Integrated energy system heating combined control method, device and system and storage medium

Abstract

The invention relates to the technical field of heating control, discloses a heating combined control method, device and system for a comprehensive energy system and a storage medium, and aims to solve the problems of frequent start and stop of a heat pump and frequent switching between the heat pump and a boiler in a traditional heating combined control method. The heating combined control method for the comprehensive energy system comprises the steps that the electricity price, the natural gas price and multiple operation condition parameters at the current time period are obtained, and the multiple operation condition parameters at least comprise the current environment temperature; according to the electricity price and the natural gas price in the current time period, a cost balance point for preparing unit heat between the heat pump and the boiler is determined, and a balance point COP value corresponding to the heat pump is obtained; a target heat pump working condition interval is determined in a preset heat pump performance monitoring table according to the multiple operation working condition parameters, and a target optimal COP value corresponding to the target heat pump working condition interval is obtained; and performing heating control on the integrated energy system based on the current environment temperature, the target optimal COP value, the balance point COP value and a preset target heating control strategy table.

Description

Technical Field

[0001] This application relates to the field of heating control technology, and in particular to a method, device, system and storage medium for integrated energy system heating joint control. Background Technology

[0002] New energy technologies, represented by heat pumps, are gradually becoming the focus of attention, and are widely used in indoor heating due to their advantages of being clean, comfortable, efficient, safe, and energy-saving. Indoor heating demand typically increases as ambient temperature decreases, while the heating output capacity of heat pumps tends to decrease with decreasing ambient temperature. Therefore, when the heating output capacity of heat pumps cannot meet heating needs at low ambient temperatures, supplementary heat source equipment such as boilers is often required. As the number and types of equipment increase, energy control becomes increasingly complex. Therefore, comprehensive management and scheduling of various equipment within a region through integrated energy systems is particularly important for improving energy utilization, reducing electricity costs, and enhancing user comfort.

[0003] Traditional integrated heating control methods typically involve the coordinated control of heat pumps and boilers based on electricity costs and heating demand. The electricity costs of each device are closely related to its heating efficiency; higher efficiency means lower costs. This is especially true for heat pumps, whose heating efficiency is highly dependent on factors such as ambient temperature and water temperature. Often, the heating efficiency can only be determined after the system has started, and each operation requires a period of time to reach a stable value. This means that the integrated energy system must first start the heat pump and run it for several minutes before determining the electricity costs of the heat pump and other heating equipment. Traditional integrated heating control methods easily lead to frequent start-stop cycles of the heat pump, reducing its lifespan. Furthermore, changes in heating efficiency cause frequent switching between the heat pump and other heating equipment, reducing system stability and reliability. Summary of the Invention

[0004] This application provides a method, device, system, and storage medium for integrated energy system heating and cooling joint control. It addresses the problem that traditional integrated energy system heating and cooling joint control methods often result in frequent start-ups and shutdowns of the heat pump, reducing its lifespan. Furthermore, the method can lead to frequent switching between the heat pump and other heating equipment due to changes in heating efficiency, thus reducing system stability and reliability.

[0005] The first aspect of this application provides a combined heating control method for an integrated energy system, which is applied to an integrated energy system, the integrated energy system including at least two heating devices: a heat pump and a boiler, including: acquiring the current electricity price, natural gas price and multiple operating condition parameters, the multiple operating condition parameters including at least the current ambient temperature;

[0006] Based on the current electricity price and the natural gas price, determine the cost balance point for generating unit heat between the heat pump and the boiler, and obtain the balance point COP value corresponding to the heat pump;

[0007] Based on the multiple operating condition parameters, the target heat pump operating condition range is determined in the preset heat pump performance monitoring table, and the target optimal COP value corresponding to the target heat pump operating condition range is obtained.

[0008] The integrated energy system is heated based on the current ambient temperature, the target optimal COP value, the equilibrium point COP value, and a preset target heating control strategy table.

[0009] A second aspect of this application provides a combined heating control device for an integrated energy system, applied to an integrated energy system, wherein the integrated energy system includes at least two types of heating equipment: a heat pump and a boiler. The combined heating control device for the integrated energy system includes:

[0010] The acquisition module is used to acquire the current electricity price, natural gas price, and multiple operating condition parameters, wherein the multiple operating condition parameters include at least the current ambient temperature;

[0011] The first determining module is used to determine the cost balance point for generating unit heat between the heat pump and the boiler based on the current electricity price and the natural gas price, and to obtain the balance point COP value corresponding to the heat pump.

[0012] The second determining module is used to determine the target heat pump operating condition range in a preset heat pump performance monitoring table based on the multiple operating condition parameters, and to obtain the target optimal COP value corresponding to the target heat pump operating condition range.

[0013] The heating control module is used to control the heating of the integrated energy system based on the current ambient temperature, the target optimal COP value, the equilibrium point COP value, and a preset target heating control strategy table.

[0014] A third aspect of this application provides an integrated energy system, comprising: a memory and at least one processor, wherein the memory stores instructions; the at least one processor invokes the instructions in the memory to cause the integrated energy system to execute the aforementioned integrated energy system heating joint control method.

[0015] A fourth aspect of this application provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the aforementioned integrated energy system heating joint control method.

[0016] The technical solution provided in this application determines the target optimal COP value of the heat pump under various operating conditions and the balance point COP value between the heat pump and the boiler at the current time period through a heat pump performance monitoring table. This allows for rapid comparison of the heating costs of the boiler and heat pump under various time periods and operating conditions, eliminating the need for frequent heat pump startups and avoiding frequent switching between the heat pump and the boiler. An efficient linkage mechanism is established through a target heating control strategy table, enabling flexible adjustment of heating control. This reduces overall heating costs while ensuring user comfort and improves the robustness, stability, and reliability of the system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first embodiment of the integrated energy system heating joint control method in this application;

[0018] Figure 2 This is a schematic diagram of the second embodiment of the integrated energy system heating joint control method in this application;

[0019] Figure 3 This is a schematic diagram of the third embodiment of the integrated energy system heating joint control method in this application.

[0020] Figure 4 This is a schematic diagram of one embodiment of the integrated energy system heating joint control device in this application;

[0021] Figure 5 This is a schematic diagram of another embodiment of the integrated energy system heating joint control device in this application;

[0022] Figure 6 This is a schematic diagram of one embodiment of the integrated energy system in this application. Detailed Implementation

[0023] This application provides a method, device, system, and storage medium for integrated energy system heating joint control, which solves the problems of frequent start-up and shutdown of heat pumps and frequent switching between heat pumps and boilers in traditional heating joint control methods.

[0024] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms “comprising” or “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] It is understood that the implementing entity of this application can be an integrated energy system, an integrated energy system heating and control device, or a terminal or server; the specific implementation is not limited here. This embodiment uses an integrated energy system as the implementing entity for illustration.

[0026] An integrated energy system includes at least two types of heating equipment: heat pumps and boilers. The heat pumps are powered by the power grid and / or other power generation equipment (such as photovoltaic equipment) and / or other energy storage equipment (such as energy storage batteries) to meet heating needs such as indoor heating and hot water supply; while the boilers meet indoor heating needs by burning natural gas.

[0027] In this application, the number of heat pumps and boilers can be one or more. That is, the integrated energy system can achieve coordinated heating control between a single heat pump and a boiler, or it can achieve coordinated heating control between multiple heat pumps and boilers. This application does not impose specific limitations. For scenarios with multiple heat pumps, a heat pump centralized control subsystem is typically used for coordinated scheduling of the multiple heat pumps. In other words, the integrated energy system acts as the host computer for the heat pump centralized control subsystem, and the subsystem performs balanced control of the multiple internal heat pumps according to the instructions from the host computer, such as controlling the number of heat pumps started and / or controlling the output load ratio of the started heat pumps (as described in the second embodiment below). For scenarios with a single heat pump, the integrated energy system acts as the host computer for that heat pump, and the heat pump performs start-stop and output load ratio control according to the instructions from the host computer. For ease of understanding, except for the second embodiment, the number of heat pumps and boilers in the integrated energy system is not specifically emphasized in the other embodiments below. Based on the technical concept provided in this application, appropriate adjustments can be made to apply to the above two scenarios.

[0028] Understandably, reducing heating costs for users requires calculating and comparing the real-time costs of boilers and heat pumps. However, natural gas prices are relatively stable, and the combustion heating efficiency of boilers is also basically fixed. When heat pumps are powered through the power grid, the grid electricity price fluctuates significantly, with a large difference between peak and off-peak electricity prices. Furthermore, the heating conversion efficiency of heat pumps is related to various operating parameters. Therefore, heat pumps often need to be started before real-time costs can be calculated, and it also takes time for the heat pump to adjust to a steady state. This results in frequent start-ups and shutdowns of the heat pump, as it requires running the heat pump for several minutes before comparing the electricity costs of boilers and heat pumps. To solve the above technical problems, this embodiment uses multiple operating parameters and heat pump performance monitoring tables to quickly determine the maximum COP that the heat pump can achieve under the current operating conditions. It also determines the cost balance point COP for the heat pump and boiler in terms of unit heat production based on the current electricity and natural gas prices, so as to quickly judge the level of electricity costs.

[0029] For ease of understanding, the specific process of this application is described below. Please refer to [link / reference]. Figure 1 One embodiment of the integrated energy system heating joint control method in this application includes:

[0030] 101. Obtain the current electricity price, natural gas price, and multiple operating condition parameters, including at least the current ambient temperature.

[0031] The current electricity price mentioned above is used to indicate the current electricity price standard of the distribution network. It is usually calculated in terms of the amount per kilowatt-hour or unit of electricity. The current electricity price can be obtained by communicating with the smart grid system. Depending on the actual situation, the duration of each electricity price period can be set to half an hour, one hour, two hours or other preset durations, without any specific restrictions.

[0032] The above natural gas prices indicate the current unit price of natural gas, usually per cubic meter. Natural gas prices can be obtained through communication with the online trading platform of natural gas suppliers, open market indices, or data interfaces of smart gas meters. Prices can also be set to be determined every half hour, hour, every two hours, or according to a specific schedule to accommodate different billing strategies.

