Multi-user central heating pipe network temperature balance control adjustment method

Abstract

The application discloses a kind of multi-user centralized heating pipe network temperature balance control adjustment method, through actual indoor and outdoor temperature, historical operation data prediction heat load, control valve opening adjustment actual circulating flow and the deviation between design flow, calculate predicted load return water temperature, carry out thermal and hydraulic balance adjustment to primary network, then carry out thermal and hydraulic balance adjustment to secondary network, then carry out thermal and hydraulic balance adjustment to each user unit, repeat the above steps to make heat network whole reach thermal and hydraulic balance state.The application can effectively alleviate the adjustment difficulty caused by strong coupling and hysteresis between primary and secondary network and different users, greatly improve the work efficiency of heat network temperature balance adjustment, reduce the time and energy of traditional heat network consumption personnel, improve the overall coordination and scheduling capability of heating system, avoid the waste of heat and electricity caused by traditional heat network adjustment mode, and the uneven heating and high complaint rate caused by water and thermal imbalance.

Description

Technical Field

[0001] This invention belongs to the field of smart heating technology, and in particular relates to a method for temperature balance control and regulation of multi-user centralized heating network. Background Technology

[0002] With the advancement of industrial informatization and the rapid increase in heating demand in northern regions, the centralized heating system, a major basic guarantee for heating in northern China, is gradually undergoing automated control. Most regional heating companies' control centers now possess the capability for online monitoring and remote control of the heating network's operational status, meeting the basic conditions for intelligent control. However, due to a lack of specific intelligent control strategies and temperature balance adjustment methods, heating companies still rely primarily on experience when adjusting the heating network, often adhering to the principle of "only more, not less," which frequently leads to significant waste of heat and electricity in the heating system. This results in generally high heating energy consumption indicators, greatly reducing the profit margins of heating companies. Conventional heating network adjustment methods consider the coordination between primary and secondary networks, adjusting the primary and secondary networks and user units separately. This often leads to partial hydraulic and thermal imbalances in the primary and secondary networks after the end-point adjustments are completed. The strong coupling and lag of the heating system result in poor adjustment effects, repeated adjustment work, and increased workload and time costs for maintenance personnel. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention aims to provide a method for temperature balance control and regulation of multi-user centralized heating network, which solves the problems of difficulty in thermo-hydraulic balance regulation, high heating energy consumption and huge workload in large centralized heating network.

[0004] This invention is achieved through the following technical solution:

[0005] A method for temperature balance control and regulation of a multi-user centralized heating network, comprising,

[0006] Step 1: Predict the heat load using actual indoor and outdoor temperatures and historical operating data, control the valve opening to adjust the deviation between the actual circulating flow rate and the preset flow rate of the primary network, and perform hydraulic balance adjustment on the primary network.

[0007] Step 2: Based on the determined flow rate of the primary circulating network, calculate the return water temperature of the primary network to predict the heat load, and adjust the primary network for thermal and hydraulic balance.

[0008] Step 3: Based on the initial thermal and hydraulic balance of the primary network, adjust the thermal and hydraulic balance of the secondary network;

[0009] Step 4: Based on the initial thermal and hydraulic balance of the secondary network, adjust the thermal and hydraulic balance of each user unit;

[0010] Step 5: Repeat steps 2, 3, and 4 to bring the entire heating network into a state of thermal-hydraulic balance.

[0011] Preferably, the specific process of hydraulic balance adjustment of the primary network in step 1 is as follows:

[0012] Based on the real-time circulating flow rate, supply and return water temperature, and indoor and outdoor temperature obtained from the centralized control platform, and based on historical operating data to determine the predicted heat load, the opening of the electric regulating valves of the primary network, secondary network, and each unit user is adjusted to the maximum. Based on the deviation between the actual circulating flow rate of the primary network and the preset flow rate of the primary network, the hydraulic balance adjustment of the primary network is carried out.

