Heat storage peak regulation system and control method thereof

Abstract

The invention provides a heat storage peak regulation system and a control method thereof, and the system comprises a power grid interface, an industrial heat supply network interface, an energy storage unit, a first heat exchanger, a turbonator, a second heat exchanger, a steam supply unit, a hot kerosene circulation unit, a regional heating pipe network, an absorption heat pump, a heat energy supply unit, an ORC (Organic Rankine Cycle) power generation unit and a control unit. According to the technical scheme, gradient utilization of heat energy can be achieved through heat storage buffering and multi-stage heat energy recovery. The heat energy utilization rate is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage and energy technology, and in particular to a heat storage peak-shaving system and a control method and storage medium thereof. Background Art

[0002] In related technologies, after releasing heat to generate electricity, the low-temperature molten salt in molten salt storage peak-shaving systems returns directly to the cold tank, leaving the medium- and low-temperature waste heat unused. Furthermore, the thermal storage peak-shaving system used by the generator set is poorly coupled with other energy usage scenarios, resulting in low energy utilization. Summary of the Invention

[0003] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] In the first aspect, the present application proposes a heat storage peak-shaving system, which includes: a power grid interface, an industrial heating network interface, an energy storage unit, a first heat exchanger, a steam turbine generator, a second heat exchanger, a steam supply unit, a thermal kerosene circulation unit, a regional heating network, an absorption heat pump, a thermal energy supply unit, an organic Rankine cycle (ORC) power generation unit, and a control unit; wherein, the power grid interface is connected to the steam turbine generator, and the industrial heating network interface is respectively connected to the steam supply unit and the energy storage unit; the first heat exchanger is connected to the steam turbine generator; the second heat exchanger is respectively connected to the steam supply unit and the thermal kerosene circulation unit, and the heat The kerosene circulation unit is connected to the district heating network; the absorption heat pump is connected to the heat energy supply unit and the ORC power generation unit respectively; the energy storage unit, the first heat exchanger, the second heat exchanger and the absorption heat pump are connected in sequence through heat exchange pipes. After the heat exchange medium in the heat exchange pipe is heated by the energy storage unit, it flows through the energy storage unit, the first heat exchanger, the second heat exchanger and the absorption heat pump in sequence and flows back to the energy storage unit; the energy storage unit is connected to the district heating network; the control unit is used to control the heat storage peak-shaving system based on the peak-shaving demand of the power grid and the industrial heat load.

[0005] In one implementation, the energy storage unit includes a hot water storage tank and a phase change heat storage tank. The exhaust steam of the steam turbine generator is used to heat water in the hot water storage tank, which is connected to the industrial heating network interface and the phase change heat storage tank. The phase change heat storage tank is connected to the second heat exchanger and the first heat exchanger respectively.

[0006] In one implementation, the first heat exchanger is connected to the steam turbine generator via a steam reheat circuit.

[0007] In one implementation, the system further includes a civil heating network interface, which is connected to the district heating network.

[0008] In one implementation, the first heat exchanger is a plate heat exchanger group, and the second heat exchanger is a nickel-based alloy shell and tube heat exchanger.

[0009] In one implementation, the control unit is specifically used to: in response to the ratio of the power demanded by the power grid for peak shaving to the rated power of the power grid generator set being greater than a preset threshold, control the steam turbine generator to operate at maximum power; or, in response to the ratio of the power demanded by the power grid for peak shaving to the rated power of the power grid generator set being less than the preset threshold, and the temperature of the industrial heat demand being greater than a temperature threshold, start the steam supply unit and stop the operation of the absorption heat pump.

[0010] In the second aspect, the present application proposes a control method for a heat storage peak-shaving system, characterized in that the method is applied to the system as described in the first aspect, and the method includes: obtaining information based on the peak-shaving demand of the power grid and the industrial heat load; in response to the ratio of the power grid peak-shaving demand power to the rated power of the power grid generator set being greater than a preset threshold, controlling the steam turbine generator to operate at maximum power; or, in response to the ratio of the power grid peak-shaving demand power to the rated power of the power grid generator set being less than the preset threshold, and the temperature of the industrial heat demand being greater than the temperature threshold, starting the steam supply unit and stopping the operation of the absorption heat pump.

