CN117474246A - Method and device for determining heat supply delay of heat exchange station - Google Patents
Method and device for determining heat supply delay of heat exchange station Download PDFInfo
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Abstract
The invention relates to a method and a device for determining heating delay of a heat exchange station, comprising the following steps: acquiring a heating pipe network diagram of a target area; abstracting a heat supply pipe network diagram into a pipe network topological relation diagram; constructing a pipe network heat medium flow path of each heat exchange station by utilizing the pipeline nodes, and establishing a heating delay expression of each heat exchange station based on a target sub-path in the pipe network heat medium flow path of each heat exchange station; analyzing the water supply temperatures of two water supply pipeline nodes corresponding to the target sub-expression in all the sub-expressions to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression; and summing the heat supply transmission and distribution delays of all the sub-expressions in the heat supply delay expressions of each heat exchange station based on the heat supply transmission and distribution delays corresponding to each target sub-expression to obtain the heat supply delay of each heat exchange station, so that a heat supply system thermodynamic production plan reference can be provided for heat supply operators, the heat supply accuracy is improved, and the aim of saving energy is achieved.
Description
Technical Field
The invention relates to the field of town heat supply, in particular to a method and a device for determining heat supply delay of a heat exchange station.
Background
With the progress of urban treatment in China, the urban central heating industry in China is greatly developed, the heating area is continuously expanded, the heating system becomes complex and huge, the hysteresis of heat source heat delivery to the heat exchange station at the tail end or heat utilization unit is more and more obvious, and the hysteresis is particularly expressed in the delivery process that the heat source has different delays for heat users with different distances: heat source-heat exchange station delay, heat exchange station-user delay.
And when the heat source is used for conveying the heat medium, the conveying and distributing time from the heat source to the heat exchange station is usually calculated only from the quality adjusting angle according to the design flow and the actual pipe diameter and the heat supply pipe length. In actual operation, factors influencing the heating medium transmission and distribution delay also include along-path pressure loss, pipe network resistance change and the like, so that the running flow and the design flow are different, the heating delay cannot be accurately estimated, and the problems caused by the method are that: when the heat output of the lower heat source is not matched with the heat demand after each heat unit number is small, the energy waste or the poor heat supply effect is caused.
For example, a project has 4 heating lines with a diameter of 1.4 meters and a total length of 70 km, which can provide heat for 7600 square meters in a city, and it takes about 12 hours for heat from a heat source to flow to a city through a transmission and distribution network, which means that heat is output from the heat source at 0 a day and reaches urban areas at 12 a.m., and during this time, the heat used by the system has greatly different due to the change of outdoor temperature. If the pipeline transmission and distribution delay is not considered, the heat supply requirement of 0 point on the current outdoor environment to the heat source can not be obtained until 12 am, and the required heat is not required when the different outdoor environment conditions are 0 point. The heat supply quantity based on 0 point is used for meeting the 12-point low-load heat supply demand, and the phenomenon of 'Zhang guan Li' is generated when obvious heat supply and demand is generated, so that heat supply waste or heat supply quality is not up to standard. However, in fact, the heat entering the city is only the first step of heat transfer, inside the city heating system, the heat transferred from the heat source needs to reach each heat using unit in turn due to the laying environment of the city pipe network, which in turn requires a heating delay of several hours, which undoubtedly increases the risk of misplacement of the heat with the user's needs.
Therefore, under the background of the continuously expanded pipe network length and the large complex pipe network topological relation facing towns, operators are required to make a heat supply plan under large delay through experience on one hand, and guide the heat source to produce in advance; on the other hand, attention needs to be paid to the environmental change of the operation parameters without constantly modifying the current heating delay relationship. However, the method obviously cannot completely rely on manual experience to quickly and accurately grasp the pipe network transmission and distribution time in time, and the pain point is often verified in actual operation: operators often respond to intentional oversupply in order to reduce the influence of mismatch of heat supply and demand caused by delay problems, and obvious heat supply waste is derived.
Therefore, the heating delay is completed by means of a more advanced technology aiming at a large heating system, so that the aims of accurate heating, energy conservation and consumption reduction are achieved in one step.
Disclosure of Invention
First, the technical problem to be solved
In view of the above-mentioned drawbacks and shortcomings of the prior art, the present invention provides a method and apparatus for determining a heating delay of a heat exchange station, which solve the technical problems of energy waste or poor heating effect in the prior art.
(II) technical scheme
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:
in a first aspect, an embodiment of the present invention provides a method for determining a heating delay of a heat exchange station, where the heat exchange station is a heat exchange station in a single heat source heating dendritic pipe network system, and the single heat source heating dendritic pipe network system includes a water supply pipeline; the method comprises the following steps: acquiring a heating pipe network diagram of a target area; abstracting a heat supply pipe network diagram into a pipe network topological relation diagram; wherein the pipe network topology graph comprises pipe nodes and dendritic pipe network lines, and the pipe nodes comprise water supply pipe nodes related to water supply pipes; constructing a pipe network heat medium flow path of each heat exchange station by utilizing the pipeline nodes, and establishing a heating delay expression of each heat exchange station based on a target sub-path in the pipe network heat medium flow path of each heat exchange station; the target sub-path is a sub-path formed by water supply pipeline nodes, the heat supply delay expression is used for expressing the time spent by a heat source for conveying the heat medium to a corresponding heat exchange station, the heat supply delay expression comprises a plurality of sub-expressions, and the sub-expressions are used for expressing the time spent by the heat source for conveying the heat medium between two corresponding water supply pipeline nodes; analyzing the water supply temperatures of two water supply pipeline nodes corresponding to the target sub-expression in all the sub-expressions to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression; wherein the target sub-expression comprises one repeated sub-expression and/or a non-repeated sub-expression of the repeated sub-expressions; and summing the heat supply transmission and distribution delays of all the sub-expressions in the heat supply delay expressions of each heat exchange station based on the heat supply transmission and distribution delays corresponding to each target sub-expression to obtain the heat supply delay of each heat exchange station.
