A structural design method for integrated energy supply systems considering rapid analysis of energy demand

Abstract

The present invention discloses a method for designing the structure of an integrated energy supply system taking into account rapid analysis of energy demand. The present invention includes the following steps: first, based on an initial system structure set composed of integrated energy supply systems of different structures, combined with the initial input energy of the integrated energy supply system, reliability evaluation is performed on each integrated energy supply system structure in the initial system structure set, and a reliable structure set is formed by the integrated energy supply system structures that meet the reliability constraints; secondly, the integrated energy supply system structures in the reliable structure set are optimized and solved to obtain the optimal integrated energy supply system structure. The present invention takes into account the changes between energy sources, system operating costs and component complexity, and realizes rapid structural design of the integrated energy supply system based on the reverse traversal of the component combination whose output power is less than the system energy demand, saving calculation time.

Description

Technical Field

[0001] The present invention relates to a structural design method for an integrated energy supply system in the field of integrated energy systems, and in particular to a structural design method for an integrated energy supply system taking into account rapid analysis of energy demand. Background Art

[0002] An integrated energy supply system is designed to improve energy efficiency, promote renewable energy consumption, and foster low-carbon, green, and sustainable development. The reliability of an integrated energy supply system can be defined as its ability to meet energy demands and provide users with consistent, high-quality energy. This provides valuable insights into system planning and operation.

[0003] During the planning phase, integrated energy supply systems often have a variety of system structure options for engineers to choose from. The structural design of an integrated energy supply system refers to selecting the integrated energy supply system structure with the lowest system operating cost as the optimal structure in the set of scheme combinations with known system structures, while ensuring system reliability. At the same time, this optimal structure is also the optimal structure of the integrated energy supply system to be determined during the planning phase. The structural design of an integrated energy supply system is closely related to the operating cost and safety of the power grid, so it is very meaningful to study the structural design of an integrated energy supply system. Since there are multiple multi-energy coupling elements in an integrated energy supply system, and elements with the same function may also come from different types, the essence of structural design is to select suitable elements from various types of multi-energy coupling elements to meet the system's reliability constraints and minimize costs.

[0004] However, the traditional integrated energy supply system structural design often targets multi-energy coupling elements in which each energy source is independent and cannot undergo energy changes. Its structural design model and method do not consider the impact of the multi-energy coupling process, and are unable to select the integrated energy supply system structure with the energy coupling process, and then determine the appropriate integrated energy supply system structure with the energy coupling process.

[0005] Furthermore, for the design of integrated energy supply system structures, the reliability assessment of each possible system structure is a crucial step in the optimization process. However, the reliability assessment methods involved in traditional integrated energy supply system structure design are mainly based on the traversal principle, which evaluates the system reliability through the complete calculation of the system state. This assessment process can accurately complete the calculation of system reliability, but for application scenarios with low energy demand, the practice of calculating reliability by traversing the state will produce a large number of system states that can clearly meet the system energy demand. In particular, when the integrated energy supply system structure includes multi-energy coupling elements with energy coupling processes, the system energy changes will be further complicated by the energy coupling process of the multi-energy coupling elements. The system state traversal generated by the system state is irrelevant to the critical conditions for meeting the energy demand, which further increases the computational burden. Summary of the Invention

[0006] In order to solve the problems and needs existing in the background technology, the present invention proposes a comprehensive energy supply system structure design method considering rapid analysis of energy demand.

[0007] The technical solutions of the present invention are as follows:

[0008] 1. A structural design method for an integrated energy supply system considering rapid analysis of energy demand

[0009] Step 1: Based on an initial system structure set consisting of integrated energy supply systems with different structures and the initial input energy of the integrated energy supply systems, reliability evaluation is performed on each integrated energy supply system structure in the initial system structure set. The integrated energy supply system structures that meet the reliability constraints are used to form a reliable structure set.

[0010] Step 2: Optimize and solve the comprehensive energy supply system structure in the reliable structure set to obtain the optimal comprehensive energy supply system structure.

[0011] In the first step, the integrated energy supply system structures composed of the same type and the same number of multi-energy coupling elements are recorded as the same integrated energy supply system structures.