[0033] The aforementioned operating condition parameters are used to indicate the current operating condition of the heat pump. These parameters may include various environmental parameters and heat pump operating parameters. Environmental parameters include current ambient temperature and current ambient humidity. Heat pump operating parameters include various operating temperatures and operating frequencies of various components, including but not limited to outlet water temperature, inlet water temperature, evaporation temperature, condensation temperature, and compressor frequency. The optimal COP of the heat pump under steady state is closely related to these multiple operating condition parameters.

[0034] 102. Determine the cost balance point for generating unit heat between the heat pump and the boiler based on the current electricity price and natural gas price, and obtain the corresponding balance point COP value for the heat pump.

[0035] In this embodiment, the equilibrium point COP value is used to indicate the energy conversion rate when the cost of the heat pump generating unit heat in the current time period is equal to the cost of the boiler generating unit heat.

[0036] To facilitate understanding, the derivation process of the equilibrium point COP value is as follows:

[0037] With a calorific value of 9 kWh / m³ for natural gas combustion 3 The price of natural gas is N yuan per cubic meter. The efficiency of the boiler is η. It produces 1 kWh of heat. Using the boiler requires (1 ÷ η ÷ 9) cubic meters of natural gas, which costs N × (1 ÷ η ÷ 9) yuan.

[0038] The heat pump provides heating via electricity supplied from the power grid. The current electricity price is E yuan per kilowatt-hour, and the heat pump's energy conversion efficiency is COP. s 1 kWh of electricity can produce (1 × COP) s To generate 1 kWh of heat using a heat pump, it takes (1 ÷ COP) kWh of heat. s For 1 kWh of electricity, the heat pump requires E × (1 ÷ COP). s )Yuan.

[0039] In the current period, if the heating cost of the boiler generating unit is equal to the heating cost of the heat pump generating unit, that is, N×(1÷η÷9)=E×(1÷COP) s COP s =1÷(N÷9÷η÷E)=9×η×E÷N. By obtaining the current electricity price, natural gas price, and boiler efficiency, the COP value of the heat pump for the current period can be quickly determined. Among them, the electricity price fluctuates greatly, and the COP value of the balance point for each period will also change accordingly.

[0040] It is understandable that if the COP value of the heat pump is greater than the equilibrium point COP value during the current period, the heating cost of the heat pump is less than the heating cost of the boiler; if the COP value of the heat pump is less than the equilibrium point COP value during the current period, the heating cost of the heat pump is greater than the heating cost of the boiler.

[0041] 103. Determine the target heat pump operating condition range in the preset heat pump performance monitoring table based on multiple operating condition parameters, and obtain the target optimal COP value corresponding to the target heat pump operating condition range.

[0042] Specifically, multiple operating condition parameters are matched with multiple initial heat pump operating condition intervals in the heat pump performance monitoring table. If each operating condition parameter is within the range of one of the initial heat pump operating condition intervals, then the initial heat pump operating condition interval is determined as the target heat pump operating condition interval, and the target optimal COP value corresponding to the target heat pump operating condition interval is obtained.

[0043] In this embodiment, the heat pump performance monitoring table includes multiple initial heat pump operating condition intervals and the optimal COP value corresponding to each initial heat pump operating condition interval. Each initial heat pump operating condition interval is a combination interval composed of multiple operating parameter intervals. The heat pump performance monitoring table in this embodiment records the point where the heat pump operates with the highest efficiency under each operating condition interval. The heat pump conversion efficiency is closely related to multiple current heat pump operating condition parameters. The more types of parameters selected for the operating condition intervals in the heat pump performance monitoring table, the more accurate the determined maximum conversion rate. This embodiment does not impose specific limitations on the types and number of parameters in the operating condition intervals divided in the heat pump performance monitoring table.

[0044] For example, the first heat pump operating condition range in the heat pump performance monitoring table consists of a first condensing temperature range and a first evaporating temperature range. The first heat pump operating condition range is the target operating condition range only when the condensing temperature is within the first condensing temperature range and the evaporating temperature is within the first evaporating temperature range. The optimal COP value corresponding to the first heat pump operating condition range is determined as the target optimal COP value.

[0045] This embodiment can directly obtain the maximum COP under the current operating condition by using the operating condition parameters, which is the maximum conversion rate that the heat pump can achieve under this condition. By reading the target optimal COP value, the frequency of heat pump start-up and shutdown caused by calculating the real-time COP of the heat pump is avoided, the time required for cost comparison is shortened, and the problem of frequent switching between heat pump and boiler caused by fluctuations in real-time COP is avoided, thus improving the stability of the system.

[0046] In this embodiment, the heat pump performance monitoring table can be calibrated by simulating various operating conditions through experiments to obtain the optimal COP; the heat pump performance monitoring table can also be a dynamically updated table based on operating data, that is, the optimal COP stored in the heat pump performance monitoring table is recorded and updated according to the actual operating conditions of the heat pump. The heat pump performance monitoring table can also be obtained in other ways, and this embodiment does not impose specific limitations.

[0047] Optionally, real-time operating data of the heat pump can be collected, and the heat pump performance monitoring table can be iteratively updated based on the real-time operating data of the heat pump.

[0048] The above-mentioned iterative update of the heat pump performance monitoring table based on real-time heat pump operation data includes: determining the real-time conversion efficiency based on the heat pump operation data; when the real-time conversion efficiency is greater than the optimal conversion rate recorded in the same heat pump operating condition range in the heat pump performance monitoring table, updating the optimal operation record in the same heat pump operating condition range in the heat pump performance monitoring table based on the real-time conversion efficiency and the actual parameter values ​​of each heat pump control parameter.

[0049] Multiple candidate heat pump operating condition intervals are selected from multiple initial heat pump operating condition intervals in the heat pump performance monitoring table based on multiple operating condition parameters. Each candidate heat pump operating condition interval corresponds to a compression frequency interval. The compression frequency intervals of any two candidate heat pump operating condition intervals do not overlap. The optimal COP value corresponding to each candidate heat pump operating condition interval increases as the upper limit frequency of the interval decreases.

[0050] Optionally, multiple candidate heat pump operating condition intervals are screened from multiple initial heat pump operating condition intervals using at least one target operating condition parameter; the target heat pump operating condition interval is determined from the multiple candidate heat pump operating condition intervals, and the target optimal COP value and target compressor frequency interval corresponding to the target heat pump operating condition interval are obtained.

[0051] This embodiment does not require starting the heat pump. The maximum COP that the heat pump can achieve under the current operating conditions can be directly determined through the table. Cost judgment can be made directly based on COPmax and the balance point COP. This avoids the need to start the heat pump and frequent switching of the heat pump.

[0052] In this embodiment, each candidate heat pump operating condition interval corresponds to a compression frequency interval. The compression frequency intervals of any two candidate heat pump operating condition intervals do not overlap. The optimal COP value corresponding to each candidate heat pump operating condition interval increases as the upper limit frequency of the interval decreases. For ease of understanding, an example of a heat pump performance monitoring table is provided.

[0053] In one feasible implementation, the optimal COP corresponding to each candidate heat pump operating condition interval is compared with the equilibrium point COP. If the optimal COP value corresponding to any candidate heat pump operating condition interval is greater than or equal to the equilibrium point COP, then that candidate heat pump operating condition interval is determined as a preferred heat pump operating condition interval, resulting in at least one preferred heat pump operating condition interval. A target heat pump operating condition interval is then determined from the at least one preferred heat pump operating condition interval, resulting in a target optimal COP value and a target compressor frequency range corresponding to the target heat pump operating condition interval. If the optimal COP value corresponding to each candidate heat pump operating condition interval is less than the equilibrium point COP, then a target heat pump operating condition interval is determined from the multiple candidate heat pump operating condition intervals, resulting in a target optimal COP value and a target compressor frequency range corresponding to the target heat pump operating condition interval.

[0054] Optionally, determining the target heat pump operating condition range within at least one preferred heat pump operating condition range, and obtaining the target optimal COP value and target compressor frequency range corresponding to the target heat pump operating condition range, includes: if there are at least two preferred heat pump operating condition ranges, then determining the preferred heat pump operating condition range with the smallest optimal COP as the target heat pump operating condition range, and obtaining the target optimal COP value and target compressor frequency range corresponding to the target heat pump operating condition range. This embodiment, by selecting the preferred heat pump operating condition range with the smallest optimal COP, can increase the upper limit of the heat pump compressor frequency, reducing the situation where the heat pump heating capacity under the current frequency limitation cannot meet user needs due to an excessively low upper limit, requiring the additional activation of auxiliary heating, thus maximizing the heat pump's heating capacity.

[0055] Optionally, determining the target heat pump operating condition range within at least one preferred heat pump operating condition range, and obtaining the target optimal COP value and target compressor frequency range corresponding to the target heat pump operating condition range, includes: if there are at least two preferred heat pump operating condition ranges, then determining the preferred heat pump operating condition range with the largest optimal COP as the target heat pump operating condition range, and obtaining the target optimal COP value and target compressor frequency range corresponding to the target heat pump operating condition range. This embodiment can improve the energy efficiency ratio of the heat pump in subsequent heating conversion by selecting the preferred heat pump operating condition range with the largest optimal COP.

[0056] In this embodiment, the target heat pump operating range is selected by the optimal COP and the equilibrium point COP, and the upper limit frequency of the target operating range is used as the limiting frequency when the heat pump executes the heating strategy.

[0057] In one feasible implementation, any one of the multiple candidate heat pump operating condition intervals is selected as the target heat pump operating condition interval, and the target optimal COP value and target compressor frequency interval corresponding to the target heat pump operating condition interval are obtained.

[0058] 104. Based on the current ambient temperature, the target optimal COP value, the equilibrium point COP value, and the preset target heating control strategy table, the integrated energy system is subjected to heating control.

