CN112069677A - Method, device and equipment for determining running mode of cold end circulating pump of power plant and storage medium - Google Patents
Method, device and equipment for determining running mode of cold end circulating pump of power plant and storage medium Download PDFInfo
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Abstract
The embodiment of the invention discloses a method, a device, equipment and a storage medium for determining a running mode of a cold end circulating pump of a power plant. The method comprises the following steps: acquiring cold end operation data of the two coupled units; constructing a net power model of the power plant based on the cold end operational data; and obtaining optimization requirements, and determining the running mode of the cold end circulating pump based on the optimization requirements and the net power model. According to the method for determining the cold end circulating pump operation mode of the power plant, the net power model of the power plant is built based on the cold end operation data, the cold end circulating pump operation mode is determined based on the net power model according to actual optimization requirements, the characteristics of two coupled units are considered in the cold end circulating pump operation mode, and the adaptability to the optimization requirements of a two-unit coupling cold end system is better.
Description
Technical Field
The invention belongs to the technical field of cold end optimization of power plants, and particularly relates to a method, a device, equipment and a storage medium for determining a running mode of a cold end circulating pump of a power plant.
Background
The deep energy conservation and emission reduction is the necessary choice of the thermal power generating unit under the influence of fuel price and environmental protection policy. The cold end system is an important component of the thermal generator set, and has great energy-saving potential.
The purpose of cold end optimization is to find the optimal circulating pump operation mode under different unit loads and different circulating water temperatures. The majority of the existing large thermal power generating units exist in a double-machine mode, and circulating water is connected through a communication door to form a coupling system.
The search in the prior art finds that in the existing optimization guidance system of the cold-end equipment of the thermal generator set, the cold-end comprehensive consumption difference is obtained according to the simulation calculation model, and the optimal circulating water flow is determined, or the optimal circulating water flow is obtained by establishing a turbine exhaust steam, circulating water flow and condenser characteristic theoretical calculation model.
However, the invention aims at the cold end optimization of a single machine, and optimization research of coupling of two machines is not found, but most of the inventions run in a mode of coupling of two machines in practice, so that the deviation of the actual optimization effect is large.
Disclosure of Invention
In view of this, the invention provides a method, an apparatus, a device and a storage medium for determining a cold end pump running mode of a power plant, and aims at a cold end system with two coupled machines.
In a first aspect, the invention provides a method for determining an operation mode of a cold-end circulating pump of a power plant, which comprises the following steps:
acquiring cold end operation data of the two coupled units;
constructing a net power model of the power plant based on the cold end operational data;
and obtaining optimization requirements, and determining the running mode of the cold end circulating pump based on the optimization requirements and the net power model.
In a second aspect, the present invention provides a device for determining an operation mode of a cold-end circulating pump of a power plant, including:
the data acquisition module is used for acquiring cold end operation data of the two coupled units;
a model determination module for constructing a net power model of the power plant based on the cold end operational data;
and the operation mode determining module is used for acquiring optimization requirements and determining the operation mode of the cold-end circulating pump based on the optimization requirements and the net power model.
In a third aspect, the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program executable by the processor, and the processor executes the computer program to implement the method for determining the cold-end pumping operation mode of the power plant.
In a fourth aspect, the present invention provides a computer-readable storage medium, which stores a computer program, the computer program comprising program instructions, which when executed, implement the aforementioned power plant cold end tracking pump operation mode determination method.