[0013] Preferably, the formula for calculating the predicted heat load is:

[0014]

[0015] In the formula: Q′ is the predicted heat load, Q is the heat load corresponding to the preset outdoor temperature in historical data, and t n To specify the indoor temperature for heating, t w The preset outdoor temperature for heating, t′ w This represents the actual outdoor temperature.

[0016] Preferably, the formula for calculating the deviation between the actual circulating network traffic and the preset circulating network traffic is as follows:

[0017]

[0018] In the formula: G1′ is the ratio of the actual circulating network traffic to the preset network traffic, where G1′ is the actual network traffic and G1 is the preset network traffic.

[0019] Preferably, the control valves regulate the thermal and hydraulic balance of the primary network in accordance with the basic formula for heating load regulation:

[0020]

[0021] Δt1′=t′ g1 -t′ h1 ;

[0022]

[0023]

[0024] In the formula: This represents the ratio of the actual heat output of the network to the preset heat output of the network. This represents the ratio of actual network traffic to the preset network traffic. t is the ratio of the actual primary return water temperature to the preset primary return water temperature. h1 The target value for regulating the return water temperature of the primary network is calculated, where b1 is the coefficient of the primary network heat dissipation equipment, and t′ is the value of the target value. g1 t′ represents the actual water supply temperature of the central network. h1 Δt1′ represents the actual return water temperature of the primary network, and Δt1′ represents the difference between the actual return water temperature and the target return water temperature; m is taken as 1 / 3, t n To specify the indoor temperature for heating, t w The preset outdoor temperature for heating, t′ w Δt1′ represents the actual outdoor temperature; Δt1′ represents the temperature difference between the actual supply water temperature and the actual return water temperature of the primary water network.

[0025] Preferably, the specific process of thermal and hydraulic balance regulation of the primary network is as follows: based on the actual primary network supply water temperature obtained from monitoring and the calculated return water temperature of the predicted heat load, the opening of the primary network valve is adjusted to bring the actual primary network return water temperature close to the primary network return water temperature of the predicted heat load. If the actual primary network return water temperature is higher than the calculated return water temperature of the predicted heat load, the primary network electric regulating valve is closed; conversely, the primary network electric regulating valve is opened, until the difference between the actual primary network return water temperature and the calculated return water temperature of the predicted heat load is less than 0.5℃. The opening of the primary network electric regulating valve is kept unchanged, thereby achieving thermal and hydraulic balance regulation of the primary network.

[0026] Preferably, the secondary network return water temperature adjustment is based on the following formula:

[0027]

[0028] In the formula: t h2 The target value for regulating the return water temperature of the secondary network is t′. g2 t′ represents the actual secondary water supply temperature. h2 β represents the actual return water temperature of the secondary network, and β is the coefficient of the secondary network heat dissipation equipment; it is related to the equipment itself; t w For the outdoor design temperature for heating, t′ w This is the actual outdoor temperature. This is the ratio of the actual circulating secondary network traffic to the preset secondary network traffic.

[0029] Preferably, the specific process for thermal and hydraulic balance regulation of the secondary network is as follows:

[0030] Using the indoor temperature monitored by the room temperature measuring point and the target value of the secondary network return water temperature calculated according to the formula, the opening of the electric regulating valve is adjusted according to the difference between the calculated target value and the actual secondary network return water temperature. If the actual secondary network return water temperature is higher than the target value, the opening of the electric regulating valve is reduced, and vice versa, until the difference between the actual secondary network return water temperature and the target value is less than 0.5℃, and the opening of the electric regulating valve is kept unchanged.