[0059] In this embodiment, the target heating control strategy table includes multiple heating control intervals and heating control strategies corresponding to each heating control interval. Each heating control interval is a combination interval constructed from the ambient temperature range and the cost comparison results. The target heating control strategy table includes a variety of heating control strategies to flexibly adjust various heating conditions and achieve safe, efficient, energy-saving and low-carbon heating effects.

[0060] The above heating control strategy is used to indicate the type of heating equipment, and can also indicate the heating priority and / or heating sequence of the heating equipment, such as boiler heating only, heat pump heating only, boiler heating first followed by heat pump heating, heat pump heating first followed by boiler heating, boiler and heat pump heating simultaneously, etc.

[0061] Specifically, the target heating control strategy is determined in the preset target heating control strategy table based on the current ambient temperature, the target optimal COP value, and the equilibrium point COP value; the integrated energy system is then controlled to provide heating according to the target heating control strategy.

[0062] The target heating control strategy table indicates the heating table set according to the system configuration. Different system configurations store different target heating control strategy tables, which may include a pure boiler heating control strategy, multiple linked control strategies, or a pure heat pump heating control strategy. The pure boiler heating control strategy, by only starting the boiler for heating, can meet the user's heating needs in situations where the heat pump cannot start, is not allowed to start, or otherwise. The linked control strategy triggers the heating strategy according to the corresponding energy consumption mode command, prioritizing the start of the heat pump for heating, with the boiler providing auxiliary heating. The pure heat pump heating control strategy, by only starting the heat pump for heating, can achieve the goal of energy saving and carbon reduction when the heat pump's heating capacity meets the heating needs and its heating cost is lower than the boiler's cost.

[0063] In this embodiment, the target heating control strategy can be a pure boiler heating control strategy, a pure heat pump heating control strategy, or a linkage control strategy determined according to the energy consumption mode command.

[0064] In this embodiment, the target optimal COP value of the heat pump under various operating conditions and the balance point COP value between the heat pump and the boiler at the current time period are determined by the heat pump performance monitoring table. The heating cost of the boiler and heat pump under various time periods and operating conditions can be quickly compared. The target optimal COP value can be confirmed without starting the heat pump, avoiding the reduction in lifespan caused by frequent heat pump starts. The target heating control strategy can be confirmed directly without starting the heat pump and boiler, avoiding frequent switching between the heat pump and boiler. An efficient linkage mechanism is established through the target heating control strategy table to realize flexible adjustment of heating control. While reducing the overall heating cost, user comfort is taken into account, and the robustness, stability and reliability of the system are improved.

[0065] In practical applications, the integrated energy system heating joint control method provided in this application is suitable for scenarios involving the coordinated control of multiple heat pumps and other external energy control systems. Multiple heat pumps are typically managed and intelligently scheduled through a heat pump centralized control subsystem. In such scenarios, the integrated energy system usually limits the total output capacity of the heat pump centralized control subsystem. To balance the output limit with the need for rapid adjustment of the heat pumps to their optimal conversion rate, achieving balanced control of multiple heat pumps through the heat pump centralized control subsystem is crucial. Controlling based on the parameters of a single heat pump leads to increased complexity and computation, and also fails to achieve balanced coordination among multiple heat pumps. To solve the above technical problems, please refer to [link to relevant documentation]. Figure 2 The second embodiment of the integrated energy system heating joint control method in this application includes:

[0066] 201. Obtain the current electricity price, natural gas price, and multiple operating condition parameters, including at least the current ambient temperature.

[0067] 202. Determine the cost balance point for generating unit heat between the heat pump and the boiler based on the current electricity price and natural gas price, and obtain the corresponding balance point COP value for the heat pump.

[0068] Steps 201-202 can be performed by referring to steps 101 and 102, and will not be repeated here.

[0069] 203. Based on multiple operating condition parameters, determine the maximum conversion rate of each heat pump under the current operating condition in the heat pump performance monitoring table corresponding to each heat pump.

[0070] It is understandable that the calibrated optimal COP under various operating conditions recorded in the heat pump performance monitoring table when the heat pump is configured at the factory may change due to various factors such as the installation environment and user habits. The above-mentioned iterative update steps of the heat pump performance monitoring table can be carried out at any stage of each heat pump operation cycle. By iterating the optimal operation record through actual operation data, the adaptability of the heat pump performance monitoring table to the actual operating state of the heat pump can be improved. As the heat pump operation time is extended, the optimal COP under various operating conditions recorded in the heat pump performance monitoring table will be more accurate, realizing the self-adaptation of the heat pump performance monitoring table for each heat pump.

[0071] Based on multiple operating condition parameters, the maximum conversion rate of each heat pump under the current operating condition is determined in the preset heat pump performance monitoring table. Since the operating conditions are the same, although the optimal COP recorded in the heat pump performance monitoring table for each heat pump may deviate to a certain extent as the usage time increases, the performance of multiple heat pumps in the heat pump control subsystem is normally distributed.

[0072] 204. Determine the reference value of the central control conversion rate based on the maximum conversion rate corresponding to multiple heat pumps, and obtain the target operating frequency range corresponding to the reference value of the central control conversion rate.

[0073] It can be understood that the median, average, mode, etc. among multiple historical maximum conversion efficiencies can be selected as the reference value for centralized control conversion rate. Alternatively, the maximum conversion rate with representative significance can be selected from multiple historical maximum conversion rates based on other screening conditions. This embodiment does not impose specific restrictions.

[0074] Optionally, the median of the maximum conversion rate is determined based on the maximum conversion rates of multiple heat pumps, and the median of the maximum conversion rate is determined as the reference value for the centralized control conversion rate; the target operating frequency range is determined in the heat pump performance monitoring table based on the reference value for the centralized control conversion rate.

[0075] This embodiment uses the median as a reference value, which simplifies calculations and effectively represents the optimal efficiency point of most heat pumps in the current heat pump control subsystem. By using the median of the maximum conversion rate, the total energy consumption and output of the system can be better matched to actual needs when adjusting the number of heat pumps in operation. This avoids the potential loss of overall efficiency due to simply pursuing the best efficiency of individual heat pumps. This helps to optimize energy utilization while meeting the demand for heat supply.

[0076] 205. Determine the target heating control strategy based on the current ambient temperature, the reference value of the centralized control conversion rate, and the balance point COP value in the preset target heating control strategy table.

[0077] This embodiment uses the target heating control strategy of the integrated energy system, which also includes photovoltaic equipment, as an example. In this case, the heat pump is powered only by the mains power.

[0078] Optionally, if the current ambient temperature falls within any heat pump shutdown operating range, the pure boiler heating control strategy is determined as the target heating control strategy; if the current ambient temperature, target optimal COP value, and equilibrium point COP value fall within any heat pump priority operating range, the pure heat pump heating control strategy is determined as the target heating control strategy; if the current ambient temperature, target optimal COP value, and equilibrium point COP value fall within any command-driven operating range, the target energy consumption mode command corresponding to the current heat pump is obtained, and the target heating control strategy is determined based on the target optimal COP value, equilibrium point COP value, and target energy consumption mode command. The aforementioned target optimal COP value is a reference value for the centralized control conversion rate.

[0079] The median maximum conversion rate of multiple heat pumps is used as the reference value for the heat pump central control subsystem, i.e., the target optimal COP value is the central control conversion rate reference value, i.e., COPmid, to simplify the calculation required to determine the target heating strategy. The equilibrium point COP value is represented as COPs. The target heating control strategy is shown in Table 1 below:

[0080]

[0081]

[0082] In Tables 1 and 2 above, -T e_sc T represents the critical safety temperature of the heat pump, which is the minimum ambient temperature at which the heat pump can operate safely. e_osc This is the over-critical temperature of the heat pump. If the ambient temperature is higher than this value, the heat pump can independently meet the user's heating needs.

[0083] Understandably, in practical applications, if the ambient temperature is too low, the evaporation pressure will exceed the compressor's safe operating range. Starting the heat pump under these conditions would pose an operational risk. If the current ambient temperature is less than or equal to the preset heat pump safety critical temperature, the heat pump is not allowed to start. Specifically, if the current ambient temperature is less than or equal to the preset heat pump safety critical temperature, the pure boiler heating control strategy will be determined as the target heating control strategy.

[0084] In this embodiment, the heat pump shutdown operating condition range is the operating condition range in which the heat pump is not allowed to start. For example, the range is divided by setting the heat pump safety critical temperature. If the current ambient temperature is less than or equal to the preset heat pump safety critical temperature, that is, it is in the heat pump shutdown operating condition range, then the pure boiler heating control strategy is determined as the target heating control strategy.

[0085] It is understood that the heat pump may include other forced shutdown protection factors. In this embodiment, the heat pump is controlled not to start actively by the current ambient temperature being lower than the heat pump's safety critical temperature, so as to achieve heat pump protection during the startup phase. Other forced shutdown protection factors are passively generated after the heat pump is turned on.

[0086] Optionally, when the target heating control strategy allows the heat pump to be started for heating, if a pure heat pump heating control strategy or a linkage heating control strategy is executed, and the heat pump shutdown protection is triggered, the boiler is controlled to heat. This embodiment does not impose specific restrictions on the factors that trigger the shutdown protection after the heat pump is started.

[0087] Specifically, determining the pure heat pump heating control strategy as the target heating control strategy if the current ambient temperature, the target optimal COP value, and the equilibrium point COP value are all within any heat pump priority operating range includes: if the current ambient temperature is greater than the preset heat pump over-supply critical temperature, and the target optimal COP value is greater than or equal to the equilibrium point COP value, then the pure heat pump heating control strategy is determined as the target heating control strategy. In this embodiment, the current ambient temperature is greater than the preset heat pump over-supply critical temperature, the heat pump's heating capacity is greater than the terminal heating demand, and further, the target optimal COP value is greater than or equal to the equilibrium point COP value. At this time, the heat pump's heating cost is less than the boiler's heating cost, so only the heat pump can be started for heating to achieve the purpose of energy saving and carbon reduction.