In some possible embodiments, the single heat source heating dendritic pipe network system further comprises a return pipe, the pipe node comprising a first connection point, a second connection point, a third connection point, a fourth connection point, a water supply pipe junction, and a return pipe junction, the water supply pipe node comprising the first connection point, the second connection point, and the water supply pipe junction; the first connecting point is used for representing the connecting point of the water supply pipeline and the heat source, the second connecting point is used for representing the connecting point of the water supply pipeline and the heat exchange station, the third connecting point is used for representing the connecting point of the water return pipeline and the heat source, and the fourth connecting point is used for representing the connecting point of the water return pipeline and the heat exchange station.
In some possible embodiments, analyzing the water supply temperatures of two water supply pipeline nodes corresponding to the target sub-expression in all the sub-expressions to obtain a heat supply transmission and distribution delay corresponding to each target sub-expression includes: collecting water supply temperature data of water supply pipeline nodes in a target time period; cleaning the water supply temperature data to obtain cleaned water supply temperature data; and analyzing the water supply temperature of the two water supply pipeline nodes corresponding to all target sub-expressions in all the sub-expressions based on the cleaned water supply temperature data so as to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression.
In some possible embodiments, the cleaning process includes clearing data missing values, culling unreasonable data, and correcting unreasonable data.
In some possible embodiments, the two water supply pipe nodes corresponding to each sub-expression each include an initial pipe node and a terminal pipe node;
correspondingly, analyzing the water supply temperature of the two water supply pipeline nodes corresponding to all target sub-expressions in all the sub-expressions based on the cleaned water supply temperature data to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression, wherein the heat supply transmission and distribution delay comprises the following steps: determining a reference temperature supply trend image of an initial pipeline node corresponding to the current target sub-expression and a plurality of temperature supply trend images to be compared of a terminal pipeline node based on the cleaned water supply temperature data; the current target sub-expression is any target sub-expression in all target sub-expressions, each temperature-supply trend image to be compared in the reference temperature-supply trend image and the plurality of temperature-supply trend images to be compared is intercepted according to the preset window required time, and the starting time corresponding to the reference temperature-supply trend image and the starting time corresponding to each temperature-supply trend image to be compared are different; comparing the reference temperature supply trend image with each temperature supply trend image to be compared, and taking the temperature supply trend image to be compared which is most similar to the reference temperature supply trend image as a target temperature supply trend image; and taking the time difference between the starting time of the reference temperature supply trend image and the starting time of the target temperature supply trend image as the heat supply transmission and distribution delay corresponding to the current target sub-expression.
In some possible embodiments, comparing the reference temperature trend image with each of the temperature trend images to be compared, and taking the temperature trend image to be compared which is most similar to the reference temperature trend image as the target temperature trend image, includes: and calculating the correlation between the reference temperature supply trend image and each to-be-compared temperature supply trend image by using a Pearson correlation coefficient algorithm, and taking the to-be-compared temperature supply trend image with the highest correlation as a target temperature supply trend image.
In a second aspect, an embodiment of the present invention provides a device for determining a heating delay of a heat exchange station, where the heat exchange station is a heat exchange station in a single heat source heating dendritic pipe network system, and the single heat source heating dendritic pipe network system includes a water supply pipeline; the device comprises: the acquisition module is used for acquiring a heating pipe network diagram of the target area; the pipe network abstraction module is used for abstracting the heat supply pipe network diagram into a pipe network topological relation diagram; wherein the pipe network topology graph comprises pipe nodes and dendritic pipe network lines, and the pipe nodes comprise water supply pipe nodes related to water supply pipes; the construction and establishment module is used for constructing a pipe network heat medium flow path of each heat exchange station by utilizing the pipeline nodes and establishing a heating delay expression of each heat exchange station based on a target sub-path in the pipe network heat medium flow path of each heat exchange station; the target sub-path is a sub-path formed by water supply pipeline nodes, the heat supply delay expression is used for expressing the time spent by a heat source for conveying the heat medium to a corresponding heat exchange station, the heat supply delay expression comprises a plurality of sub-expressions, and the sub-expressions are used for expressing the time spent by the heat source for conveying the heat medium between two corresponding water supply pipeline nodes; the analysis module is used for analyzing the water supply temperatures of the two water supply pipeline nodes corresponding to the target sub-expression in all the sub-expressions so as to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression; wherein the target sub-expression comprises one repeated sub-expression and/or a non-repeated sub-expression of the repeated sub-expressions; and the summation module is used for summing the heat supply transmission and distribution delays of all the sub-expressions in the heat supply delay expressions of each heat exchange station based on the heat supply transmission and distribution delays corresponding to each target sub-expression to obtain the heat supply delay of each heat exchange station.