[0031] Preferably, the user-end adjustment method follows the basic formula for quality-flow optimization adjustment:

[0032]

[0033]

[0034] In the formula: t g3 The target value for adjusting the water supply temperature to the user unit, t h3 The target value for adjusting the return water temperature of the user unit is t′. g3 t′ represents the actual water supply temperature of the user unit. h3 b2 represents the actual return water temperature of the user unit, and b2 represents the heat dissipation coefficient of the user unit, which is related to the user terminal equipment itself; t w For the outdoor design temperature for heating, t′ w The actual outdoor temperature is given, and m is taken as 1 / 3. This is the heat ratio between the actual heat generated by each user unit and the preset heat generated by each user unit.

[0035] Preferably, the specific process for each user unit to perform thermal and hydraulic balance adjustment is as follows:

[0036] Obtain the supply and return water temperatures and circulation flow rates for each end-user unit. Adjust the electric regulating valves on each unit's branch circuit individually to ensure the difference between the return water temperature and the calculated return water temperature is within a reasonable range. Then repeat the adjustment process from the primary network to the user units, thus completing the overall temperature balance.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] This invention provides a method for temperature balance control and regulation of a multi-user centralized heating network, comprising five steps. First, based on real-time operating data such as primary network circulation flow, supply and return water temperatures, and outdoor temperature obtained from the centralized control platform, and using historical operating data, the predicted heat load is determined. The opening of the electric regulating valves for the primary network, secondary network, and individual users is adjusted to the maximum. Then, the return water temperature of the primary network under the predicted load is calculated using the primary network return water temperature regulation formula. The difference between the actual and calculated return water temperatures guides the adjustment of the primary network electric regulating valve openings until the difference is within a reasonable range, maintaining the primary network electric regulating valve opening unchanged. Next, real-time operating data such as secondary network circulation flow, supply and return water temperatures, and outdoor temperature are obtained. The heat load is determined based on historical operating data of the secondary network. The return water temperature of the secondary network under the predicted load is calculated using the return water temperature regulation formula. The opening of the secondary network electric regulating valve is adjusted based on the difference between the actual and calculated return water temperatures. The calculation of the return water temperature difference guides the adjustment of the opening of the electric regulating valves in the secondary network. Once the difference is within a reasonable range, the valve opening remains unchanged. The supply and return water temperatures and circulation flow rates of each end-user unit are obtained, and the electric regulating valves of each unit's branch are adjusted one by one to ensure that the difference between the return water temperature of each unit and the calculated return water temperature is within a reasonable range. This adjustment process is then repeated from the primary network to the user units, thus completing the overall temperature balance. This invention solves the problems of difficult thermal and hydraulic balance adjustment, high heating energy consumption, and huge workload in large-scale centralized heating networks. It effectively alleviates the adjustment difficulties caused by the strong coupling and lag between the primary and secondary networks and different users, significantly improves the efficiency of heating network temperature balance adjustment, reduces the time and effort consumed by personnel in traditional heating networks, improves the overall coordination and scheduling capabilities of the heating system, and avoids the waste of heat and electricity caused by traditional heating network adjustment methods, as well as the problems of uneven heating and high complaint rates caused by water and thermal imbalances. It enables on-demand heating for each regional unit, reducing heating costs and increasing the revenue of heating companies while ensuring the user's heat load needs are met. Attached Figure Description

[0039] Figure 1 The flowchart of the multi-user centralized heating network temperature balance control and regulation method of the present invention is shown below.

[0040] Figure 2 This is a flowchart illustrating the adjustment of the thermal and hydraulic balance of the primary network in this embodiment;

[0041] Figure 3 This is a flowchart illustrating the adjustment of the thermal and hydraulic balance of the secondary network in this embodiment;

[0042] Figure 4 This is a flowchart illustrating the thermal and hydraulic balance adjustment of the user unit network in this embodiment;

[0043] Figure 5 This is a flowchart illustrating the temperature balance control and regulation of a multi-user centralized heating network in this embodiment. Detailed Implementation

[0044] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0046] To address the aforementioned problems, this invention aims to provide a method for temperature balance control and regulation of multi-user centralized heating networks, solving issues such as difficulties in thermo-hydraulic balance regulation, high heating energy consumption, and enormous workload in large centralized heating networks.

