Heat exchange station adjusting method and system based on outdoor temperature and secondary heating temperature difference

Abstract

The invention belongs to the technical field of heat exchange station automatic control, and provides a heat exchange station adjusting method and system based on the outdoor temperature and the secondary heating temperature difference, firstly, the outdoor temperature change rate is determined according to the ratio of the outdoor temperature difference to the secondary heating return water temperature difference; then, the secondary heating water supply temperature set value is corrected according to the ratio of the product of the difference value of the secondary heating water supply temperature and the secondary heating return water temperature and the outdoor temperature change rate to the temperature adjusting sensitivity, and the corrected secondary heating water supply temperature set value is obtained; and finally, the corrected secondary heating water supply temperature set value serves as a control target, and heat exchange station adjustment is conducted. The outdoor temperature change rate is determined according to the ratio of the outdoor temperature difference to the secondary heating return water temperature difference, then the secondary heating water supply temperature set value is corrected through the outdoor temperature change rate, the influence of outdoor temperature change and secondary heating water supply and return water temperature difference change on specific control is considered, and the control precision is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automatic control of heat exchange stations, and in particular relates to a heat exchange station adjustment method and system based on the temperature difference between outdoor temperature and secondary heating. Background Art

[0002] In the central heating system, the heat exchange station is the core hub connecting the heat network and users, and plays an important role in heat conversion, transmission, heat regulation and distribution. However, the current operation of heat exchange stations mostly relies on manual control, fixed valve opening control, fixed primary flow control, fixed secondary pressure difference control, segmented control, fuzzy control, conventional valve PID control, and circulating pump PID control. These methods have significant disadvantages such as high labor cost, lag in regulation, high energy consumption, and low efficiency. In particular, they cannot flexibly adjust the heating amount according to the rate of change of outdoor temperature and the energy demand at the end of secondary heating, resulting in waste of heat energy or insufficient supply.

[0003] The emergence of control methods such as outdoor temperature climate compensation control and segmented control has compensated for the waste or insufficient supply of heat energy to a certain extent. However, when adjusting the heat exchange station through data such as outdoor temperature and secondary heating temperature, it is necessary to go through tedious logical judgment, a large amount of field data accumulation and multiple experimental attempts to achieve it, and the influence of outdoor temperature changes and changes in the temperature difference between the secondary heating supply and return water on the specific control opening is not considered, and the control accuracy is not high; specifically, the current control algorithm cannot automatically adjust the secondary heating water supply temperature in real time according to the changes in outdoor temperature to adapt to changes in heat energy demand and reduce waste or shortage of heat energy, and cannot adjust the supply of heating heat energy according to changes in the temperature difference between the secondary heating supply and return water (that is, the actual heat energy consumption at the end) to achieve a balance between heating and heating. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a heat exchange station adjustment method and system based on the outdoor temperature and the secondary heating temperature difference. First, the outdoor temperature change rate K is determined according to the change of the outdoor temperature in a unit time (the time interval can be set):

[0005]

[0006] Among them, W x The current outdoor temperature, unit: ℃; W g is the historical outdoor temperature, unit: ℃; T is the sampling interval, unit: h.

[0007] When the rate K>0, it means that the outdoor temperature is rising, and when the rate K<0, it means that the outdoor temperature is falling. The larger the absolute value of the rate K, the more drastic the change in outdoor temperature.

[0008] Then calculate the change rate B of the secondary heating temperature difference at different sampling time points,

[0009]

[0010] Among them, G x is the current temperature of secondary heating water supply, unit: °C; Gg is the historical temperature of secondary heating water supply, unit: °C; H X is the current temperature of the secondary heating return water, unit: ℃; H G is the historical temperature of secondary heating return water, unit: ℃;.

[0011] When the change rate B>1, it means that the terminal heat energy demand increases. When the change rate B<1, it means that the terminal heat energy demand decreases. The larger the absolute value of B, the more drastic the change in terminal energy demand.

[0012] The set value of the secondary heating water supply temperature is determined based on the values ​​of K and B. This takes into account the impact of changes in outdoor temperature and changes in the heat energy demand at the secondary heating terminal on specific control, improves control accuracy and achieves the purpose of on-demand function.