In a third aspect, embodiments of the present application provide a storage medium having stored thereon a computer program which, when executed by a processor, performs the method of the first aspect or any alternative implementation of the first aspect.
In a fourth aspect, an embodiment of the present application provides an electronic device, including: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor and the memory in communication via the bus when the electronic device is running, the machine-readable instructions when executed by the processor performing the method of the first aspect or any alternative implementation of the first aspect.
In a fifth aspect, the present application provides a computer program product which, when run on a computer, causes the computer to perform the method of the first aspect or any of the possible implementations of the first aspect.
(III) beneficial effects
The beneficial effects of this application are:
the utility model provides a method and device for confirming heat supply delay of heat exchange station, through obtaining the heat supply pipe network diagram of target area, and abstract the heat supply pipe network diagram into pipe network topological relation diagram, and utilize pipeline node to construct the pipe network heat medium flow path of each heat exchange station, and based on the target sub-path in the pipe network heat medium flow path of each heat exchange station, establish the heat supply delay expression of each heat exchange station, and the water supply temperature of two water supply pipeline nodes that target sub-expression corresponds in all sub-expressions carries out the analysis, so as to obtain the heat supply and allocate delay that each target sub-expression corresponds, finally carry out the summation with the heat supply and allocate delay of all sub-expressions in the heat supply delay expression of each heat exchange station, obtain the heat supply delay of each heat exchange station, thereby can provide the heating system thermal production plan reference to the heat supply operating personnel, and then improve the heat supply accuracy, reach energy-conserving purpose.
In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a flow chart of a method for determining a heating delay of a heat exchange station according to an embodiment of the present application;
fig. 2 shows a schematic diagram of a heating pipe network diagram according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a pipe network topology graph according to an embodiment of the present disclosure;
fig. 4A is a schematic diagram of a pipe network heat medium flow path of a heat exchange station a according to an embodiment of the present application;
fig. 4B is a schematic diagram of a pipe network heat medium flow path of a heat exchange station B according to an embodiment of the present disclosure;
Fig. 4C is a schematic diagram of a pipe network heat medium flow path of a heat exchange station C according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram showing a comparison of water supply temperature profiles of an initial pipe node and a terminal pipe node according to an embodiment of the present application;
FIG. 6 shows a schematic diagram of water supply temperature curves of a pipeline node P1 and a pipeline node P2 in a day according to an embodiment of the present application;
fig. 7 shows a block diagram of an apparatus for determining a heating delay of a heat exchange station according to an embodiment of the present application.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
In order to solve the problems of energy waste or poor heat supply effect in the prior art, the embodiment of the application provides a scheme for determining the heat supply delay of a heat exchange station, and the scheme is characterized in that under the condition of using a single heat source, the influence of water supply temperature difference on a pipe network when the heat source provides different heat supply amounts is utilized, and the heat supply delay (or the heat supply temperature change time difference) of each node at the downstream caused by the heat supply temperature change of the heat source is found through data analysis, so that the heat supply delay of each node relative to the heat source is obtained. However, compared with a heating system in a large heating system, if the heat source operation parameters are changeable, the change rule of each node relative to the heat source cannot be clearly found, and based on the consideration of improving accuracy, the application adopts the ductility of a heating pipe network according to the characteristics of a single heat source branch pipe network, describes the heat transfer track for each heat utilization unit by using pipeline nodes, calculates the delay time from the heat source to the nearby node and the delay time from the node to the node layer by the change rule of the heat source and the temperature supply parameters between the node and the node, and adds up the delay time to obtain the heating delay data of each heat exchange station relative to the heat source, thereby providing the heating operation personnel with the reference of the heating system thermal production plan, further improving the heating accuracy and achieving the purpose of energy conservation.
In order that the above-described aspects may be better understood, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1, fig. 1 shows a flowchart of a method for determining a heating delay of a heat exchange station according to an embodiment of the present application. As shown in fig. 1, the method may be performed by an apparatus for determining a heating delay of a heat exchange station, and a specific apparatus of the apparatus may be set according to actual needs, and embodiments of the present application are not limited thereto. For example, the device may be a computer, a server, or the like. Specifically, the heat exchange station is a heat exchange station in a single-heat-source heat-supply dendritic pipe network system, and the single-heat-source heat-supply dendritic pipe network system comprises a water supply pipeline and a water return pipeline; the method comprises the following steps:
step S110, a heating pipe network diagram of a target area is obtained.
It should be understood that the specific area of the target area may be set according to actual requirements, and embodiments of the present application are not limited thereto.
It should also be understood that the specific form of the heat supply network map may be set according to actual requirements, and the embodiments of the present application are not limited thereto.
For example, the form of the heat supply network graph can be an electronic version graph paper or a paper graph paper.
In order to facilitate understanding of step S110, description will be made below by way of specific embodiments.
Specifically, the heat supply pipe network diagram of the target area can be arranged to comb out the trend of the pipe network and the relative position between the heat utilization units.
For example, the heat supply pipe network diagram shown in fig. 2 is arranged to clearly distinguish the relative positions of the three heat exchange stations, namely, the heat exchange station A, the heat exchange station B and the heat exchange station C. Also, the solid line pipe in fig. 2 is a water supply pipe, and the dotted line pipe in fig. 2 is a return pipe.