[0011] In a third aspect, the present application proposes a computer-readable storage medium for storing instructions, which, when executed, enables the method described in the first aspect to be implemented.

[0012] In a fourth aspect, the present application proposes a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the heat storage peak-shaving system as described in the first aspect.

[0013] The heat storage peak-shaving system and its control method and storage medium provided in this application can achieve cascade utilization of heat energy through heat storage buffering and multi-stage heat energy recovery, thereby improving heat energy utilization efficiency.

[0014] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0016] Figure 1 This is a structural diagram of a heat storage peak-shaving system provided in an embodiment of the present application;

[0017] Figure 2 1 is a flow chart of a control method for a heat storage peak-shaving system provided in an embodiment of the present application;

[0018] Figure 3 It is a flow chart of a heat energy distribution control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0020] It should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0021] The following describes the heat storage peak-shaving system and its control method in accordance with an embodiment of the present application with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the structure of a heat storage peak regulation system provided in an embodiment of the present application. Figure 1As shown, the system may include: a power grid interface 101, an industrial heating network interface 102, a heat storage buffer unit 103, a first heat exchanger 104, a steam turbine generator 105, a second heat exchanger 106, a steam supply unit 107, a hot kerosene circulation unit 108, a district heating network 109, an absorption heat pump 110, a heat energy supply unit 111, an ORC power generation unit 112 and a control unit 113; wherein the power grid interface 101 is connected to the steam turbine generator 105, the industrial heating network interface 102 is respectively connected to the steam supply unit 107 and the heat storage buffer unit 103; the first heat exchanger 104 is connected to the steam turbine generator 105; the second heat exchanger 106 is respectively connected to the steam supply unit 107 and the hot kerosene circulation unit 108, and the hot kerosene circulation unit 111 is connected to the steam turbine generator 105. 08 is connected to the district heating network 109; the absorption heat pump 110 is connected to the heat energy supply unit 111 and the ORC power generation unit 112 respectively; the heat storage buffer unit 103, the first heat exchanger 104, the second heat exchanger 106 and the absorption heat pump 110 are connected in sequence through heat exchange pipes, and the heat exchange medium in the heat exchange pipe is heated by the heat storage buffer unit 103, and then flows through the heat storage buffer unit 103, the first heat exchanger 104, the second heat exchanger 106 and the absorption heat pump 110 in sequence, and flows back to the heat storage buffer unit 103; the heat storage buffer unit 103 is connected to the district heating network 109; the control unit 113 is used to control the heat storage peak-shaving system based on the peak-shaving demand of the power grid and / or the industrial heat load.

[0023] For example, the first heat exchanger 104 and the steam turbine generator 105 can form a high-temperature heat energy recovery section. The heat in the heat storage buffer unit 103 can be released through the first heat exchanger 104 to generate high-temperature steam to drive the steam turbine generator 105 to generate electricity. The electricity generated by the steam turbine generator 105 can be directly supplied to industrial generation or input into the power grid.

[0024] In an optional implementation, the first heat exchanger 104 is connected to the steam turbine generator 105 via a steam reheat circuit.

[0025] For example, the high-temperature steam generated by the second heat exchanger 106 may pass through a steam reheat circuit to increase the temperature of the high-temperature steam, thereby improving power generation efficiency.

[0026] For example, the second heat exchanger 106, the steam supply unit 107, the hot kerosene circulation unit 108 and the district heating network 109 can form a medium-temperature heat energy recovery unit. The heat exchange medium flows out of the first heat exchanger 104 and flows into the second heat exchanger 106 to release heat again, partially generating medium-pressure steam to supply the industrial process, and when the preset conditions are met, part of the heat is introduced into the hot oil circulation system to transport the waste heat to the district heating network 109.