[0012] The first step is specifically:

[0013] Step 1.1: Construct an energy conversion model corresponding to each multi-energy coupling element in each integrated energy supply system structure;

[0014] Step 1.2: Based on the energy conversion model of each multi-energy coupling element and the initial input energy of the integrated energy supply system, construct the output power model corresponding to each multi-energy coupling element;

[0015] Step 1.3: Use the output power models corresponding to all multi-energy coupling elements in the current integrated energy supply system structure to quickly evaluate the reliability of the current integrated energy supply system structure and obtain the reliability evaluation results of the current integrated energy supply system structure;

[0016] Step 1.4: Repeat steps 1.1 to 1.3 to perform reliability assessment on other integrated energy supply system structures in the initial system structure set, and obtain reliability assessment results corresponding to all integrated energy supply system structures;

[0017] Step 1.5: Based on the reliability evaluation results corresponding to all integrated energy supply system structures, a reliable structure set is formed by the integrated energy supply system structures that meet the reliability constraints.

[0018] In step 1.1, the process of constructing the energy conversion model corresponding to each multi-energy coupling element is as follows:

[0019] Construct a comprehensive energy supply system based on the number of states and energy types of multi-energy coupling elements m The energy conversion capability of the multi-energy coupling element in converting the initial input energy into each energy type in the output power in different states is composed of the energy conversion capability of the multi-energy coupling element in converting the initial input energy into different energy types in the output power in different states. v =1,2,…, V , V Indicates the number of energy types of the multi-energy coupling element.

[0020] In step 1.2, the process of constructing the output power model corresponding to each multi-energy coupling element is as follows:

[0021] Step 1.2.1: Multiply the energy conversion capability of each energy type in the energy conversion model of each multi-energy coupling element in each state from the initial input energy to the output power by the initial input energy of the integrated energy supply system to obtain the output power of the multi-energy coupling element in each state considering each energy type. Then, traverse the energy conversion capability of all energy types in the state from the initial input energy to the output power to obtain the output power of the multi-energy coupling element in the state considering all energy types.

[0022] Step 1.2.2: Change the state of the multi-energy coupling element and repeat step 1.2.1 until the output power of the multi-energy coupling element in different states considering all energy types is calculated and obtained, thereby obtaining the output power model of the current multi-energy coupling element.

[0023] In step 1.3, the process of quickly evaluating the reliability of the current integrated energy supply system structure is as follows:

[0024] Step 1.3.1: Construct an intermediate integrated energy supply system consisting of multiple energy coupling elements and calculate the intermediate reliability of the intermediate integrated energy supply system. If the intermediate reliability of the intermediate integrated energy supply system is greater than or equal to the preset reliability threshold, the reliability of the integrated energy supply system meets the reliability constraint. Otherwise, proceed to step 1.3.2.

[0025] Step 1.3.2: Increase the number of multi-energy coupling elements in the current intermediate integrated energy supply system by one to form a new intermediate integrated energy supply system, and then calculate the intermediate reliability of the latest intermediate integrated energy supply system;

[0026] Step 1.3.3: If the intermediate reliability of the current intermediate integrated energy supply system is greater than or equal to the preset reliability threshold, the reliability of the integrated energy supply system meets the reliability constraint; otherwise, execute step 1.3.2. If the number of multi-energy coupling elements in the latest intermediate integrated energy supply system is greater than the number of multi-energy coupling elements in the integrated energy supply system, the reliability of the integrated energy supply system does not meet the reliability constraint.

[0027] The second step is specifically as follows:

[0028] Considering the operating cost and component complexity, the optimization method is used to optimize the integrated energy supply system structure in the reliable structure set to obtain the optimal integrated energy supply system structure.

[0029] 2. A comprehensive energy supply system structure design device considering rapid analysis of energy demand

[0030] A reliable structure set generation unit is used to perform reliability evaluation on each integrated energy supply system structure in the initial system structure set based on the initial input energy of the integrated energy supply system, and form a reliable structure set from the integrated energy supply system structures that meet the reliability constraints;

[0031] The system structure optimization solving unit optimizes and solves the comprehensive energy supply system structure in the reliable structure set to obtain the optimal comprehensive energy supply system structure.

[0032] 3. A computer device

[0033] The device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of the method for designing the structure of an integrated energy supply system considering rapid analysis of energy demand are implemented.

[0034] 4. A Computer-Readable Storage Medium

[0035] The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for designing the structure of an integrated energy supply system that considers rapid analysis of energy demand.