The hardware, communication and system operation environment of the single heat source heat supply dendritic pipe network system is as follows: each node of the pipe network has the functions of temperature measurement, acquisition and data uploading; the whole heating system is provided with a heat source, a pipe network and a heat exchange station (or called a heat utilization unit); the pipe network drawing is consistent with the actual laying condition; the pipeline is completely insulated, the pipeline is not damaged, and no obvious pipe network transmission and distribution heat loss exists. And whether the heat source or the heat exchange station has the functions of heat data acquisition and storage, and the operation data can be uploaded to a centralized control system or a cloud end in time.
Step S120, abstracting the heat supply network map into a network topology relationship map. The pipe network topological relation diagram comprises pipe nodes and dendritic pipe network lines, wherein the dendritic pipe network lines are used for connecting the pipe nodes into a network structure, and the pipe nodes comprise water supply pipe nodes related to water supply pipes.
The pipeline node comprises a first connecting point, a second connecting point, a third connecting point, a fourth connecting point, a water supply pipeline intersection point and a return water pipeline intersection point, and the water supply pipeline node comprises the first connecting point, the second connecting point and the water supply pipeline intersection point; the first connecting point is used for representing the connecting point of the water supply pipeline and the heat source, the second connecting point is used for representing the connecting point of the water supply pipeline and the heat exchange station, the third connecting point is used for representing the connecting point of the water return pipeline and the heat source, and the fourth connecting point is used for representing the connecting point of the water return pipeline and the heat exchange station.
In order to facilitate understanding of step S120, description will be made below by way of specific embodiments.
Specifically, the pipe network is abstracted into a pipe network topological relation diagram through the heat supply pipe network diagram. And the relative position of the heat exchange station and the number of the pipe network junction (or pipeline junction) can be drawn through the pipe network topological relation diagram, and the flow path description from the heat medium of the heat source to each heat unit is completed through the marking of each pipeline node.
For example, as shown in the pipe network topology diagram of fig. 3, the pipe nodes include P1 (where P1 is a junction point of a water supply pipe and a heat source), P2 (where P2 is a junction point of a water supply pipe), P3 (where P3 is a junction point of a water supply pipe), P4 (where P4 is a junction point of a water supply pipe and a heat exchange station a), P5 (where P5 is a junction point of a water supply pipe and a heat exchange station B), P6 (where P6 is a junction point of a water supply pipe and a heat exchange station C), P1 '(where P1' is a junction point of a water return pipe and a heat source), P2 '(where P2' is a junction point of a water return pipe, P3 'is a junction point of a water return pipe, P4' is a junction point of a water return pipe and a heat exchange station a), P5 '(where P5' is a junction point of a water return pipe and a heat exchange station B), and P6 'where P6' is a junction point of a water return pipe and a heat exchange station C.
Wherein, this heating system has water supply pipeline node: p1, P2, P3, P4, P5, P6; return pipe node: p1', P2', P3', P4', P5', P6'.
And step S130, constructing a pipe network heat medium flow path of each heat exchange station by utilizing the pipeline nodes, and building a heating delay expression of each heat exchange station based on a target sub-path in the pipe network heat medium flow path of each heat exchange station. Wherein the target sub-path is a sub-path formed by water supply pipeline nodes; the heating delay expression is used to represent the time taken by the heat source to deliver the heat medium to the corresponding heat exchange station through the necessary path of the heat medium, and the necessary path refers to the shortest transmission path between two water supply pipe nodes; the heating delay expression includes a plurality of sub-expressions, and the sub-expressions are used to represent the time required for transporting the heating medium between its corresponding two water supply pipe nodes.
It should be understood that, the specific process of constructing the pipe network heat medium flow path of each heat exchange station by using the pipe node and establishing the heating delay expression of each heat exchange station based on the target sub-path in the pipe network heat medium flow path of each heat exchange station may be set according to actual requirements, and the embodiment of the application is not limited thereto.
In particular, the pipe network heat medium flow paths of the heat exchange stations can be described by pipe nodes respectively. And the time delay of heat supply can be defined to be the arrival time of the heat source for delivering the heat medium with different parameters to each heat exchange station, and the heat supply time delay expression of each heat exchange station is determined through the carding and analysis, wherein the time delay of each station is the sum of the time spent by the heat source heat medium flowing through the necessary path.
For example, as shown in fig. 4A to 4C, the pipe network heat medium flow path of each heat exchange station can be obtained by analysis:
heat exchange station a: p1- > P2- > P3- > P4' - > P3- > P2' - > P1';
heat exchange station B: p1- > P2- > P3- > P5'- > P3' - > P2'- > P1';
heat exchange station C: p1- > P2- > P6' - > P2' - > P1'.
And, the heat supply delay expression of each heat exchange station specifically includes:
heat supply delay T of heat exchange station A a ＝T 1-2 +T 2-3 +T 3-4 ；
Heat supply delay T of heat exchange station B b ＝T 1-2 +T 2-3 +T 3-5
Heat supply delay T of heat exchange station C c ＝T 1-2 +T 2-6 。
Wherein T is 1-2 Refers to the time required for the transportation and distribution of the water supply pipeline node P1 to the water supply pipeline node P2;
T 2-3 refers to the time required for the transportation and distribution from the water supply pipeline node P2 to the water supply pipeline node P3;
T 3-4 refers to the time required for the transportation and distribution from the water supply pipeline node P3 to the water supply pipeline node P4;
T 3-5 refers to the time required for the transportation and distribution from the water supply pipeline node P3 to the water supply pipeline node P5;
T 2-6 refers to the time required for the water supply pipe node P2 to the water supply pipe node P6 to be delivered.