[0027] For example, the absorption heat pump 110 and the ORC power generation system can form a low-temperature heat energy recovery section. The heat exchange medium flows out of the second heat exchanger 106 and flows into the absorption heat pump 110. The absorption heat pump 110 converts part of the waste heat of the heat exchange medium into domestic hot water, and introduces another part of the waste heat into the low-temperature ORC power generation unit 112 for power generation.

[0028] In one implementation, the surface of the heat exchanger tube bundle is sprayed with an Al2O3-TiO2 composite coating with a thickness of 50-100 μm.

[0029] In one implementation, the heat pump absorber includes two-stage absorption heat pumps 110 (LiBr-H2O and NH3-H2O) connected in series, which can use the waste heat of molten salt to generate medium-temperature steam.

[0030] In one implementation, the industrial heating network interface 102 supports dual-medium output of 2.5 MPa / 300°C steam and thermal oil.

[0031] In one implementation, the grid interface 101 is a 10kV / 35kV grid connection point, supporting island operation and black start.

[0032] In one implementation, the heat storage buffer unit 103 includes a hot water heat storage tank and a phase change heat storage tank. The exhaust steam of the steam turbine generator 105 is used to heat the water in the hot water heat storage tank. The industrial heating network interface 102 is connected to the phase change heat storage tank, and the phase change heat storage tank is connected to the first heat exchanger 104 and the second heat exchanger 106 respectively.

[0033] Exemplarily, the heat storage medium of the phase change heat storage tank is a paraffin-based phase change material (latent heat ≥ 200 kJ / kg), and the phase change heat storage tank is connected to the industrial heat network interface 102, so that the industrial heat fluctuation load can be stored.

[0034] In one implementation, the system further includes a civil heating network interface 114 , which is connected to the district heating network 109 .

[0035] For example, the district heating network 109 is connected to the civil heating network interface 114 , so that the preheating of the civil heating network can be used for district heating.

[0036] In one implementation, the first heat exchanger 104 is a plate heat exchanger assembly, and the second heat exchanger 106 is a nickel-based alloy shell and tube heat exchanger.

[0037] In one implementation, the control unit 113 is specifically used to: in response to the ratio of the grid peak-shaving demand power to the grid generator set rated power being greater than a preset threshold, control the steam turbine generator 105 to operate at maximum power; or, in response to the ratio of the grid peak-shaving demand power to the grid generator set rated power being less than the preset threshold, and the temperature of the industrial heat demand being greater than the temperature threshold, start the steam supply unit 107 and stop the operation of the absorption heat pump 110.

[0038] For example, if the grid peak load demand is greater than fifty percent of the grid generator rated power, the control unit 113 will control the energy storage system to prioritize power generation, improve the operating efficiency of the steam turbine generator 105, and store waste heat in the energy storage device.

[0039] For example, if the industrial heat demand is greater than 200° C., the steam supply unit 107 directly supplies steam and uses the ORC power generation unit 112 to assist in heat supply.

[0040] In an optional implementation, various parts of the heat storage system exchange heat through heat exchange pipes, using molten salt as the heat exchange medium. A nano-aerogel insulation layer is set on the molten salt pipes and the outer walls of the storage tank to ensure that the temperature of the low-temperature molten salt is higher than the temperature threshold.

[0041] Optionally, 0.5-1.5% of NaNO2 antioxidant is added to the molten salt, and the Cl- concentration is ≤100 ppm.

[0042] In an optional implementation, a nano-aerogel insulation layer is provided on the heat exchange pipe, the phase change heat storage tank, and the outer wall of the storage tank to ensure that the temperature of the low-temperature molten salt is greater than a preset temperature threshold.

[0043] Exemplarily, the thermal conductivity of the nano-aerogel insulation layer is ≤0.023 W / m·K) to ensure that the temperature of the low-temperature molten salt is ≥180°C.

[0044] In an optional implementation, a nano-aerogel insulation layer is provided on the heat exchange pipe, the phase change heat storage tank, and the outer wall of the storage tank to ensure that the temperature of the low-temperature molten salt is greater than the temperature threshold.