[0036] The method proposed in the present invention takes into account the changing process between energy sources and is applied to the optimal structural selection of integrated energy supply systems with different structures of multi-energy coupling elements of different types and numbers. At the same time, the optimization goal of the present invention not only takes into account the operating cost of the integrated energy supply system, but also takes into account the complexity of the components of the integrated energy supply system, thereby expanding the application scenarios of traditional integrated energy supply system structural design.

[0037] In addition, in terms of calculation time, the method proposed in the present invention improves the reliability assessment of integrated energy supply systems of any different structures. Starting from the component status, once the state superposition of some components meets the system energy demand, the state superposition of these components is stopped, and then the state superposition process of the remaining components is entered, and it is continuously iterated until all components are traversed. By such a reverse traversal that is less than the system energy demand, a rapid assessment of the reliability of a certain integrated energy supply system structure is achieved, which reduces the assessment time of the reliability of a certain system structure, and can quickly determine whether the reliability constraints are met, thereby shortening the time required for structural design.

[0038] The beneficial effects of the present invention are:

[0039] Compared with existing methods, the present invention takes into account the changing process between energy sources, and the system structure optimization goal proposed by the present invention takes into account the operating cost and component complexity of the integrated energy supply system, and ultimately determines the integrated energy supply system with the lowest comprehensive complexity under the reliability constraints, and the implementation time is much less than the existing method.

[0040] Compared with existing methods, the method proposed in the present invention focuses on the combination of multi-energy coupling elements whose output power is less than the system energy demand. Such reverse traversal of the element states can realize the rapid evaluation of the structural reliability of the integrated energy supply system. When the system energy demand is small, the operation speed of the existing technical solution can be improved in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a flow chart of the method of the present invention.

[0042] Figure 2 It is the calculation logic diagram of the first step of the present invention.

[0043] Figure 3 It is a structural diagram of the integrated energy supply system.

[0044] Figure 4 It is a structural diagram of the optimal integrated energy supply system. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the present invention and thus to more clearly define the scope of protection claimed by the present invention, the present invention is described in detail below with respect to certain specific embodiments and drawings of the present invention. It should be noted that the following are only certain specific implementation methods of the present invention, which are only part of the embodiments of the present invention, wherein the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the scope of implementation of the present invention. The conventional selections and replacements made by those skilled in the art under the guidance of the present invention, as well as the reasonable arrangement and combination of several technical features under the guidance of the present invention, should all be deemed to be within the scope of protection claimed by the present invention.

[0046] like Figure 1 As shown, the present invention proposes a method for designing a comprehensive energy supply system structure considering rapid analysis of energy demand, comprising the following steps:

[0047] The structural design of an integrated energy supply system refers to selecting the optimal structure in a set of schemes with known system structures, with the lowest system operating cost, while ensuring system reliability, that is, the optimal structure of the integrated energy supply system.

[0048] Step 1: Based on an initial system structure set consisting of integrated energy supply systems with different structures and the initial input energy of the integrated energy supply systems, reliability evaluation is performed on each integrated energy supply system structure in the initial system structure set. The integrated energy supply system structures that meet the reliability constraints are used to form a reliable structure set.

[0049] An integrated energy supply system consists of multiple multi-energy coupling elements with the same functionality connected in parallel. These elements, such as natural gas units and combined heating, cooling, and power (CCHP) units, come in different types. Different types of multi-energy coupling elements are distinguished based on two factors: their operating cost and the operating state corresponding to each energy type. The state refers to the different output powers of the multi-energy coupling element, and the energy type refers to the energy type involved, such as electricity, heat, or natural gas. The state distribution of each multi-energy coupling element is independent of the others. Different types of multi-energy coupling elements have different operating costs or operating states.

[0050] The integrated energy supply system structure composed of the same type and the same number of multi-energy coupling elements is recorded as the same integrated energy supply system structure. For the same type of multi-energy coupling elements, their operating costs or operating status are known.