It should be noted here that for T a For T 1-2 、T 2-3 And T 3-4 Are both sub-expressions. Correspondingly, other heating delay expressions are similar and will not be described here.
And step S140, analyzing the water supply temperatures of the water supply pipeline nodes of the two pipe network corresponding to the target sub-expression in all the pipe network sub-expressions to obtain the heat supply transmission and distribution delay corresponding to each pipe network target sub-expression.
It should be understood that the target sub-expression includes one repeated sub-expression and/or a non-repeated sub-expression of the repeated sub-expressions. And, the number of repeated sub-expressions is counted.
For example, when all the sub-expressions include 1 first sub-expression, 3 second sub-expressions, and 4 third sub-expressions, the target sub-expression is 1 first sub-expression, 1 second sub-expression, and 1 third sub-expression, so that each of the different types of sub-expressions needs to be processed only once without repeated processing, thereby enabling resource saving.
It should be understood that, the specific process of analyzing the water supply temperatures of the two pipe network water supply pipeline nodes corresponding to the target sub-expression in all the pipe network sub-expressions to obtain the heat supply transmission and distribution delay corresponding to each pipe network target sub-expression may be set according to actual requirements, and the application embodiment is not limited thereto.
Optionally, collecting water supply temperature data of the water supply pipeline node in a target time period; cleaning the water supply temperature data to obtain cleaned water supply temperature data; and analyzing the water supply temperature of the two water supply pipeline nodes corresponding to all target sub-expressions in all the sub-expressions based on the cleaned water supply temperature data so as to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression.
It should be understood that the specific time period of the target time period and the specific cleaning means included in the cleaning process may be set according to actual requirements, and the embodiment of the present application is not limited thereto.
Optionally, the cleaning process includes clearing data missing values, culling unreasonable data, and correcting unreasonable data.
For example, the water supply temperature operating data in the target time period can be collected through hardware modification and existing heat exchange station data, and the water supply temperature operating data is reasonably cleaned to screen trusted, usable and comparable operating data. Wherein the cleaning process comprises: cleaning data missing values, unifying data formats, removing data repetition values, correcting data unreasonable values, eliminating non-target data segments, and performing relevance verification between data of different sources according to expert knowledge.
For a purge data miss value, it includes: and determining a data missing range, removing non-target data segments in the missing range, and filling data missing values of the target data segments in the missing range according to business knowledge.
And because different positions of the system can come from different equipment manufacturers, the data frequency of the system is different, the data needs to be aligned, and each parameter has data in each data acquisition period through data smoothing processing, so that the system can be used for data analysis.
And, for correction data irrational values, it includes: and taking the historical operation data which exceeds the preset data distribution range as the data unreasonable value. Specifically, the temperature of the heat source water supply is greatly exceeded, the temperature is greatly lower than the outdoor environment temperature, the temperature is higher than the outdoor temperature and the like, and the unreasonable value of the data is corrected according to the business knowledge, so as to be removed or corrected.
It should also be understood that, based on the water supply temperature data after cleaning, the water supply temperatures of the two water supply pipeline nodes corresponding to all the target sub-expressions in all the sub-expressions are analyzed, so that the specific process of obtaining the heat supply transmission and distribution delay corresponding to each target sub-expression can also be set according to actual requirements, and the embodiment of the application is not limited thereto.
Optionally, determining a reference temperature supply trend image of the initial pipeline node corresponding to the current target sub-expression and a plurality of temperature supply trend images to be compared of the terminal pipeline node based on the cleaned water supply temperature data; the current target sub-expression is any target sub-expression in all target sub-expressions, each temperature-supply trend image to be compared in the reference temperature-supply trend image and the plurality of temperature-supply trend images to be compared is intercepted according to the preset window required time, and the starting time corresponding to the reference temperature-supply trend image and the starting time corresponding to each temperature-supply trend image to be compared are different; comparing the reference temperature supply trend image with each temperature supply trend image to be compared, and taking the temperature supply trend image to be compared which is most similar to the reference temperature supply trend image as a target temperature supply trend image; and taking the time difference between the starting time of the reference temperature supply trend image and the starting time of the target temperature supply trend image as the heat supply transmission and distribution delay corresponding to the current target sub-expression.
It should be noted that, the pipeline water supply is sequential, so that the temperature supply trend image of the initial end (i.e. the initial pipeline node) can be selected as the reference image, and the final end (i.e. the final pipeline node) must be compared (or compared) with the temperature supply trend image to be compared of the initial end, so as to find out the trend similar.
It should also be understood that the method for determining the target temperature trend image may also be set according to actual requirements, and the embodiment of the application is not limited thereto.
Optionally, a pearson correlation coefficient algorithm is used to calculate the correlation between the reference temperature-supplying trend image and each of the to-be-compared temperature-supplying trend images, and the to-be-compared temperature-supplying trend image with the highest correlation is used as the target temperature-supplying trend image.
In order to facilitate understanding of step S140, description will be made below by way of specific embodiments.
Specifically, as shown in fig. 5, a preset window requirement time Tw may be set, and a complete operation trend image is intercepted by an initial pipeline node corresponding to a current sub-expression as an input signal within the time Tw, and compared with an operation trend image displayed by a corresponding terminal pipeline node within the same time Tw, and a translation time Ts of a graph with higher similarity is obtained by calculating pearson correlation coefficients and comparing with industry universal standards, that is, the time when a heating medium reaches the terminal pipeline node after the initial pipeline node has undergone the time Ts, where the translation time Ts is the transmission and distribution delay from a start point to an end point.
