Integrated energy system and planning method thereof

Abstract

The present disclosure provides a comprehensive energy system and a planning method thereof, the system comprising a plurality of energy devices and busbars of different load types; each of the energy devices comprises at least one interface; each of the interfaces determines a corresponding load type according to energy taste difference, and is connected to a busbar corresponding to the load type, realizing conversion of energy grade from high to low and temperature from high to low, and preferentially using high-grade energy for power generation or industrial processes, medium-grade energy for heating, and low-grade energy for refrigeration or waste heat recovery, which can significantly improve the overall energy utilization efficiency of the system. This cascade utilization mode not only maximizes energy waste reduction, but also reduces system operation costs, and has great strategic significance for promoting energy transformation and sustainable development.

Description

Technical Field

[0001] This disclosure relates to the energy sector, and more particularly to an integrated energy system and its planning methodology. Background Technology

[0002] An integrated energy system is an advanced energy supply model that achieves unified planning, dispatch, and optimization of energy by coupling and coordinating multiple heterogeneous energy sources (such as electricity, heat, cooling, and gas). It breaks down the barriers of traditional energy systems, which are often fragmented and difficult to coordinate. Utilizing advanced physical information technology and intelligent management methods, it tightly interconnects energy production, transmission, storage, and consumption into an organic whole. This system aims to significantly improve overall energy utilization efficiency, enhance system flexibility and reliability, and provide crucial support for the absorption of renewable energy through complementary conversion and coordinated supply of different energy forms. It is an important technological pathway for promoting a clean and low-carbon transformation in the energy sector.

[0003] However, existing planning methods for integrated energy systems fail to reflect the low-carbon and high-efficiency advantages of integrated energy systems. Summary of the Invention

[0004] The technical problem to be solved by this disclosure is the deficiency in the prior art that cannot reflect the advantages of low carbon and high efficiency of integrated energy systems, and provides an integrated energy system and its planning method.

[0005] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0006] In a first aspect, this disclosure provides an integrated energy system, the system comprising multiple energy devices and busbars of different load types;

[0007] Each of the energy devices includes at least one interface; each interface determines the corresponding load type based on the difference in energy quality and is connected to the bus corresponding to the load type.

[0008] Optionally, the energy equipment includes energy production equipment;

[0009] The energy production equipment includes one or more of photovoltaics, solar water heaters, and wind turbines. The total power generation of the photovoltaics and wind turbines in the energy production equipment is set within a first preset range. The upper limit of the first preset range is the product of the total number of photovoltaics and wind turbines installed and the unit power generation, and the lower limit of the first preset range is the product of the total number of photovoltaics and wind turbines installed - 1 and the unit power generation.

[0010] Optionally, the energy device includes an energy conversion device;

[0011] The energy conversion equipment includes one or more of the following: cogeneration unit, heat pump, electric boiler, gas boiler, absorption chiller, electric chiller, heat exchanger, and solar water heater. The total operating power of the energy conversion equipment is set within a second preset range. The upper limit of the second preset range is the product of the total number of energy conversion equipment installed and the unit operating power, and the lower limit of the second preset range is the product of the total number of energy conversion equipment installed - 1 and the unit operating power.

[0012] Optionally, the output energy of the energy conversion device is equal to the input energy consumed multiplied by the operating efficiency of the energy conversion device.

[0013] Optionally, the load type includes electrical load, cooling load, and hot water load;

[0014] The hot water load includes steam load, 90℃ hot water load, 60℃ hot water load and 40℃ hot water load, and the busbars corresponding to the hot water loads of adjacent load types are connected by heat exchangers.

[0015] Optionally, the heat released by the hot fluid in the heat exchanger is the same as the heat absorbed by the cold fluid.

[0016] Optionally, the heat consumption and heat generation in the heat exchanger satisfy an efficiency relationship.

[0017] Optionally, the heat generated by the bus corresponding to the hot water load of the previous load type is equal to the sum of the heat demanded by the user on the bus corresponding to the hot water load of the current load type and the heat input to the bus corresponding to the hot water load of the next load type.

[0018] Optionally, the system optimizes the number of energy devices to be installed with the goal of minimizing overall operating costs.

[0019] Secondly, this disclosure provides a planning method for an integrated energy system, the method comprising:

[0020] The system acquires multiple energy devices and buses of different load types; each energy device includes at least one interface;

[0021] The corresponding load type is determined based on the energy quality difference of each interface, and each interface is connected to the bus corresponding to the load type.