[0088] In this embodiment, the instruction-driven operating condition range is the range in which the final strategy is determined based on the current target energy consumption mode instruction of the heat pump. The target energy consumption mode instruction is an instruction generated by the integrated energy system based on the corresponding parameters. Each energy consumption mode instruction corresponds to an energy consumption mode and the corresponding linkage control strategy. Each energy consumption mode focuses on a different control purpose, and the corresponding control purpose is achieved by executing the corresponding linkage control strategy.

[0089] The aforementioned command-driven operating condition range can be either a command-driven operating condition range or a target optimal COP value greater than or equal to the equilibrium point COP value, i.e., COPmid ≥ COPs, and the current ambient temperature is less than or equal to the heat pump over-supply temperature, and the current ambient temperature is greater than the heat pump safety critical temperature, i.e., within (-T e_sc T e_osc ].

[0090] It should be further explained that, compared to the third embodiment of the integrated energy system including photovoltaic equipment, this embodiment does not need to further determine whether the energy consumption mode command is an intelligent mode command when the target optimal COP value is less than the equilibrium point COP value.

[0091] This embodiment does not impose specific restrictions on the method of confirming the target energy consumption mode command. For example, it can refer to the third embodiment and generate the target energy consumption mode command based on the system configuration information corresponding to the integrated energy system, the electricity price of the next time period, and the current corresponding electricity trading direction, according to the current electricity price, the target system configuration information, the electricity price of the next time period, the current corresponding electricity trading direction, and the preset heat pump operation strategy table.

[0092] 206. Control the integrated energy system for heating according to the target heating control strategy.

[0093] Specifically, if the target heating control strategy is a pure boiler heating control strategy, only the boiler is turned on for heating; if the target heating control strategy is a pure heat pump heating control strategy, only the heat pump is turned on for heating; if the target heating control strategy is a linkage heating control strategy, control the integrated energy system for heating according to the linkage heating control strategy.

[0094] In a feasible implementation manner, if the above steps determine that the target heating control strategy allows the heat pump to start, the heat pump centralized control subsystem needs to determine whether it has received a restricted load ratio instruction, that is, whether the integrated energy system restricts the total output capacity of the heat pump centralized control subsystem. In practical applications, this restriction often manifests in the form of a ratio, such as an output restriction ratio. For example, if the input signal is 0 - 10V, 10V indicates that the heat pump centralized control subsystem is allowed to output at 100% full load, and 5V indicates that the project is allowed to output at a maximum of 50% load.

[0095] If a restricted load ratio instruction is received, the heat pump centralized control subsystem needs to determine the number of heat pumps to be started and / or the optimal centralized control output load ratio according to the load demand and the output restriction. The heat pump centralized control subsystem starts the heat pumps according to the number of heat pumps to be started, and controls the real - time output load ratio of each heat pump not to exceed the optimal centralized control output load ratio. While taking into account the best efficiency, it avoids exceeding the external limit. Through the coordinated operation of real - time control and periodic control for multi - heat pump linkage control, while controlling the total output of the heat pump centralized control subsystem, it also takes into account the balanced control of the heat pump centralized control subsystem. While meeting the load demand, it makes the started heat pumps be in the best range as much as possible, improving the overall energy efficiency of the heat pump centralized control subsystem, reducing the overall energy consumption of the heat pump centralized control subsystem, and saving the cost of the heat pump centralized control subsystem.

[0096] The method for determining the above - mentioned number of heat pumps to be started is: determine the current restricted demand output capacity of the heat pump centralized control subsystem according to the total output capacity and the output restriction parameter; determine the allowable number of started units according to the restricted demand output capacity and the optimal centralized control output load ratio corresponding to the optimal centralized control frequency point in the target operating frequency range.

[0097] The method for determining the above - mentioned optimal centralized control output load ratio is: determine the ratio between the optimal centralized control frequency point and the maximum restricted frequency as the optimal centralized control output load ratio LoadPercent.

[0098] In this embodiment, the optimal centralized control frequency point is used to indicate any convenient adjustable frequency point in the target operating frequency range. The optimal centralized control frequency point can be set to the average value of the maximum frequency and the minimum frequency in the target operating frequency range, that is, the intermediate frequency. It can also be set to other values in this target operating frequency range, such as 60%, 70% of the maximum frequency or other values.

[0099] Based on the median COPmaxmid of the optimal frequency of the heat pump central control subsystem as a reference parameter, the target operating frequency range [FREQlow, FREQhigh] corresponding to COPmaxmid can be determined according to the heat pump performance monitoring table. The optimal central control frequency point is set as FREQmid = (FREQlow + FREQhigh) ÷ 2, and the maximum operating frequency of the already started heat pump is controlled not to exceed FREQmid.

[0100] The optimal centralized control output load ratio mentioned above is the ratio between the optimal centralized control frequency point and the maximum limiting frequency. For example, if the optimal centralized control frequency point is the midpoint frequency FREQmid of the target operating frequency range, the optimal centralized control output load ratio LoadPercent = FREQmid ÷ FREQmax.

[0101] It should be further clarified that the maximum limiting frequency FREQmax is different from the maximum frequency of the target operating frequency range mentioned above. The maximum limiting frequency is the limit that the compressor operating frequency of the heat pump can reach under the current ambient temperature, while the maximum frequency of the target operating frequency range FREQhigh is just an artificially defined range value.

[0102] Taking the low-power linkage heating control strategy as an example, if the current water temperature is in the low water temperature range, the real-time operating load ratio of the heat pump will not exceed the optimal centralized control output load ratio LoadPercent. If the time in the low water temperature range exceeds the first preset time, the load limit will be lifted.

[0103] In this embodiment, the historical optimal COP value of each heat pump in the heat pump centralized control subsystem under the current operating conditions is determined through a heat pump performance monitoring table. The maximum conversion rate corresponding to multiple heat pumps is also determined to establish a centralized control conversion rate reference value. This reference value is used to quickly compare the heating costs of the boiler and heat pumps under different time periods and operating conditions with the equilibrium point COP value. The target optimal COP value, i.e., the centralized control conversion rate reference value, can be confirmed without starting the heat pumps, avoiding the reduced lifespan caused by frequent heat pump starts. The target heating control strategy can be confirmed directly without starting the heat pumps and boilers, avoiding frequent switching between heat pumps and boilers. An efficient linkage mechanism is established through the target heating control strategy table, enabling flexible adjustment of heating control. When heat pumps are allowed to start, they are controlled based on the optimal centralized control output load ratio, balancing optimal efficiency with avoiding exceeding external limitations. This reduces overall heating costs while ensuring user comfort and improves the system's robustness, stability, and reliability.

[0104] In practical applications, integrated energy systems may also include photovoltaic (PV) equipment. In this case, the heat pump can be powered by both PV and mains electricity. How to achieve coordinated control of the PV equipment, boiler, and heat pump is key to improving energy utilization efficiency, increasing the self-consumption rate of PV power generation, reducing electricity costs, and enhancing user comfort. Please refer to [link / reference needed]. Figure 3 Another embodiment of the integrated energy system heating joint control method in this application includes:

[0105] 301. Obtain the current electricity price, natural gas price, and multiple operating condition parameters, including at least the current ambient temperature.

[0106] 302. Determine the cost balance point for generating unit heat between the heat pump and the boiler based on the current electricity price and natural gas price, and obtain the corresponding balance point COP value for the heat pump.

[0107] 303. Determine the target heat pump operating condition range in the preset heat pump performance monitoring table based on multiple operating condition parameters, and obtain the target optimal COP value corresponding to the target heat pump operating condition range.

[0108] Steps 301-303 can be performed by referring to steps 201-203, and will not be repeated here.

[0109] 304. Determine the target heating control strategy based on the current ambient temperature, the target optimal COP value, and the equilibrium point COP value in the preset target heating control strategy table.

[0110] Optionally, if the current ambient temperature is within any heat pump shutdown operating condition range, the pure boiler heating control strategy is determined as the target heating control strategy; if the current ambient temperature, target optimal COP value, and equilibrium point COP value are within any heat pump priority operating condition range, the pure heat pump heating control strategy is determined as the target heating control strategy; if the current ambient temperature, target optimal COP value, and equilibrium point COP value are within any command-driven operating condition range, the target energy consumption mode command corresponding to the current heat pump is obtained, and the target heating control strategy is determined based on the target optimal COP value, equilibrium point COP value, and target energy consumption mode command.

[0111] In this embodiment, the target heating control strategy table includes at least two heat pump shutdown operating condition intervals and at least two command-driven operating condition intervals. Each heating operating condition interval corresponds to a heating control strategy, as shown in Table 2 below.

[0112]

[0113] In Table 2 above, -T e_sc T represents the critical safety temperature of the heat pump, which is the minimum ambient temperature at which the heat pump can operate safely. e_oscThis is the over-critical temperature of the heat pump. If the ambient temperature is higher than this value, the heat pump can independently meet the user's heating needs.

[0114] Specifically, when the current ambient temperature is higher than the heat pump's safe critical temperature, the boiler and heat pump can be started, that is, they are within the command-driven operating range. In this embodiment, the current energy consumption mode is obtained, and the heating equipment cost is combined with the target optimal COP value and the balance point COP value to achieve linkage control.

[0115] In this embodiment, the target system configuration information is used to indicate the system configuration within the control area of ​​the integrated energy system. For example, in a residential scenario, it indicates whether relevant power generation, consumption, and storage equipment are configured in a household user. This embodiment uses the target system configuration information to improve the robustness of the integrated energy system and adapt to various application scenarios.

[0116] In this embodiment, the current corresponding power trading direction is used to indicate the current power flow direction of the distribution network. The power trading direction includes selling electricity and buying electricity. Selling electricity means that electricity flows from the control area (such as household users) to the distribution network, and buying electricity means that electricity flows from the distribution network to household users.

[0117] In this embodiment, the electricity price for the next time period is the standard electricity price for the next time period of the distribution network, such as the electricity price standard for the next hour. The duration of each electricity price period can be set to half an hour, one hour, two hours, or other preset durations; there are no specific limitations.

