Electromagnetic transient efficient modeling method and system for internal combustion engine and photovoltaic bundling system

Abstract

The invention discloses an electromagnetic transient efficient modeling method and system for an internal combustion engine and a photovoltaic bundling system, and the method comprises the steps: obtaining equipment parameters in the internal combustion engine and the photovoltaic bundling system, and building a mathematical equation; performing numerical integral discretization on the mathematical equation to obtain a discretized circuit equation, and establishing a discretized circuit model of each device; based on AC side large inductance and DC side large capacitance, the converter is decoupled, the whole DC circuit is independently solved, and an AC port is subjected to node elimination. According to the method, the direct current part and the alternating current part of the internal combustion engine and the photovoltaic bundling system are decoupled, the direct current circuit is independently calculated, the alternating current port is subjected to node elimination, the two circuits are interacted through signals, efficient modeling of the system is achieved, the calculated amount during system calculation is greatly reduced, and the calculation efficiency is improved. The electromagnetic transient simulation speed is increased; parallel processing is adopted for direct-current circuit calculation, so that simulation of a larger-scale internal combustion engine and a photovoltaic bundling system is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system simulation and optimization, and in particular to an electromagnetic transient efficient modeling method and system for an internal combustion engine and a photovoltaic bundling system. Background Art

[0002] Accurate simulation of internal combustion engines and photovoltaic bundling systems helps to deeply understand the impact of photovoltaic intermittency on the dynamic characteristics of internal combustion engines. Currently, there are two general methods for electromagnetic transient simulation of internal combustion engines and photovoltaic bundling systems:

[0003] One method is to use the component models in the component library of the electromagnetic transient simulation software for detailed modeling. However, due to the large number of photovoltaic power generation units and the inclusion of power electronic devices, the number of system nodes is high and the required simulation step size is small, which results in an extremely slow simulation speed. The second method is to use an equivalent aggregation model to replace the internal combustion engine and photovoltaic bundling system with the characteristics of a single or a small number of internal combustion engines and photovoltaic models. However, the simulation accuracy of the equivalent aggregation algorithm is low, and the aggregation process needs to change in real time according to the operating characteristics, which results in poor simulation speed-up effect.

[0004] For electromagnetic transient simulation of large internal combustion engines and photovoltaic bundling systems, if the decoupling characteristics of the model can be utilized to decouple the DC and AC parts of the system and calculate them independently, thereby reducing the amount of solution calculations, it will play an important role in improving the overall simulation efficiency of the system. However, due to the complex characteristics of the converters of internal combustion engines and photovoltaic bundling systems, it is necessary to analyze the characteristic equations of the converters and perform model decoupling. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above existing problems, the present invention is proposed. Therefore, the present invention provides an efficient electromagnetic transient modeling method for an internal combustion engine and a photovoltaic bundling system to solve the problem of slow electromagnetic transient simulation speed of an internal combustion engine and a photovoltaic bundling system.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] In a first aspect, the present invention provides an electromagnetic transient efficient modeling method for an internal combustion engine and a photovoltaic bundling system, comprising:

[0009] Obtain the parameters of each device in the internal combustion engine and photovoltaic bundling system and establish mathematical equations;

[0010] The mathematical equation is numerically integrated and discretized to obtain a discretized circuit equation, and a discretized circuit model of each device is established;

[0011] Based on the large inductance on the AC side and the large capacitance on the DC side, the converter is decoupled, the overall DC circuit is solved independently, and nodes are eliminated on the AC port.

[0012] As a preferred solution of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system described in the present invention, wherein: the converter includes:

[0013] The converter starts from the switching function and considers the existence of large inductance on the AC side and large capacitance on the DC side. The AC port current and DC port voltage have the characteristics of single step and no sudden change to realize the decoupling of the converter.

[0014] As a preferred solution of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system of the present invention, the inverter switching function is expressed as:

[0015]

[0016] Among them, s i represents the switching function. When the value of the switching function is 1, it means that the upper bridge arm switch is turned on. When the value is 0, it means that the lower bridge arm switch is turned on. ij Represents the line voltage; i i represents the phase current; the subscripts i, j (i = a, b, c, j = b, c, a) represent the phase sequence; i dc Represents DC current, R SW is the on-state resistance of the IGBT or diode.