Compared with the prior art, the method for determining the cold end circulating pump operation mode of the power plant, provided by the invention, is characterized in that a net power model of the power plant is established based on cold end operation data, and finally, the cold end circulating pump operation mode is determined based on the net power model according to actual optimization requirements, wherein the cold end circulating pump operation mode takes the characteristics of two coupled units into consideration, and the adaptability to the optimization requirements is better.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a two-machine coupled cold-end system of a typical large-scale thermal power plant provided by the present invention;
fig. 2 is a flowchart of a method for determining an operation mode of a cold-end circulating pump of a power plant according to an embodiment of the present invention;
FIG. 3 is a flow chart of a net power model determination process provided by one embodiment of the present invention;
FIG. 4 is a sub-flowchart of a method for determining a cold-end pump operation mode of a power plant according to a second embodiment of the present invention;
FIG. 5 is a sub-flowchart of a method for determining a cold-end circulation pump operation mode of a power plant according to a second embodiment of the present invention;
FIG. 6 is a sub-flowchart of a method for determining a cold-end circulation pump operation mode of a power plant according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a device for determining an operation mode of a cold-end circulating pump of a power plant according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of a device for determining an operation mode of a cold-end circulating pump of a power plant according to a fourth embodiment of the present invention.
Detailed Description
The technical solution in the implementation of the present application is described clearly and completely below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of some, and not restrictive, of the current application. It should be further noted that, based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the terms "first," "second," and the like may be used herein to describe various orientations, actions, steps, elements, or the like, but the orientations, actions, steps, or elements are not limited by these terms. These terms are only used to distinguish one direction, action, step or element from another direction, action, step or element. For example, the first example may be referred to as a second use case, and similarly, the second example may be referred to as the first use case, without departing from the scope of the present invention. Both the first and second use cases are use cases, but they are not the same use case. The terms "first", "second", etc. are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include a combination of one or more features. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. It should be noted that when one portion is referred to as being "secured to" another portion, it may be directly on the other portion or there may be an intervening portion. When a portion is said to be "connected" to another portion, it may be directly connected to the other portion or intervening portions may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the steps as a sequential process, many of the steps can be performed in parallel, concurrently or simultaneously. In addition, the order of the steps may be rearranged. A process may be terminated when its operations are completed, but may have additional steps not included in the figure. A process may correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.
Referring to fig. 1, a method for determining a cold end circulating pump operation mode of a power plant according to an embodiment of the present invention is implemented based on a two-machine coupling cold end system of a typical large thermal power plant shown in fig. 1. As shown in fig. 1, the system is formed by coupling two cold sides, each cold side including the same devices: the system comprises a water cooling tower 10, a condenser 20, a circulating water pump 30 and a communication door 40, wherein the condenser 20 is connected with a low-pressure cylinder 50 of the generator set and used for exhausting and condensing the low-pressure cylinder.
Example one
Referring to fig. 1, the present embodiment provides a method for determining a cold end pump running mode of a power plant, which may be applied to a cold end management system of the power plant, and specifically may be executed by a terminal or a server, or may be completed by interaction between the terminal and the server, where the method includes the following steps:
and S110, acquiring cold end operation data of the two coupled units.
In this embodiment, the two units of the power plant operate in a coupled manner, and the cold end operation modes of the two coupled units are completely different from the cold end operation mode of the single unit, so that the optimization mode needs to be determined again.
In this embodiment, cold-end operating data can be obtained through the experiment to the cold-end, also can be the operation record of power plant and obtain.
Specifically, the cold end operation data comprises a first relation, a second relation and a third relation, the first relation represents the influence of circulating water temperature and unit power on back pressure, the second relation represents the relation between the back pressure and the unit power, and the third relation represents the relation between circulating pump power consumption and circulating water flow. Of course, the cold end operation data is only an example and is not limited, the actual cold end operation data is more complex, and this is only a brief example, for example, the cold end operation data includes a condenser all-condition characteristic curve, a back pressure versus power correction curve, and a relation between the circulating pump power consumption and the circulating water flow rate in different circulating pump operation modes, the first relation may be determined according to the condenser all-condition characteristic curve, the second relation may be determined according to the back pressure versus power correction curve, and the third relation may be determined according to the relation between the circulating pump power consumption and the circulating water flow rate in different circulating pump operation modes.
For a terminal capable of implementing the method, cold-end operating data can be imported through a data interface or acquired by means of an input device.
And S120, constructing a net power model of the power plant based on the cold end operation data.
