CN-116951544-B - Heat supply prediction model construction method based on tree topology

CN116951544BCN 116951544 BCN116951544 BCN 116951544BCN-116951544-B

Abstract

The invention provides a heat supply prediction model construction method based on tree topology, which comprises the following steps of S1, establishing a PWL model of boiler control parameters and boiler output heat, a PWL model of heat exchanger control parameters and heat exchanger output heat, a PWL model of heat exchanger output heat and heat exchanger input heat and a PWL model of boiler output heat and heat exchanger input heat by a PWL multistage linear fitting method. The method has the advantages that the heat transfer models among the devices and the devices are built, the control parameters are accurately predicted and adjusted, the waste is reduced, and the energy is saved.

Inventors

WANG JUN
REN YUMENG
ZHANG YINLU
LUO LIN
GAN KAI

Assignees

天津六百光年智能科技有限公司

Dates

Publication Date: 20260505
Application Date: 20230731

Claims (8)

1. The heat supply prediction model construction method based on tree topology is characterized by comprising the following steps of: s1, establishing a PWL model of boiler control parameters and boiler output heat, a PWL model of heat exchanger control parameters and heat exchanger output heat, a PWL model of heat exchanger output heat and heat exchanger input heat and a PWL model of boiler output heat and heat exchanger input heat by a PWL multistage linear fitting method; s2, constructing a secondary water supply heat prediction model according to historical heat supply data, or calculating theoretical heat supply heat according to heat load of building design; in the step S1: Calculating the output heat of a historical boiler through the historical water outlet temperature, the historical water return temperature and the historical water outlet flow of the boiler room; Establishing a PWL model of the boiler control parameters and the boiler output heat by using a PWL multistage linear fitting method through the historical boiler control parameters and the historical boiler output heat; Outputting the temperature of the outlet water through the history heat exchanger, outputting the temperature of the backwater through the history heat exchanger, and calculating the heat output by the history heat exchanger through the history heat exchanger output flow; Establishing a PWL model of the heat exchanger control parameters and the heat exchanger output heat by a PWL multistage linear fitting method through the historical heat exchanger control parameters and the historical heat exchanger output heat; Calculating the input heat of the history heat exchanger by inputting the output water temperature of the history heat exchanger, inputting the return water temperature of the history heat exchanger and inputting the flow of the history heat exchanger; establishing a PWL model of heat exchanger output heat and heat exchanger input heat by using a PWL multistage linear fitting method through the historical heat exchanger output heat and the historical heat exchanger input heat; Establishing a PWL model of the boiler output heat and the heat exchanger input heat by using a PWL multistage linear fitting method through the historical boiler output heat and the historical heat exchanger input heat; In step S2, a secondary water supply heat quantity prediction model is constructed by using the historical illumination intensity, the historical outdoor air temperature, the historical set room temperature, the historical average room temperature and the heat supply heat quantity of the historical heat exchanger.
2. The heat supply control method based on the tree topology is characterized by comprising the following steps of: a1, inputting real-time data into a secondary water supply heat prediction model to obtain theoretical heat supply, or calculating the theoretical heat supply heat according to the heat load of the building design, wherein the secondary water supply heat prediction model is constructed according to the method of claim 1; a2, inputting theoretical heat supply heat as theoretical heat exchanger output heat to a heat exchanger control parameter and a PWL model of the heat exchanger output heat to obtain the theoretical heat exchanger control parameter; The heat exchanger control parameters and the PWL model of heat exchanger output heat are constructed according to the method as claimed in claim 1.
3. The heating control method based on tree topology according to claim 2, further comprising the steps of: a3, taking the theoretical heat supply heat as theoretical heat exchanger output heat, and calculating theoretical heat exchanger input heat by using a PWL model of the heat exchanger output heat and the heat exchanger input heat; The PWL model of the heat exchanger output heat and the heat exchanger input heat is constructed according to the method of claim 1; A4, inputting the theoretical heat exchanger input heat into a PWL model of the boiler output heat and the heat exchanger input heat to obtain the theoretical boiler output heat; The PWL model of the output heat of the boiler and the input heat of the heat exchanger is constructed according to the method of the claim 1-claim; a5, inputting the theoretical boiler output heat into a boiler control parameter and a PWL model of the boiler output heat to obtain the theoretical boiler control parameter; The boiler control parameters and the PWL model of the boiler output heat are constructed according to the method of claim 1; a6, adjusting the boiler control parameter and the heat exchanger control parameter in real time according to the theoretical heat exchanger control parameter and the theoretical boiler control parameter.
4. A construction apparatus of a tree topology-based heating prediction model construction method according to claim 1, comprising: The acquisition module is used for acquiring historical heat supply data; the construction module is used for establishing a PWL model of boiler control parameters and boiler output heat, a PWL model of heat exchanger control parameters and heat exchanger output heat, a PWL model of heat exchanger output heat and heat exchanger input heat and a PWL model of boiler output heat and heat exchanger input heat through a PWL multistage linear fitting method; and constructing a secondary water supply heat prediction model according to the historical heat supply data.
5. A tree topology-based heating control device, comprising: the real-time data acquisition module is used for acquiring real-time data; the prediction module is used for implementing the following steps: a1, inputting real-time data into a secondary water supply heat prediction model to obtain theoretical heat supply, wherein the secondary water supply heat prediction model is constructed according to the method of claim 1; a2, inputting theoretical heat supply heat as theoretical heat exchanger output heat to a heat exchanger control parameter and a PWL model of the heat exchanger output heat to obtain the theoretical heat exchanger control parameter; The heat exchanger control parameters and the PWL model of heat exchanger output heat are constructed according to the method of claim 1; a3, taking the theoretical heat supply heat as theoretical heat exchanger output heat, and calculating theoretical heat exchanger input heat by using a PWL model of the heat exchanger output heat and the heat exchanger input heat; The PWL model of the heat exchanger output heat and the heat exchanger input heat is constructed according to the method of claim 1; A4, inputting the theoretical heat exchanger input heat into a PWL model of the boiler output heat and the heat exchanger input heat to obtain the theoretical boiler output heat; the PWL model of the output heat of the boiler and the input heat of the heat exchanger is constructed according to the method of claim 1; a5, inputting the theoretical boiler output heat into a boiler control parameter and a PWL model of the boiler output heat to obtain the theoretical boiler control parameter; The boiler control parameters and the PWL model of the boiler output heat are constructed according to the method of claim 1; and the control module is used for adjusting the boiler control parameters and the heat exchanger control parameters in real time according to the theoretical heat exchanger control parameters and the theoretical boiler control parameters.
6. An electronic device comprising a processor and a memory communicatively coupled to the processor for storing the processor-executable instructions, wherein the processor is configured to perform the method of any of claims 1-3.
7. A server comprising at least one processor and a memory communicatively coupled to the processor, the memory storing instructions executable by the at least one processor to cause the at least one processor to perform the method of any of claims 1-3.
8. A computer-readable storage medium, in which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method according to any one of claims 1-3.