[0022] Thirdly, this disclosure provides an electronic device including a processor and a memory, the memory storing at least one instruction or at least one program, the at least one instruction or at least one program being loaded and executed by the processor to implement a planning method for an integrated energy system as described in any of the second aspects.

[0023] Fourthly, this disclosure provides a computer-readable storage medium storing at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, at least one program, code set, or instruction set is loaded and executed by a processor to implement a planning method for an integrated energy system as described in any of the first aspects.

[0024] Fifthly, according to an embodiment of the present disclosure, a computer program product includes a computer program that, when executed by a processor, implements a planning method for an integrated energy system for a water-using device as described in any of the first aspects.

[0025] The positive and progressive effects of this disclosure are as follows:

[0026] This disclosure allows for the connection of various energy devices in an integrated energy system to different buses based on their energy grade differences and corresponding load types. By setting up different buses according to different load demands and matching energy devices to appropriate buses based on the energy grade differences at their interfaces, an integrated energy system is obtained. This system achieves a conversion of energy grade and temperature from high to low, prioritizing the use of high-grade energy for power generation or industrial processes, medium-grade energy for heating, and low-grade energy for cooling or waste heat recovery, significantly improving the overall energy utilization efficiency of the system. This tiered utilization model not only minimizes energy waste but also reduces system operating costs, holding significant strategic importance for promoting energy transition and sustainable development.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0028] Figure 1 A block diagram of an integrated energy system provided for an exemplary embodiment of this disclosure;

[0029] Figure 2 A flowchart of an integrated energy system planning provided as an exemplary embodiment of this disclosure;

[0030] Figure 3 A structural diagram of an electronic device provided for an exemplary embodiment of this disclosure. Detailed Implementation

[0031] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure 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 of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that includes 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 devices.

[0033] In integrated energy systems, the management and utilization of energy grade are essential means to improve the overall efficiency of the system. Energy grade refers to the quality or availability of energy. High-quality energy has a strong ability to perform work and is called high-grade energy. For example, mechanical energy and electrical energy can be completely converted into work and belong to high-grade energy. Conversely, low-quality energy has a weak ability to perform work and is called low-grade energy. For example, thermal energy can only partially perform work and can only be partially converted into work, belonging to low-grade energy.

[0034] Energy quality is generally related to temperature—high-temperature energy has a high quality, and low-temperature energy has a low quality. Based on the second law of thermodynamics, the greater the difference in energy quality, the higher the losses during energy conversion. Current technologies typically use only one heat load bus, one electrical load bus, and one cold load bus in energy systems. This configuration ignores the differences in energy quality and conflates high-temperature and low-temperature heat demands. In fact, high-temperature heat has a much higher quality than low-temperature heat. During conversion, high-temperature heat can be transferred to low-temperature heat through a heat exchanger, but the reverse is not possible. Furthermore, different heat-generating equipment produces heat at different temperatures. For example, boilers can produce high-temperature steam, but their efficiency is less than 1, while heat pumps generally only produce 40-50℃ hot water, but their COP efficiency exceeds 2. If a single bus is used for planning, heat pumps will be prioritized. However, the resulting system cannot meet the demand for steam, making the planning unrealistic and requiring manual adjustments.

[0035] The following describes an exemplary embodiment of the present disclosure providing an integrated energy system, see [link to example]. Figure 1 The system includes multiple energy devices and buses for different load types. Each energy device includes at least one interface; each interface determines the corresponding load type based on energy quality differences and connects to the bus corresponding to that load type.

[0036] Specifically, such as Figure 1As shown, energy equipment may include energy production equipment and energy conversion equipment. The energy production equipment includes one or more of photovoltaic, solar water heaters, and wind turbines. The energy conversion equipment includes one or more of combined heat and power (CHP) units, heat pumps, electric boilers, gas boilers, absorption chillers, electric chillers, heat exchangers, and solar water heaters. Different load types include electrical load, cooling load, and hot water load. The hot water load includes steam load, 90℃ hot water load, 60℃ hot water load, and 40℃ hot water load. The busbars corresponding to the hot water loads of adjacent load types are connected via heat exchangers. Figure 1 The direction indicated by the middle arrow represents the direction of energy transfer. Additionally, in some application scenarios, integrated energy systems also include external energy sources, such as the external power grid and natural gas network. It should be noted that... Figure 1 This is merely an example. Those skilled in the art can freely add or remove the configuration of energy equipment and busbars based on this embodiment, but the overall logic does not depart from the framework of this embodiment.

