Method and system for improving loading capacity of low-voltage generator car with controlled current source

Abstract

The invention relates to the technical field of power electronics, in particular to a method and system for improving the loading capacity of a low-voltage generator car of a controlled current source, and the method comprises the steps: designing a three-phase bridge controlled current source hardware structure; adjusting load characteristics according to a hardware structure; establishing an energy fusion mechanism according to load characteristics; modularized integration and full-automatic operation are carried out on the controlled current source; by designing a three-phase bridge controlled current source hardware structure, the capability of accurately controlling three-phase current output is realized, high flexibility and expandability are provided, by utilizing the hardware capability of the three-phase bridge controlled current source, load characteristics are dynamically adjusted, load distribution and power factors are optimized, and by analyzing the adjusted load characteristics, the load distribution and the power factors of the three-phase bridge controlled current source are optimized. An energy fusion mechanism is established, dynamic sharing and transfer of energy among different phases are realized, and rapid deployment and intelligent operation of a controlled current source are realized through modular integration and full-automatic operation design.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronics, and in particular to a method and system for improving the load capacity of a low-voltage power generation vehicle with a controlled current source. Background Art

[0002] As an important means of ensuring power supply reliability and emergency power supply in extreme situations, low-voltage generators are widely used in handling line and transformer maintenance and emergency rescue. For civil power supply, my country adopts a three-phase four-wire method. In one power supply area, the power load is connected to phases A, B, and C respectively. Due to the different time of residents' activities and the size of the load, from the perspective of the power supply area, the load is always three-phase unbalanced. In recent years, with the popularization of household appliances, the civil power load has surged, further aggravating the problem of three-phase load imbalance. In the process of using low-voltage generators to provide emergency power supply to residential users, the power supply capacity of diesel generators is far less than the power supply capacity of the power grid. The three-phase imbalance problem of civil power load will seriously affect the normal operation of diesel generators.

[0003] In view of the above-mentioned technical deficiencies, the present invention proposes a hardware structure design scheme with a three-phase bridge controlled current source as the core, which fundamentally alleviates the three-phase imbalance problem by adjusting the load characteristics in real time and establishing an efficient energy fusion mechanism. The hardware design of the present invention is based on the three-phase bridge controlled current source, combined with modular integration and fully automated operation technology, to achieve intelligent management of the emergency power supply system. By accurately controlling the current output of the three-phase bridge controlled current source, the energy distribution between loads can be dynamically adjusted to avoid single-phase load overload. At the same time, an energy fusion mechanism is established so that the electric energy between different phase loads can be flexibly transferred and shared, thereby achieving dynamic balance of the three-phase load. This mechanism can not only improve the output efficiency of diesel generators, but also effectively extend the service life of the equipment, reduce line losses, and improve the reliability of emergency power supply.

[0004] In system operation, the modular design makes the hardware structure highly scalable and easy to maintain; and the fully automated operation greatly reduces the complexity of manual operation. Through the intervention of intelligent algorithms, parameters can be quickly adjusted when the load changes to ensure the smooth operation of the power supply system. This integrated hardware and software design provides a new solution for three-phase load balancing, which is not only suitable for emergency power supply scenarios of low-voltage generators, but also has important reference value for the optimization of traditional distribution systems. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the technical problem solved by the present invention is: to solve the problems of reduced generator capacity, voltage asymmetry, increased line loss and decreased operating stability caused by three-phase load imbalance during emergency power supply of low-voltage generator vehicles; a method for improving the load capacity of low-voltage generator vehicles based on a controlled current source, by proposing a hardware structure design with a three-phase bridge controlled current source as the core, combined with modular and automated implementation methods, the present invention significantly improves the reliability and efficiency of the emergency power supply system.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source, comprising: designing a three-phase bridge controlled current source hardware structure; adjusting the load characteristics according to the hardware structure; establishing an energy fusion mechanism according to the load characteristics; and modularizing and fully automating the controlled current source.

[0008] As a preferred solution of the method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source described in the present invention, the hardware structure of the designed three-phase bridge controlled current source includes a three-phase full-bridge controlled current source composed of IGBT, DC support capacitor, and output reactance.

[0009] As a preferred solution of the method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source described in the present invention, the method of adjusting the load characteristics according to the hardware structure includes adjusting the load characteristics to linear, resistive, and three-phase balanced load characteristics.

[0010] As a preferred solution of the method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source described in the present invention, the establishment of an energy fusion mechanism includes establishing an energy fusion mechanism through the DC side of the controlled current source to adjust the magnitude and direction of the output current according to the load characteristics.

