High-performance bidirectional ACDC experimental platform

Abstract

The utility model discloses a high-performance bidirectional ACDC experimental platform, which belongs to the technical field of power electronic equipment and comprises a three-phase power grid, an air switch, a plurality of AC voltage sensors, a plurality of DC voltage sensors, a cold starter, an IGBT (insulated gate bipolar transistor) group, a core controller board, an expansion board and a signal conversion board. The platform is controlled through an STM32H743IIT6 processor, and efficient conversion from three-phase alternating current to direct current is achieved. The system adopts an LCL filter to improve the quality of electric energy, is compatible with various loads, and controls the working state of the IGBT through an optocoupler and a driver. The platform is suitable for various high-performance power electronic experiments, has the characteristics of high efficiency, stability and intelligence, and solves the problems of large energy loss, complex control, poor adaptability and the like of traditional ACDC conversion equipment.

Description

Technical Field

[0001] The utility model belongs to the field of power electronic devices, and particularly relates to a high-performance bidirectional ACDC experimental platform. Background Art

[0002] The current ACDC conversion devices on the market are widely used in various fields of power electronics and electrical engineering. However, with the continuous development of technology and the improvement of application requirements, traditional ACDC conversion devices have exposed some significant deficiencies and limitations, which are specifically reflected in the following aspects:

[0003] 1. Low conversion efficiency:

[0004] ο Energy loss: When traditional ACDC conversion devices perform power conversion, they will generate relatively large energy losses, mainly manifested in conduction losses, switching losses, and other inevitable losses during the power transmission process. These energy losses not only reduce the overall efficiency of the device but also increase the operating cost.

[0005] ο Thermal management problem: Due to the low conversion efficiency, the device will generate a large amount of heat during operation. If these heats cannot be dissipated in a timely and effective manner, it will affect the stability and lifespan of the device. Therefore, an additional heat dissipation system is required, which further increases the complexity and cost of the device.

[0006] 2. Poor adaptability:

[0007] ο Load adaptability: Traditional ACDC conversion devices have poor adaptability to different types of loads and are difficult to flexibly switch between inductive, capacitive, and resistive loads. This limitation makes the device perform poorly in the face of complex load environments.

[0008] ο Grid adaptability: The fluctuations and harmonic pollution of the power grid pose higher requirements for ACDC conversion devices. Traditional devices often struggle to cope with these problems and are easily affected by the power grid quality, resulting in low output power quality.

[0009] 3. Large device volume and high cost:

[0010] ο Complex structure: Due to the need for multiple control modules and complex heat dissipation systems, the volume of traditional ACDC conversion devices is relatively large, which is not conducive to integration and installation. In addition, the complex structure also means higher manufacturing and maintenance costs.

[0011] ο Material and manufacturing costs: High-efficiency conversion requires high-quality semiconductor devices and other electronic components, which increases the material cost of the device. Coupled with the complex manufacturing process, the overall cost is relatively high.

[0012] 4. Poor reliability and stability:

[0013] ο High failure rate: Due to the complexity of the structure and control, the failure rate of traditional equipment is relatively high. Especially when operating under high load and harsh environments, various failures are likely to occur.

[0014] ο Difficult maintenance: The complex internal structure makes equipment maintenance difficult. Fault location and repair take a long time, increasing the operating cost and downtime. Summary of the Utility Model

[0015] The main purpose of the present utility model is to provide a high-performance bidirectional ACDC experimental platform, which can effectively solve the problems in the background technology.

[0016] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0017] A high-performance bidirectional ACDC experimental platform, including the following steps:

[0018] A high-performance bidirectional ACDC experimental platform, including:

[0019] · A three-phase power grid, connected by a three-phase four-wire system;

[0020] · An air switch, used to control the connection between the three-phase power grid and the IGBT group and the subsequent parts;

[0021] · Two AC voltage sensors, respectively measuring the voltages of phase B and phase C;

[0022] · Two AC current sensors, respectively measuring the currents of phase B and phase C;

[0023] · Contactor 1, connected in series in phase A, before the current sensors of phase B and phase C, used to control the connection between phase A and phase B and phase C passing through the current sensors and the IGBT group;

[0024] · Contactor 2, connected before the high-power resistor in series with phase C and phase B. Contactor 2 and the high-power resistor together form a cold starter;

[0025] · An IGBT group, connected after two capacitors. The two capacitors are in series. One end of capacitor 1 is connected to the positive pole of the IGBT group bus, one end is connected to the midpoint of the IGBT group bus, one end of capacitor 2 is connected to the midpoint of the IGBT group bus, and one end is connected to the negative pole of the IGBT group bus;

[0026] · A DC voltage sensor, respectively connected in parallel with capacitor 1 and capacitor 2;

[0027] · The core controller board uses an STM32H743IIT6 processor and is connected to the expansion board through a board-to-board interface. The expansion board is connected to an optocoupler and a driver. The contactor is controlled by the optocoupler, and the IGBT is controlled by the driver. It also includes an OLED display interface for panel display;

[0028] · The expansion board is used to carry the core controller board and expand the functions of the core controller board;

[0029] · The signal conversion board is used to convert the current signal output by the sensor into a voltage signal and send it to the expansion board.