[0118] Furthermore, electricity prices can be divided into multiple levels, such as high electricity price (peak price), medium electricity price (flat price), and low electricity price (valley price). This embodiment determines the target energy consumption mode of the heat pump based on the current electricity price and the electricity price of the next time period. Compared with directly switching the energy consumption mode through peak and valley electricity, it can take into account both electricity costs and user comfort.

[0119] Understandably, if the target system configuration information does not contain energy storage device information, such as the integrated power generation and consumption control system not being configured with energy storage batteries, the current remaining power is determined to be 0 or none. When the target system configuration information contains energy storage device information, the current remaining power can be divided into multiple levels. For example, when the current remaining power (State of Charge, SOC) is [70%, 100%], it is determined to be high power; when the SOC is [30%, 70%), it is determined to be medium power; and when the SOC is [0%, 30%), it is determined to be medium power.

[0120] The above generates the target energy consumption mode instruction based on the current electricity price, target system configuration information, next time period electricity price, the current corresponding power trading direction, and the preset heat pump operation strategy table.

[0121] In this embodiment, the heat pump operation strategy table may include multiple candidate energy consumption modes. Each candidate energy consumption mode corresponds to an energy consumption mode instruction. The linkage control strategy corresponding to each candidate energy consumption mode is different. The corresponding control purpose is achieved by executing the corresponding linkage control strategy.

[0122] The aforementioned candidate energy consumption modes may include intelligent mode, energy storage mode, energy saving mode, low power consumption mode, comfort mode, etc., and can be further set according to actual conditions. This embodiment does not impose specific limitations.

[0123] The aforementioned linkage control strategy is used to indicate the set of control commands corresponding to the heat pump. The set of control commands may include start-up and shutdown conditions, frequency regulation control conditions, auxiliary heating start-up conditions, and whether the set temperature needs to be adjusted. The heat pump executes the linkage control strategy corresponding to each candidate energy consumption mode to achieve the control objective corresponding to each candidate energy consumption mode. For example, the control objective of the energy storage mode is to store energy as quickly as possible. When the heat pump executes the linkage control strategy corresponding to the energy storage mode, it can forcibly increase the user-set temperature, freely adjust the heat pump's operating frequency, and allow the boiler to perform auxiliary heating and other control actions to achieve the control objective of storing energy as quickly as possible.

[0124] To facilitate understanding, an example of a heat pump operation strategy table is provided, taking the current system configuration with photovoltaic equipment and energy storage equipment as an example.

[0125] Table 4

[0126]

[0127]

[0128] Optionally, if the direction of the electricity transaction is selling electricity, the smart mode is determined as the target energy efficiency mode in the heat pump operation strategy table, and a smart mode instruction is obtained; if the direction of the electricity transaction is buying electricity, the target energy efficiency mode instruction is determined in the heat pump operation strategy table based on the target system configuration information, the current electricity price, and the next electricity price.

[0129] Optionally, if the electricity trading direction is selling electricity, it is determined whether the current electricity price is low. If so, an energy storage mode instruction is generated according to the heat pump operation strategy table; otherwise, an intelligent mode instruction is generated according to the heat pump operation strategy table. In this embodiment, the target energy efficiency mode of the heat pump in the electricity selling scenario is flexibly adjusted according to the real-time electricity price. When the electricity price is low, the energy storage mode is executed to store energy as soon as possible, while when the electricity price is not low, the intelligent mode is executed to achieve accurate control of energy storage. This avoids increasing the heat pump operation frequency when the current electricity price is high and the electricity selling power is not high, which would lead to an increase in electricity demand, resulting in unnecessary increase in electricity costs and waste of electricity.

[0130] It is understandable that both the energy storage mode and the intelligent mode can achieve the energy storage purpose of the heat pump. The energy storage mode focuses on storing energy as quickly as possible, while the intelligent mode, while achieving energy storage, also focuses on the accurate linkage control of the heat pump. The intelligent mode executes a more detailed linkage control strategy based on the actual operating conditions. Since the intelligent mode restricts the frequency increase conditions of the heat pump, under certain conditions, such as when the current water temperature is in the medium to high temperature range and the power output does not exceed the preset power, the heat pump is not allowed to increase its frequency in the intelligent mode. Under the above conditions, the energy storage speed of the heat pump in the energy storage mode is faster than that in the intelligent mode.

[0131] Optionally, if the direction of the electricity transaction is to purchase electricity, the target energy efficiency mode instruction is determined in the heat pump operation strategy table based on the target system configuration information, the current electricity price, and the electricity price for the next period. This includes: when the direction of the electricity transaction is to purchase electricity, determining the current remaining electricity based on the target system configuration information; and determining whether the current electricity price is a low price.

[0132] If so, when the electricity price in the next period is low, determine whether the current power purchase exceeds the preset target power threshold; if so, generate a smart mode instruction based on the heat pump operation strategy table; otherwise, generate an energy storage mode instruction based on the heat pump operation strategy table; when the electricity price in the next period is medium / high, generate an energy storage mode instruction based on the heat pump operation strategy table; this embodiment further selects the energy consumption mode based on the power purchase in the scenario where both the current electricity price and the next period are low and the power transaction direction is power purchase. When the current power purchase is large, the heat pump frequency is reduced to accurately control the power consumption of the heat pump in the current period, thereby reducing the overall power cost.

[0133] If not, then if the current electricity price is medium, determine whether the remaining electricity is high or medium; if yes, generate an energy-saving mode command according to the heat pump operation strategy table; if not, then if the next electricity price is low, generate a low-power mode command according to the heat pump operation strategy table; if the next electricity price is medium, generate an energy-saving mode command according to the heat pump operation strategy table; if the next electricity price is high, generate a comfort mode command according to the heat pump operation strategy table. If the current electricity price is high and the remaining electricity is high or medium, if the next electricity price is medium or low, generate an energy-saving mode command according to the heat pump operation strategy table; otherwise, generate a low-power mode command according to the heat pump operation strategy table. If the current electricity price is high and the remaining electricity is low or zero, if the next electricity price is medium or low, generate a low-power mode command according to the heat pump operation strategy table; otherwise, generate an energy-saving mode command according to the heat pump operation strategy table.

[0134] Understandably, when purchasing electricity with power generation equipment and energy storage batteries, the accurate selection of the target energy consumption mode under the current medium-priced electricity price is crucial for improving overall energy utilization, balancing electricity costs, and user comfort. Compared to whether the current electricity price is high or low, the current medium-priced electricity price represents a relatively balanced, complex, and critical state in the electricity market. Choosing an appropriate target energy consumption mode is of great significance for ensuring system stability, reducing costs, and coping with electricity price fluctuations.

[0135] The aforementioned power purchase capacity represents the current power shortage within the integrated energy system's control area, which is the difference between the total power required by the current electrical equipment in the integrated energy system and the total power generated by the power generation equipment and / or the total power stored by the energy storage equipment.

[0136] The above-mentioned determination of the target heating control strategy based on the target optimal COP value, the equilibrium point COP value, and the target energy consumption mode command includes: when the target energy consumption mode command is an intelligent mode command, the intelligent linkage heating control strategy corresponding to the intelligent mode command is determined as the target heating control strategy; when the target energy consumption mode command is not an intelligent mode command, it is determined whether the target optimal COP value is less than the equilibrium point COP value; if so, the pure boiler heating strategy is determined as the target heating control strategy; if not, the target linkage heating control strategy corresponding to the target energy consumption mode command is determined as the target heating control strategy. In this embodiment, when the target optimal COP is less than the equilibrium point COP, boiler heating is prioritized in most cases. Only when an intelligent mode command is received, since the photovoltaic power generation is sufficient and there is still redundancy after meeting the power consumption of all loads, and the redundant photovoltaic power is clean energy with no electricity cost, the intelligent linkage heating control strategy is determined as the target heating control strategy, and only then is the heat pump prioritized for auxiliary heating by the boiler. When the optimal COP for other objectives is less than the equilibrium point COP, boiler heating is usually prioritized in most cases to reduce the overall heating cost of the system and improve the self-consumption rate of photovoltaic equipment.

[0137] 305. Control the integrated energy system for heating according to the target heating control strategy.

[0138] Specifically, if the target heating control strategy is a pure boiler heating control strategy, then only the boiler will be turned on for heating; if the target heating control strategy is a pure heat pump heating control strategy, then only the heat pump will be turned on for heating; if the target heating control strategy is a linked heating control strategy, then the heat pump will be turned on first for heating according to the linked heating control strategy, and the boiler will be controlled to provide auxiliary heating.

[0139] In this embodiment, the operating condition parameters may include the current operating temperature, the initial set temperature, the preset hysteresis temperature, etc., wherein the initial set temperature is used to indicate the temperature to be achieved by the user setting or preset, such as the heating set temperature or the set water temperature; the current operating temperature is used to indicate the actual temperature within the target adjustment area of ​​the heat pump, that is, the real-time temperature, such as the indoor temperature or the inlet water temperature of the target area (such as the inlet water temperature of the water tank or the actual water temperature of the water tank), etc.

[0140] The preset hysteresis temperature includes positive hysteresis temperature and negative hysteresis temperature. Positive hysteresis is used to indicate the allowable positive deviation value, and negative hysteresis is used to indicate the allowable negative deviation value. For example, the positive hysteresis temperature is set to 2℃, the negative hysteresis temperature is set to 1℃, and the set temperature is 26℃. Specifically, in heating mode, the temperature is determined to be 28℃ by the positive hysteresis temperature, meaning that the real-time operating temperature is within the allowable range when it is between 26℃ and 28℃. The temperature is determined to be 25℃ by the negative hysteresis temperature, meaning that the real-time operating temperature is within the allowable range when it is between 25℃ and 26℃, in order to improve system stability and avoid frequent start-stop.

[0141] In this embodiment, the linkage heating control strategy may include temperature range regulation method, heat pump start-up and shutdown regulation method, set temperature adjustment method, etc., to achieve the corresponding control objectives.