[0017] As a preferred solution of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system of the present invention, wherein: decoupling the converter includes:

[0018] After the converter is decoupled, the DC and AC of the internal combustion engine and the photovoltaic bundling system are decoupled, the DC overall circuit is solved independently, and the AC port is node-eliminated. The decoupled converter is expressed by the equation:

[0019]

[0020] Among them, s i represents the switching function. When the value of the switching function is 1, it means that the upper bridge arm switch is turned on. When the value is 0, it means that the lower bridge arm switch is turned on. ij Represents the line voltage; i i represents the phase current; the subscripts i, j (i = a, b, c, j = b, c, a) represent the phase sequence; i dc Represents DC current, R SWis the on-resistance of the IGBT or diode; the superscript t represents the current moment, and the superscript t-Δt represents the previous moment.

[0021] As a preferred solution of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system of the present invention, the mathematical equation includes:

[0022] The port voltage equation and parameters of the photovoltaic array model are expressed as:

[0023]

[0024] Where i and v are voltage and current, the subscript PV represents a photovoltaic cell, and D represents a photodiode; I ph is the photocurrent of the photodiode; I0 is the diode saturation current; R s is the series equivalent resistance; N c is the number of photovoltaic cells in the photovoltaic module; V t is the diode thermal voltage; C1 and C2 are capacitors.

[0025] As a preferred solution of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system of the present invention, the capacitor is specifically expressed as:

[0026]

[0027] Among them, R sh is the parallel equivalent resistance; S is the ambient irradiance; S Ref is the standard operating irradiance; Vt is the diode thermal voltage; C1 and C2 are capacitors; N ser is the number of photovoltaic modules connected in series; α is the ideal coefficient of the diode.

[0028] As a preferred solution of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system described in the present invention, the discretized circuit model includes:

[0029] The DC circuit calculations are parallelized to enable simulation of larger internal combustion engines and photovoltaic bundled systems.

[0030] In a second aspect, the present invention provides a system for efficient modeling of electromagnetic transients of an internal combustion engine and a photovoltaic bundling system, comprising:

[0031] Data acquisition module, used to obtain the parameters of each device in the internal combustion engine and photovoltaic bundling system and establish mathematical equations;

[0032] A model building module, used to perform numerical integration and discretization on the mathematical equation to obtain a discretized circuit equation and establish a discretized circuit model of each device;

[0033] The decoupling calculation module is used to decouple the converter based on the large inductance on the AC side and the large capacitance on the DC side, independently solve the overall DC circuit, and eliminate nodes on the AC port.

[0034] In a third aspect, the present invention provides a computing device, comprising:

[0035] Memory and processor;

[0036] The memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the electromagnetic transient high-efficiency modeling method of the internal combustion engine and photovoltaic bundling system are implemented.

[0037] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system.

[0038] Compared with the prior art, the present invention has the following beneficial effects: the present invention utilizes the decoupling characteristics of the converter to decouple the DC part and the AC part of the internal combustion engine and the photovoltaic bundling system, the DC circuit is solved independently, the AC port performs node elimination, and the two circuits interact with each other through signals to achieve efficient modeling of the internal combustion engine and the photovoltaic bundling system, which greatly reduces the amount of calculation during system solution and improves the electromagnetic transient simulation speed. In addition, the model has a certain parallel simulation capability, and the DC circuit calculation adopts parallel processing, thereby realizing the simulation of a larger-scale internal combustion engine and photovoltaic bundling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0040] Figure 1 It is a schematic diagram of the overall process of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system according to one embodiment of the present invention;

[0041] Figure 2 A schematic diagram of an AC / DC decoupling model of an internal combustion engine and a photovoltaic bundling system according to an electromagnetic transient efficient modeling method of an internal combustion engine and a photovoltaic bundling system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0045] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0046] At the same time, in the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Example 1

[0049] Reference Figure 1, which is an embodiment of the present invention, provides an electromagnetic transient efficient modeling method for an internal combustion engine and a photovoltaic bundling system, comprising:

[0050] S100: Obtaining parameters of each device in the internal combustion engine and the photovoltaic bundling system, and establishing a mathematical equation;