[0045] In an optional implementation, an electric heating system is embedded in the heat exchange pipe. When the molten salt flow rate is less than the flow rate threshold, the control unit 113 controls the start-up of the electric heating system to maintain the pipe temperature greater than or equal to the preset temperature threshold.

[0046] Exemplarily, when the molten salt flow rate is less than 0.6 m / s, the control unit 113 starts the electric heating system to maintain the pipeline temperature ≥ 200°C.

[0047] In an optional implementation, the heat exchange pipeline is provided with a distributed optical fiber leakage monitoring subsystem to monitor whether the heat exchange pipeline leaks.

[0048] In some embodiments, real-time data can be used: grid peak demand, industrial heat load, district heating temperature, molten salt flow (800-2000m 3 / h).

[0049] In one implementation, data such as grid peak-shaving demand, industrial heat load, weather forecast data, and electricity price curves can be used as input, and an optimization algorithm can be used to distribute heat energy with the goal of maximizing profits, thereby achieving efficient and economical operation of the energy system.

[0050] Alternatively, the above benefits can be expressed as:

[0051] Total revenue = power generation × electricity price + heat supply × heat price - equipment energy consumption cost

[0052] In some embodiments, an enthalpy analyzer can be set in the system to calculate the enthalpy of each heat exchange node at a preset time. Efficiency, based on Efficiency automatically optimizes molten salt flow distribution and heat pump operating parameters, and generates energy efficiency reports.

[0053] In one implementation, the control unit 113 may employ feedforward-PID composite control to dynamically set the heating water temperature of the district heating network 109 based on the outdoor temperature. For example, when the outdoor temperature is -10°C, the heating water temperature may be set to 85°C; when the outdoor temperature is 10°C, the heating water temperature may be set to 60°C.

[0054] In one implementation, the control unit 113 can adjust the molten salt flow rate (± 200m 3 / h) and heat exchanger valve opening (0-100%), and control steam temperature fluctuation ≤±5℃.

[0055] The peak shaving system provided by this application is explained in detail below with reference to specific embodiments:

[0056] Taking the heat storage peak-shaving system coupled with a 300MW coal-fired unit as an example, the molten salt heat storage capacity is 1200MWh (double tank structure, high temperature tank 565℃ / low temperature tank 180℃); the high temperature heat energy recovery section includes a 540℃ / 12MPa steam generator with a power generation capacity of 80MW; the medium temperature heat energy recovery section gas supply unit can generate 300℃ steam to supply the chemical plant with a heating capacity of 50MW; the low temperature heat energy recovery section includes an absorption heat pump (COP=2.0) and a 5MW ORC power generation unit. The heat storage buffer unit includes a paraffin / graphene composite phase change heat storage tank with a capacity of 2000m 3 The hot water storage tank is equipped with a dual temperature zone of 95℃ / 60℃ and a capacity of 1500m 3 .

[0057] During peak electricity consumption periods, priority is given to meeting the grid's peak-shaving needs. 90% of the molten salt heat is used for power generation, and 10% is stored in the phase change tank. The ORC system operates at full load, supplementing the grid power by 5MW.

[0058] During periods of low electricity consumption, 60% of the molten salt heat is used for industrial steam supply, 30% is used for district heating, and 10% drives ORC power generation; the heat pump system raises the 150°C molten salt waste heat to 200°C to supply the chemical plant's distillation process.

[0059] The system of the embodiment of the present application can realize the cascade utilization of thermal energy through heat storage buffering and multi-stage heat energy recovery, thereby improving the thermal energy utilization rate.

[0060] See Figure 2 , Figure 2 This is a flow chart of a control method for a heat storage peak-shaving system provided in an embodiment of the present application. This method can be applied to the heat storage peak-shaving system of any embodiment of the present application. Figure 2 As shown, the method may include but is not limited to the following steps:

[0061] Step S201: Obtaining the peak-shaving demand of the power grid and the industrial heat load.