[0011] As a preferred solution of the method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source described in the present invention, the modular integration of the controlled current source includes: the controlled current source adopts a wall-mounted modular structure, the module is connected in parallel with the output end of the power generation vehicle, and connected to the power bus.

[0012] As a preferred solution of the method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source described in the present invention, the fully automatic operation includes that when the power generation vehicle outputs the established voltage, the controlled current source can start working and automatically adjust the three-phase current balance through a comprehensive control algorithm.

[0013] As a preferred solution of the method for improving the load capacity of a low-voltage generator vehicle with a controlled current source described in the present invention, the comprehensive control algorithm includes: real-time monitoring of the load state, obtaining real-time data of load changes, analyzing the imbalance degree and nonlinear dynamic characteristics of the three-phase load, controlling the output current size and direction of the controlled current source, maintaining the balance of the three-phase current, adjusting the duty cycle of the controlled current source through pulse width modulation, and optimizing the load characteristics.

[0014] Another object of the present invention is to provide a low-voltage generator vehicle load capacity enhancement system with a controlled current source, which can break the obstacles to enterprise innovation and development by optimizing the mechanism for transforming scientific and technological achievements.

[0015] In order to solve the above technical problems, the present invention provides the following technical solutions: A system for improving the load capacity of a low-voltage power generation vehicle with a controlled current source, characterized by comprising: a hardware design module, a load characteristic adjustment module, an energy fusion mechanism establishment module and an automation module;

[0016] The hardware design module designs the hardware structure of the three-phase bridge controlled current source;

[0017] The load characteristic adjustment module adjusts the load characteristic according to the hardware structure;

[0018] The energy fusion mechanism establishment module establishes the energy fusion mechanism according to the load characteristics;

[0019] The automation module performs modular integration and fully automated operation of the controlled current source.

[0020] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method for improving the load capacity of a low-voltage generator vehicle with a controlled current source as described above are implemented.

[0021] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source as described above.

[0022] The beneficial effects of the present invention are as follows: by designing the hardware structure of a three-phase bridge controlled current source, the ability to accurately control the three-phase current output is achieved, high flexibility and scalability are provided, the system can adapt to a variety of loads and power supply scenarios, the complexity of the hardware structure design is reduced, and subsequent maintenance costs are reduced through modular hardware solutions.

[0023] By utilizing the hardware capabilities of the three-phase bridge controlled current source, the load characteristics are dynamically adjusted to optimize the load distribution and power factor, thereby alleviating the three-phase imbalance problem and improving the power supply efficiency and reliability of the system.

[0024] By analyzing the adjusted load characteristics and establishing an energy integration mechanism, dynamic energy sharing and transfer between different phases is achieved, further optimizing the three-phase load balance.

[0025] Through modular integration and fully automated operation design, rapid deployment and intelligent operation of the controlled current source are achieved, reducing manual intervention and operational complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 A flow chart of a method for improving the load capacity of a low-voltage generator vehicle with a controlled current source provided by an embodiment of the present invention.

[0028] Figure 2 A hardware structure diagram of a method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] Example 1

[0032] Reference Figure 1-Figure 2 , which is an embodiment of the present invention, a method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source, comprising:

[0033] S1: Design the hardware structure of the three-phase bridge controlled current source.

[0034] It should be noted that the design of the hardware structure of the three-phase bridge controlled current source includes that the three-phase full-bridge controlled current source is composed of IGBT, DC support capacitors, and output reactance.

[0035] Furthermore, the three-phase bridge controlled current source is composed of 6 IGBTs (insulated gate bipolar transistors), 2 DC support capacitors, and 3 output reactances, such as Figure 2 These components form a complete three-phase bridge structure, and the power electronics technology is used to achieve precise control of the current. Specifically, the duty cycle of the three-phase bridge output voltage is controlled by the pulse width modulation (PWM) technology to adjust the output characteristics of the controlled current source. The controlled current source output voltage works together with the output voltage of the diesel generator to adjust the size and direction of the inflow or outflow current. The three-phase current is independently controlled with the load balance as the goal, and the three-phase load balance is achieved by dynamically adjusting the output current.

[0036] S2: Adjust the load characteristics according to the hardware structure.

[0037] It should be noted that, according to the hardware structure, adjusting the load characteristics includes adjusting the load characteristics to linear, resistive, and three-phase balanced load characteristics.

[0038] Furthermore, by adjusting the output current of the current source in real time, the nonlinear component in the load is eliminated, so that the load shows a current change relationship proportional to the voltage. The phase of the current source is adjusted to make the load current and voltage in phase, presenting an ideal resistive load characteristic and reducing the impact of reactive power. By independently controlling the three-phase output current, the imbalance problem of the three-phase load is eliminated, ensuring the symmetry of the three-phase current amplitude and phase.