[0037] For example, an external power grid, batteries, wind turbines, photovoltaic systems, and heat pumps are connected to an electrical load bus. The electrical load bus is used to transmit electrical energy. Besides receiving electrical energy generated by energy devices such as the external power grid, batteries, wind turbines, and photovoltaic systems, it can also supply electrical energy to energy devices within the integrated energy system that have electrical load requirements (such as electric chillers, batteries, and electric pumps). Additionally, the electrical load bus is also used to supply electrical energy to users' electrical load demands.

[0038] For example, a natural gas grid, gas-fired boilers, and combined heat and power (CHP) units are connected to a natural gas load bus. The natural gas load bus is used to transmit natural gas energy; it receives natural gas energy generated by the natural gas grid and supplies natural gas energy to the gas-fired boilers and CHP units.

[0039] For example, the absorption chiller, electric chiller, and heat pump are connected to the cooling load bus, which is used to transfer cooling energy. The cooling load bus receives the cooling energy generated by the absorption chiller, electric chiller, and heat pump and supplies cooling energy to the user's cooling load demand.

[0040] For example, electric boilers, absorption chillers, gas-fired boilers, and combined heat and power (CHP) units are connected to a steam load bus. The steam load bus is used to transfer steam energy, receiving steam energy from the electric boilers, gas-fired boilers, and CHP units, and supplying steam energy to the absorption chillers. Additionally, the steam load bus is also used to supply steam energy to the steam load demand of users.

[0041] For example, the 90°C hot water load bus is connected to the steam load bus via a heat exchanger. The 90°C hot water load bus is used to transmit 90°C hot water energy. The 90°C hot water load bus receives 90°C hot water energy converted by the steam load bus and supplies 90°C hot water energy to the user's 90°C hot water load demand.

[0042] For example, the heat pump is connected to a 60°C hot water load bus, which is also connected to a 90°C hot water load bus via a heat exchanger. The 60°C hot water load bus is used to transmit 60°C hot water energy. The 60°C hot water load bus receives the 60°C hot water energy transmitted by the heat pump and the 90°C hot water load bus, and supplies 60°C hot water energy to the user's 60°C hot water load demand.

[0043] For example, the solar water heater is connected to a 40°C hot water load bus, which is also connected to a 60°C hot water load bus via a heat exchanger. The 40°C hot water load bus is used to transmit 40°C hot water energy. The 40°C hot water load bus receives the 40°C hot water energy transmitted by the solar water heater and the 60°C hot water load bus, and supplies 40°C hot water energy to the user's 40°C hot water load demand.

[0044] In this embodiment, each energy device in the integrated energy system can be connected to different buses according to the load type determined by the differences in energy quality. Multiple buses are constructed based on different load demands, such as an electrical load bus, a cooling load bus, a steam load bus, a 90℃ hot water load bus, a 60℃ hot water load bus, and a 40℃ hot water load bus. The energy devices are matched and connected to appropriate buses according to the energy quality differences of their interfaces, resulting in an integrated energy system. This system achieves a conversion from high to low energy quality and temperature, prioritizing the use of high-grade energy for power generation or industrial processes, medium-grade energy for heating, and low-grade energy for cooling or waste heat recovery, significantly improving the overall energy utilization efficiency of the system. This tiered utilization model not only minimizes energy waste but also reduces system operating costs, which is of great strategic significance for promoting energy transition and sustainable development.

[0045] In one embodiment, in order to fully realize the configuration of various energy devices in the integrated energy system of this embodiment, improve energy utilization and enhance the planning efficiency of the integrated energy devices, the energy devices in the integrated energy system need to meet multiple constraints such as equipment output constraints, heat exchanger cascade utilization constraints, and multi-bus energy balance constraints. The following details these constraints:

[0046] Equipment output constraints include renewable energy power generation constraints (wind power, photovoltaic): the actual power generation of wind turbines or photovoltaic equipment is limited by the number of installed units, which can be understood as an integer programming constraint to ensure that the planned number of installed units can meet the actual power output requirements. Specifically, the total power generation of the photovoltaic and wind turbines in the energy production equipment is set within a first preset range; the upper limit of the first preset range is the product of the total number of installed photovoltaic and wind turbines and the unit power generation, and the lower limit of the first preset range is the product of the total number of installed photovoltaic and wind turbines - 1 and the unit power generation, as shown in the following formula:

[0047]

[0048] in, For wind turbine units, For photovoltaics, This represents the total number of wind turbine and solar panels installed. This represents the total power generation from wind turbines and solar power. This refers to the unit power generation of wind turbines and photovoltaic systems.