In this embodiment, the net power of the power plant is obtained by subtracting the sum of the power consumption of the pump from the sum of the output of the two coupled units, that is, subtracting the power consumption of the pump from the load of the unit. The net power model determination of the power plant comprises the steps S121-122 as shown in fig. 2:
and S121, determining the sum of the unit output when the current back pressure of the two units is corrected to the rated back pressure and the sum of the current pump-following power consumption based on the cold end operation data.
And S122, subtracting the sum of the unit output power and the pump-following power consumption as net power, and determining a relation model of the net power, the unit load, the circulating water temperature and the circulating water flow as a net power model.
The expression of the net power model is:
in the above formula, P represents the net power of the power plant, i.e. the sum of the net powers of the two coupled units, in kW; e1Represents the current output (load) of one of the two coupled units (called the first unit) in kW; e2Represents the current output (load) of the other unit (called the second unit) of the two coupled units, and the unit is kW; pgain_1The output increment of the first unit corrected to the rated exhaust pressure (backpressure) is expressed in kW; pgain_2The output increment of the second unit under the condition of correcting to rated exhaust pressure (backpressure) is shown, and the unit is kW;
represents the power consumption of a first circulating pump (which can comprise a plurality of water pumps) matched with a first unit, and the unit is kW; pcost_2Representing the power consumption in kW of a second circulating pump (which may comprise a plurality of water pumps) associated with a second unit. It should be noted that in some embodiments, to simplify processing, the loads of the two units may be considered to be the same.
The above formula is a net power model of two coupled units, specifically, the current output E of the unit1And E2Is directly accessible; pgain_1And Pgain_2The output increment of the first unit under the condition of correcting to rated exhaust pressure (backpressure) and the output increment of the second unit under the condition of correcting to rated exhaust pressure (backpressure) are determined according to a second relation (the second relation represents the change relation of the unit power before and after the backpressure of the cold end is corrected, the current backpressure of the unit can be determined according to the first relation by the circulating water temperature and the unit power, the circulating water temperature and the unit power are determined, the rated backpressure is generally 4.9kPa, and the load adjustment quantity of the unit can also be represented by the circulating water flow when the current backpressure is corrected to the rated backpressure by calculation according to the second relation);
and Pcost_2According to cold end operation data, the third relation represents the relation between the circulating water flow and the circulating pump power consumption, namely the circulating pump power consumption can be calculated from the circulating water flow according to the third relation, and therefore net power in a finally obtained net power model can be represented by unit load, circulating water temperature and circulating water flow.
That is, through cold end operating data, the main parameters of the net power model can be determined as unit load, circulating water temperature and circulating water flow: p ═ f (E, T, Q), where E represents the unit load in kW, T represents the circulating water temperature in deg.c, and Q represents the circulating water flow rate.
S130, obtaining optimization requirements, and determining a cold end circulating pump operation mode based on the optimization requirements and the net power model.
According to the net power model determined in step S120, the relationship between net power and unit load, circulating water temperature and circulating water flow rate may be determined, in this embodiment, the optimization requirement is the maximum net power, the unit load is controlled by an upstream, and the circulating water temperature is influenced by the environment, so that when the maximum net power is considered, only the influence of the circulating water flow rate on the net power needs to be considered to find the optimal circulating water flow rate, and further, the circulating pump operation mode for realizing the optimal circulating water flow rate is determined.
Optionally, in an embodiment, the optimization requirement may be that the energy utilization rate is highest (only the tracking power consumption is considered as loss), that is, the ratio of the net power to the tracking power consumption is largest, and since the tracking power consumption may be calculated from the circulating water flow, the ratio of the net power to the tracking power consumption may be obtained by conversion based on a net power model, and further, the optimal circulating water flow when the energy utilization rate is highest is determined, and further, the tracking operation mode for achieving the optimal circulating water flow is determined.
Optionally, in an embodiment, the optimization requirement may be that the economic benefit is the highest, at this time, a coal-fired price and an internet electricity price need to be introduced, a product of the net power and the internet electricity price is a sale fee, a product of the coal-fired price and the coal consumption is a cost, and a difference between the two is a net profit, so as to realize the optimal circulating water flow with the highest economic benefit, and further determine a pump-following operation mode for realizing the optimal circulating water flow.
