A multi-unit heat pump linkage control method and system

Abstract

The present invention relates to the field of thermal energy technology, and discloses a multi-unit heat pump linkage control method and system. First, the load conditions of the first energy supply area and the second functional area are obtained, and the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area are obtained. The energy supply cost per unit area of ​​the first energy supply area and the second functional area is calculated according to the energy supply cost per unit area of ​​the first energy supply area and the second functional area. Finally, according to the energy supply cost per unit area of ​​the first energy supply area and the second functional area, a linkage energy supply strategy is set, and the energy supply area with a small energy supply cost per unit area provides linkage energy supply for the energy supply area with a high energy supply cost per unit area. The energy supply linkage control of adjacent energy supply areas is realized, and energy supply complementarity is achieved according to the load requirements of different areas, which solves the technical problem of energy waste caused by starting energy supply of multiple units in multiple areas at the same time.

Description

Technical Field

[0001] The present application relates to the field of heating technology, and in particular to a multi-unit heat pump linkage control method and system. Background Art

[0002] At present, the main forms of urban heating include cogeneration, industrial waste heat, centralized boiler rooms and decentralized small boiler rooms. In addition, newly added thermal power plants and large coal-fired boiler rooms have brought about environmental pollution problems. With the accelerated development of cities and the improvement of residents' living standards, urban buildings are increasing, and centralized heating networks are needed to meet the heating needs of more buildings. However, for large-area heating, a simple centralized heating method is not applicable. It is necessary to divide the energy supply area into multiple areas for separate energy supply. For example, multiple energy stations are set up, and each energy station is responsible for the energy supply needs of a certain area. In the existing technology, during the energy supply season, the energy supply equipment of multiple energy stations needs to be turned on at the same time, and the terminal load requirements of different energy supply areas are not the same. Some areas require high loads, and some areas require low loads. If the units of all energy stations are turned on and operated at the same time, unnecessary energy waste will occur. Summary of the invention

[0003] In view of this, the present application provides a multi-unit heat pump linkage control method and system, which realizes cross-regional energy supply linkage control, achieves energy supply complementarity according to the load requirements of different regions, and solves the technical problem of energy waste caused by simultaneous energy supply of multiple units across regions.

[0004] According to a first aspect of the present application, a multi-unit heat pump linkage control method is provided, comprising:

[0005] Obtaining load conditions of a first energy supply area and a second functional area, wherein the first energy supply area and the second functional area are adjacent in geographical location;

[0006] Obtaining energy supply costs and energy supply areas of the first energy supply area and the second functional area;

[0007] Calculating the energy supply costs per unit area of ​​the first energy supply area and the second functional area according to the energy supply costs and energy supply areas of the first energy supply area and the second functional area;

[0008] According to the energy supply costs per unit area of ​​the first energy supply area and the second functional area, a linkage energy supply strategy is set to provide linkage energy supply to the energy supply area with high energy supply cost per unit area through the energy supply area with low energy supply cost per unit area.

[0009] According to a second aspect of the present application, a multi-unit heat pump linkage control system is provided, comprising:

[0010] A first acquisition device is used to acquire load conditions of a first energy supply area and a second functional area, wherein the first energy supply area and the second functional area are adjacent in geographical location;

[0011] A second acquisition device, used to acquire the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area;

[0012] an energy supply calculation device, used to calculate the energy supply cost per unit area of ​​the first energy supply area and the second functional area according to the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area;

[0013] The function control device is used to set a linkage energy supply strategy according to the energy supply cost per unit area of ​​the first energy supply area and the second functional area, and provide linkage energy supply to the energy supply area with high energy supply cost per unit area through the energy supply area with low energy supply cost per unit area.

[0014] By means of the above technical scheme, the present application provides a method and system for controlling a multi-unit heat pump linkage. First, the load conditions of the first energy supply area and the second functional area are obtained, and the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area are obtained. The energy supply cost per unit area of ​​the first energy supply area and the second functional area is calculated according to the energy supply cost per unit area of ​​the first energy supply area and the second functional area. Finally, according to the energy supply cost per unit area of ​​the first energy supply area and the second functional area, a linkage energy supply strategy is set, and linkage energy supply is provided to the energy supply area with a high energy supply cost per unit area through the energy supply area with a low energy supply cost per unit area. The linkage control of energy supply of adjacent energy supply areas is realized, and energy supply complementarity is achieved according to the load requirements of different areas, which solves the technical problem of energy waste caused by starting energy supply of multiple units in multiple areas at the same time.