[0013] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0014] In a first aspect, the present invention provides a heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference, comprising:

[0015] Determine the outdoor temperature change rate according to the change value of the outdoor temperature within a unit time (the time interval can be set);

[0016] The temperature difference between the secondary heating water supply temperature and the secondary heating return water temperature at different time points is used to calculate the secondary heating temperature difference change rate, that is, the secondary terminal heat demand change rate;

[0017] Then, the product of the outdoor temperature change rate and the secondary heating temperature difference change rate is multiplied by a temperature adjustment sensitivity α to correct the set value of the secondary heating water supply temperature to obtain the corrected secondary heating water supply temperature set value.

[0018] The heat exchange station is adjusted using the corrected secondary heating water supply temperature set value as the control target.

[0019] Furthermore, the outdoor temperature difference is equal to the difference between the current outdoor temperature and the historical outdoor temperature difference. The outdoor temperature change rate K is:

[0020]

[0021] Among them, W x The current outdoor temperature, unit: ℃; W gis the historical temperature of the outdoor temperature, unit: ℃; T is the sampling interval, unit: h; when the rate is positive, it means the outdoor temperature is rising, when the rate is negative, it means the outdoor temperature is falling, and the larger the absolute value of the rate, the more drastic the change in outdoor temperature.

[0022] Furthermore, the secondary heating supply and return water temperature difference is equal to the difference between the secondary heating supply water temperature and the secondary heating return water temperature at the same time point. The secondary heating temperature difference change rate B is:

[0023]

[0024] Among them, G x is the current temperature of secondary heating water supply, unit: ℃; G g is the historical temperature of secondary heating water supply, unit: ℃; H x is the current temperature of the secondary heating return water, unit: ℃; H g It is the historical temperature of secondary heating return water, unit: ℃; when the change rate B>1, it means that the terminal heat energy demand increases, and when the change rate B<1, it means that the terminal heat energy demand decreases. The larger the absolute value of B, the more drastic the change in terminal heat energy demand.

[0025] Furthermore, the corrected current setting value S of the secondary heating water supply temperature x for:

[0026]

[0027] Simplified to:

[0028] S x =S g -K*B*α;

[0029] Among them, S g is the historical secondary heating water supply temperature setting value; K is the outdoor temperature change rate; B is the secondary heating temperature difference change rate; α is the temperature adjustment sensitivity.

[0030] Furthermore, by adjusting the opening of the primary heat source valve, the secondary heating water supply temperature is controlled so that the actual secondary heating water supply temperature is close to the secondary heating water supply temperature set value corrected with changes in outdoor temperature and changes in secondary terminal heat energy demand.

[0031] Furthermore, the opening of the primary heat source valve is adjusted to:

[0032]

[0033] Among them, F is the opening degree of the primary heating valve that needs to be adjusted; K p , K i and K i are proportional, integral and differential parameters respectively; S xG is the corrected secondary heating water supply temperature setting value; x It is the current secondary heating water supply temperature.

[0034] In a second aspect, the present invention further provides a heat exchange station regulation system based on the outdoor temperature and the secondary heating temperature difference, comprising:

[0035] The outdoor temperature change rate determination module is configured to: determine the outdoor temperature change rate according to the change value of the outdoor temperature within a unit time;

[0036] The secondary heating temperature difference change rate determination module is configured to: calculate the secondary heating temperature difference change rate, that is, the terminal heat demand change rate, according to the secondary heating temperature difference between the secondary heating water supply temperature and the secondary heating return water temperature at different time points;

[0037] The correction module is configured to correct the secondary heating water supply temperature setting value by multiplying the product of the outdoor temperature change rate and the secondary heating temperature difference change rate by the product of the temperature adjustment sensitivity to obtain a corrected secondary heating water supply temperature setting value;

[0038] The regulating module is configured to: adjust the heat exchange station with the corrected secondary heating water supply temperature set value as the control target.

[0039] In a third aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference described in the first aspect.

[0040] In a fourth aspect, the present invention further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein when the processor executes the program, the steps of the heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference described in the first aspect are implemented.