The embodiment provides a method for determining a cold end circulating pump operation mode of a power plant, which includes the steps of firstly obtaining cold end operation data of two coupled units, constructing a net power model of the power plant based on the cold end operation data, and finally determining the cold end circulating pump operation mode based on the net power model according to actual optimization requirements, wherein the cold end circulating pump operation mode takes the characteristics of the two coupled units into consideration, and the cold end circulating pump operation mode is better in adaptability to the optimization requirements.
Example two
The second embodiment provides a method for determining an operation mode of a cold-end circulating pump of a power plant, which can be implemented on the basis of the first embodiment, and specifically explains or exemplifies part of contents in the first embodiment, and specifically includes:
as shown in fig. 4, the obtaining manner of the first relationship includes steps S211 to 212:
s211, acquiring back pressure data of at least three condenser inlet circulating water temperatures, at least three unit powers and at least three circulating water flow rates.
S212, fitting based on the backpressure data to obtain a condenser all-condition characteristic curve, and determining the first relation according to the condenser all-condition characteristic curve.
Specifically, a characteristic test of the two-condenser is carried out according to the first relation, and the full-working-condition characteristic of the two-condenser is obtained. Taking a 600MW unit as an example, a condenser characteristic test is performed under at least nine working conditions of (300MW, circulating water temperature 8-10 ℃), (300MW, circulating water temperature 18-20 ℃), (300MW, circulating water temperature 30-32 ℃), (450MW, circulating water temperature 8-10 ℃), (450MW, circulating water temperature 18-20 ℃), (450MW, circulating water temperature 30-32 ℃), (600MW, circulating water temperature 8-10 ℃), (600MW, circulating water temperature 18-20 ℃), (600MW, circulating water temperature 30-32 ℃), and data acquisition to obtain backpressure data, wherein the circulating water flow is changed for at least three times in each working condition, the circulating water flow span is as large as possible, and each circulating water flow is stable for 30 minutes.
According to the backpressure data, a condenser full-operating-condition characteristic curve is obtained through fitting, the condenser full-operating-condition characteristic curve can determine that the circulating water temperature at the inlet of the condenser is 5-35 ℃, the unit power is within the range of 300MW-600MW, the circulating water temperature at the inlet of any condenser and the condenser vacuum (backpressure) under the unit power, the influence of the circulating water temperature and the unit power on the backpressure can be determined according to the condenser full-operating-condition characteristic curve, and a first relation is obtained.
As shown in fig. 5, the obtaining manner of the second relationship specifically includes steps S221 to 222:
and S221, obtaining typical back pressure-to-power correction curves based on different running modes of the at least three units under power.
S222, fitting the typical back pressure to power correction curve to obtain a full-working-condition back pressure to power correction curve, and determining the second relation based on the full-working-condition back pressure to power correction curve.
At least three sets of power in step S221 are typical sets of power selected empirically, the boiler fuel is kept unchanged at different sets of power, the condenser vacuum is changed by adjusting the running mode of the circulating pump, the sets of power at different back pressures are measured, a back pressure versus power correction curve under typical conditions is obtained, a back pressure versus power correction curve under all conditions is obtained by fitting, and how to calculate the set of power after back pressure adjustment, i.e., a second relationship, can be determined according to the back pressure versus power correction curve under all conditions.
Specifically, the obtaining manner of the third relationship includes: respectively measuring the circulating pump power consumption and the circulating water flow of the condenser in different circulating pump combination modes when the circulating water communication doors of the two machines are opened and closed to serve as circulating pump power consumption data; determining the third relationship based on the pump-tracking power consumption data. As can be seen from fig. 1, since the cold ends of the two machines are coupled, the circulation of the circulating water is more complicated, and the contact door will affect the power consumption of the circulating pump and the circulating water flow rate of the condenser when being opened and closed, in this embodiment, the power consumption of the circulating pump and the circulating cooling water flow rate of the condenser are measured in all the circulating pump operation modes, and finally, the corresponding power consumption of the circulating pump and the corresponding cooling water flow rate can be determined according to the circulating pump operation modes, and the corresponding circulating pump operation modes can also be reversely deduced according to the cooling water flow rate.