And, the supply water temperature variation of the heat source (pipe node P1) as shown in fig. 5 is compared with the supply water temperature variation trend of the pipe node P2, and the raw data thereof are shown in table 1 below.
TABLE 1
And, in the case of the same Tw (at this time, the Tw is preferably 8 hours), selecting the water supply temperature image of the pipe node P1 in the 8-hour time window (9-17 points), and taking 9 points as the start time of the pipe node P2, intercepting and drawing a change curve every 8 hours for comparison.
And, calculating the correlation by adopting a Pearson correlation coefficient method:
wherein r represents a correlation coefficient and a dimensionless parameter; x represents the water supply temperature of each time point of the pipe node P1, xi represents the i-th hour water supply temperature of the pipe node P1; y represents the water supply temperature of the pipe node P2 at each time point, yi represents the i-th hour water supply temperature of the pipe node P1;representing the average water supply temperature of the pipeline node P1 within 8 hours; />Indicating the average water supply temperature of the pipe node P2 over the selected 8 hours.
And r value is used as a judgment standard according to the industry universal interval, namely: when r is more than 0.8 and less than or equal to 1.0, the positive correlation is represented; when r is less than or equal to-1 and less than or equal to-0.8, the correlation is a negative extremely strong correlation; when r is more than 0.6 and less than or equal to 0.8, the positive correlation is represented; when r is more than 0.8 and less than or equal to 0.6, the negative correlation is expressed; when r is more than 0.4 and less than or equal to 0.6, the correlation is forward medium degree; when r is less than or equal to-0.6 and less than or equal to-0.4, the negative medium degree correlation is indicated; when r is more than 0.2 and less than or equal to 0.4, the positive weak correlation is represented; when r is more than 0.4 and less than or equal to 0.2, the negative correlation is expressed; when r is more than or equal to 0.0 and less than or equal to 0.2, the correlation is very weak or no; when-0.2.ltoreq.r.ltoreq.0, it indicates extremely weak correlation or no correlation.
And, the water supply temperature distribution of the pipe node P2 in the time window of 8 hours after 9 points is shown in table 2 below.
TABLE 2
And, the water supply temperature distribution of the pipe node P1 in the time window of 8 hours after 6 points is shown in table 3 below.
TABLE 3 Table 3
And, by calculating only for different time periods of node 1 and node 2 during the same time window period, the pearson coefficients are derived as shown in table 4 below.
TABLE 4 Table 4
By comparison, the graph of the pipeline node P1 in the Tw time window period is most similar to the graph trend of the pipeline node P2 in the 9-17-point time window period, namely, the heat emitted by the pipeline node P1 in the 6-point reaches the pipeline node P2 after 3 hours, and forms a similar temperature graph trend, as shown in FIG. 6, so that the heat supply transmission and distribution delay T of the obtained heat source (namely, the pipeline node P1) relative to the pipeline node P2 is obtained 1-2 =3 hours.
Similarly, comparing the water supply temperature change of the pipeline node P2 with the water supply temperature change trend of the pipeline nodes P3 and P6 to obtain the heat supply transmission and distribution delay of the heat source relative to the pipeline nodes P3 and P6 to obtain T 2-3 =1 hour, T 2-6 =2 hours. And comparing the water supply temperature change of the pipeline node P3 with the water supply temperature change trend of the pipeline nodes P4 and P5 to obtain the heat supply transmission and distribution delay of the heat source relative to the pipeline nodes P4 and P5, thereby obtaining T 3-4 =2 hours, T 3-5 =4 hours.
And step S150, summing the heat supply transmission and distribution delays of all the sub-expressions in the heat supply delay expressions of each heat exchange station based on the heat supply transmission and distribution delays corresponding to each target sub-expression, so as to obtain the heat supply delay of each heat exchange station.
Specifically, the heat supply delay expression of each heat exchange station is calculated by comparing the delay value of each section (i.e. the heat supply transmission and distribution delay corresponding to each target sub-expression) obtained in step S140, so as to obtain the operation delay data of each station.
For example, the heating delay of each heat exchange station is:
heat supply delay T of heat exchange station A a ＝T 1-2 +T 2-3 +T 3-4 =3+1+2=6 hours;
b heat exchange station heating delay T b ＝T 1-2 +T 2-3 +T 3-5 =3+1+4=8 hours;
c heat exchange station heating delay T c ＝T 1-2 +T 2-6 =3+2=5 hours.
In addition, the time delay of each user can be updated according to the actual operation requirement of the heating time delay graph and the window time and the calculation period so as to guide the operator to adjust the heat source production plan.
For example, because the system is smaller, the change of the circulating water quantity of the heat source is smaller, and the supply relation represented by the delay is verified to be accurate through multiple times of control, the comparison window time Tw of the heating delay graph is formulated to be 8 hours, the calculation period is 1 month, namely, rechecking calculation is carried out after the heating delay is currently determined for 1 month, and the current delay data is corrected.