[0041] In a fifth aspect, the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference described in the first aspect are implemented.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] 1. The present invention first determines the rate of change of the outdoor temperature according to the change of the outdoor temperature per unit time, then calculates the rate of change of the temperature difference of the secondary heating supply and return water temperatures at different time points, and determines the set value of the secondary heating supply water temperature according to the values ​​of K and B. In this way, the influence of the outdoor temperature change and the change of the heat energy demand at the secondary heating terminal on the specific control is considered at the same time, thereby improving the control accuracy and achieving the purpose of on-demand function.

[0044] 2. The present invention not only considers the impact of outdoor temperature changes on the thermal energy demand of the secondary heating terminal, but also considers the impact of the actual thermal energy consumption of the secondary heating terminal on the thermal energy demand of the secondary heating terminal through determining the climate change rate and the secondary heating temperature difference change rate, and correcting the secondary heating water supply temperature setting value, as well as the specific control algorithm. This makes the entire system energy-saving while having the characteristics of balanced stability, rapid adjustment, automatic adjustment, on-demand function, energy saving and consumption reduction.

[0045] 3. The present invention provides a simple and specific determination method for calculating the outdoor temperature change rate, the secondary heating temperature difference change rate and the secondary heating water supply temperature set value correction. When used in combination with the PID control algorithm, it avoids dependence on cumbersome judgment logic, complex networks, high-computing-power equipment and host computers while ensuring control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0047] Figure 1 This is a system and working principle diagram of Embodiment 1 of the present invention;

[0048] Among them, 1. Primary heat source water supply pipeline; 2. Primary heat source return pipeline; 3. Secondary heating water supply pipeline; 4. Secondary heating return pipeline; 5. Outdoor temperature change sampler; 6. Primary heat source regulating valve; 7. Secondary heating water supply temperature sensor; 8. Secondary heating return temperature sensor; 9. Sampling control line; 10. Heat exchanger; 11. PLC controller. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0051] Embodiment 1:

[0052] The traditional heat exchange station control method has significant disadvantages such as high labor cost, lag in regulation, high energy consumption, and low efficiency. In particular, it is impossible to flexibly adjust the heating amount according to the outdoor temperature changes and the energy demand of the secondary heating terminal, resulting in problems such as heat energy waste or insufficient supply. This embodiment provides a heat exchange station regulation method based on outdoor temperature and secondary heating temperature difference, using a conventional PLC controller without relying on high computing power equipment. Through the rate of change of outdoor temperature and the rate of change of the secondary heating temperature difference, the mathematical calculation and PID regulation function of the PLC are used to control the opening of the primary water supply regulating valve, thereby achieving precise control of the secondary heating water supply temperature and the supply and return water temperature difference; the method in this embodiment not only considers the impact of outdoor temperature changes on the heat energy demand of the secondary heating terminal, but also considers the impact of the actual heat energy consumption of the secondary heating terminal on the heat energy demand of the secondary heating terminal, so that the entire system is energy-saving while having the characteristics of balanced stability, rapid regulation, automatic regulation, on-demand function, energy saving and consumption reduction.

[0053] The method in this embodiment mainly includes the following steps:

[0054] S1. Data collection:

[0055] Optionally, the corresponding sensor at the preset position collects parameters once every sampling time interval T, and the collected data mainly includes the current outdoor temperature W x , historical outdoor temperature W g , Current secondary heating water supply temperature G x , Historical secondary heating water supply temperature G g , Current secondary heating return water temperature H x , Historical secondary heating return water temperature H g , the current primary heat source valve opening F x and the historical primary heat source valve opening F g wait.

[0056] Optionally, set the system sampling time interval T for the heating season to collect system parameters: the current outdoor temperature is W x , the outdoor temperature half an hour ago was W g ; Current secondary heating water supply temperature value G x , the secondary heating water temperature half an hour ago was G x ; Current secondary heating return water temperature value H x , the secondary heating return water temperature value H half an hour ago g ; The current secondary heating water supply temperature setting value is S x , the secondary heating water supply temperature setting value half an hour ago is S g ; The current heating valve opening is F x , half an hour ago, the heating valve opening was Fg .

[0057] S2. Determine the outdoor temperature change rate according to the outdoor temperature change value in unit time (the sampling time interval can be set). The outdoor temperature change rate K is equal to the current outdoor temperature W x and historical outdoor temperature W g The difference is then compared to the sampling time interval T. Specifically:

[0058]

[0059] Among them, W x The current outdoor temperature, unit: ℃; W g is the outdoor temperature history temperature, unit: ℃; W g is the sampling interval, unit: h. When the rate is positive, it means the outdoor temperature is rising, and when the rate is negative, it means the outdoor temperature is falling. The larger the absolute value of the rate, the more drastic the change in outdoor temperature.