[0015] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and to implement it in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A schematic diagram showing an application scenario of a multi-unit heat pump linkage control method provided in an embodiment of the present application is shown;

[0018] Figure 2A schematic flow chart of a multi-unit heat pump linkage control method provided in an embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram of actual linkage control of a multi-unit heat pump provided in an embodiment of the present application is shown;

[0020] Figure 4 A schematic diagram of a relay pump switch control structure provided in an embodiment of the present application is shown;

[0021] Figure 5 A schematic structural diagram of a multi-unit heat pump linkage control system provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0022] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0023] A multi-unit heat pump linkage control method provided by an embodiment of the present invention can be applied to Figure 1 In a zoned heating environment, the zone is divided into a first energy supply area and a second energy supply area. The first energy supply area can be a certain area of ​​a large community, and energy is provided by a separate energy station. The second energy supply area can be another area, and energy is also provided by a separate energy station. The energy supply branches of the first energy supply area and the second energy supply area are located adjacent to each other in the figure, which are called adjacent branches. The adjacent branches can be used as control points for energy supply linkage control, and the multi-unit heat pump linkage control method of the embodiment of the present invention is executed. First, the load conditions of the first energy supply area and the second functional area are obtained, and the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area are obtained. According to the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area, the energy supply cost per unit area of ​​the first energy supply area and the second functional area is calculated. Finally, according to the energy supply cost per unit area of ​​the first energy supply area and the second functional area, a linkage energy supply strategy is set, and linkage energy is provided to the energy supply area with a high energy supply cost per unit area through the energy supply area with a small energy supply cost per unit area. The energy supply linkage control of adjacent energy supply areas is realized, and energy supply complementarity is achieved according to the load requirements of different areas, which solves the technical problem of energy waste caused by simultaneous energy supply of multiple units in multiple areas.

[0024] The present invention is described in detail below through specific embodiments.

[0025] In this embodiment, a multi-unit heat pump linkage control method is provided. Figure 2 As shown, the method includes:

[0026] Step 201, obtaining load conditions of the first energy supply area and the second functional area;

[0027] Among them, the first energy supply area and the second functional area are geographically adjacent; the first energy supply area and the second functional area are geographically adjacent specifically means that the energy supply branch of the first energy supply area and the energy supply branch of the second energy supply area are geographically adjacent within a certain section.

[0028] Step 202: Obtain the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area;

[0029] Among them, the power supply charges of each part of the power supply branch of the first power supply area and the second functional area, the network capacity loss on the power supply branch and the operating charges of the unit motor are obtained. For example: the cost of the power supply area is mainly the electricity charge of the power supply, the network capacity loss, and the basic electricity charge of the motor (as long as the power is on, even if it is not used, it must be paid). The second and third items are less apportioned if the area is large, and more apportioned if the area is small. For example: the 4# station has a small area and a high apportionment cost of 49.24 yuan / ㎡, while the 2# station has a large area and only 28.78 yuan / ㎡.

[0030] Step 203: Calculate the energy supply cost per unit area of ​​the first energy supply area and the second functional area according to the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area;

[0031] Step 204: according to the energy supply costs per unit area of ​​the first energy supply area and the second functional area, a linkage energy supply strategy is set, and linkage energy supply is provided to the energy supply area with high energy supply cost per unit area through the energy supply area with low energy supply cost per unit area.

[0032] Among them, when the energy supply cost per unit area of ​​the first energy supply area is greater than the energy supply cost per unit area of ​​the second energy supply area, a linkage switch is set on the adjacent energy supply branches of the first energy supply area and the second energy supply area to connect the energy supply branch of the first energy supply area with the energy supply branch of the second energy supply area, and stop supplying power to the heat pump unit in the first energy supply area.

[0033] Optionally, when the energy supply cost per unit area of ​​the first energy supply area is greater than the energy supply cost per unit area of ​​the second energy supply area, it is also necessary to determine whether the energy supply load of the first energy supply area is less than a preset threshold value. When the energy supply load of the first energy supply area is less than the preset threshold value, the energy supply branch of the first energy supply area is connected with the energy supply branch of the second energy supply area, and the power supply of the heat pump unit in the first energy supply area is stopped. When the energy supply load of the first energy supply area is greater than the preset threshold value, the energy supply branch of the first energy supply area is connected with the energy supply branch of the second energy supply area, and the power supply of some heat pump units in the first energy supply area is stopped.

[0034] In addition, in this embodiment, the first energy supply area and the second functional area can be multiple energy supply situations. Specifically, in the actual energy supply situation, a dual backup heat source energy supply design can be realized. For example, during the cooling season, the river water source heat pump unit is often shut down due to river flooding. Since the load on the secondary side of the terminal is small during the cooling season, the available sewage heat source can be switched in time. This technology can solve this problem. By optimizing the startup mode and starting the energy station with a higher energy efficiency host, the production energy cost can be saved. When the load of one host of one energy station can meet the energy demand, the other energy station does not need to start the equipment, thereby saving basic electricity costs.