[0051] like Figure 2 As shown, the first step is:

[0052] Step 1.1: Construct an energy conversion model corresponding to each multi-energy coupling element in each integrated energy supply system structure. The energy conversion model is used to represent the conversion process between various energy sources within the multi-energy coupling element;

[0053] Included in the initial system structure set P 0 integrated energy supply system structure, the structure of the integrated energy supply system is known, that is, the operating cost or operating status of any multi-energy coupling element contained in the system is known. m Integrated energy supply system structure m ,Depend on n Multi-energy coupling elements are connected in parallel. m = 1,2,…, P 0. The number of states of each multi-energy coupling element is l , the number of energy types is V , multi-energy coupling element i In state j The output power under , i =1,2,…, n , j =1,2,…, l , multi-energy coupling element i In state j The corresponding probability is , Indicates the structure of the integrated energy supply system m Single multi-energy coupling element i In state j Energy types considered under v output power. Indicates the structure of the integrated energy supply system m Multi-energy coupling element i operating costs.

[0054] The operating principle of the multi-energy coupling element is to convert the initial input energy of the system into the energy required by the system later through the multi-energy conversion capability of the element. Considering that the multi-energy coupling element can convert various energy sources, the present invention constructs a comprehensive energy supply system based on the number of states and energy types of the multi-energy coupling element. m The multi-energy coupling element converts the initial input energy into each energy type in the output power under different states v The energy conversion capability of the multi-energy coupling element is composed of the energy conversion capability of the multi-energy coupling element to convert the initial input energy into different energy types in the output power in different states. v =1,2,…, V , V Represents the number of energy types of the multi-energy coupling element. The specific formula is as follows:

[0055] ;

[0056] in, In the integrated energy supply system m Multi-energy coupling element i In state j The energy type that converts the initial input energy into output power v energy conversion capability, In the integrated energy supply system m Multi-energy coupling element i In state j The type of energy that will be initially entered into the energy v 'Converted to energy type in output power v energy conversion capability, v ' =1,2,…, V Multi-energy coupling element i In state j The probability of .

[0057] Step 1.2: If Figure 3 As shown, based on the energy conversion model of each multi-energy coupling element and the initial input energy of the integrated energy supply system, the output power model corresponding to each multi-energy coupling element is constructed respectively. The output power model is used to represent the conversion process between each output energy of the multi-energy coupling element and the initial input energy;

[0058] In step 1.2, the output power model corresponding to each multi-energy coupling element is constructed as follows:

[0059] Step 1.2.1: In the energy conversion model of each multi-energy coupling element, the multi-energy coupling element in each state j Each energy type that converts the initial input energy into output power in the state v After multiplying the energy conversion capacity of the integrated energy supply system by the initial input energy, the multi-energy coupling element in each state is obtained. j Consider the output power of each energy type under this state, traverse the energy conversion capacity of all energy types that convert the initial input energy into output power under this state, and obtain the energy conversion capacity of the multi-energy coupling element under this state. j The output power of all energy types is considered below; the formula is as follows:

[0060]

[0061]

[0062]

[0063] in, Indicates integrated energy supply system m Multi-energy coupling element i In state j The output power under In the integrated energy supply system m Multi-energy coupling element i In state j Energy types considered under v output power. In the integrated energy supply system m Multi-energy coupling element i In state j The energy type that converts the initial input energy into output power v energy conversion capabilities. In the integrated energy supply system m Multi-energy coupling element i In state j The type of energy that will be initially entered into the energy a Energy type converted into output power v energy conversion capabilities. To consider energy type a The initial input energy of the integrated energy supply system. To consider energy type v The initial input energy of the integrated energy supply system. Energy type 1 - Energy type V The initial input energy of the integrated energy supply system.

[0064] Step 1.2.2: Change the state of the multi-energy coupling element and repeat step 1.2.1 until the output power of the multi-energy coupling element in different states considering all energy types is calculated and obtained, thereby obtaining the output power model of the current multi-energy coupling element.

[0065] Step 1.3: Use the output power models corresponding to all multi-energy coupling elements in the current integrated energy supply system structure to evaluate the reliability of the current integrated energy supply system structure and obtain the reliability evaluation results of the current integrated energy supply system structure;

[0066] In step 1.3, the reliability assessment process for each integrated energy supply system structure is as follows:

[0067] Step 1.3.1: Construct an intermediate integrated energy supply system consisting of multiple energy coupling elements and calculate the intermediate reliability of the intermediate integrated energy supply system. If the intermediate reliability of the intermediate integrated energy supply system is greater than or equal to the preset reliability threshold, the reliability of the integrated energy supply system meets the reliability constraint. Otherwise, proceed to step 1.3.2.