[0047] To achieve the above objectives, the present invention adopts the following technical solution:

[0048] A method for temperature balance control and regulation of a multi-user centralized heating network consists of five steps, including...

[0049] like Figure 1 As shown, step 1: Hydraulic balance adjustment of the primary network is carried out. The heat load is predicted by actual indoor and outdoor temperatures and historical operating data. The valve opening is controlled to adjust the deviation between the actual circulation flow and the design flow.

[0050] Step 2: Based on the determined circulation flow rate, calculate and predict the return water temperature of the load, and first perform thermal and hydraulic balance adjustment on the primary network;

[0051] Step 3: Based on the initial balance of the primary network, perform thermal and hydraulic balance adjustments on the secondary network;

[0052] Step 4: Based on the initial balance of the secondary network, perform thermal and hydraulic balance adjustments on each user unit;

[0053] Step 5: Repeat steps 2, 3, and 4 to bring the entire heating network into a state of thermal-hydraulic balance.

[0054] First, based on the real-time operating data such as the primary network circulation flow, supply and return water temperature, and outdoor temperature obtained from the centralized control platform, the predicted heat load is determined according to historical operating data. The opening of the electric regulating valves of the primary network, secondary network, and unit users is adjusted to the maximum. Then, the primary network return water temperature under the predicted load is calculated using the primary network return water temperature adjustment formula. The opening of the primary network electric regulating valve is adjusted according to the difference between the actual return water temperature and the calculated return water temperature until the difference between the actual return water temperature and the calculated return water temperature is within a reasonable range, and the opening of the primary network electric regulating valve remains unchanged.

[0055] Acquire real-time operating data such as secondary network circulation flow, supply and return water temperature, and outdoor temperature. Determine the heat load based on the historical operating data of the secondary network. Calculate the secondary network return water temperature under the predicted load using the return water temperature adjustment formula. Guide the adjustment of the opening of the secondary network electric regulating valve based on the difference between the actual return water temperature and the calculated return water temperature. Keep the valve opening unchanged once the difference is within a reasonable range.

[0056] Obtain the supply and return water temperatures and circulation flow rates of each end user unit, and adjust the electric regulating valves of each unit branch one by one to ensure that the difference between the return water temperature of each unit and the calculated return water temperature is within a reasonable range. Then repeat the adjustment work from the primary network to the user unit to complete the overall temperature balance.

[0057] This invention provides a method for temperature balance control and regulation of centralized heating networks for multiple users. The method divides the operation and regulation of the heating network into five steps, each with a clear objective. First, the thermal and hydraulic balance of the primary network is regulated. Then, the hydraulic and thermal balance of the secondary network and user units are regulated sequentially. This method enables the highly coupled and lagging heating network to quickly achieve the temperature balance target, significantly improving the efficiency of heating network regulation. Combined with load forecasting, it can quickly and accurately respond to changes in outdoor weather, improve the overall coordination and scheduling capability of the heating system, avoid waste of heat and electricity, achieve on-demand heating, reduce heating costs, and increase the profit margin of heating companies while ensuring the heat load demand of users.

[0058] Example 1: The multi-user centralized heating network temperature balance control and regulation method provided by the present invention, such as... Figure 5 As shown, it includes the following steps:

[0059] like Figure 2 As shown, step 1: Hydraulic balance adjustment is performed on the primary network. The heat load is predicted using actual indoor and outdoor temperatures and historical operating data. The valve opening is controlled to adjust the deviation between the actual circulating flow rate and the design flow rate. The predicted heat load mainly varies with the outdoor temperature, and its calculation formula is as follows:

[0060]

[0061] In the formula: Q' is the predicted heat load, Q is the heat load corresponding to the design outdoor temperature in historical data, and tn The specified temperature for indoor heating is generally 18℃. w For the outdoor design temperature for heating, t′ w This represents the actual outdoor temperature.