More specifically, since the tracking pump operation mode generally does not achieve all the cooling water flow, that is, the tracking pump operation mode that accurately achieves the actual optimal flow cannot be found after the actual optimal flow is determined, the embodiment provides a circulating water flow matrix for determining the tracking pump operation mode that is closest to the actual optimal flow, that is, step S130 is shown in fig. 6, and specifically includes steps S231 to 233:
and S231, when the optimization requirement is that the net power is maximum, determining the optimal circulating water flow of the cold end when the net power is maximum according to the net power model.
And S232, determining the actual optimal flow of the unit according to the optimal circulating water flow from a preset circulating water flow matrix.
Specifically, the temperature range of circulating water is set to be 5-35 ℃, and the step length is 1 ℃; the power range of the unit is 50-100% THA, and the step length is 10 MW; and calculating the achievable optimal circulating water flow under the temperature of any condenser inlet circulating water and the unit power to form an optimal circulating water flow matrix, wherein each achievable optimal circulating water flow in the optimal circulating water flow matrix corresponds to a determined circulating pump operation mode. And determining the actual optimal flow according to the optimal circulating water flow, namely selecting the achievable optimal circulating water flow which is closest to the optimal circulating water flow as the actual optimal flow.
And S233, determining a corresponding cold end circulating pump operation mode according to the actual optimal flow.
The actual optimum flow rate is actually the optimum circulating water flow rate that can be achieved, corresponding to a specific circulating pump operation mode, so that the required circulating pump operation mode can be obtained. Specifically, the water pump of cold junction generally includes double speed pump and inverter pump, and the circulation pump operation mode is realized through adjusting double speed pump, inverter pump and contact door.
The method for determining the running mode of the cold end circulating pump of the power plant provided by the embodiment further provides a specific acquisition method of cold end running data and a process for specifically determining the running mode of the circulating pump according to the circulating water flow matrix, wherein the cold end running data is obtained based on two coupled units, different working conditions are covered, the obtained net power has better adaptability to the coupled generator sets, errors are reduced, the running mode of the circulating pump which can be actually realized can be quickly and accurately found through the circulating water flow matrix, and the efficiency and the accuracy are improved.
EXAMPLE III
Fig. 7 is a schematic structural diagram of a device 300 for determining an operation mode of a cold-end circulating pump of a power plant according to a third embodiment of the present invention, and as shown in fig. 7, the device 300 includes:
and a data acquisition module 310, configured to acquire cold-end operating data of the two coupled units.
A model determination module 320 to construct a net power model of the power plant based on the cold end operational data.
And an operation mode determining module 330, configured to obtain an optimization requirement, and determine a cold-end tracking pump operation mode based on the optimization requirement and the net power model.
More specifically, in one embodiment, the cold end operational data includes a first relationship representing an effect of circulating water temperature and unit power on back pressure, a second relationship representing a relationship of back pressure and unit power, and a third relationship representing a relationship of circulating pump power consumption and circulating water flow.
More specifically, in an embodiment, the data obtaining module 310 is specifically configured to: acquiring the temperatures of circulating water at the inlets of at least three condensers, the powers of at least three units and back pressure data under the condition of at least three circulating water flows; and fitting based on the backpressure data to obtain a condenser all-condition characteristic curve, and determining the first relation according to the condenser all-condition characteristic curve.
More specifically, in one embodiment, the data obtaining module 310 is further configured to: obtaining typical back pressure versus power correction curves of different running modes of the circulating pump based on at least three unit powers; and fitting the typical back pressure to power correction curve to obtain a full-working-condition back pressure to power correction curve, and determining the second relation based on the full-working-condition back pressure to power correction curve.