[0068] The calculation formula for the intermediate reliability of an intermediate integrated energy supply system composed of a multi-energy coupling element is as follows:

[0069]

[0070]

[0071]

[0072] By this method, all possible results in which the output power of the multi-energy coupling element 1 is less than or equal to the energy demand of the intermediate system are traversed.

[0073] Among them, R m,1 ( demand ',1 ) represents the energy demand of the intermediate system as demand The intermediate reliability of the intermediate integrated energy supply system with a total number of multi-energy coupling elements of 1, Considering energy type v The intermediate system energy demand, Indicates that the multi-energy coupling element 1 in the integrated energy supply system m is in state b The probability of The energy demand of the intermediate system is expressed as The intermediate reliability of the intermediate integrated energy supply system with a total number of multi-energy coupling elements of 0, Indicates integrated energy supply system m The multi-energy coupling element 1 is in the state b The output power under In the integrated energy supply system m The multi-energy coupling element 1 is in the state b Energy types considered under v The output power, To consider energy type a The initial input energy of the integrated energy supply system. In the integrated energy supply system m The multi-energy coupling element 1 is in the state b The type of energy that will be initially input into the energy a Energy type converted into output power v energy conversion capabilities.

[0074] Step 1.3.2: Increase the number of multi-energy coupling elements in the current intermediate integrated energy supply system by one to form a new intermediate integrated energy supply system, and then calculate the intermediate reliability of the latest intermediate integrated energy supply system;

[0075] Step 1.3.3: If the intermediate reliability of the current intermediate integrated energy supply system is greater than or equal to the preset reliability threshold, the reliability of the integrated energy supply system meets the reliability constraint; otherwise, execute step 1.3.2. If the number of multi-energy coupling elements in the latest intermediate integrated energy supply system is greater than the number of multi-energy coupling elements in the integrated energy supply system, the reliability of the integrated energy supply system does not meet the reliability constraint.

[0076] If the intermediate integrated energy supply system consists of only two multi-energy coupling elements, element 1 and element 2, then the intermediate reliability model of the intermediate integrated energy supply system is:

[0077]

[0078]

[0079] First consider element 2. If the intermediate system energy demand If the value of any energy type is less than or equal to 0, then Directly equal to 1, and no subsequent calculation is required. If it is not satisfied, it is necessary to calculate the intermediate reliability of the intermediate integrated energy supply system consisting of only one multi-energy coupling element (element 1). When calculating the intermediate reliability of the intermediate integrated energy supply system consisting of only one multi-energy coupling element (element 1), the calculation process is the same as the above steps. If the intermediate system energy demand If the value of any energy type is less than or equal to 0, then Directly equal to 1, otherwise Equal to 0, for In terms of the intermediate reliability of the subsequent intermediate integrated energy supply system, there is no need to calculate it, because there are no multi-energy coupling elements to construct the integrated energy supply system. Through this method, all possibilities where the sum of the output power of multi-energy coupling elements 1 and 2 in each state is less than or equal to the energy demand of the intermediate system are traversed.

[0080] in, The intermediate system energy demand is expressed as demand The intermediate reliability of the intermediate integrated energy supply system with a total number of 2 multi-energy coupling elements, The intermediate system energy demand is expressed as The intermediate reliability of the intermediate integrated energy supply system with a total number of multi-energy coupling elements of 1, Indicates integrated energy supply system m The only multi-energy coupling element 2 in the state b The output power under In the integrated energy supply system m The multi-energy coupling element 2 is in the state b Energy types considered under v The output power, In the integrated energy supply system m The multi-energy coupling element 2 is in the state b The probability of the next. The energy demand of the intermediate system is expressed as The intermediate reliability of the intermediate integrated energy supply system with a total number of multi-energy coupling elements of 0. In the integrated energy supply system m The multi-energy coupling element 2 is in the state b The type of energy that will be initially input into the energy a Energy type converted into output power v energy conversion capabilities. To consider energy type a The initial input energy of the integrated energy supply system.

[0081] By analogy, k The intermediate reliability model of the intermediate integrated energy supply system composed of multiple energy coupling elements can be expressed as:

[0082]

[0083] By this method, the multi-energy coupling elements 1, 2 are k All possible outcomes where the sum of the output powers in each state is less than or equal to the intermediate system energy demand will be traversed.