[0049] For example, a user's electricity load demand is 450 kW, and the unit power generation of a wind turbine (assuming the integrated energy system only has wind turbines) is 100 kW. If there are 4 wind turbines, the total power generation is only 400 kW, which is insufficient to meet the user's demand. If there are 5 wind turbines, the total power generation is 500 kW, resulting in redundant power. This is based on the constraint on the right-hand side of the above formula. Get 450≤ ×100, At least 4.5 units, according to the constraint on the left side of the above formula. get( -1)×100≤45, At least 5.5 units. Also, based on the constraints on the left and right sides, 4.5... 5.5, because the number of units must be an integer, the number of wind turbine units is 5.

[0050] Equipment output constraints include power constraints for energy conversion equipment (combined heat and power units, electric boilers, gas boilers, absorption chillers, etc.): the actual operating power of the energy conversion equipment needs to be limited by the number of installed units to ensure that the planned number of installed units can meet the actual power output requirements. Specifically, the total operating power of the energy conversion equipment is set within a second preset range; the upper limit of the second preset range is the product of the total number of installed energy conversion equipment and the unit operating power, and the lower limit of the second preset range is the product of the total number of installed energy conversion equipment - 1 and the unit operating power. The operating power includes, but is not limited to, electricity generation, heat generation, and cooling capacity, as shown in the following formula:

[0051]

[0052] Among them, ECE stands for Energy Conversion Equipment, CHP for Combined Heat and Power (CHP) Unit, EB for Electric Boiler, HP for Electric Heat Pump, GB for Gas Boiler, and AC for Absorption Chiller. The number of each energy conversion device installed; The unit operating power of each energy conversion device, The total power output of the energy conversion equipment. The total heat generated in the energy conversion equipment. This refers to the total cooling capacity of the energy conversion equipment.

[0053] Equipment output constraints include energy conversion efficiency constraints: the output energy (heat, cooling, or electricity) of energy conversion equipment is equal to the input energy (electrical or natural gas energy) it consumes multiplied by the equipment's operating efficiency. Specifically, it is shown in the following formula:

[0054]

[0055] in, To improve the operating efficiency of each energy conversion device; The electrical energy consumed by various energy conversion devices. The natural gas energy consumed by various energy conversion devices.

[0056] The constraints on the cascade utilization of heat exchangers include the heat balance constraints: following the thermodynamic law of energy conservation, the heat released by the hot fluid in each heat exchanger is the same as the heat absorbed by the cold fluid. Specifically, this can be obtained from the mass flow rate, specific heat capacity, and inflow and outflow temperatures of the fluids in each heat exchanger, as shown in the following formula:

[0057]

[0058] in, and These are the fluid mass flow rates at the inlet and outlet of each heat exchanger, respectively. and These are the average isobaric specific heat capacities of the hot and cold fluids in each heat exchanger; and These are the inflow and outflow temperatures of the hot fluid in the heat exchanger, respectively. and These are the inflow and outflow temperatures of the cold fluid in the heat exchanger, respectively.

[0059] The constraints of heat exchanger cascade utilization include heat exchange efficiency constraints: for bus loads with different energy grades, such as steam load, 90℃ hot water load, 60℃ hot water load, and 40℃ hot water load, the heat loss (input end) and heat generation (output end) during the heat exchange process must satisfy an efficiency relationship. That is, when high-grade energy is converted to low-grade energy, there is an energy loss determined by the heat exchange efficiency, as shown in the following equation:

[0060]

[0061] in, and These represent the heat loss and heat generation of the heat exchanger between the steam load bus and the 90℃ hot water load bus, respectively. and The heat consumption and heat generation of the heat exchangers between the 90℃ hot water load bus and the 60℃ hot water load bus are respectively. and The heat consumption and heat generation of the heat exchangers between the 60℃ hot water load bus and the 40℃ hot water load bus are respectively. The heat exchange efficiency of the heat exchanger between the steam load bus and the 90℃ hot water load bus. The heat exchange efficiency of the heat exchanger between the 90℃ hot water load bus and the 60℃ hot water load bus. The heat exchange efficiencies are those of the heat exchangers between the 60℃ hot water load bus and the 40℃ hot water load bus, respectively.