[0062] Step S202: In response to the ratio of the power demand for peak shaving of the power grid to the rated power of the power grid generator set being greater than a preset threshold, the steam turbine generator is controlled to operate at maximum power; or, in response to the ratio of the power demand for peak shaving of the power grid to the rated power of the power grid generator set being less than a preset threshold, and the temperature of the industrial heat demand being greater than a temperature threshold, the steam supply unit is started and the operation of the absorption heat pump is stopped.

[0063] It should be noted that the above explanation of the embodiment of the heat storage peak-shaving system is also applicable to the control method of the heat storage peak-shaving system of this embodiment, and will not be repeated here.

[0064] See Figure 3 , Figure 3 It is a flow chart of a heat energy distribution control method provided in an embodiment of the present application.

[0065] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0066] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0067] In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a way to describe the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0068] In the descriptions of the foregoing embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0070] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0071] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0072] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0073] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0074] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0075] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A heat storage peak shaving system, characterized in that: include: Grid interface, industrial heating network interface, energy storage unit, first heat exchanger, steam turbine generator, second heat exchanger, steam supply unit, thermal kerosene circulation unit, district heating network, absorption heat pump, heat energy supply unit, organic Rankine cycle ORC power generation unit and control unit; among them, The grid interface is connected to the steam turbine generator, and the industrial heating network interface is connected to the steam supply unit and the energy storage unit respectively; The first heat exchanger is connected to the steam turbine generator; The second heat exchanger is connected to the steam supply unit and the hot kerosene circulation unit respectively, and the hot kerosene circulation unit is connected to the district heating network; The absorption heat pump is connected to the heat energy supply unit and the ORC power generation unit respectively; The energy storage unit, the first heat exchanger, the second heat exchanger, and the absorption heat pump are sequentially connected via a heat exchange pipe. After the heat exchange medium in the heat exchange pipe is heated by the energy storage unit, it flows sequentially through the energy storage unit, the first heat exchanger, the second heat exchanger, and the absorption heat pump, and then flows back to the energy storage unit. The energy storage unit is connected to the district heating network; The control unit is used to control the heat storage peak-shaving system based on the peak-shaving demand of the power grid and the industrial heat load.

2. The system according to claim 1, wherein: The energy storage unit includes a hot water storage tank and a phase change heat storage tank. The exhaust steam of the steam turbine generator is used to heat the water in the hot water storage tank, which is connected to the industrial heating network interface and the phase change heat storage tank. The phase change heat storage tank is connected to the second heat exchanger and the first heat exchanger respectively.

3. The system according to claim 1, wherein: The first heat exchanger is connected to the steam turbine generator via a steam reheat circuit.

4. The system according to claim 1, wherein: The system further comprises a civil heating network interface, which is connected to the district heating network.

5. The system according to claim 1, wherein: The first heat exchanger is a plate heat exchanger group, and the second heat exchanger is a nickel-based alloy shell and tube heat exchanger.

6. The system according to claim 1, wherein: The control unit is specifically used for: In response to the ratio of the power demanded by the power grid for peak load regulation to the rated power of the power generator set of the power grid being greater than a preset threshold, controlling the steam turbine generator to operate at maximum power; or, In response to the ratio of the grid peak load demand power to the grid generator set rated power being less than the preset threshold and the temperature of the industrial heat demand being greater than the temperature threshold, the steam supply unit is started and the operation of the absorption heat pump is stopped.

7. A control method for a heat storage peak-shaving system, characterized in that: The method is applied to the system according to any one of claims 1 to 6, and the method includes: Obtain peak load based on power grid demand and industrial heat load; In response to the ratio of the grid peak-shaving demand power to the grid generator set rated power being greater than a preset threshold, the steam turbine generator is controlled to operate at maximum power; or, in response to the ratio of the grid peak-shaving demand power to the grid generator set rated power being less than the preset threshold, and the temperature of the industrial heat demand being greater than a temperature threshold, the steam supply unit is started and the operation of the absorption heat pump is stopped.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to claim 7 when executed by a processor.

9. A computer program product, characterized in that A computer program is included which, when executed by a processor, implements the method according to claim 7.

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