[0039] Furthermore, for the three-phase loads A, B, and C, dynamic balance is achieved by controlling the target value setting and feedback adjustment. According to the impulse equivalent principle, the output voltage UA1 of the controlled current source is determined by the duty cycle of the pulse width modulation wave, and the grid connection point voltage UA2 is determined by the output voltage of the diesel generator. Therefore, by adjusting the pulse width modulation ratio, the size of UA1 can be changed, thereby determining the size and direction of the current flowing into or out of the controlled current source. Assume that the three-phase load currents are Ia, I b ,I c , the current when the three phases are balanced is I eq ,but

[0040]

[0041] The control target value of phase A current is: ΔI a =I eq -I a , the control target value of phase B current is: ΔI b =I eq -I b, the control target value of phase C current is ΔI c =I eq -I c . The A phase current Ia is smaller than the B phase current I b Take the unbalance compensation produced as an example, from the diesel generator outlet side, I a +I ca =I eq , I b +I cb =I eq , the three-phase current is completely balanced. The energy flow diagram is as follows Figure 2 shown.

[0042] S3: Establish energy integration mechanism according to load characteristics.

[0043] It should be noted that establishing an energy fusion mechanism includes establishing an energy fusion mechanism through the DC side of the controlled current source and adjusting the magnitude and direction of the output current according to the load characteristics.

[0044] Furthermore, the core part of the DC side integration channel is the energy storage link composed of DC support capacitors. The function of these capacitors is to temporarily store energy and provide buffering for the dynamic energy demand of the system to ensure the continuity and stability of the current source output. The DC side channel is connected to the three-phase bridge controlled current source, and the DC voltage level is adjusted to balance the load fluctuations on the AC side and the changes in system supply and demand. When the load increases suddenly, the DC side integration channel will release the stored energy to quickly compensate for the insufficient power at the AC output end, thereby maintaining the stability of the system voltage. On the contrary, when the load demand decreases, the excess energy flows back to the DC side through the three-phase bridge and is stored by the energy storage capacitor. This bidirectional regulation mechanism greatly improves the response speed and energy utilization efficiency of the system. The operation of the DC side integration channel is managed by a set of intelligent control algorithms to monitor key parameters such as DC voltage and current in real time. When the load changes, the control system adjusts the pulse width modulation (PWM) duty cycle of the three-phase bridge to make the DC side energy flow in or out smoothly, ensuring the dynamic balance of the entire system. The DC side integration channel can respond to load changes with extremely low time delay, especially in complex nonlinear load environments, significantly reducing the power supply instability caused by load fluctuations. In addition, the design of the integration channel significantly enhances the system's load-carrying capacity, which not only meets the needs of the three-phase unbalanced load of the civil power grid, but also reduces the fuel consumption of the generator vehicle during operation.

[0045] S4: Modular integration and fully automated operation of controlled current sources.

[0046] It should be noted that modular integration of the controlled current source includes that the controlled current source adopts a wall-mounted modular structure, the module is connected in parallel with the output end of the power generation vehicle, and is connected to the power bus.

[0047] The controlled current source adopts a wall-mounted modular structure design, which makes it easy to install and flexible in layout. This modular design is suitable for the limited space conditions inside the low-voltage power generation vehicle, while ensuring the functional independence and scalability of the equipment, which is convenient for later maintenance and upgrades. Each module is directly connected in parallel with the output end of the power generation vehicle through a dedicated interface, and the modules can be flexibly expanded in parallel to meet the needs of different power levels. By connecting the module to the power bus of the power generation vehicle, the controlled current source can directly participate in the distribution and regulation of electric energy, ensuring a rapid response to changes in load demand.

[0048] Furthermore, the fully automated operation includes that, when the generator car outputs the established voltage, the controlled current source can start to work and automatically adjust the three-phase current balance through a comprehensive control algorithm.

[0049] The comprehensive control algorithm includes, through real-time monitoring of the load status, obtaining real-time data of load changes, analyzing the imbalance degree, nonlinear characteristics and dynamic characteristics of the three-phase load, controlling the output current size and direction of the controlled current source, maintaining the three-phase current balance, adjusting the duty cycle of the controlled current source through pulse width modulation, and optimizing the load characteristics.