[0051] In a possible embodiment, the parameters of each device in the internal combustion engine and the photovoltaic bundling system may include: for the internal combustion engine, mainly including fuel consumption rate, exhaust temperature, cooling water temperature, oil pressure and temperature, as well as speed and torque, which together reflect the operating efficiency, thermal balance state, lubrication system health and output power capacity of the internal combustion engine. For the photovoltaic bundling system, the key parameters include the current and voltage of the photovoltaic module, inverter efficiency, total system power, ambient temperature and irradiance, which are directly related to the power generation efficiency, energy conversion process and response to environmental factors of the photovoltaic system.

[0052] In the embodiment of the present application, the port voltage equation and parameter of the photovoltaic array model are expressed as:

[0053]

[0054] Where i and v are voltage and current, the subscript PV represents a photovoltaic cell, and D represents a photodiode; I ph is the photocurrent of the photodiode; I0 is the diode saturation current; R s is the series equivalent resistance; N c is the number of photovoltaic cells in the photovoltaic module; V t is the diode thermal voltage; C1 and C2 are capacitors;

[0055] In the embodiment of the present application, the capacitance is specifically expressed as:

[0056]

[0057] Among them, R sh is the parallel equivalent resistance; S is the ambient irradiance; S Ref is the standard operating irradiance; Vt is the diode thermal voltage; C1 and C2 are capacitors; N ser is the number of photovoltaic modules in series; α is the diode ideality coefficient;

[0058] It should be noted that the parameters of each device in the internal combustion engine and photovoltaic bundling system are obtained, and accurate mathematical equations are established based on these parameters. In particular, for the photovoltaic array model, multiple factors such as parallel equivalent resistance and ambient irradiance are considered, which improves the accuracy and practicality of the photovoltaic bundling system model and provides more detailed and accurate modeling data for the electromagnetic transient simulation of the internal combustion engine and photovoltaic bundling system.

[0059] S102: numerically integrate and discretize the mathematical equation to obtain a discretized circuit equation, and establish a discretized circuit model for each device;

[0060] It should be noted that the purpose of numerically integrating and discretizing mathematical equations is to convert the continuously changing circuit behavior into data at discrete time points that can be processed by computers, thereby obtaining discretized circuit equations. This step is the basis for establishing the discretized circuit model of each device, which enables complex electromagnetic transient processes to be simulated and analyzed efficiently and accurately on digital computers; through discretization, the computational complexity can be reduced, the simulation speed can be increased, and a high simulation accuracy can be maintained, providing an efficient and practical modeling method for electromagnetic transient simulation of internal combustion engines and photovoltaic bundling systems.

[0061] S104: Based on the large inductance on the AC side and the large capacitance on the DC side, the converter is decoupled, the DC overall circuit is solved independently, and the AC port is node eliminated;

[0062] In the embodiment of the present application, the converter starts from the switching function, considering the existence of large inductance on the AC side and large capacitance on the DC side, the AC port current and the DC port voltage have the characteristics of single step and no sudden change, so as to realize the decoupling of the converter;

[0063] In the embodiment of the present application, the converter switching function is expressed as:

[0064]

[0065] Among them, s i represents the switching function. When the value of the switching function is 1, it means that the upper bridge arm switch is turned on. When the value is 0, it means that the lower bridge arm switch is turned on. ij Represents the line voltage; i i represents the phase current; the subscripts i, j (i = a, b, c, j = b, c, a) represent the phase sequence; i dc Represents DC current, R SW is the on-state resistance of the IGBT or diode.

[0066] In the embodiment of the present application, after the converter is decoupled, the DC and AC of the internal combustion engine and the photovoltaic bundling system are decoupled, the DC overall circuit is solved independently, and the AC port is node-eliminated. The decoupled converter is expressed by an equation:

[0067]

[0068] Among them, s i represents the switching function. When the value of the switching function is 1, it means that the upper bridge arm switch is turned on. When the value is 0, it means that the lower bridge arm switch is turned on. ij Represents the line voltage; i irepresents the phase current; the subscripts i, j (i = a, b, c, j = b, c, a) represent the phase sequence; i dc Represents DC current, R SW is the on-resistance of the IGBT or diode; the superscript t represents the current moment, and the superscript t-Δt represents the previous moment.