[0062] Multi-bus energy balance constraints require that energy buses at each grade level must maintain a balance between supply and demand, with heat energy flowing sequentially from highest to lowest grade (steam -> 90℃ -> 60℃ -> 40℃). Specifically, the heat output of the bus corresponding to the hot water load of the previous load type is equal to the sum of the heat demanded by the user on the bus corresponding to the hot water load of the current load type and the heat input to the bus corresponding to the hot water load of the next load type, as shown in the following formula:

[0063]

[0064] in, For the heat generated by the combined heat and power unit, For the heat generated by the electric boiler, The heat generated by the gas-fired boiler, The heat required by the user's steam load. This represents the heat required for a 90℃ hot water load at the user end. This represents the heat required for a 60℃ hot water load at the user end. This represents the heat required for a 40℃ hot water load at the user end. and These represent the heat input and heat output stored in the water storage tank, respectively.

[0065] In one embodiment, based on the above constraints, the system can further optimize the number of energy devices installed with the goal of minimizing overall operating costs, thereby obtaining the final configuration of the integrated energy system. It should be noted that some solutions may not optimize with this goal in mind, but this embodiment only provides an example of optimization. The core of this invention lies in connecting energy devices via buses corresponding to different energy grades.

[0066] The total operating cost package specifically includes the investment and construction costs throughout the project's entire life cycle. and the project's annual maintenance and operating costs Among them, the total investment and construction cost throughout the project's life cycle. The project's civil engineering costs, pipeline costs, equipment installation fees, revenue from heating and cooling load connections, and annual maintenance and operating costs need to be considered. The costs of purchased energy, equipment maintenance, revenue from selling electricity to the grid, and revenue from selling cooling and heating to users need to be considered, as shown in the following formula:

[0067]

[0068] in, For equipment residual value, if the equipment's lifespan is longer than the project's lifespan, then it is necessary to calculate the residual value of the equipment's remaining lifespan after the project ends. and These represent the number of energy devices i installed and the operating power of the devices, respectively. and These represent the unit installation cost and unit maintenance cost of energy device i, respectively. and The revenue from the connection of cooling load and heating load are respectively. and These are the project's civil engineering costs and pipeline costs, respectively. and The costs of purchasing electricity from external sources and purchasing electricity from external sources starting from that year. The cost of replacing energy equipment is a factor; when the lifespan of the equipment is less than the project's lifespan, it needs to be replaced. , and These are revenues from the sale of cooling, heating, and electricity from the equipment.

[0069] In one embodiment, the specific configuration of the integrated energy system can be obtained based on the multiple constraints and optimization schemes provided in the above embodiments, providing an evaluation method for the integrated energy system. The evaluation method is achieved by calculating comprehensive energy efficiency, reflecting the differences in energy quality, revealing the devaluation and loss of energy within the integrated energy system, and scientifically characterizing the degree of energy utilization. Specifically, it is shown in the following formula:

[0070]

[0071] in, For comprehensive energy efficiency, , and The user load demand consists of electrical load demand, heating load demand, and cooling load demand. and These represent the actual energy stored and released after energy storage losses, respectively. and These represent the actual energy stored and released after heat storage losses, respectively. and These refer to the amounts of electricity and natural gas purchased from external sources. , , and These are the conversion factors for the natural gas bus, electrical load bus, thermal load bus, and cold load bus, respectively.

[0072] The conversion factors for electrical, heat, and cooling loads are key indicators used to assess the type and quantification of energy loads. They aim to comprehensively evaluate the differences in conversion efficiency among different energy forms under environmental constraints. The design of the conversion factors considers the type and state of energy, as well as the influence of ambient temperature. It emphasizes a hierarchical analysis method based on the original form of energy (primary energy) and its processed and converted form (secondary energy) to accurately reflect the actual impact of changes in energy grade on energy utilization efficiency. Since electrical energy does not have grade differences, the conversion factor for the electrical load bus... All are 1.