[0084] in, The energy demand of the intermediate system is expressed as demand The total number of multi-energy coupling elements is k The intermediate reliability of the intermediate integrated energy supply system, k = 1,2…, n , The energy demand of the intermediate system is expressed as The total number of multi-energy coupling elements is k -1 intermediate reliability of the intermediate integrated energy supply system, Indicates integrated energy supply system m Multi-energy coupling element k In state b The output power under In the integrated energy supply system m Multi-energy coupling element k In state b Energy types considered under v The output power, In the integrated energy supply system m Multi-energy coupling element k In state b The probability of the next. In the integrated energy supply systemm Multi-energy coupling element k In state b The type of energy that will be initially input into the energy a Energy type converted into output power v energy conversion capabilities. To consider energy type v The initial input energy of the integrated energy supply system.

[0085] When the number of elements is 0 and demand 'When greater than 0, R m, 0 ( demand ', 0 ) is equal to 0, that is, there is no intermediate integrated energy supply system composed of any multi-energy coupling elements. When the intermediate system energy demand is greater than 0, its intermediate reliability is 0. This is because the reliability of an integrated energy supply system without multi-energy coupling elements must be 0. When the intermediate system energy demand demand '= ( d ' 1 , d ' 2 ,…, d ' V ) When the energy demand of any energy type is less than or equal to 0, R m,k ( demand ', k ) is equal to 1, that is, considering any energy type v When the energy demands of the intermediate systems are all less than or equal to 0, the intermediate reliability of the intermediate integrated energy supply system composed of any elements (including 0 multi-energy coupling elements) is 1. This is because the reliability of the integrated energy supply system without energy demand must be 1 regardless of the number of multi-energy coupling elements.

[0086] Based on the above intermediate reliability model, k Starting from 1, traverse from large to small n , we can obtain the m The intermediate reliability of the entire intermediate integrated energy supply system composed of any number of multi-energy coupling elements.

[0087] Integrated energy supply system m The reliability can be expressed as:

[0088]

[0089] in, demand represents the system energy demand, d v Considering energy type v The system energy demand, R m ( demand , n ) represents the system energy demand as demand The reliability of the integrated energy supply system, The energy demand of the intermediate system is expressed as The total number of multi-energy coupling elements is n -1 intermediate reliability of the intermediate integrated energy supply system, Indicates integrated energy supply system m Multi-energy coupling element n In state b The output power under Indicates the structure of the integrated energy supply system m Multi-energy coupling element n In state b Energy types considered under v The output power, Indicates the structure of the integrated energy supply system m Multi-energy coupling element n In state b The probability of the next. In the integrated energy supply system m Multi-energy coupling element n In state b The type of energy that will be initially input into the energy a Energy type converted into output power v energy conversion capabilities. To consider energy type a The initial input energy of the integrated energy supply system.

[0090] In the above reliability evaluation method, once the sum of the output power of any component under any energy type is greater than or equal to the system energy demand, the intermediate reliability is equal to 1, and the subsequent intermediate reliability calculation is stopped, and the sum of the output power of the remaining components is compared with the system energy demand. At the same time, the number of multi-energy coupling elements corresponding to the intermediate reliability is also increased from 1 to n , ensuring that every multi-energy coupling element combination whose total output power is less than the system energy demand is traversed. The reliability assessment method proposed in this invention approaches this from the opposite direction, focusing more on multi-energy coupling element combinations whose output power is less than the system energy demand. When the system energy demand is low, the number of multi-energy coupling element combinations whose output power is less than the system energy demand will be less than the number of multi-energy coupling element combinations whose output power is greater than or equal to the system energy demand, thereby shortening the reliability assessment time.

[0091] Step 1.4: Repeat steps 1.1 to 1.3 to perform reliability assessment on other integrated energy supply system structures in the initial system structure set, and obtain reliability assessment results corresponding to all integrated energy supply system structures;

[0092] Step 1.5: Based on the reliability evaluation results corresponding to all integrated energy supply system structures, the integrated energy supply system structures that meet the reliability constraints are combined into a reliable structure set, namely Indicates the preset reliability threshold.

[0093] Step 2: Optimize and solve the integrated energy supply system structure in the reliable structure set to obtain the optimal integrated energy supply system structure, and design the integrated functional system based on the integrated energy supply system structure.