Description

Heat supply prediction model construction method based on tree topology Technical Field The invention belongs to the technical field of model construction, and particularly relates to a heat supply prediction model construction method based on tree topology. Background The modern heating system is characterized in that high-temperature hot water is sent to a heat exchange station through a boiler or other heat sources, heat exchange is realized through plate exchange in the heat exchange station, heat is sent to a user through a secondary network, the room temperature is kept relatively stable most importantly for heating, an actual heating system is more complex, one heating station needs to correspond to a plurality of heat exchangers, a heating model is mainly built through calculating heat load, then heating parameters are controlled through manual PID (proportion integration differentiation) adjustment, the mode of controlling the heating parameters by building the heating model through control is problematic in that firstly, accurate linkage adjustment cannot be realized, all devices are independent of each other, large time lags are caused no matter PID or manual adjustment, all devices cannot reach balance at the same time, waste is caused, secondly, item access is slow, traditional item access requires an equipment engineer or an item manager to know about each link and a regulation strategy of each device, and time and labor are consumed. Disclosure of Invention In view of the above, the present invention aims to provide a method for constructing a heat supply prediction model based on tree topology, so as to solve at least one of the above technical problems. In order to achieve the above purpose, the technical scheme of the invention is realized as follows: the first aspect of the invention provides a heat supply prediction model construction method based on tree topology, which comprises the following steps: s1, establishing a PWL model of boiler control parameters and boiler output heat, a PWL model of heat exchanger control parameters and heat exchanger output heat, a PWL model of heat exchanger output heat and heat exchanger input heat and a PWL model of boiler output heat and heat exchanger input heat by a PWL multistage linear fitting method; S2, constructing a secondary water supply heat prediction model according to the historical heat supply data, or calculating theoretical heat supply heat according to the heat load of the building design. Further, in the step S1: Calculating the output heat of a historical boiler through the historical water outlet temperature, the historical water return temperature and the historical water outlet flow of the boiler room; Establishing a PWL model of the boiler control parameters and the boiler output heat by using a PWL multistage linear fitting method through the historical boiler control parameters and the historical boiler output heat; Outputting the temperature of the outlet water through the history heat exchanger, outputting the temperature of the backwater through the history heat exchanger, and calculating the heat output by the history heat exchanger through the history heat exchanger output flow; Establishing a PWL model of the heat exchanger control parameters and the heat exchanger output heat by a PWL multistage linear fitting method through the historical heat exchanger control parameters and the historical heat exchanger output heat; Calculating the input heat of the history heat exchanger by inputting the output water temperature of the history heat exchanger, inputting the return water temperature of the history heat exchanger and inputting the flow of the history heat exchanger; establishing a PWL model of heat exchanger output heat and heat exchanger input heat by using a PWL multistage linear fitting method through the historical heat exchanger output heat and the historical heat exchanger input heat; And establishing a PWL model of the boiler output heat and the heat exchanger input heat by using a method of PWL multistage linear fitting of the historical boiler output heat and the historical heat exchanger input heat. In step S2, a secondary water supply heat prediction model is constructed from the historical illumination intensity, the historical outdoor air temperature, the historical set room temperature, the historical average room temperature and the historical heat exchanger heat supply heat. The second aspect of the invention provides a heat supply control method based on tree topology, comprising the following steps: A1, inputting real-time data into a secondary water supply heat prediction model to obtain theoretical heat supply heat, or calculating the secondary water supply heat according to the heat load of the building design, wherein the secondary water supply heat prediction model is constructed according to the method in the first aspect; a2, inputting theoretical heat supply heat as theoretical heat exchanger o