Therefore, compared with manual experience, the delay calculation mode of the scheme is more accurate and visual;
moreover, the method adopts a dynamic circulation calculation mode, so that the method can be more rapidly adapted to the current heat supply network operation environment;
and besides providing the thermal unit transmission and distribution delay for operators, the extension analysis can be performed by the delay change condition among the communicating nodes at different times. For example: analyzing the possibility of pipe network blockage by analyzing the sudden increase of the time delay between two nodes, analyzing the possibility of pipe network breakage by analyzing the large water temperature difference between the two nodes, and the like;
and, have stronger suitability, the heat consumption unit in this application can be the heat exchange station in a net, also can be the direct-supply heat consumption unit, can also be two net heat users, as long as each heat consumption unit has clear heat source to join in marriage the heat route, can adopt this application to calculate the heat supply delay.
It should be understood that the above method for determining the heating delay of the heat exchange station is only exemplary, and those skilled in the art can make various modifications according to the above method, and modifications or modifications are also within the scope of protection of the present application.
Referring to fig. 7, fig. 7 is a block diagram illustrating a device 700 for determining a heating delay of a heat exchange station according to an embodiment of the present application. It should be understood that the apparatus 700 corresponds to the above method embodiments, and is capable of performing the steps related to the above method embodiments, and specific functions of the apparatus 700 may be referred to the above description, and detailed descriptions thereof are omitted herein as appropriate to avoid redundancy. The device 700 includes at least one software functional module that can be stored in memory in the form of software or firmware (firmware) or cured in an Operating System (OS) of the device 700. The heat exchange station is a heat exchange station in a single-heat-source heat supply dendritic pipe network system, and the single-heat-source heat supply dendritic pipe network system comprises a water supply pipeline and a water return pipeline; the apparatus 700 includes:
An obtaining module 710, configured to obtain a heating pipe network diagram of a target area;
the pipe network abstract module 720 is configured to abstract the heat supply pipe network graph into a pipe network topological relation graph; wherein the pipe network topology graph comprises pipe nodes and dendritic pipe network lines, and the pipe nodes comprise water supply pipe nodes related to water supply pipes;
a construction and establishment module 730, configured to construct a pipe network heat medium flow path of each heat exchange station by using the pipe nodes, and establish a heating delay expression of each heat exchange station based on a target sub-path in the pipe network heat medium flow path of each heat exchange station; the target sub-path is a sub-path formed by water supply pipeline nodes, the heat supply delay expression is used for expressing the time spent by a heat source for conveying the heat medium to a corresponding heat exchange station, the heat supply delay expression comprises a plurality of sub-expressions, and the sub-expressions are used for expressing the time spent by the heat source for conveying the heat medium between two corresponding water supply pipeline nodes;
the analysis module 740 is configured to analyze water supply temperatures of two water supply pipeline nodes corresponding to the target sub-expression in all the sub-expressions to obtain a heat supply transmission and distribution delay corresponding to each target sub-expression; wherein the target sub-expression comprises one repeated sub-expression and/or a non-repeated sub-expression of the repeated sub-expressions;
And the summing module 750 is configured to sum the heat supply delay of all the sub-expressions in the heat supply delay expressions of each heat exchange station based on the heat supply delay of each target sub-expression, so as to obtain the heat supply delay of each heat exchange station.
Since the apparatus described in the foregoing embodiments of the present invention is an apparatus for implementing the method of the foregoing embodiments of the present invention, those skilled in the art will be able to understand the specific structure and modification of the apparatus based on the method of the foregoing embodiments of the present invention, and thus will not be described in detail herein. All devices used in the method according to the above embodiments of the present invention are within the scope of the present invention.
The present application also provides a storage medium having stored thereon a computer program which, when executed by a processor, performs the method of the method embodiment.
The present application also provides a computer program product which, when run on a computer, causes the computer to perform the method of the method embodiments.
It will be clear to those skilled in the art that, for convenience and brevity of description, reference may be made to the corresponding procedure in the foregoing method for the specific working procedure of the system described above, and this will not be repeated here.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. For the apparatus class embodiments, the description is relatively simple as it is substantially similar to the method embodiments, and reference is made to the description of the method embodiments for relevant points.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, for example, flow diagrams and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes. It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. The method for determining the heat supply delay of the heat exchange station is characterized in that the heat exchange station is a heat exchange station in a single-heat-source heat supply dendritic pipe network system, and the single-heat-source heat supply dendritic pipe network system comprises a water supply pipeline; the method comprises the following steps:
Acquiring a heating pipe network diagram of a target area;
abstracting the heat supply pipe network diagram into a pipe network topological relation diagram; wherein the pipe network topology graph comprises pipe nodes and dendritic pipe network lines, and the pipe nodes comprise water supply pipe nodes related to the water supply pipe;
constructing a pipe network heat medium flow path of each heat exchange station by utilizing the pipeline nodes, and establishing a heating delay expression of each heat exchange station based on a target sub-path in the pipe network heat medium flow path of each heat exchange station; wherein the target sub-path is a sub-path formed by the water supply pipeline nodes, the heating delay expression is used for expressing the time spent by a heat source for conveying the heat medium to a corresponding heat exchange station, the heating delay expression comprises a plurality of sub-expressions, and the sub-expressions are used for expressing the time spent by the heat source for conveying the heat medium between two corresponding water supply pipeline nodes;
analyzing the water supply temperatures of the two water supply pipeline nodes corresponding to the target sub-expression in all the sub-expressions to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression; wherein the target sub-expression comprises one repeated sub-expression and/or a non-repeated sub-expression of repeated sub-expressions;
And summing the heat supply transmission and distribution delays of all the sub-expressions in the heat supply delay expressions of each heat exchange station based on the heat supply transmission and distribution delays corresponding to each target sub-expression to obtain the heat supply delay of each heat exchange station.