[0094] The second step is as follows:

[0095] Taking into account the operating cost and component complexity, the optimization method is used to optimize and solve the integrated energy supply system structure in the reliable structure set to obtain the optimal integrated energy supply system structure, that is, the integrated energy supply system structure with the minimum comprehensive complexity considering the operating cost under the reliability constraint in the reliable structure set.

[0096] like Figure 4 As shown, the optimization method is a traversal algorithm, and the reliable structure set contains P 0m The overall complexity of an integrated energy supply system structure encompasses both the system's operating cost and its component complexity. The system's operating cost is determined by the sum of the component operating costs. Component complexity is determined by the number of multi-energy coupling component types. Generally, the more component types, the more complex the system. Therefore, the overall complexity of an integrated energy supply system structure is defined based on the system's operating cost. When the system's operating cost remains constant, the fewer the number of multi-energy coupling component types, the lower the overall complexity.

[0097] The comprehensive complexity of each integrated energy supply system structure:

[0098]

[0099] in, Represents the structure of the integrated energy supply system m The overall complexity of n Represents the structure of the integrated energy supply system m The number of multi-energy coupling elements in Represents the structure of the integrated energy supply system m Middle i The operating cost of a multi-energy coupling element; Represents the structure of the integrated energy supply system m The number of types of multi-energy coupling elements in the system; λ is the weight parameter, which is a very small positive number, ensuring that when the costs are different, the cost term plays a dominant role, while when the costs are the same, the number of types of multi-energy coupling elements plays a decisive role.

[0100] In the traversal algorithm, the reliable structure set is P 0m The comprehensive complexity of the integrated energy supply system structure is calculated and obtained P 0m The comprehensive complexity of the integrated energy supply system structure, P 0m Different system structures are P 0m The number of component types and the number of components contained in each type are combined with different values. From them, the integrated energy supply system structure with the lowest comprehensive complexity that meets the reliability constraint is selected, and the integrated energy supply system structure is taken as the optimal structure of the integrated energy supply system to construct the integrated energy supply system.

[0101] The following describes the structural design of integrated energy supply systems consisting of different numbers of CHP units connected in parallel. During the experiment, the initial system structure set included 10 different integrated energy supply system structures. Different integrated energy supply system structures consist of the same total number of CHP units, but they may contain different types of CHP units. The same type of CHP unit may also have different numbers of units in different integrated energy supply system structures. Each CHP unit has three performance characteristics: heat, electricity, and gas. Each CHP unit has six states, and different types of CHP units have different states.

[0102] The efficiency comparison results of the method proposed in the present invention and the traditional method for the structural design of an integrated energy supply system consisting of 10, 20, and 30 CHP units connected in parallel are shown in Table 1. As can be seen from Table 1, the method proposed in the present invention significantly shortens the time required for structural design.

[0103] Table 1 is a comparison table of the efficiency of the method proposed by the present invention and the traditional method

[0104]

[0105] The present invention also proposes a comprehensive energy supply system structure design device that takes into account rapid analysis of energy demand, including:

[0106] A reliable structure set generation unit is used to perform reliability evaluation on each integrated energy supply system structure in the initial system structure set based on the initial input energy of the integrated energy supply system, and form a reliable structure set from the integrated energy supply system structures that meet the reliability constraints;

[0107] The system structure optimization solving unit optimizes and solves the comprehensive energy supply system structure in the reliable structure set to obtain the optimal comprehensive energy supply system structure.

[0108] The present invention also proposes a computer device, which includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the steps of a comprehensive energy supply system structure design method that takes into account rapid analysis of energy demand.