[0073] Conversion factor for natural gas bus The calculation method is as follows:

[0074]

[0075] in, This indicates the ambient temperature, expressed in Kelvin (K). This indicates the temperature at which natural gas is fully burned, typically taken as 1573.15 K.

[0076] Conversion factor for heat load busbars (including steam load busbar, 90℃ hot water load busbar, 60℃ hot water load busbar, and 40℃ hot water load busbar). The calculation method is as follows:

[0077]

[0078] in, The conversion factors are for the 90℃ hot water load bus, the 60℃ hot water load bus, and the 40℃ hot water load bus. This is the conversion factor for the steam load busbar. and These represent the supply water temperature and the return water temperature, respectively, in Kelvin (K). This represents the saturation temperature corresponding to the steam pressure, expressed in Kelvin (K).

[0079] Conversion factor for cold load bus The calculation method is as follows:

[0080]

[0081] in, The temperature represents the cooling load, expressed in Kelvin (K).

[0082] For example, based on the above optimization scheme, the specific configuration of each energy device in the integrated energy system of this embodiment is as follows:

[0083]

[0084] Next, the integrated energy system is evaluated according to the evaluation method provided in this embodiment. First, the conversion coefficients for each energy grade are calculated, and then the overall comprehensive energy efficiency of the integrated energy system is calculated in one step. The calculation results are shown below:

[0085]

[0086] It can be seen that the higher the energy grade, the larger the conversion factor. Based on the conversion factor decreasing from large to small, tiered energy utilization can save energy and reduce operating costs. Furthermore, the overall energy efficiency of the integrated energy system in this embodiment is 76.02%, while the overall energy efficiency of the integrated energy system planned using the traditional method without employing the multi-energy bus method is 67.56%. Therefore, the integrated energy system in this embodiment can improve energy utilization efficiency.

[0087] In this embodiment, by considering differences in energy grade, a multi-bus architecture is used to construct and optimize the integrated energy system. This allows for the rational planning of the number of different energy devices installed within the system, making the integrated energy system more closely aligned with actual load demands. The interfaces of the energy devices are categorized according to their energy grade, and a multi-bus architecture connects interfaces with the same energy grade to the same bus. This avoids mixing high-grade and low-grade energy and allows for the calculation of losses during the conversion process of different energy grades, resulting in a more accurate integrated energy system and reducing the system's overall lifecycle economic cost. Furthermore, comprehensive energy efficiency evaluation within the integrated energy system reveals energy devaluation and loss, scientifically characterizing the degree of energy utilization.

[0088] The following describes a planning method for an integrated energy system provided by embodiments of this disclosure. Figure 2 This is a flowchart illustrating a planning method for an integrated energy system provided in this disclosure. This specification provides the method operation steps as shown in the embodiments or flowcharts, but based on conventional or non-inventive labor, more or fewer operation steps may be included. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only execution order. In actual system or server product execution, the method can be executed sequentially according to the embodiments or drawings, or in parallel (e.g., in a parallel processor or multi-threaded processing environment). Specifically, as shown... Figure 1 As shown, the method may include:

[0089] S201. Obtain multiple energy devices and buses of different load types in the system.

[0090] Each of the energy devices includes at least one interface.

[0091] S202. Determine the corresponding load type based on the energy quality difference of each interface, and connect each interface to the bus corresponding to the load type.

[0092] In one embodiment, after establishing the connection method of the energy equipment and busbars of the integrated energy system according to steps S201 and S202, the planning method provided in this embodiment can also solve for the configuration of specific energy equipment in the integrated energy system. The energy equipment in the integrated energy system needs to meet multiple constraints, such as equipment output constraints, heat exchanger cascade utilization constraints, and multi-busbar energy balance constraints. These constraints can be referred to in detail in the above embodiments, and will not be repeated in this embodiment. Simultaneously, the number of installed energy equipment is optimized with the goal of minimizing overall operating costs, resulting in the specific configuration of the integrated energy system. The optimization scheme can be referred to in the above embodiments, and will not be repeated in this embodiment.

[0093] This disclosure provides an example embodiment of an electronic device, see [link to example embodiment]. Figure 3 The electronic device includes a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the computer program, it implements the planning method of the integrated energy system described in any of the above embodiments. Figure 3 The electronic device 30 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0094] like Figure 3 As shown, the electronic device 30 can be manifested as a general-purpose computing device, such as a server device. The components of the electronic device 30 may include, but are not limited to: at least one processor 31, at least one memory 32, and a bus 33 connecting different system components (including memory 32 and processor 31).