[0050] When a stable output voltage is established at the output end of the power generation vehicle, the controlled current source automatically enters the working state without manual operation. The fully automated operation depends on the preset comprehensive control algorithm. Through the close cooperation of hardware and software, real-time adjustment of load characteristics and system balance can be achieved. The main functions of the comprehensive control algorithm include real-time monitoring, data analysis and dynamic adjustment. Detect the voltage and current state of the load, including the instantaneous current amplitude and phase of each phase; the dynamic change characteristics of the load, such as sudden increase, sudden decrease and nonlinear response of the load, use the algorithm to analyze the load state data in real time, extract the active power and reactive power components of the load, calculate the imbalance of the three-phase current, and the impact of the nonlinear load on the system, evaluate the response requirements of the system according to the fluctuation amplitude and frequency of the load state, determine the current compensation direction and size required for load adjustment, adjust the output current of the controlled current source to meet the goals of three-phase balance, linearization and resistance, and provide compensation current in time when the load fluctuates to maintain the stability of system operation.

[0051] Example 2

[0052] As an embodiment of the present invention, the present invention provides the following technical solution: a system for improving the load capacity of a low-voltage power generation vehicle with a controlled current source, comprising: a hardware design module, a load characteristic adjustment module, an energy fusion mechanism establishment module and an automation module;

[0053] The hardware design module designs the hardware structure of the three-phase bridge controlled current source;

[0054] The load characteristic adjustment module adjusts the load characteristic according to the hardware structure;

[0055] The energy fusion mechanism establishment module establishes the energy fusion mechanism according to the load characteristics;

[0056] The automation module performs modular integration and fully automated operation of the controlled current source.

[0057] This embodiment further provides a computing device, which is applicable to a method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source, including:

[0058] Memory and processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement a method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source as proposed in the above embodiment.

[0059] The storage medium proposed in this embodiment and the method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source proposed in the above embodiment belong to the same inventive concept. The technical details not described in detail in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0060] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0061] Logic and / or steps otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch instructions from and execute instructions on, an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0062] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. 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. A method for improving the load capacity of a low-voltage generator vehicle with a controlled current source, characterized in that: include: Design the hardware structure of the three-phase bridge controlled current source; Adjust load characteristics according to hardware structure; Establish energy financing mechanism according to load characteristics; Modular integration and fully automated operation of controlled current sources.

2. A method for improving the load capacity of a low-voltage generator vehicle with a controlled current source as claimed in claim 1, characterized in that: The designed three-phase bridge controlled current source hardware structure includes: the three-phase full-bridge controlled current source is composed of IGBT, DC support capacitor and output reactance.

3. A method for improving the load capacity of a low-voltage generator vehicle with a controlled current source as claimed in claim 2, characterized in that: The adjusting of the load characteristics according to the hardware structure includes adjusting the load characteristics to linear, resistive, and three-phase balanced load characteristics.

4. A method for improving the load capacity of a low-voltage generator vehicle with a controlled current source as claimed in claim 3, characterized in that: The establishing of the energy fusion mechanism includes establishing an energy fusion mechanism through the DC side of the controlled current source and adjusting the magnitude and direction of the output current according to the load characteristics.

5. The method for improving the load capacity of a low-voltage generator vehicle with a controlled current source as claimed in claim 4, characterized in that: The modular integration of the controlled current source includes: the controlled current source adopts a wall-mounted modular structure, the module is connected in parallel with the output end of the power generation vehicle, and is connected to the power bus.

6. A method for improving the load capacity of a low-voltage generator vehicle with a controlled current source as claimed in claim 5, characterized in that: The fully automated operation includes that when the generator car outputs established voltage, the controlled current source can start to work and automatically adjust the three-phase current balance through a comprehensive control algorithm.

7. A method for improving the load capacity of a low-voltage generator vehicle with a controlled current source as claimed in claim 6, characterized in that: The comprehensive control algorithm includes: monitoring the load status in real time, obtaining real-time data of load changes, analyzing the imbalance degree, nonlinear characteristics and dynamic characteristics of the three-phase load, controlling the output current size and direction of the controlled current source, maintaining the three-phase current balance, adjusting the duty cycle of the controlled current source through pulse width modulation, and optimizing the load characteristics.

8. A system for increasing the load capacity of a low-voltage power generation vehicle using a controlled current source as claimed in any one of claims 1 to 7, characterized in that: include: Hardware design module, load characteristics adjustment module, energy integration mechanism establishment module and automation module; The hardware design module designs the hardware structure of the three-phase bridge controlled current source; The load characteristic adjustment module adjusts the load characteristic according to the hardware structure; The energy fusion mechanism establishment module establishes the energy fusion mechanism according to the load characteristics; The automation module performs modular integration and fully automated operation of the controlled current source.

9. 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 steps of a method for improving the load capacity of a low-voltage power generation vehicle with a controlled current source according to any one of claims 1 to 7 are implemented.

10. 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 improving the load capacity of a low-voltage power generation vehicle with a controlled current source according to any one of claims 1 to 7 are implemented.

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