[0062] The regulating valve controls the flow ratio of the main network. The formula for calculating the flow ratio is:

[0063]

[0064] In the formula: G1′ is the ratio of the actual circulating network traffic to the preset network traffic, where G1′ is the actual network traffic and G1 is the preset network traffic.

[0065] The adjustment relationship follows the basic formula for heating load regulation:

[0066]

[0067] Δt1′=t′g1-t′ h1

[0068]

[0069]

[0070] In the formula: This represents the ratio of the actual heat output of the network to the preset heat output of the network. This represents the ratio of actual network traffic to the preset network traffic. y is the ratio of the actual primary return water temperature to the preset primary return water temperature. h1 The target value for regulating the return water temperature of the primary network is calculated, where b1 is the coefficient of the primary network heat dissipation equipment, and t′ is the value of the target value. g1 t′ represents the actual water supply temperature of the central network. h1 Δt1′ represents the actual return water temperature of the primary network, and Δt1′ represents the difference between the actual return water temperature and the target return water temperature; m is taken as 1 / 3, t n To specify the indoor temperature for heating, t w The preset outdoor temperature for heating, t′ w Δt1′ represents the actual outdoor temperature, and Δt1′ represents the temperature difference between the actual water supply temperature and the actual water return temperature of the primary water network.

[0071] Step 2: Based on the determined circulating flow rate, calculate the predicted load return water temperature and first perform thermal and hydraulic balance adjustment on the primary network. The return water temperature adjustment is based on the formula:

[0072] Δt1′=t′ g1 -t′ h1

[0073] In the formula: t′ g1t′ represents the actual water supply temperature of the central network. h1 To determine the actual return water temperature of the primary network, the calculated return water temperature corresponding to the predicted load is calculated based on the monitored supply water temperature and the above formula. The valve opening is adjusted to bring the actual return water temperature close to the calculated return water temperature. If the actual return water temperature is higher than the calculated return water temperature, the electric regulating valve of the primary network is closed; otherwise, the regulating valve is opened until the difference between the actual return water temperature and the calculated return water temperature is within 0.5℃. The valve opening is then kept constant to proceed to the next step.

[0074] like Figure 3 As shown, step 3: Based on the initial balance of the primary network, the secondary network is adjusted for thermal and hydraulic balance. The formula for adjusting the return water temperature of the secondary network is:

[0075]

[0076]

[0077] Δt2′=t′ g2 -t′ h2

[0078]

[0079] In the formula: t h2 The target value for regulating the return water temperature of the secondary network is t′. g2 t′ represents the actual secondary water supply temperature. h2 β represents the actual return water temperature of the secondary network, and β is the coefficient of the secondary network heat dissipation equipment; it is related to the equipment itself; t w For the outdoor design temperature for heating, t′ w This is the actual outdoor temperature. G2′ represents the flow ratio between the actual secondary circulation flow rate and the preset secondary circulation flow rate, where G2′ is the actual secondary circulation flow rate and G2 is the preset secondary circulation flow rate; Δt2′ represents the temperature difference between the actual secondary circulation water supply temperature and the actual secondary circulation water return temperature.

[0080] Acquire real-time operating data such as secondary network circulation flow, supply and return water temperature, and outdoor temperature. Determine the heat load based on historical operating data of the secondary network. Based on the determined circulation flow, use the indoor temperature monitored by room temperature measuring points and calculate the target value of the secondary network return water temperature according to the formula. Adjust the opening of the electric regulating valve according to the difference between the calculated and actual return water temperatures. If the actual return water temperature is higher than the calculated return water temperature, close the regulating valve opening; otherwise, open it wider. Continue until the difference between the actual and calculated return water temperatures is within 0.5℃, then keep the valve opening unchanged and proceed to the next step.