[0095] Bus 33 includes a data bus, an address bus, and a control bus.

[0096] The memory 32 may include volatile memory, such as random access memory (RAM) 321 and / or cache memory 322, and may further include read-only memory (ROM) 323.

[0097] The memory 32 may also include a program tool 325 (or utility) having a set (at least one) program module 324, such program module 324 including but not limited to: an operating system, one or more application programs, other program modules and program data, each or some combination of these examples may include an implementation of a network environment.

[0098] The processor 31 executes various functional applications and data processing by running computer programs stored in the memory 32, such as the integrated energy system planning method provided in any of the above embodiments.

[0099] Electronic device 30 can also communicate with one or more external devices 34 (e.g., keyboard, pointing device, etc.). This communication can be performed through input / output (I / O) interface 35. Furthermore, electronic device 30 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public network, such as the Internet) via network adapter 36. As shown, network adapter 36 communicates with other modules of electronic device 30 via bus 33. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with electronic device 30, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0100] It should be noted that although several units / modules or sub-units / modules of the electronic device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0101] This disclosure also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the planning method for an integrated energy system provided in any of the above embodiments.

[0102] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.

[0103] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the planning method for the integrated energy system described in any of the preceding embodiments.

[0104] The program code for executing the computer program product of this disclosure can be written in any combination of one or more programming languages, and the program code can be executed entirely on a user device, partially on a user device, as a stand-alone software package, partially on a user device and partially on a remote device, or entirely on a remote device.

[0105] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. An integrated energy system, characterized in that, The system includes multiple energy devices and buses with different load types; Each of the energy devices includes at least one interface; each interface determines the corresponding load type based on the difference in energy quality and is connected to the bus corresponding to the load type.

2. The integrated energy system as described in claim 1, characterized in that, The energy equipment includes energy production equipment; The energy production equipment includes one or more of photovoltaics, solar water heaters, and wind turbines. The total power generation of the photovoltaics and wind turbines in the energy production equipment is set within a first preset range. The upper limit of the first preset range is the product of the total number of photovoltaics and wind turbines installed and the unit power generation, and the lower limit of the first preset range is the product of the total number of photovoltaics and wind turbines installed - 1 and the unit power generation.

3. The integrated energy system as described in claim 1, characterized in that, The energy equipment includes energy conversion equipment; The energy conversion equipment includes one or more of the following: cogeneration unit, heat pump, electric boiler, gas boiler, absorption chiller, electric chiller, heat exchanger, and solar water heater. The total operating power of the energy conversion equipment is set within a second preset range. The upper limit of the second preset range is the product of the total number of energy conversion equipment installed and the unit operating power, and the lower limit of the second preset range is the product of the total number of energy conversion equipment installed - 1 and the unit operating power.

4. The integrated energy system as described in claim 3, characterized in that, The output energy of the energy conversion device is equal to the input energy consumed multiplied by the operating efficiency of the energy conversion device.

5. The integrated energy system as described in claim 1, characterized in that, The load types include electrical load, cooling load, and hot water load; The hot water load includes steam load, 90℃ hot water load, 60℃ hot water load and 40℃ hot water load, and the busbars corresponding to the hot water loads of adjacent load types are connected by heat exchangers.

6. The integrated energy system as described in claim 5, characterized in that, The heat released by the hot fluid in the heat exchanger is the same as the heat absorbed by the cold fluid.

7. The integrated energy system as described in claim 5, characterized in that, The heat consumption and heat generation in the heat exchanger satisfy the efficiency relationship.

8. The integrated energy system as described in claim 5, characterized in that, The heat output of the bus corresponding to the hot water load of the previous load type is equal to the sum of the heat demanded by the user on the bus corresponding to the hot water load of the current load type and the heat input to the bus corresponding to the hot water load of the next load type.

9. The integrated energy system as described in any one of claims 1-8, characterized in that, The system optimizes the number of energy devices to be installed with the goal of minimizing overall operating costs.

10. A planning method for an integrated energy system, characterized in that, The method includes: The system acquires multiple energy devices and buses of different load types; each energy device includes at least one interface; The corresponding load type is determined based on the energy quality difference of each interface, and each interface is connected to the bus corresponding to the load type.

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