[0142] Optionally, the target set temperature is determined based on the target linkage control strategy and the initial set temperature; the heat pump is controlled to start or stop based on the current operating temperature and the target start-up temperature and target stop temperature corresponding to the target linkage control strategy; when the heat pump is started, the target temperature range is matched among multiple temperature gradient ranges corresponding to the target linkage control strategy based on the current operating temperature, and the heat pump is controlled according to the heat pump control command corresponding to the target temperature range.

[0143] Specifically, determining the target set temperature based on the target linkage control strategy and the initial set temperature includes: determining whether to adjust the initial set temperature based on the linkage heating control strategy; if so, adjusting the initial set temperature based on the preset target energy storage temperature difference to obtain the target set temperature; otherwise, determining the initial set temperature as the target set temperature.

[0144] Specifically, if the target linkage control strategy is an energy storage control strategy, the heat pump is controlled to operate normally based on the target start-up temperature and target shutdown temperature. The boiler is allowed to provide auxiliary heating, and the heat pump operating frequency can be freely adjusted below the upper limit frequency of the range to achieve rapid energy storage. In this case, the target start-up temperature is determined based on the adjusted target set temperature and the positive hysteresis temperature. For example, in hot water mode, the initial set temperature is 45℃, the positive hysteresis temperature is 2℃, and the negative hysteresis temperature is 2℃. Under the energy storage control strategy, the set temperature is forcibly increased, and the adjusted target set temperature is 50℃. The determined target shutdown temperature is 52℃, and the target start-up temperature is 48℃. The heat pump stops when the current operating temperature is greater than 52℃ and starts when it is less than 48℃. During the start-up period, the heat pump operating frequency can be freely adjusted below the upper limit frequency of the range, and the boiler is allowed to provide auxiliary heating to achieve rapid energy storage.

[0145] Specifically, if the target linkage control strategy is a comfort control strategy, the heat pump will operate normally based on the target start-up temperature and target stop-up temperature. The boiler is allowed to provide auxiliary heating, and the heat pump's operating frequency can be freely adjusted below the upper limit of the frequency range. In this case, the target start-up temperature is determined based on the initial set temperature and the positive hysteresis temperature. Continuing with the hot water mode example above, under the comfort control strategy, the target set temperature is 45℃, the determined target stop-up temperature is 47℃, and the target start-up temperature is 43℃. The heat pump will stop when the current operating temperature is above 47℃ and start when it is below 43℃. During operation, the heat pump's operating frequency can be freely adjusted below the upper limit of the frequency range, and the boiler is allowed to provide auxiliary heating to meet user needs.

[0146] In this embodiment, the multiple temperature gradient intervals can be three, four, or other numbers of temperature intervals to achieve flexible control. Taking three temperature gradient intervals as an example, the first temperature interval is used to indicate the temperature interval that meets the user's needs, such as reaching or exceeding the user's preset target temperature (including setting the hot water temperature or setting the heating temperature). The second temperature interval is used to indicate the temperature interval that is close to the user's needs, such as not reaching the user's preset target temperature but within the allowable range. The third temperature interval is used to indicate the temperature interval that deviates from the user's needs, that is, exceeds the allowable range, and the heat pump needs to be started to perform energy conversion.

[0147] Taking four temperature ranges as an example, for heating mode and hot water mode: the fourth temperature range corresponds to a temperature greater than the target shutdown temperature; the fifth temperature range corresponds to a temperature less than the target shutdown temperature but greater than the target set temperature; the sixth temperature range corresponds to a temperature less than the target set temperature but greater than the target start-up temperature; and the seventh temperature range corresponds to a temperature less than the target start-up temperature. The fifth to seventh temperature ranges mentioned above can refer to the same heat pump control actions as the first to third temperature ranges mentioned above. However, the fourth temperature range may cause discomfort to the user. The heat pump control actions in this range may include controlling the heat pump to shut down, and / or activating safety measures, and / or generating alarm prompts. For example, in hot water mode, if the current operating temperature is in the fourth temperature range, the heat pump is controlled to perform a cooling operation, and the user is prompted to check the current temperature or perform maintenance.

[0148] Optionally, if the target heating control strategy is an intelligent linkage heating control strategy, then the target temperature range is matched among the current multiple temperature gradient ranges based on the current operating temperature. When the target temperature range is a medium-temperature range or a high-temperature range, the current electricity trading power is obtained, and the heat pump operating frequency is adjusted according to the electricity trading power, with the adjusted heat pump operating frequency being less than the upper limit frequency of the target compressor frequency range. When the target temperature range is a low-temperature range, the heat pump is controlled to heat at a frequency not exceeding the upper limit frequency of the target compressor frequency range, and when the low-temperature range reaches a first preset duration, the boiler is allowed to start for auxiliary heating. For example, in hot water mode, if the target temperature is forcibly increased by 5°C and the current operating temperature is in the low water temperature range (i.e., the third temperature range), the heat pump will operate normally. If the time spent in the low water temperature range exceeds 60 minutes, the boiler is allowed to provide auxiliary heating. If the current operating temperature is in the medium-high water temperature range (the first and second temperature ranges), and if the electricity trading power is the selling power and the selling power is greater than 200W, the heat pump operating frequency can be freely adjusted below the upper limit frequency of the range. If the electricity trading power is the selling power and 0 < selling power ≤ 200W, frequency increase is not allowed. If the electricity trading power is the buying power and the buying power is greater than 200W, the frequency will be forcibly reduced according to 6Hz / min.

[0149] It should be further explained that the application scenario corresponding to the power purchase judgment in the above-mentioned electricity selling scenario can be as follows: Current sunlight conditions are good, and photovoltaic power generation slightly exceeds demand, with a total power output of 1000W. Assuming the heat pump's power demand is 850W, the electricity selling power is greater than zero but less than a preset first power threshold (e.g., 200W), resulting in an electricity selling power of 150W. The current water temperature is in the medium or high temperature range. If clouds or other obstructions cause a sudden drop in photovoltaic power generation, reducing the total power output to 600W, the heat pump experiences a 250W power shortfall. Therefore, a power purchase of 250W is required, exceeding the second power threshold (200W). In this case, to avoid frequent switching of the target energy efficiency mode and to prevent increased electricity costs due to power purchases, the heat pump can be forced to reduce its frequency to lower the required power. This embodiment increases the system's flexibility by setting a power purchase threshold judgment in the electricity selling scenario.

[0150] Optionally, if the target heating control strategy is a low-power linkage heating control strategy or an energy-saving linkage heating control strategy, then the target temperature range is matched among the current multiple temperature gradient ranges based on the current operating temperature; when the target temperature range includes load limiting conditions, the smaller frequency between the load limiting frequency corresponding to the load limiting conditions and the upper limit frequency of the target compressor frequency range is determined as the target limiting frequency, and the operating frequency of the heat pump is controlled to not exceed the target limiting frequency for heating.

[0151] Optionally, when the heat pump reaches the target limiting frequency of the target compressor frequency range, and the running time at the target limiting frequency reaches the second preset duration, it is determined whether the current operating temperature is greater than or equal to the target set temperature; if so, the current operating state is maintained; if not, the boiler is controlled to provide auxiliary heating.

[0152] Optionally, if the heat pump does not meet the heating demand at the upper limit frequency of the target range, the second target optimal COP corresponding to the high-frequency heat pump operating range is obtained. If the second target optimal COP is greater than or equal to the equilibrium point COP value, and the heat pump is not under load limitation, the heat pump operation is limited according to the upper limit frequency of the second range corresponding to the high-frequency heat pump operating range. If the second target optimal COP is less than the equilibrium point COP value, or the heat pump is under load limitation, the boiler is allowed to start for auxiliary heating. This embodiment determines whether the current maximum limiting frequency of the heat pump can be increased by using the second target optimal COP of the high-frequency heat pump operating range. If the second target optimal COP is greater than or equal to the equilibrium point COP value, that is, the unit heating cost of the heat pump is still lower than that of the boiler when the heat pump is in the high-frequency heat pump operating range, the upper limit frequency of the second range limited by the high-frequency heat pump operating range is used for control, which expands the frequency adjustment range of the current heat pump, reduces the need for auxiliary heating of the boiler, and improves the stability of the system.

[0153] The aforementioned target heat pump operating condition range includes the first compressor frequency range and other operating condition parameter ranges. The high-frequency heat pump operating condition range includes the second compressor frequency range and other operating condition parameter ranges. The minimum value of the second compressor frequency range is greater than the maximum value of the first compressor frequency range. The ranges corresponding to other operating condition parameter ranges in the target heat pump operating condition range and the high-frequency heat pump operating condition range are the same. The second target optimal COP corresponding to the high-frequency heat pump operating condition range is less than the first target optimal COP corresponding to the target heat pump operating condition range.

[0154] Optionally, if the target heating control strategy is a low-power linkage heating control strategy, then when the target temperature range is a medium-temperature range or a high-temperature range, the heat pump is controlled to standby; when the target temperature range is a low-temperature range, the operating frequency of the heat pump is controlled to not exceed the target limit frequency for heating, and when the first preset duration is reached in the low-temperature range, the boiler is allowed to start for auxiliary heating.

[0155] Optionally, if the target heating control strategy is an energy-saving linkage heating control strategy, then when the target temperature range is a high temperature range, the heat pump is controlled to standby; when the target temperature range is a medium temperature range, the operating frequency of the heat pump is controlled to not exceed the target limit frequency for heating; when the target temperature range is a low temperature range, the heat pump is controlled to heat at a frequency not exceeding the upper limit of the target compressor frequency range, and when the first preset duration is reached in the low temperature range, the boiler is allowed to start for auxiliary heating.