[0060] Calculate the outdoor temperature change rate K at any time. K represents the rate of change of outdoor temperature per unit time. When K>0, it means the outdoor temperature rises. When K<0, it means the outdoor temperature drops. The larger the absolute value of the rate K, the more drastic the outdoor temperature change. The rate K has a direct impact on the demand for heat energy at the end of secondary heating and an indirect impact on the return water temperature of secondary heating.

[0061] S3. Calculate the secondary heating temperature difference change rate based on the temperature difference between the secondary heating water supply temperature and the secondary heating return water temperature at different sampling time points, wherein the secondary heating temperature difference change rate is equal to the difference between the current secondary heating water supply temperature and the current secondary heating return water temperature divided by the difference between the historical secondary heating water supply temperature and the historical secondary heating return water temperature. Specifically:

[0062]

[0063] Among them, G x is the current temperature of secondary heating water supply, unit: ℃; G g is the historical temperature of secondary heating water supply, unit: ℃; H X is the current temperature of the secondary heating return water, unit: ℃; H g is the historical temperature of the secondary heating return water, unit: ℃;) When the change rate B>1, it means that the terminal heat energy demand has increased, and when the change rate B<1, it means that the terminal heat energy demand has decreased. The larger the absolute value of B, the more drastic the change in the terminal energy demand. When the secondary heating temperature difference change rate B>1, it means that the terminal heat energy demand has increased, and when the secondary heating temperature difference change rate B<1, it means that the terminal heat energy demand has decreased. The larger the absolute value of the secondary heating temperature difference change rate B, the more drastic the change in the terminal energy demand.

[0064] S4. Calculate the secondary heating water supply temperature setting value based on the outdoor temperature change rate and the secondary heating temperature difference change rate analysis:

[0065] The product of the outdoor temperature change rate and the secondary heating temperature difference change rate is multiplied by the temperature adjustment sensitivity ratio to correct the secondary heating water supply temperature setting value to obtain the corrected secondary heating water supply temperature setting value. The corrected secondary heating water supply temperature current setting value S x for:

[0066]

[0067] Simplified:

[0068] S x =S g -K*B*α;

[0069] Among them, S g is the historical secondary heating water supply temperature setting value; K is the outdoor temperature change rate; B is the secondary heating temperature difference change rate; α is the temperature adjustment sensitivity, which can be set by the operator or preset by other means. By correcting the secondary heating water supply temperature setting value S x , achieving dynamic response to outdoor temperature and end-user demand, significantly improving heating efficiency.

[0070] S5, PID control implementation:

[0071]

[0072] Among them, F is the opening degree of the primary heating valve that needs to be adjusted; K p , K i and K i They are proportional, integral and differential parameters, which are PID adjustment parameters; S x G is the corrected secondary heating water supply temperature setting value; x It is the current secondary heating water supply temperature.

[0073] The main function of step S5 is to control the amount of heat energy supplied to the primary network by adjusting the opening of the primary heat source valve, thereby controlling the secondary heating water supply temperature. The use of the PID algorithm reduces the volatility and hysteresis of the system, reduces the need for manual intervention, and allows the actual secondary heating water supply temperature G x Close to the secondary heating water supply temperature setting value S after being adjusted according to the change of outdoor temperature and the temperature difference of secondary heating x , to achieve the goal of energy supply on demand and energy supply balance.

[0074] According to the combination of step S2, step S3, step S4 and the application of PID algorithm, it has a high degree of intelligence and meets the requirements of green buildings and sustainable development; it does not require a large amount of historical data and the problem of heat supply lag in control, and requires fewer parameters to be adjusted, which reduces the difficulty of operators and can achieve optimal automatic control without networking. It also uses conventional PLC control, and does not require expensive high-computing power equipment.