[0035] The embodiment of the present invention provides a method for controlling a multi-unit heat pump linkage. First, the load conditions of the first energy supply area and the second functional area are obtained, and the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area are obtained. The energy supply cost per unit area of ​​the first energy supply area and the second functional area is calculated according to the energy supply cost per unit area of ​​the first energy supply area and the second functional area. Finally, according to the energy supply cost per unit area of ​​the first energy supply area and the second functional area, a linkage energy supply strategy is set, and linkage energy supply is provided to the energy supply area with a high energy supply cost per unit area through the energy supply area with a low energy supply cost per unit area. The linkage control of energy supply of adjacent energy supply areas is realized, and energy supply complementarity is achieved according to the load requirements of different areas, which solves the technical problem of energy waste caused by starting energy supply of multiple units in multiple areas at the same time.

[0036] In order to make the embodiment of the present invention closer to the actual application scenario, Figure 3 As shown, the D-zone branch of the first energy supply area (corresponding to the No. 2 energy station) supplies energy to the D12 heat exchange station, which is adjacent to the D13 heat exchange station of the energy supply area of ​​the second functional area (corresponding to the No. 4 energy station). The primary pipe network can be connected by a pipe with a diameter of DN350. The D13 heat exchange station is equipped with a relay pump that connects the two energy stations. By switching the valve and changing the direction of the water flow, the connection operation can be realized. The water pump is reused, the water pump flow is 257m³ / h, and the head is 43 meters. According to the actual operation data of the cooling season, the temperature difference of the primary pipe network of the heat exchange station is 5℃, and the maximum energy supply can be calculated to be 1494kWh. Then, when the terminal load is less than 1494kWh, the connection operation can be selected.

[0037] At the adjacent energy supply branch, a relay pump is installed, such as Figure 4 As shown, two groups of four valves (valve 410, valve 420, valve 430, valve 440) are designed before and after the relay pump, and the valves are controlled accordingly. For example, if energy station No. 2 (second energy supply area) is selected for energy supply, valves 410 and 440 are opened, and valves 420 and 430 are closed; if energy station No. 4 (first energy supply area) is selected for energy supply, valves 420 and 430 are opened, and valves 410 and 440 are closed.

[0038] This linkage control device can be arranged on the secondary side, and can be combined with manual control and automatic control. Collect the internal and external environmental information of the building served by the water source heat pump system; analyze and compare the collected information, and combine the basic meteorological data of China's five major climate zones and the standard energy consumption data of cold and hot buildings of various functional buildings to form a cold and hot load prediction model for the energy supply area; comprehensively consider the differences in building functions, energy consumption time and load distribution, generate the cold and hot load prediction model for the energy supply area, and the dynamic curve of cold and hot energy demand, and realize the automatic operation of linkage control through the prediction model.

[0039] Since linkage control is required in adjacent energy supply areas (to avoid excessive length of the secondary energy supply loop, resulting in energy loss and cost increase), it is necessary to optimize the calculation of the secondary energy supply loop distance of the energy supply area. In the embodiment of the present invention, a dynamic linkage control function strategy for multiple areas can be implemented through a graph optimization algorithm.

[0040] After applying the method of the embodiment of the present invention, after the two different functional areas are linked and controlled, when the low-load 2# station can meet the needs, the 2# station with higher efficiency and lower energy unit price can be selected to operate, supplying both 2# station and 4# station, thereby achieving the goal of meeting energy supply needs and reducing energy costs. Automatic switching can be achieved, as long as the valve is an electric door, the electric door and the motor are connected to the existing control system and a predetermined program is compiled.

[0041] A multi-unit heat pump linkage control provided by an embodiment of the present invention has achieved huge benefits in the actual application of the project. In the 2021 heating season, the actual supply area of ​​Energy Station No. 2 was 554,600 square meters, with a unit cost of 28.78 yuan / square meter. The actual supply area of ​​Energy Station No. 6 was 64,900 square meters. The energy supply is mainly for residents, and only heating is provided but not cooling. The heat source used is natural gas, with a unit cost of 49.24 yuan / square meter. The F branch of Energy Station No. 2 is adjacent to Energy Station No. 6. When the outdoor ambient temperature is higher than 2°C, a maximum of 5 main machines will be in operation, and 3 main machines will be in standby status. If this operating mode is promoted, it will make full use of the energy supply of equipment with high energy efficiency ratio and low energy unit price, further saving energy costs.