[0156] The following table (Table 3) provides a coordinated heating control strategy for a heat pump central control subsystem in multi-heat pump scenarios:

[0157]

[0158]

[0159] In this embodiment, the target optimal COP value of the heat pump under various operating conditions and the equilibrium point COP value between the heat pump and the boiler at the current time period are determined by the heat pump performance monitoring table. This allows for rapid comparison of the heating costs of the boiler and heat pump under various time periods and operating conditions. The target optimal COP value can be confirmed without starting the heat pump, avoiding the reduced lifespan caused by frequent heat pump starts. The target heating control strategy can be confirmed directly without starting the heat pump and boiler, avoiding frequent switching between the heat pump and boiler. An efficient linkage mechanism is established through the target heating control strategy table, enabling flexible adjustment of heating control. By combining information such as grid electricity price, natural gas price, heat pump energy efficiency, and boiler thermal efficiency through the integrated energy system, and when photovoltaic equipment and energy storage equipment are configured, the integrated energy system can further consider factors such as photovoltaic power generation redundancy power and photovoltaic energy storage battery SOC status, providing an efficient, energy-saving, and carbon-reducing heating solution. This achieves linkage control between the heat pump, boiler, and other power generation and energy storage equipment to reduce heating costs, improve system economic efficiency, and ensure user comfort.

[0160] The above describes the integrated energy system heating control method of this application. The following describes the integrated energy system heating control device of this application. Please refer to [link / reference]. Figure 4 One embodiment of the integrated energy system heating joint control device in this application includes:

[0161] The acquisition module 401 is used to acquire the current electricity price, natural gas price and multiple operating condition parameters, including at least the current ambient temperature.

[0162] The first determining module 402 is used to determine the cost balance point for generating unit heat between the heat pump and the boiler based on the current electricity price and natural gas price, and to obtain the balance point COP value corresponding to the heat pump.

[0163] The second determining module 403 is used to determine the target heat pump operating condition range in a preset heat pump performance monitoring table based on multiple operating condition parameters, and to obtain the target optimal COP value corresponding to the target heat pump operating condition range.

[0164] The heating control module 404 is used to control the heating of the integrated energy system based on the current ambient temperature, the target optimal COP value, the equilibrium point COP value, and the preset target heating control strategy table.

[0165] In this embodiment, the target optimal COP value of the heat pump under various operating conditions and the balance point COP value between the heat pump and the boiler at the current time period are determined by the heat pump performance monitoring table. The heating cost of the boiler and heat pump under various time periods and operating conditions can be quickly compared. The target optimal COP value can be confirmed without starting the heat pump, avoiding the reduction of the heat pump's lifespan due to frequent start-ups. The target heating control strategy can be confirmed directly without starting the heat pump and boiler, avoiding frequent switching between the heat pump and boiler. An efficient linkage mechanism is established through the target heating control strategy table to achieve flexible adjustment of heating control. While reducing the overall heating cost, user comfort is also taken into account, and the robustness, stability and reliability of the system are improved.

[0166] Please see Figure 5 Another embodiment of the integrated energy system heating joint control device in this application includes:

[0167] The acquisition module 401 is used to acquire the current electricity price, natural gas price and multiple operating condition parameters, including at least the current ambient temperature.

[0168] The first determining module 402 is used to determine the cost balance point for generating unit heat between the heat pump and the boiler based on the current electricity price and natural gas price, and to obtain the balance point COP value corresponding to the heat pump.

[0169] The second determining module 403 is used to determine the target heat pump operating condition range in a preset heat pump performance monitoring table based on multiple operating condition parameters, and to obtain the target optimal COP value corresponding to the target heat pump operating condition range.

[0170] The heating control module 404 is used to control the heating of the integrated energy system based on the current ambient temperature, the target optimal COP value, the equilibrium point COP value, and the preset target heating control strategy table.

[0171] Optionally, the heating control module 404 includes:

[0172] The determining unit 4041 is used to determine the target heating control strategy based on the current ambient temperature, the target optimal COP value, and the equilibrium point COP value in a preset target heating control strategy table.

[0173] The heating unit 4044 is used to control the integrated energy system to provide heating according to the target heating control strategy.

[0174] Optionally, the determining unit 4041 includes:

[0175] The first determining subunit 40411 is used to determine the pure boiler heating control strategy as the target heating control strategy if the current ambient temperature is within any heat pump shutdown operating condition range.

[0176] The second determining subunit 40412 is used to determine the pure heat pump heating control strategy as the target heating control strategy if the current ambient temperature, the target optimal COP value, and the equilibrium point COP value are within any heat pump priority operating range.

[0177] The third determining subunit 40413 is used to obtain the target energy consumption mode command corresponding to the heat pump if the current ambient temperature, the target optimal COP value, and the balance point COP value are within any command-driven operating condition range, and to determine the target heating control strategy based on the target optimal COP value, the balance point COP value, and the target energy consumption mode command.

[0178] Optionally, the third determining subunit 40413 is specifically used to obtain the system configuration information, the electricity price for the next period, and the current corresponding electricity trading direction of the integrated energy system if the current ambient temperature, the target optimal COP value, and the equilibrium point COP value are within any instruction-driven operating condition range.

[0179] The target energy consumption mode instruction is generated based on the current electricity price, target system configuration information, next time period electricity price, the current corresponding power trading direction, and the preset heat pump operation strategy table.

[0180] When the target optimal COP is greater than or equal to the equilibrium point COP, the target linkage control strategy corresponding to the target energy consumption mode command is determined as the target heating control strategy.

[0181] When the target optimal COP is less than the equilibrium point COP, determine whether the target energy consumption mode command is a smart mode command;

[0182] If so, the intelligent linkage heating control strategy corresponding to the intelligent mode command will be determined as the target heating control strategy.

[0183] If not, then the pure boiler heating control strategy will be determined as the target heating control strategy.

[0184] Optionally, the first determining subunit 40411 is used to determine the pure boiler heating control strategy as the target heating control strategy if the current ambient temperature is less than or equal to the preset heat pump safety critical temperature, and / or the target optimal COP value is less than the equilibrium point COP value.

[0185] The second determining subunit 40412, if the current ambient temperature is greater than the heat pump safety critical temperature, the current ambient temperature is less than or equal to the preset heat pump over-supply critical temperature, and the target optimal COP value is greater than or equal to the equilibrium point COP value, then the pure heat pump heating control strategy is determined as the target heating control strategy, and the heat pump over-supply critical temperature is greater than the heat pump safety critical temperature.

[0186] The third determining subunit 40413 is used to determine the target linkage control strategy as the target heating control strategy if the current ambient temperature is greater than the preset heat pump over-supply critical temperature and the target optimal COP value is greater than or equal to the equilibrium point COP value.

[0187] Optionally, the heating unit 4044 is specifically used for:

[0188] If the target heating control strategy is an intelligent linkage heating control strategy, then the target temperature range is matched among the current multiple temperature gradient ranges based on the current operating temperature.

[0189] When the target temperature range is a medium temperature range or a high temperature range, the current power trading power is obtained, and the heat pump operating frequency is adjusted according to the power trading power, and the adjusted heat pump operating frequency is less than the upper limit frequency of the target compressor frequency range.

[0190] When the target temperature range is a low temperature range, the heat pump is controlled to heat at a frequency not exceeding the upper limit of the target compressor frequency range, and when the first preset duration is reached in the low temperature range, the boiler is allowed to start for auxiliary heating.

[0191] Optionally, the heating unit 4044 is specifically used to: if the target heating control strategy is a low-power linkage heating control strategy or an energy-saving linkage heating control strategy, then match the target temperature range in the current multiple temperature gradient ranges according to the current operating temperature.

[0192] When the target temperature range includes load limiting conditions, the smaller frequency between the load limiting frequency corresponding to the load limiting conditions and the upper limit frequency of the target compressor frequency range is determined as the target limiting frequency, and the operating frequency of the heat pump is controlled to not exceed the target limiting frequency for heating.

[0193] Optionally, the second determining module 403 includes:

[0194] The conversion rate determination unit 4031 is used to determine the maximum conversion rate of each heat pump under the current operating condition based on multiple operating condition parameters in the heat pump performance monitoring table corresponding to each heat pump.

[0195] The centralized control reference unit 4032 is used to determine the centralized control conversion rate reference value based on the maximum conversion rate corresponding to multiple heat pumps, and to obtain the target operating frequency range corresponding to the centralized control conversion rate reference value.

[0196] Optionally, the centralized control reference unit 4032 is specifically used to determine the median of the maximum conversion rate based on the maximum conversion rates corresponding to multiple heat pumps, and to determine the median of the maximum conversion rate as the centralized control conversion rate reference value;

[0197] Determine the target operating frequency range in the heat pump performance monitoring table based on the centralized control conversion rate reference value.

[0198] In this embodiment, the historical optimal COP value of each heat pump in the heat pump centralized control subsystem under the current operating conditions is determined through a heat pump performance monitoring table. The maximum conversion rate corresponding to multiple heat pumps is also determined to establish a centralized control conversion rate reference value. This reference value is used to quickly compare the heating costs of the boiler and heat pumps under different time periods and operating conditions with the equilibrium point COP value. The target optimal COP value, i.e., the centralized control conversion rate reference value, can be confirmed without starting the heat pumps, avoiding the reduced lifespan caused by frequent heat pump starts. The target heating control strategy can be confirmed directly without starting the heat pumps and boiler, avoiding frequent switching between the heat pumps and boiler. An efficient linkage mechanism is established through the target heating control strategy table, enabling flexible adjustment of heating control. Furthermore, when heat pumps are allowed to start, they are controlled to start based on the optimal centralized control output load ratio, balancing optimal efficiency with avoiding exceeding external limitations. By integrating information such as grid electricity prices, natural gas prices, heat pump energy efficiency, and boiler thermal efficiency into a comprehensive energy system, the system can further consider factors such as redundant power of photovoltaic power generation and the state of charge (SOC) of photovoltaic energy storage batteries when photovoltaic equipment and energy storage equipment are configured. This provides efficient, energy-saving, and carbon-reducing heating solutions, enabling coordinated control between heat pumps, boilers, and other power generation and energy storage equipment. This reduces heating costs, improves system economic efficiency, and ensures user comfort.