[0081] like Figure 4 As shown, step 4: Based on the initial balance of the secondary network, perform thermal and hydraulic balance adjustments on each user unit individually. The terminal adjustment method follows the basic formula for mass-flow optimization adjustment:

[0082]

[0083]

[0084]

[0085]

[0086] Δt3′=t′ g3 -t′ h3

[0087] In the formula: t g3 The target value for adjusting the water supply temperature to the user unit, t h3 The target value for adjusting the return water temperature of the user unit is t′. g3 t′ represents the actual water supply temperature of the user unit. h3 b2 represents the actual return water temperature of the user unit, and b2 represents the heat dissipation coefficient of the user unit, which is related to the user terminal equipment itself; t w For the outdoor design temperature for heating, t′ w The actual outdoor temperature is given, and m is taken as 1 / 3. This is the heat ratio between the actual heat generated by each user unit and the preset heat generated by each user unit. This is the ratio of the actual return water temperature of the user unit to the preset return water temperature of the user unit. G3′ is the flow ratio between the actual circulating user unit flow rate and the preset user unit flow rate, where G3 is the actual user unit flow rate and G3 is the preset user unit flow rate; Δt3′ is the temperature difference between the actual user unit supply water temperature and the actual user unit return water temperature.

[0088] Changing the supply and return water temperatures of each user unit can be achieved by adjusting the opening of the unit's electric regulating valve.

[0089] Step 5: Repeat steps 2, 3, and 4 to achieve a more precise thermo-hydraulic balance in the entire heating network.

[0090] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0091] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A method for temperature balance control and regulation of a multi-user centralized heating network, characterized in that, include, Step 1: Based on the predicted heat load using actual indoor and outdoor temperatures and historical operating data, control the valve opening to adjust the deviation between the actual primary circulation network flow rate and the preset primary circulation network flow rate, and perform hydraulic balance adjustment of the primary network. Step 2: Based on the determined flow rate of the primary circulating network, calculate the return water temperature of the primary network to predict the heat load, and adjust the primary network for thermal and hydraulic balance. Step 3: Based on the initial thermal and hydraulic balance of the primary network, adjust the thermal and hydraulic balance of the secondary network; Step 4: Based on the initial thermal and hydraulic balance of the secondary network, adjust the thermal and hydraulic balance of each user unit; Step 5: Repeat steps 2, 3, and 4 to bring the entire heating network into a state of thermal-hydraulic balance.

2. The method for temperature balance control and regulation of a multi-user centralized heating network according to claim 1, characterized in that, The specific process of hydraulic balance adjustment of the primary network in step 1 is as follows: Based on the real-time primary network circulation flow, supply and return water temperature, and indoor and outdoor temperature obtained from the centralized control platform, and based on historical operating data to determine the predicted heat load, the opening of the electric regulating valves of the primary network, secondary network, and each unit user is adjusted to the maximum. Based on the deviation between the actual circulation flow of the primary network and the preset primary network flow, the primary network is hydraulically balanced.

3. The method for temperature balance control and regulation of a multi-user centralized heating network according to claim 2, characterized in that, The formula for calculating the predicted heat load is as follows: In the formula: To predict heat load, The heat load is the preset outdoor temperature based on historical data. To set a specified temperature for indoor heating, Preset outdoor temperature for heating, This represents the actual outdoor temperature.

4. The method for temperature balance control and regulation of a multi-user centralized heating network according to claim 3, characterized in that, The formula for calculating the deviation between the actual circulating primary network traffic and the preset primary network traffic is as follows: In the formula: This is the ratio of actual circulating primary network traffic to preset primary network traffic. Actual primary network traffic, Preset the primary network traffic.