Claims

1. A method for designing a comprehensive energy supply system structure considering rapid analysis of energy demand, characterized in that: The following steps are involved: Step 1: Based on an initial system structure set consisting of integrated energy supply systems with different structures and the initial input energy of the integrated energy supply systems, reliability evaluation is performed on each integrated energy supply system structure in the initial system structure set. The integrated energy supply system structures that meet the reliability constraints are used to form a reliable structure set. Step 2: Optimize and solve the integrated energy supply system structure in the reliable structure set to obtain the optimal integrated energy supply system structure; The first step is specifically: Step 1.1: Construct an energy conversion model corresponding to each multi-energy coupling element in each integrated energy supply system structure; Step 1.2: Based on the energy conversion model of each multi-energy coupling element and the initial input energy of the integrated energy supply system, construct the output power model corresponding to each multi-energy coupling element; Step 1.3: Use the output power models corresponding to all multi-energy coupling elements in the current integrated energy supply system structure to quickly evaluate the reliability of the current integrated energy supply system structure and obtain the reliability evaluation results of the current integrated energy supply system structure; Step 1.4: Repeat steps 1.1 to 1.3 to perform reliability assessment on other integrated energy supply system structures in the initial system structure set, and obtain reliability assessment results corresponding to all integrated energy supply system structures; Step 1.5: Based on the reliability evaluation results corresponding to all integrated energy supply system structures, a reliable structure set is formed by the integrated energy supply system structures that meet the reliability constraints; In step 1.1, the process of constructing the energy conversion model corresponding to each multi-energy coupling element is as follows: According to the number of states and energy types of the multi-energy coupling element, the energy conversion capability of the multi-energy coupling element in the integrated energy supply system m in different states to convert the initial input energy into each energy type in the output power is constructed. The energy conversion capability of the multi-energy coupling element in different states to convert the initial input energy into different energy types in the output power constitutes the energy conversion model of the multi-energy coupling element. v =1,2,…, V , V Indicates the number of energy types of the multi-energy coupling element; In step 1.2, the process of constructing the output power model corresponding to each multi-energy coupling element is as follows: Step 1.2.1: Multiply the energy conversion capability of each energy type in the energy conversion model of each multi-energy coupling element in each state from the initial input energy to the output power by the initial input energy of the integrated energy supply system to obtain the output power of the multi-energy coupling element in each state considering each energy type. Then, traverse the energy conversion capability of all energy types in the state from the initial input energy to the output power to obtain the output power of the multi-energy coupling element in the state considering all energy types. Step 1.2.2: Change the state of the multi-energy coupling element and repeat step 1.2.1 until the output power of the multi-energy coupling element in different states considering all energy types is calculated and obtained, thereby obtaining the output power model of the current multi-energy coupling element; In step 1.3, the process of quickly evaluating the reliability of the current integrated energy supply system structure is as follows: Step 1.3.1: Construct an intermediate integrated energy supply system consisting of multiple energy coupling elements, and calculate the intermediate reliability of the intermediate integrated energy supply system. If the intermediate reliability of the intermediate integrated energy supply system is greater than or equal to a preset reliability threshold, the reliability of the integrated energy supply system satisfies the reliability constraint. Otherwise, proceed to step 1.3.2; Step 1.3.2: Increase the number of multi-energy coupling elements in the current intermediate integrated energy supply system by one to form a new intermediate integrated energy supply system, and then calculate the intermediate reliability of the latest intermediate integrated energy supply system; Step 1.3.3: If the intermediate reliability of the current intermediate integrated energy supply system is greater than or equal to the preset reliability threshold, the reliability of the integrated energy supply system meets the reliability constraint. Otherwise, proceed to step 1.3.

2. If the number of multi-energy coupling elements in the latest intermediate integrated energy supply system is greater than the number of multi-energy coupling elements in the integrated energy supply system, the reliability of the integrated energy supply system does not meet the reliability constraint. The second step is specifically as follows: Considering the operating cost and component complexity, the optimization method is used to optimize the integrated energy supply system structure in the reliable structure set to obtain the optimal integrated energy supply system structure.

2. A method for designing a comprehensive energy supply system structure considering rapid analysis of energy demand according to claim 1, characterized in that: In the first step, the integrated energy supply system structures composed of the same type and the same number of multi-energy coupling elements are recorded as the same integrated energy supply system structures.

3. A device for designing a structure of an integrated energy supply system taking into account rapid analysis of energy demand, for implementing the method for designing a structure of an integrated energy supply system taking into account rapid analysis of energy demand as described in claim 1 or 2, characterized in that: include: A reliable structure set generation unit is used to perform reliability evaluation on each integrated energy supply system structure in the initial system structure set based on the initial input energy of the integrated energy supply system, and form a reliable structure set from the integrated energy supply system structures that meet the reliability constraints; The system structure optimization solving unit optimizes and solves the comprehensive energy supply system structure in the reliable structure set to obtain the optimal comprehensive energy supply system structure.

4. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the processor implements the steps of a method for designing the structure of an integrated energy supply system considering rapid analysis of energy demand according to any one of claims 1 to 2.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a method for designing a structure of an integrated energy supply system considering rapid analysis of energy demand according to any one of claims 1 to 2 are implemented.

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