[0069] In the embodiment of the present application, parallel processing is used for DC circuit calculation to achieve simulation of a larger-scale internal combustion engine and photovoltaic bundling system;

[0070] It should be noted that, through the method of the present invention, based on the characteristics of large inductance on the AC side and large capacitance on the DC side, the decoupling of the converter is successfully achieved, so that the DC overall circuit of the internal combustion engine and the photovoltaic bundling system can be solved independently, while the AC port is simplified by node elimination. This decoupling strategy not only improves the simulation efficiency and reduces the computational complexity, but also enables the calculation of the DC circuit to be processed in parallel, further improving the capability and speed of large-scale system simulation; at the same time, the decoupled converter model is more intuitive and easy to analyze, providing strong support for the optimal design, fault diagnosis and stable operation of the system.

[0071] The above is a schematic scheme of an electromagnetic transient efficient modeling method for an internal combustion engine and photovoltaic bundling system of this embodiment. It should be noted that the technical scheme of the electromagnetic transient efficient modeling system of the internal combustion engine and photovoltaic bundling system and the technical scheme of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system mentioned above belong to the same concept, and the details of the technical scheme of the electromagnetic transient efficient modeling system of the internal combustion engine and photovoltaic bundling system not described in detail in this embodiment can be referred to the description of the technical scheme of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system mentioned above.

[0072] The electromagnetic transient efficient modeling system of the internal combustion engine and photovoltaic bundling system in this embodiment includes:

[0073] Data acquisition module, used to obtain the parameters of each device in the internal combustion engine and photovoltaic bundling system and establish mathematical equations;

[0074] The model building module is used to perform numerical integration and discretization on the mathematical equations to obtain the discretized circuit equations and build the discretized circuit models of each device;

[0075] The decoupling calculation module is used to decouple the converter based on the large inductance on the AC side and the large capacitance on the DC side, independently solve the overall DC circuit, and eliminate nodes on the AC port.

[0076] This embodiment also provides a computing device, which is applicable to the case of electromagnetic transient efficient modeling of an internal combustion engine and a photovoltaic bundling system, including:

[0077] A memory and a processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the electromagnetic transient efficient modeling method for an internal combustion engine and a photovoltaic bundling system as proposed in the above embodiment.

[0078] This embodiment also provides a storage medium having a computer program stored thereon. When the program is executed by a processor, the method for realizing electromagnetic transient efficient modeling of an internal combustion engine and a photovoltaic bundling system as proposed in the above embodiment is implemented.

[0079] The storage medium proposed in this embodiment and the electromagnetic transient efficient modeling method for an internal combustion engine and a photovoltaic bundling system proposed in the above embodiment belong to the same inventive concept. For technical details not fully described in this embodiment, reference can be made to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0080] Through the above description of the implementation methods, the technicians in the relevant field can clearly understand that the present invention can be implemented by means of software and necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ReadOnly, Memory, ROM), random access memory (RandomAccess Memory, RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform the methods of various embodiments of the present invention.

[0081] Example 2

[0082] Reference Figure 2 , which is an embodiment of the present invention, provides an electromagnetic transient efficient modeling method for an internal combustion engine and a photovoltaic bundling system. In order to verify its beneficial effects, the experimental results of the method of the present invention are provided.

[0083] like Figure 2 As shown in Figure 1, the decoupled model splits the PV matrix solution into a DC overall circuit and an AC port circuit that are only connected by signals. The DC overall circuit uses the phase current at the previous moment Get the current DC current After that, the line voltage can be solved independently The AC port circuit uses the line voltage at the previous moment Get the current line voltage Form a port equivalent model to participate in network solution and obtain the current phase current used for the next step Form a closed-loop simulation process.