[0199] above Figure 4 and Figure 5 The integrated energy system heating control device in this application is described in detail from the perspective of modular functional entities. The integrated energy system in this application is described in detail from the perspective of hardware processing.

[0200] See Figure 6 As shown, the integrated energy system includes a processor 600 and a memory 601. The memory 601 stores machine-executable instructions that can be executed by the processor 600. The processor 600 executes the machine-executable instructions to implement the aforementioned integrated energy system heating joint control method.

[0201] further, Figure 6 The integrated energy system shown also includes a bus 602 and a communication interface 603. The processor 600, the communication interface 603, and the memory 601 are connected via the bus 602.

[0202] The memory 601 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 603 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc. The bus 602 may be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 6 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0203] The processor 600 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 600 or by instructions in software form. The processor 600 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this disclosure. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this disclosure can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 601. Processor 600 reads the information in memory 601 and, in conjunction with its hardware, completes the method steps of the aforementioned embodiment.

[0204] This application also provides a computer-readable storage medium, which can be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium. The computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the steps of the integrated energy system heating joint control method.

[0205] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0206] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0207] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for joint control of heating in an integrated energy system, characterized in that, Applied to integrated energy systems, wherein the integrated energy system includes at least two types of heating equipment: heat pumps and boilers; The integrated energy system heating joint control method includes: The system obtains the current electricity price, natural gas price, and multiple operating condition parameters, including at least the current ambient temperature. Based on the current electricity price and the natural gas price, determine the cost balance point for generating unit heat between the heat pump and the boiler, and obtain the balance point COP value corresponding to the heat pump; Based on the multiple operating condition parameters, the target heat pump operating condition range is determined in the preset heat pump performance monitoring table, and the target optimal COP value corresponding to the target heat pump operating condition range is obtained. The integrated energy system is heated based on the current ambient temperature, the target optimal COP value, the equilibrium point COP value, and a preset target heating control strategy table.

2. The integrated energy system heating joint control method according to claim 1, characterized in that, The heating control of the integrated energy system based on the current ambient temperature, the target optimal COP value, the equilibrium point COP value, and a preset target heating control strategy table includes: The target heating control strategy is determined based on the current ambient temperature, the target optimal COP value, and the equilibrium point COP value in a preset target heating control strategy table. The integrated energy system is controlled to generate heat according to the target heating control strategy.

3. The integrated energy system heating joint control method according to claim 2, characterized in that, The integrated energy system also includes photovoltaic equipment. The target heating control strategy table includes at least two heat pump shutdown operating condition intervals, at least one command-driven operating condition interval, and at least one heat pump priority operating condition interval. Each heating operating condition interval corresponds to a heating control strategy. The step of determining the target heating control strategy based on the current ambient temperature, the target optimal COP value, and the equilibrium point COP value in a preset target heating control strategy table includes: If the current ambient temperature is within any heat pump shutdown operating range, then the pure boiler heating control strategy will be determined as the target heating control strategy. If the current ambient temperature, the target optimal COP value, and the equilibrium point COP value are all within any heat pump priority operating range, then the pure heat pump heating control strategy will be determined as the target heating control strategy. If the current ambient temperature, the target optimal COP value, and the equilibrium point COP value are all within the range of any one of the instruction-driven operating conditions, then the target energy consumption mode instruction corresponding to the heat pump is obtained, and the target heating control strategy is determined based on the target optimal COP value, the equilibrium point COP value, and the target energy consumption mode instruction.

4. The integrated energy system heating joint control method according to claim 3, characterized in that, If the current ambient temperature, the target optimal COP value, and the equilibrium point COP value are all within the range of any one of the instruction-driven operating conditions, then the target energy consumption mode instruction corresponding to the heat pump is obtained, including: If the current ambient temperature, the target optimal COP value, and the equilibrium point COP value are within any instruction-driven operating condition range, then obtain the system configuration information, the electricity price for the next time period, and the current corresponding electricity trading direction of the integrated energy system. The target energy consumption mode instruction is generated based on the current electricity price, target system configuration information, next time period electricity price, current corresponding power trading direction, and preset heat pump operation strategy table.

5. The integrated energy system heating joint control method according to claim 3, characterized in that, The step of determining the target heating control strategy based on the target optimal COP value, the equilibrium point COP value, and the target energy consumption mode command includes: When the target optimal COP is greater than or equal to the equilibrium point COP, the target linkage control strategy corresponding to the target energy consumption mode command is determined as the target heating control strategy. When the target optimal COP is less than the equilibrium point COP, it is determined whether the target energy consumption mode command is a smart mode command; If so, the intelligent linkage heating control strategy corresponding to the intelligent mode command will be determined as the target heating control strategy. If not, then the pure boiler heating control strategy will be determined as the target heating control strategy.

6. The integrated energy system heating joint control method according to claim 1, characterized in that, The integrated energy system does not include photovoltaic equipment; The step of determining the target heating control strategy based on the current ambient temperature, the target optimal COP value, and the equilibrium point COP value in a preset target heating control strategy table includes: If the current ambient temperature is less than or equal to the preset heat pump safety critical temperature, and / or the target optimal COP value is less than the equilibrium point COP value, then the pure boiler heating control strategy is determined as the target heating control strategy. If the current ambient temperature is greater than the heat pump safety critical temperature, the current ambient temperature is less than or equal to the preset heat pump over-supply critical temperature, and the target optimal COP value is greater than or equal to the equilibrium point COP value, then the pure heat pump heating control strategy is determined as the target heating control strategy, and the heat pump over-supply critical temperature is greater than the heat pump safety critical temperature. If the current ambient temperature is greater than the preset heat pump over-supply critical temperature, and the target optimal COP value is greater than or equal to the equilibrium point COP value, then the target linkage control strategy is determined as the target heating control strategy.

7. The integrated energy system heating joint control method according to any one of claims 3-6, characterized in that, The multiple operating condition parameters also include the current operating temperature, the target heat pump operating condition range also includes the target compressor frequency range, and the target linkage control strategy is an intelligent linkage heating control strategy. The step of controlling the integrated energy system to provide heating according to the target heating control strategy includes: If the target heating control strategy is an intelligent linkage heating control strategy, then the target temperature range is matched among the current multiple temperature gradient ranges based on the current operating temperature. When the target temperature range is a medium temperature range or a high temperature range, the current power trading power is obtained, and the heat pump operating frequency is adjusted according to the power trading power, and the adjusted heat pump operating frequency is less than the upper limit frequency of the target compressor frequency range. When the target temperature range is a low temperature range, the heat pump is controlled to heat at a frequency not exceeding the upper limit of the target compressor frequency range, and when the low temperature range reaches a first preset duration, the boiler is allowed to start for auxiliary heating.

8. The integrated energy system heating joint control method according to any one of claims 3-6, characterized in that, The multiple operating condition parameters also include the current operating temperature, the target heat pump operating condition range also includes the target compressor frequency range, and the target linkage control strategy is a low-power linkage heating control strategy or an energy-saving linkage heating control strategy. The step of controlling the integrated energy system to provide heating according to the target heating control strategy includes: If the target heating control strategy is a low-power linkage heating control strategy or an energy-saving linkage heating control strategy, then the target temperature range is matched in the current multiple temperature gradient ranges according to the current operating temperature. When the target temperature range includes load limiting conditions, the smaller frequency between the load limiting frequency corresponding to the load limiting conditions and the upper limit frequency of the target compressor frequency range is determined as the target limiting frequency, and the operating frequency of the heat pump is controlled to not exceed the target limiting frequency for heating.

9. The integrated energy system heating joint control method according to claim 1, characterized in that, The integrated energy system includes multiple heat pumps; The step of determining the target heat pump operating condition range based on the multiple operating condition parameters in a preset heat pump performance monitoring table, and obtaining the target optimal COP value corresponding to the target heat pump operating condition range, includes: Based on the multiple operating condition parameters, determine the maximum conversion rate of each heat pump under the current operating condition in the heat pump performance monitoring table corresponding to each heat pump; Based on the maximum conversion rates corresponding to multiple heat pumps, a reference value for the centralized control conversion rate is determined, and the target operating frequency range corresponding to the reference value for the centralized control conversion rate is obtained.

10. The integrated energy system heating joint control method according to claim 9, characterized in that, The step of determining the centralized control conversion rate reference value based on the maximum conversion rate corresponding to multiple heat pumps, and obtaining the target operating frequency range corresponding to the centralized control conversion rate reference value, includes: The median of the maximum conversion rate is determined based on the maximum conversion rates corresponding to multiple heat pumps, and the median of the maximum conversion rate is determined as the reference value for the centralized control conversion rate; The target operating frequency range is determined in the heat pump performance monitoring table based on the central control conversion rate reference value.

11. A combined heating control device for an integrated energy system, characterized in that, Applied to an integrated energy system, the integrated energy system includes at least two types of heating equipment: a heat pump and a boiler. The integrated energy system heating and cooling joint control device includes: The acquisition module is used to acquire the current electricity price, natural gas price, and multiple operating condition parameters, wherein the multiple operating condition parameters include at least the current ambient temperature; The first determining module is used to determine the cost balance point for generating unit heat between the heat pump and the boiler based on the current electricity price and the natural gas price, and to obtain the balance point COP value corresponding to the heat pump. The second determining module is used to determine the target heat pump operating condition range in a preset heat pump performance monitoring table based on the multiple operating condition parameters, and to obtain the target optimal COP value corresponding to the target heat pump operating condition range. The heating control module is used to control the heating of the integrated energy system based on the current ambient temperature, the target optimal COP value, the equilibrium point COP value, and a preset target heating control strategy table.

12. An integrated energy system, characterized in that, The integrated energy system includes: a memory and at least one processor, wherein the memory stores instructions; The at least one processor invokes the instructions in the memory to cause the integrated energy system to execute the integrated energy system heating joint control method as described in any one of claims 1-10.

13. A computer-readable storage medium storing instructions thereon, characterized in that, When the instruction is read and executed, it performs the integrated energy system heating control method as described in any one of claims 1-10.

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