More specifically, in one embodiment, the data obtaining module 310 is further configured to: respectively measuring the circulating pump power consumption and the circulating water flow of the condenser in different circulating pump combination modes when the circulating water communication doors of the two machines are opened and closed to serve as circulating pump power consumption data; determining the third relationship based on the pump-tracking power consumption data.
More specifically, in an embodiment, the model determining module 320 is specifically configured to: determining the sum of the unit output when the current back pressure of the two units is corrected to the rated back pressure and the sum of the current pump-following power consumption based on the cold end operation data; and subtracting the sum of the output power of the unit and the power consumption sum of the circulating pump to be used as net power, and determining a relation model of the net power, the unit load, the circulating water temperature and the circulating water flow to be used as a net power model.
More specifically, in an embodiment, the operation mode determining module 330 includes an optimal circulating water flow determining unit, an actual optimal flow determining unit, and a pump-following operation mode determining unit:
and the optimal circulating water flow determining unit is used for determining the optimal circulating water flow of the cold end when the net power is maximum according to the net power model when the optimization requirement is that the net power is maximum.
And the actual optimal flow determining unit is used for determining the actual optimal flow of the unit from a preset circulating water flow matrix according to the optimal circulating water flow.
And the circulating pump operation mode determining unit is used for determining the corresponding cold end circulating pump operation mode according to the actual optimal flow.
This embodiment provides a power plant's cold end circulation pump operational mode determining means, constructs the net power model of power plant based on cold end operational data, confirms cold end circulation pump operational mode based on net power model according to the optimization demand of reality at last, and the characteristic of two units of coupling is considered to its cold end circulation pump operational mode, and is better to the adaptability of optimizing the demand.
Example four
Fig. 8 is a schematic structural diagram of a device 400 for determining an operation mode of a cold-end circulating pump of a power plant according to a fourth embodiment of the present invention, as shown in fig. 8, the device includes a memory 410 and processors 420, the number of the processors 420 in the device may be one or more, and one processor 420 is taken as an example in fig. 8; the memory 410 and the processor 420 in the device may be connected by a bus or other means, and fig. 8 illustrates the connection by a bus as an example.
The memory 410 is a computer readable storage medium, and may be used to store software programs, computer executable programs, and modules, such as program instructions/modules corresponding to the power plant cold end pumping operation manner determining method in the embodiment of the present invention (for example, the data obtaining module 30, the model determining module 320, and the operation manner determining module 330 in the power plant cold end pumping operation manner determining device). The processor 420 executes various functional applications and data processing of the power plant cold-end tracking operation mode determining device by operating software programs, instructions and modules stored in the memory 410, so as to implement the above-mentioned power plant cold-end tracking operation mode determining method.
Wherein the processor 420 is configured to run the computer executable program stored in the memory 410 to implement the following steps: step S110, obtaining cold end operation data of the two coupled units; step S120, constructing a net power model of the power plant based on the cold end operation data; and S130, acquiring optimization requirements, and determining a cold end circulating pump operation mode based on the optimization requirements and the net power model.
Of course, the device for determining the operation mode of the cold-end circulating pump of the power plant provided by the embodiment of the present invention is not limited to the method operations described above, and may also perform related operations in the method for determining the operation mode of the cold-end circulating pump of the power plant provided by any embodiment of the present invention.
The memory 410 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 410 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 410 may further include memory located remotely from processor 420, which may be connected to devices through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
This embodiment provides a power plant's cold end circulation pump operational mode decision maker, constructs the net power model of power plant based on cold end operational data, confirms cold end circulation pump operational mode based on net power model according to the optimization demand of reality at last, and the characteristic of two units of coupling is considered to its cold end circulation pump operational mode, and is better to the adaptability of optimizing the demand.
EXAMPLE five
An embodiment of the present invention further provides a storage medium containing a computer-executable instruction, where the computer-executable instruction is executed by a computer processor to perform a method for determining a cold-end pumping operation mode of a power plant, and the method for determining a cold-end pumping operation mode of a power plant includes:
acquiring cold end operation data of the two coupled units;
constructing a net power model of the power plant based on the cold end operational data;
and obtaining optimization requirements, and determining the running mode of the cold end circulating pump based on the optimization requirements and the net power model.