5. The method for temperature balance control and regulation of a multi-user centralized heating network according to claim 4, characterized in that, The control valves regulate the thermal and hydraulic balance of the primary heating network according to the basic formula for heating load regulation: ； ； ； ； In the formula: This represents the ratio of the actual heat output of the primary network to the preset heat output of the primary network. This is the ratio of actual primary network traffic to preset primary network traffic. This is the ratio of the actual primary network return water temperature to the preset primary network return water temperature. b1 represents the target value for adjusting the return water temperature of the primary network, where b1 is the coefficient of the primary network heat dissipation equipment. This refers to the actual water supply temperature of the primary water network. This refers to the actual primary network return water temperature. This is the difference between the actual primary network return water temperature and the target value for return water temperature adjustment. m is 1 / 3. To set a specified temperature for indoor heating, Preset outdoor temperature for heating, This refers to the actual outdoor temperature. This represents the temperature difference between the actual primary network supply water temperature and the actual primary network return water temperature.

6. The method for temperature balance control and regulation of a multi-user centralized heating network according to claim 5, characterized in that, The specific process of thermal and hydraulic balance regulation of the primary network is as follows: Based on the actual primary network supply water temperature obtained from monitoring and the calculated return water temperature of the predicted heat load, the opening of the primary network valve is adjusted to bring the actual primary network return water temperature close to the primary network return water temperature of the predicted heat load. If the actual primary network return water temperature is higher than the calculated return water temperature of the predicted heat load, the primary network electric regulating valve is closed; conversely, the primary network electric regulating valve is opened, until the difference between the actual primary network return water temperature and the calculated return water temperature of the predicted heat load is less than 0.5℃. The opening of the primary network electric regulating valve is kept unchanged, thereby achieving thermal and hydraulic balance regulation of the primary network.

7. The method for temperature balance control and regulation of a multi-user centralized heating network according to claim 1, characterized in that, The formula used for thermal and hydraulic balance regulation in secondary networks is: ； In the formula: The target value for adjusting the return water temperature in the secondary network. This refers to the actual water supply temperature of the secondary network. This refers to the actual return water temperature of the secondary network. This refers to the heat dissipation coefficient of the secondary network equipment; it is related to the equipment itself. For the outdoor design temperature of heating, This represents the actual outdoor temperature. This is the ratio of the actual circulating secondary network traffic to the preset secondary network traffic.

8. The method for temperature balance control and regulation of a multi-user centralized heating network according to claim 7, characterized in that, The specific process of thermal and hydraulic balance regulation of the secondary network is as follows: Using the indoor temperature monitored by the room temperature measuring point and the target value of the secondary network return water temperature calculated according to the formula, the opening of the electric regulating valve is adjusted according to the difference between the calculated target value and the actual secondary network return water temperature. If the actual secondary network return water temperature is higher than the target value, the opening of the electric regulating valve is reduced, and vice versa, until the difference between the actual secondary network return water temperature and the target value is less than 0.5℃, and the opening of the electric regulating valve is kept unchanged.

9. The method for temperature balance control and regulation of a multi-user centralized heating network according to claim 1, characterized in that, The thermal and hydraulic balance regulation methods of each user unit follow the basic formula of mass-flow optimization regulation: In the formula: Set the target value for the water supply temperature of the user unit. The target value for adjusting the return water temperature of the user unit. The actual water supply temperature for the user unit. This refers to the actual return water temperature of the user unit. The heat dissipation coefficient of the user unit is related to the user terminal equipment itself; For the outdoor design temperature of heating, The actual outdoor temperature is given, and m is taken as 1 / 3. This is the heat ratio between the actual heat generated by each user unit and the preset heat generated by each user unit.

10. A method for temperature balance control and regulation of a multi-user centralized heating network according to claim 9, characterized in that, The specific process of thermal and hydraulic balance adjustment for each user unit is as follows: Obtain the supply and return water temperatures and circulation flow rates of each end user unit, and adjust the electric regulating valves of each unit branch one by one to ensure that the difference between the return water temperature of each unit and the calculated return water temperature is within a reasonable range. Then repeat the adjustment work from the primary network, secondary network to user units, and so on, to complete the overall temperature balance.

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