, calculating available energy consumed by each unit during heat supply;
s104, calculating the heat supply energy loss index of each unit according to the heat supply amount and the available energy of each unit;
s105, performing heat load optimal distribution according to the heat supply energy loss index of each unit;
when the heat supply parameter includes a heat supply extraction amount, a heat supply extraction enthalpy, a heat supply extraction hydrophobic enthalpy, and a heat supply amount in a non-extraction manner during the heat supply, the S102 includes:
for any unit i, the heat supply amount calculation formula of any unit i is as follows:
Gi＝Fi×(hig-hih)+G'i；
wherein G isiFor the heat supply of said any unit i, FiAmount of heat extraction h during heat supply to said unit iigFor the heat-supply extraction enthalpy, h, of said set iihIs the heat supply steam extraction hydrophobic enthalpy, G 'of any unit i'iThe heat supply amount of any unit i in a non-steam extraction mode is provided;
when the heat supply parameters include a heat supply network circulating water flow, a heat supply network water supply enthalpy and a heat supply network water return enthalpy, the S102 includes:
for any unit i, the heat supply amount calculation formula of any unit i is as follows:
Gi＝Firw×(higs-hihs)；
wherein, FirwThe flow rate h of the circulating water of the heat supply network of any unit iigsSupply water enthalpy, h, to the heat supply network of any of the units iihsAnd (4) the return water enthalpy of the heat supply network of any unit i.
2. The method of claim 1, wherein G isi' is calculated by the following formula:
G'i＝Firw×(hics-hijs)；
wherein h isicsThe enthalpy of the outlet water of the heat supply heater h in the non-steam extraction mode of any unit iijsThe enthalpy of the inlet water of the heat supply heater in the non-steam extraction mode of any unit i.
3. A method according to claim 1 or 2, wherein the non-extraction means is a high back pressure and/or heat pump.
4. The method according to claim 1, wherein the S103 comprises:
calculating available energy consumed when each unit provides corresponding heat supply quantity;
wherein, any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met: ei＝f(hi,his,si,tih,sih,fi)；
Wherein E isi＝f(hi,his,si,tih,sih,fi)＝[hi-his-tih×(si-sih)]×fi；
hiIs the extraction enthalpy, h, of said set iisIs the return enthalpy, s, of said set iiIs the extraction entropy, t, of any unit iihReturn water temperature, s, during heat supply to said unit iihIs the return water entropy f of any unit iiThe circulating water flow of the heat supply network of any unit i;
alternatively, the first and second electrodes may be,
any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met:
Ei＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)；
wherein E isi＝f(Pi,Ti,hi,si,pip,tip,tig,tih,sih,fi)
＝(Pi-pip)×Ti×[hi-(tip+tig-tih)×(si-sih)]×fi；
PiFor the heat-supply extraction pressure, T, of said set iiFor the heating extraction temperature, p, of said unit iipExhaust pressure, t, during heat supply to said unit iipExhaust temperature, t, during heat supply to said unit iigSupplying water temperature to the circulating water of the heat supply network during heat supply of any unit i;
alternatively, the first and second electrodes may be,
any unit i provides corresponding heat supply GiAvailable energy consumed in time EiThe following model is met:
Ei＝f(Pi,Ti,pip,tip,tih,pih,fi)；
wherein the content of the first and second substances,
Figure FDA0003078332530000021
Figure FDA0003078332530000022
pihand (3) the return water pressure during heat supply for any unit i.
5. The method of claim 1, wherein the S104 comprises:
for any of the units i,
Figure FDA0003078332530000031
wherein the content of the first and second substances,
Figure FDA0003078332530000032
is the heat supply energy loss index of any unit i, EiIs the available energy of any unit i.
6. The method according to claim 5, wherein the S105 comprises:
s105-1-1, according to the sequence from small to large
Figure FDA0003078332530000033
Sorting;
s105-1-2, selecting the minimum
Figure FDA0003078332530000034
S105-1-3, selected according to preset step length
Figure FDA0003078332530000035
The corresponding units distribute the heat load and determine the selected one after each distribution of the heat load
Figure FDA0003078332530000036
Current heat supply extraction amount of corresponding unit, when selected
Figure FDA0003078332530000037
When the current heat supply air extraction quantity of the corresponding unit is the maximum quantity, or when no heat load is distributed, the step is terminated;
s105-1-4, if the thermal load distribution still exists, reselecting the selected one which is ranked next to the selected one
Figure FDA0003078332530000038
Is/are as follows
Figure FDA0003078332530000039
S105-1-3 is repeatedly performed.
7. The method according to claim 5, wherein the S105 comprises:
s105-2-1, determining the current heat supply air extraction amount of each unit and the maximum heat supply air extraction amount of each unit;
s105-2-2, determining the difference between the maximum heat supply air extraction amount of each unit and the corresponding current heat supply air extraction amount as a first distribution parameter of each unit;
s105-2-3, and combining each unit
Figure FDA00030783325300000310
With all units
Figure FDA00030783325300000311
The quotient of the sums is determined as a second distribution parameter of each unit;
s105-2-4, calculating the ratio of the first distribution parameter of each unit to the corresponding second distribution parameter;
s105-2-5, sorting the ratio values from small to large;
s105-2-6, selecting the minimum ratio;
s105-2-7, distributing heat load to the unit corresponding to the selected ratio according to a preset step length, determining the current heat supply air extraction quantity of the unit corresponding to the selected ratio after distributing the heat load, and terminating the step when the current heat supply air extraction quantity of the unit corresponding to the selected ratio is the maximum quantity or when no heat load is distributed;
s105-2-8, if the thermal load distribution still exists, the ratio which is ranked next to the selected ratio is reselected, and S105-2-7 is executed repeatedly.
8. An electronic device comprising a memory, a processor, a bus and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of claims 1-7 when executing the program.
9. A computer storage medium having a computer program stored thereon, characterized in that: the program when executed by a processor implementing the steps of any of claims 1 to 7.
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