[0042] The embodiment of the present invention also provides a multi-unit heat pump linkage control system, such as Figure 5 As shown, including:

[0043] The first acquisition device 510 is used to acquire load conditions of a first energy supply area and a second functional area, wherein the first energy supply area and the second functional area are adjacent in geographical location;

[0044] The second acquisition device 520 is used to acquire the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area;

[0045] The energy supply calculation device 530 is used to calculate the energy supply cost per unit area of ​​the first energy supply area and the second functional area according to the energy supply cost and energy supply area of ​​the first energy supply area and the second functional area;

[0046] The function control device 540 is used to set a linkage energy supply strategy according to the energy supply costs per unit area of ​​the first energy supply area and the second functional area, and provide linkage energy supply to the energy supply area with high energy supply cost per unit area through the energy supply area with low energy supply cost per unit area.

[0047] The function control device 540 includes:

[0048] A determination module 541, used to determine whether the energy supply cost per unit area of ​​the first energy supply area is greater than the energy supply cost per unit area of ​​the second energy supply area;

[0049] The execution module 542 is used to control the interlocking switches on the adjacent energy supply branches of the first energy supply area and the second energy supply area, connect the energy supply branch of the first energy supply area with the energy supply branch of the second energy supply area, and control the stopping of power supply of the heat pump unit in the first energy supply area when the judgment module determines that the energy supply cost per unit area of ​​the first energy supply area is greater than the energy supply cost per unit area of ​​the second energy supply area.

[0050] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0051] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A multi-unit heat pump linkage control method, characterized in that: include: Obtaining load conditions of a first energy supply area and a second energy supply area, wherein the first energy supply area and the second energy supply area are geographically adjacent, wherein the first energy supply area and the second energy supply area are geographically adjacent specifically means that an energy supply branch of the first energy supply area and an energy supply branch of the second energy supply area are geographically adjacent in a certain section; Obtaining the power supply charges of each part of the equipment on the energy supply branches in the first energy supply area and the second energy supply area, the capacity loss of the pipeline network on the energy supply branches, and the operating charges of the unit motors; Calculating the energy supply costs per unit area of ​​the first energy supply area and the second energy supply area according to the energy supply costs and energy supply areas of the first energy supply area and the second energy supply area; When the energy supply cost per unit area of ​​the first energy supply area is greater than the energy supply cost per unit area of ​​the second energy supply area, a linkage switch is set on the adjacent energy supply branches of the first energy supply area and the second energy supply area to connect the energy supply branch of the first energy supply area with the energy supply branch of the second energy supply area, and stop supplying power to the heat pump unit in the first energy supply area.

2. The method according to claim 1, characterized in that When the energy supply cost per unit area of ​​the first energy supply area is greater than the energy supply cost per unit area of ​​the second energy supply area, it is also necessary to determine whether the energy supply load of the first energy supply area is less than a preset threshold. When the energy supply load of the first energy supply area is less than the preset threshold, the energy supply branch of the first energy supply area is connected with the energy supply branch of the second energy supply area, and the power supply of the heat pump unit in the first energy supply area is stopped.

3. The method according to claim 2, characterized in that When the energy supply load of the first energy supply area is greater than a preset threshold, the energy supply branch of the first energy supply area is connected with the energy supply branch of the second energy supply area, and the power supply of some heat pump units in the first energy supply area is stopped.

4. A multi-unit heat pump linkage control system, which is used in the multi-unit heat pump linkage control method according to any one of claims 1 to 3, characterized in that: include: A first acquisition device is used to acquire load conditions of a first energy supply area and a second energy supply area, wherein the first energy supply area and the second energy supply area are adjacent in geographical location; A second acquisition device, used to acquire the energy supply cost and energy supply area of ​​the first energy supply area and the second energy supply area; an energy supply calculation device, configured to calculate the energy supply cost per unit area of ​​the first energy supply area and the second energy supply area according to the energy supply cost and energy supply area of ​​the first energy supply area and the second energy supply area; The functional control device is used to set a linkage energy supply strategy according to the energy supply cost per unit area of ​​the first energy supply area and the second energy supply area, and provide linkage energy supply to the energy supply area with high energy supply cost per unit area through the energy supply area with low energy supply cost per unit area.

5. The system according to claim 4, characterized in that The function control device comprises: a determination module, configured to determine whether the energy supply cost per unit area of ​​the first energy supply area is greater than the energy supply cost per unit area of ​​the second energy supply area; an execution module, for controlling the interlocking switches on the adjacent energy supply branches of the first energy supply area and the second energy supply area, connecting the energy supply branch of the first energy supply area with the energy supply branch of the second energy supply area, and controlling the stopping of power supply to the heat pump unit of the first energy supply area when the judgment module determines that the energy supply cost per unit area of ​​the first energy supply area is greater than the energy supply cost per unit area of ​​the second energy supply area.

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