[0075] S6. Optimization:

[0076] The collected data is calculated and analyzed at sampling time intervals to dynamically adjust the target water supply temperature S x The opening of the primary heat source valve is controlled in real time to achieve energy supply balance and high efficiency energy saving. The heating energy is adjusted in real time according to the outdoor temperature change and the secondary heating temperature difference change rate to avoid heat supply imbalance. At the same time, complex manpower calculations and energy waste caused by conventional overheating are avoided.

[0077] By adjusting the α value (the operator set value, the reaction), the proportion of the secondary heating supply and return water temperature difference in the system can be adjusted according to the actual terminal feedback situation, so that the system and algorithm are more accurate and the terminal temperature is more comfortable.

[0078] Through this embodiment, the secondary heating water supply temperature is adjusted in real time according to the outdoor temperature change rate and the secondary heating temperature difference change rate to adapt to the change of heat energy demand, thereby reducing heat energy waste or shortage; the supply of heating heat energy is adjusted according to the change of the secondary heating supply and return water temperature difference (i.e., the actual heat energy consumption at the end of secondary heating), thereby achieving a balance between supply and heating; through local automatic control (PLC control), the dependence on complex networks and host computers is avoided; the dependence on historical data is reduced, the requirements of the intelligent control method on the computing power of the equipment are reduced, and control failures caused by changes in system characteristics are avoided; and the coordination cost of the intelligent algorithm and the underlying controller parameters is reduced, simplifying the maintenance process.

[0079] In some other embodiments, a machine learning algorithm can be introduced to fine-tune the control strategy of the PLC using a simple machine learning algorithm without relying on a large amount of historical data to adapt to the heating needs in different regions and different climatic conditions. Adding remote monitoring and diagnosis functions is different from the emphasis on local deployment in this embodiment, but through safe and reliable remote communication means, remote monitoring and fault diagnosis of the operating status of the heat exchange station can be achieved to improve operation and maintenance efficiency. Modular design divides the heat exchange station automatic control system into multiple functional modules, which is convenient for flexible configuration and upgrading according to the actual needs of different heat exchange stations. Energy management system integration combines the method in the embodiment with the energy management system to achieve overall optimization and energy efficiency management of the heating system, and further improve energy saving and consumption reduction effects.

[0080] Embodiment 2:

[0081] To further illustrate Example 1, Figure 1 As described above, this embodiment provides a heat exchange station regulation system based on the outdoor temperature and the secondary heating temperature difference, including a primary heat source regulating valve 6 arranged on a primary heat source water supply pipe 1, a secondary heating water supply temperature sensor 7 arranged on a secondary heating water supply pipe 3, a secondary heating return water temperature sensor 8 arranged on a secondary heating return water pipe 4, an outdoor temperature change sampler 5, and a PLC controller 11. The primary heat source regulating valve 6, the secondary heating water supply temperature sensor 7, the outdoor temperature change sampler 5, and the secondary heating return water temperature sensor 8 are all connected to the PLC controller 11 through a sampling control line 9.

[0082] Optionally, the outdoor temperature change sampler 5 is used to collect outdoor temperature data, and a temperature sensor can be used. The primary heat source regulating valve 6 is used to adjust the flow of the primary heat source; the PLC controller 11 is the core of the system, completing data processing, logical operations and control output. The secondary heating water supply temperature sensor 7 and the secondary heating return water temperature sensor 8 monitor the secondary heating water supply and return water temperatures respectively.

[0083] The working process of the system in this embodiment may include collecting outdoor temperature and supply and return water temperature data at set time intervals; calculating the climate change rate K, the secondary heating temperature difference change rate B and the target water supply temperature S x According to S x , G x , F x The value of and other set adjustment parameters adjust the primary heat source valve opening; so that G x Close to S x The real-time recorded system operation data facilitates subsequent optimization and troubleshooting.

[0084] The working method of the system is the same as the heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference in Example 1, and will not be repeated here.

[0085] Embodiment 3:

[0086] This embodiment provides a heat exchange station adjustment system based on the outdoor temperature and the secondary heating temperature difference, including:

[0087] The outdoor temperature change rate determination module is configured to: determine the outdoor temperature change rate according to the ratio of the difference between the outdoor current temperature and the outdoor historical temperature to the sampling time interval;

[0088] The secondary heating temperature difference change rate determination module is configured to determine the secondary heating temperature difference change rate according to the value of the current secondary heating supply and return water temperature difference compared with the historical secondary heating supply and return water temperature difference.