Of course, the storage medium provided by the embodiment of the present invention contains computer executable instructions, and the computer executable instructions are not limited to the operations of the method described above, and may also perform related operations in the method for determining the operation mode of the cold-end circulating pump of the power plant provided by any embodiment of the present invention.
From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly can be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a device, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the authorization apparatus, the included units and modules are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method for determining an operation mode of a cold end circulating pump of a power plant is characterized by comprising the following steps:
acquiring cold end operation data of the two coupled units;
constructing a net power model of the power plant based on the cold end operational data;
and obtaining optimization requirements, and determining the running mode of the cold end circulating pump based on the optimization requirements and the net power model.
2. The power plant cold end tracking pump operation mode determining method according to claim 1, characterized in that the cold end operation data comprises a first relation, a second relation and a third relation, the first relation represents the influence of circulating water temperature and unit power on back pressure, the second relation represents the relation of back pressure and unit power, and the third relation represents the relation of circulating pump power consumption and circulating water flow.
3. The power plant cold end tracking pump operation mode determination method of claim 2, wherein the obtaining of the first relationship comprises:
acquiring the temperatures of circulating water at the inlets of at least three condensers, the powers of at least three units and back pressure data under the condition of at least three circulating water flows;
and fitting based on the backpressure data to obtain a condenser all-condition characteristic curve, and determining the first relation according to the condenser all-condition characteristic curve.
4. The power plant cold end tracking pump operation mode determination method according to claim 2, wherein the second relationship is obtained by:
obtaining typical back pressure versus power correction curves of different running modes of the circulating pump based on at least three unit powers;
and fitting the typical back pressure to power correction curve to obtain a full-working-condition back pressure to power correction curve, and determining the second relation based on the full-working-condition back pressure to power correction curve.
5. The power plant cold end tracking pump operation mode determination method according to claim 2, wherein the third relationship is obtained by:
respectively measuring the circulating pump power consumption and the circulating water flow of the condenser in different circulating pump combination modes when the circulating water communication doors of the two machines are opened and closed to serve as circulating pump power consumption data;
determining the third relationship based on the pump-tracking power consumption data.
6. The power plant cold end tracking pump operation mode determination method of claim 1, wherein the constructing a net power model of a power plant based on the cold end operation data comprises:
determining the sum of the unit output when the current back pressure of the two units is corrected to the rated back pressure and the sum of the current pump-following power consumption based on the cold end operation data;
and subtracting the sum of the output power of the unit and the power consumption sum of the circulating pump to be used as net power, and determining a relation model of the net power, the unit load, the circulating water temperature and the circulating water flow to be used as a net power model.
7. The power plant cold end pumping operation method of claim 1, wherein determining a cold end pumping operation based on the optimization requirements and the net power model comprises:
when the optimization requirement is that the net power is maximum, determining the optimal circulating water flow of the cold end when the net power is maximum according to the net power model;
determining the actual optimal flow of the unit from a preset circulating water flow matrix according to the optimal circulating water flow;
and determining a corresponding cold end circulating pump operation mode according to the actual optimal flow.
8. The utility model provides a device is confirmed to power plant's cold end circulation pump operation mode which characterized in that includes:
the data acquisition module is used for acquiring cold end operation data of the two coupled units;
a model determination module for constructing a net power model of the power plant based on the cold end operational data;
and the operation mode determining module is used for acquiring optimization requirements and determining the operation mode of the cold-end circulating pump based on the optimization requirements and the net power model.
9. Computer arrangement, characterized by comprising a memory and a processor, the memory having stored thereon a computer program being executable on the processor, the processor when executing the computer program implementing the method for determining cold end tracking operation of a power plant as claimed in any one of the claims 1 to 7.
10. A computer-readable storage medium, characterized in that the storage medium stores a computer program comprising program instructions which, when executed, implement the power plant cold end tracking pump operation determination method of any one of claims 1 to 7.
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