2. The method of claim 1, wherein the single heat source heating branch pipe network system further comprises a return pipe, the pipe node comprising a first connection point, a second connection point, a third connection point, a fourth connection point, a water supply pipe junction, and a return pipe junction, the water supply pipe node comprising the first connection point, the second connection point, and the water supply pipe junction;
the first connecting point is used for representing the connecting point of the water supply pipeline and the heat source, the second connecting point is used for representing the connecting point of the water supply pipeline and the heat exchange station, the third connecting point is used for representing the connecting point of the water return pipeline and the heat source, and the fourth connecting point is used for representing the connecting point of the water return pipeline and the heat exchange station.
3. The method according to claim 1, wherein analyzing the water supply temperatures of the two water supply pipeline nodes corresponding to the target sub-expression in all the sub-expressions to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression comprises:
Collecting water supply temperature data of the water supply pipeline nodes in a target time period;
cleaning the water supply temperature data to obtain cleaned water supply temperature data;
and analyzing the water supply temperatures of the two water supply pipeline nodes corresponding to all target sub-expressions in all the sub-expressions based on the cleaned water supply temperature data so as to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression.
4. A method according to claim 3, wherein the cleaning process includes clearing data missing values, culling unreasonable data, and correcting unreasonable data.
5. The method of claim 4, wherein the two water supply pipe nodes corresponding to each sub-expression each comprise an initial pipe node and a terminal pipe node;
correspondingly, the analyzing the water supply temperature of the two water supply pipeline nodes corresponding to all the target sub-expressions in all the sub-expressions based on the cleaned water supply temperature data to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression comprises the following steps:
determining a reference temperature supply trend image of an initial pipeline node corresponding to the current target sub-expression and a plurality of temperature supply trend images to be compared of the terminal pipeline node based on the cleaned water supply temperature data; the current target sub-expression is any one of the target sub-expressions, each of the reference temperature-supply trend image and the plurality of temperature-supply trend images to be compared is intercepted according to a preset window required time, and the starting time corresponding to the reference temperature-supply trend image and the starting time corresponding to each temperature-supply trend image to be compared are different;
Comparing the reference temperature supply trend image with each to-be-compared temperature supply trend image, and taking the to-be-compared temperature supply trend image which is most similar to the reference temperature supply trend image as a target temperature supply trend image;
and taking the time difference between the starting time of the reference temperature supply trend image and the starting time of the target temperature supply trend image as the heat supply transmission and distribution delay corresponding to the current target sub-expression.
6. The method of claim 5, wherein the comparing the reference temperature profile image with each of the to-be-compared temperature profile images and taking the to-be-compared temperature profile image that is most similar to the reference temperature profile image as a target temperature profile image comprises:
and calculating the correlation of the reference temperature supply trend image and each temperature supply trend image to be compared by using a Pearson correlation coefficient algorithm, and taking the temperature supply trend image to be compared with the highest correlation as the target temperature supply trend image.
7. The device for determining the heat supply delay of the heat exchange station is characterized in that the heat exchange station is a heat exchange station in a single-heat-source heat supply dendritic pipe network system, and the single-heat-source heat supply dendritic pipe network system comprises a water supply pipeline; the device comprises:
The acquisition module is used for acquiring a heating pipe network diagram of the target area;
the pipe network abstraction module is used for abstracting the heat supply pipe network diagram into a pipe network topological relation diagram; wherein the pipe network topology graph comprises pipe nodes and dendritic pipe network lines, and the pipe nodes comprise water supply pipe nodes related to the water supply pipe;
the construction and establishment module is used for constructing a pipe network heat medium flow path of each heat exchange station by utilizing the pipeline nodes and establishing a heating delay expression of each heat exchange station based on a target sub-path in the pipe network heat medium flow path of each heat exchange station; wherein the target sub-path is a sub-path formed by the water supply pipeline nodes, the heating delay expression is used for expressing the time spent by a heat source for conveying the heat medium to a corresponding heat exchange station, the heating delay expression comprises a plurality of sub-expressions, and the sub-expressions are used for expressing the time spent by the heat source for conveying the heat medium between two corresponding water supply pipeline nodes;
the analysis module is used for analyzing the water supply temperatures of the two water supply pipeline nodes corresponding to the target sub-expression in all the sub-expressions so as to obtain the heat supply transmission and distribution delay corresponding to each target sub-expression; the target sub-expression includes one repeated sub-expression and/or a non-repeated sub-expression of repeated sub-expressions;
And the summation module is used for summing the heat supply transmission and distribution delays of all the sub-expressions in the heat supply delay expressions of each heat exchange station based on the heat supply transmission and distribution delays corresponding to each target sub-expression to obtain the heat supply delay of each heat exchange station.
8. A storage medium having stored thereon a computer program which, when executed by a processor, performs the method of determining a heating delay of a heat exchange station according to any of claims 1-7.
9. An electronic device, the electronic device comprising: a processor, a memory and a bus, said memory storing machine readable instructions executable by said processor, said processor in communication with said memory via the bus when said electronic device is operating, said machine readable instructions when executed by said processor performing the method of determining a heating delay of a heat exchange station according to any one of claims 1-7.
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