[0089] The correction module is configured to correct the secondary heating water supply temperature setting value by multiplying the product of the outdoor temperature change rate and the secondary heating temperature difference change rate by the product of the temperature adjustment sensitivity to obtain a corrected secondary heating water supply temperature setting value;

[0090] The regulating module is configured to: adjust the heat exchange station with the corrected secondary heating water supply temperature set value as the control target.

[0091] The working method of the system is the same as the heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference in Example 1, and will not be repeated here.

[0092] Embodiment 4:

[0093] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference described in Example 1 are implemented.

[0094] Embodiment 5:

[0095] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the program, the steps of the heat exchange station adjustment method based on outdoor temperature and secondary heating temperature difference described in Example 1 are implemented.

[0096] Embodiment 6:

[0097] This embodiment provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference described in Example 1 are implemented.

[0098] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A heat exchange station adjustment method based on the temperature difference between outdoor temperature and secondary heating, characterized in that: include: Determine the outdoor temperature change rate based on the ratio of the difference between the outdoor current temperature and the outdoor historical temperature to the sampling time interval; Determine the secondary heating temperature difference change rate according to the value of the current secondary heating supply and return water temperature difference compared with the historical secondary heating supply and return water temperature difference; The secondary heating water supply temperature setting value is corrected by multiplying the product of the outdoor temperature change rate and the secondary heating temperature difference change rate by the product of the temperature adjustment sensitivity to obtain a corrected secondary heating water supply temperature setting value; The heat exchange station is adjusted using the corrected secondary heating water supply temperature set value as the control target.

2. The heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference according to claim 1, characterized in that: The outdoor temperature difference is equal to the difference between the current outdoor temperature and the historical outdoor temperature difference.

3. The heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference according to claim 1, characterized in that: The outdoor temperature change rate is equal to the ratio of the difference between the current outdoor temperature and the historical outdoor temperature to the sampling time interval.

4. The heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference according to claim 1, characterized in that: The secondary heating return water temperature difference is equal to the difference between the current secondary heating return water temperature and the historical secondary heating return water temperature.

5. The heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference according to claim 1, characterized in that: The secondary heating temperature difference change rate is equal to the ratio of the current secondary heating temperature difference to the historical secondary heating temperature difference.

6. The heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference according to claim 1, characterized in that: Corrected secondary heating water supply temperature setting value S x for: S x =S g -K*B*a; Among them, S g is the historical secondary heating water supply temperature setting value; K is the outdoor temperature change rate; B is the secondary heating temperature difference change rate; H x is the current secondary heating return water temperature; α is the temperature adjustment sensitivity.

7. The heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference according to claim 1, characterized in that: By adjusting the opening of the primary heat source valve, the secondary heating water supply temperature is controlled so that the actual secondary heating water supply temperature is close to the secondary heating water supply temperature set value corrected with changes in outdoor temperature and secondary heating temperature difference.

8. The heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference according to claim 6, characterized in that: Adjust the opening of the primary heat source valve to: Among them, F is the opening degree of the primary heating valve that needs to be adjusted; K p , K i and K i are proportional, integral and differential parameters respectively; S x G is the corrected secondary heating water supply temperature setting value; x It is the current secondary heating water supply temperature.

9. Heat exchange station regulation system based on outdoor temperature and secondary heating temperature difference, characterized in that: include: The outdoor temperature change rate determination module is configured to: determine the outdoor temperature change rate according to the change value of the outdoor temperature within a unit time; The secondary heating temperature difference change rate determination module is configured to: calculate the secondary heating temperature difference change rate, that is, the terminal heat demand change rate, according to the secondary heating temperature difference between the secondary heating water supply temperature and the secondary heating return water temperature at different time points; The correction module is configured to correct the secondary heating water supply temperature setting value by multiplying the product of the outdoor temperature change rate and the secondary heating temperature difference change rate by the product of the temperature adjustment sensitivity to obtain a corrected secondary heating water supply temperature setting value; The regulating module is configured to: adjust the heat exchange station with the corrected secondary heating water supply temperature set value as the control target.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the heat exchange station adjustment method based on the outdoor temperature and the secondary heating temperature difference as described in any one of claims 1 to 8 are implemented.

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