[0084] based on Figure 2 Decoupling model diagram, taking the coupled system of 14 18MW internal combustion engines and 14 10MW photovoltaic power generation units as an example;

[0085] After the AC / DC decoupling of the converter, the DC and AC parts of the original internal combustion engine and photovoltaic bundling system can be calculated independently;

[0086] Compared with the detailed model built with components in the component library of electromagnetic transient simulation software, it can achieve an acceleration ratio of more than 10 times, and the maximum relative error is less than 3%.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An efficient electromagnetic transient modeling method for an internal combustion engine and photovoltaic bundling system, characterized in that: include: Obtain the parameters of each device in the internal combustion engine and photovoltaic bundling system and establish mathematical equations; The mathematical equation is numerically integrated and discretized to obtain a discretized circuit equation, and a discretized circuit model of each device is established; Based on the large inductance on the AC side and the large capacitance on the DC side, the converter is decoupled, the overall DC circuit is solved independently, and nodes are eliminated on the AC port.

2. The electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system according to claim 1 is characterized in that: The inverter includes: The converter starts from the switching function and considers the existence of large inductance on the AC side and large capacitance on the DC side. The AC port current and DC port voltage have the characteristics of single step and no sudden change to realize the decoupling of the converter.

3. The electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system according to claim 1 or 2, characterized in that: The converter switching function is expressed as: Among them, s i represents the switching function. When the value of the switching function is 1, it means that the upper bridge arm switch is turned on. When the value is 0, it means that the lower bridge arm switch is turned on. ij Represents the line voltage; i i represents the phase current; the subscripts i, j (i = a, b, c, j = b, c, a) represent the phase sequence; i dc Represents DC current, R SW is the on-state resistance of the IGBT or diode.

4. The electromagnetic transient efficient modeling method for the internal combustion engine and photovoltaic bundling system according to claim 3 is characterized in that: Decoupling the converter involves: After the converter is decoupled, the DC and AC of the internal combustion engine and the photovoltaic bundling system are decoupled, the DC overall circuit is solved independently, and the AC port is node-eliminated. The decoupled converter is expressed by the equation: Among them, s i represents the switching function. When the value of the switching function is 1, it means that the upper bridge arm switch is turned on. When the value is 0, it means that the lower bridge arm switch is turned on. ij Represents the line voltage; i i represents the phase current; the subscripts i, j (i = a, b, c, j = b, c, a) represent the phase sequence; i dc Represents DC current, R SW is the on-resistance of the IGBT or diode; the superscript t represents the current moment, and the superscript t-Δt represents the previous moment.

5. The electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system according to claim 4 is characterized in that: The mathematical equations include, The port voltage equation and parameters of the photovoltaic array model are expressed as: Where i and v are voltage and current, the subscript PV represents a photovoltaic cell, and D represents a photodiode; I ph is the photocurrent of the photodiode; I0 is the diode saturation current; R s is the series equivalent resistance; N c is the number of photovoltaic cells in the photovoltaic module; V t is the diode thermal voltage; C1 and C2 are capacitors.

6. The electromagnetic transient efficient modeling method for the internal combustion engine and photovoltaic bundling system according to claim 5, characterized in that: The capacitance is specifically expressed as: Among them, R sh is the parallel equivalent resistance; S is the ambient irradiance; S Ref is the standard operating irradiance; Vt is the diode thermal voltage; C1 and C2 are capacitors; N ser is the number of photovoltaic modules connected in series; α is the ideal coefficient of the diode.

7. The electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system according to claim 6 is characterized in that: Discretized circuit models include: The DC circuit calculations are parallelized to enable simulation of larger internal combustion engines and photovoltaic bundled systems.

8. A system for efficient modeling of electromagnetic transients of internal combustion engines and photovoltaic bundling systems, characterized in that: include, Data acquisition module, used to obtain the parameters of each device in the internal combustion engine and photovoltaic bundling system and establish mathematical equations; A model building module, used to perform numerical integration and discretization on the mathematical equation to obtain a discretized circuit equation and establish a discretized circuit model of each device; The decoupling calculation module is used to decouple the converter based on the large inductance on the AC side and the large capacitance on the DC side, independently solve the overall DC circuit, and eliminate nodes on the AC port.

9. An electronic device, comprising: Memory and processor; The memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the electromagnetic transient efficient modeling method of the internal combustion engine and photovoltaic bundling system according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the electromagnetic transient high-efficiency modeling method for an internal combustion engine and a photovoltaic bundling system according to any one of claims 1 to 7.

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