[0030] Further, the expansion board is powered by 5V, the optocoupler is controlled by 3.3V for 24V, the driver is powered by 15V, the two contactors and all sensors are powered by 24V, and the signal conversion board is powered by 3.3V. The above 24V and 15V are provided by a switching power supply connected to 220V.

[0031] Further, the optocoupler is a linear optocoupler with the model PC817, the relay model is G2R-1-E DC24, and there is no electrical connection between the input and output of the optocoupler. The isolation between the controller and the contactor is achieved through optical coupling.

[0032] Further, the signal conversion board includes a DC voltage sensor adapter board and an AC voltage sensor adapter board. The DC voltage sensor adapter board is used to convert a 4-20mA current signal into a 0.66-3.3V voltage signal, and the AC voltage sensor adapter board is used to convert a -25mA to 25mA current signal into a 0-3.3V voltage signal. The AC current sensor adapter board is used to convert a -25mA to 25mA current signal into a 0-3.3V voltage signal.

[0033] Further, the input of the IGBT group is three-phase input, and the output is DC output. The DC output has three terminals: positive, negative, and midpoint. The IGBT group includes an LCL filter circuit for filtering and ACDC boost.

[0034] Further, the cold start is achieved through contactor 2 and a cold start resistor. When contactor 2 conducts, phases B and C are rectified uncontrollably through the diodes of the power device group, and the current impact is limited by the resistor. When the DC bus voltage rises to a certain level, contactor 1 conducts and contactor 2 closes.

[0035] Further, the DC voltage sensor adopts a resistor voltage division plus linear optocoupler isolation scheme. The AC voltage sensor adopts an LV25-NP chip to convert the AC voltage signal into a current signal output. The current sensor adopts an LAH25-NP chip to isolate and proportionally reduce the AC current signal to a +-25mA current signal output.

[0036] Furthermore, the core controller board includes a download port, power conversion (5V to 3.3V), a reset button, OLED menu buttons (two), startup selection, etc. The core controller board is connected to the expansion board through a board-to-board connector and supports plug-and-play switching.

[0037] Furthermore, the expansion board includes a PWM interface, an ADC interface, a DAC interface, a US ART communication interface, an OLED display interface, two digital input interfaces (for controlling the above optocouplers), and provides the function of power supply to the core control board (on-board B1505XT-1WR3 level conversion module).

[0038] Compared with the prior art, the present utility model has the following improvement points:

[0039] 1. Driver part

[0040] The driver part is one of the core components of the present invention, and it plays a key role in improving the performance and compatibility of the device. Specifically, the innovation of the driver part is mainly reflected in the following aspects:

[0041] 1. Compatible with multiple power devices:

[0042] ο Multiple device support: The driver design of the present invention can be compatible with multiple power devices, including IGBT (Insulated Gate Bipolar Transistor), MOSFET (Metal Oxide Semiconductor Field Effect Transistor), SiC (Silicon Carbide) devices, etc. This multiple compatibility enables the system to select the most suitable power device in different application scenarios to optimize performance and cost.

[0043] ο Intelligent selection and scheduling: The driver has the function of intelligent selection and scheduling, and can automatically select the most suitable power device to work according to the real-time load situation and working environment, improving the overall efficiency and reliability of the system.

[0044] 2. Adopt STM32H743IIT6 processor:

[0045] ο High-performance processor: STM32H743IIT6 is a high-performance microcontroller produced by STMicroelectronics, with powerful computing capabilities and rich peripheral interfaces. It uses the Arm Cortex-M7 core with a main frequency of up to 480MHz, and can process complex control algorithms and real-time data.

[0046] ο Abundant peripheral interfaces: This processor is equipped with a large number of peripheral interfaces, such as PWM (Pulse Width Modulation) interfaces, ADC (Analog-to-Digital Conversion) interfaces, DAC (Digital-to-Analog Conversion) interfaces, USART (Universal Synchronous / Asynchronous Receiver-Transmitter) interfaces, etc. These interfaces enable the processor to flexibly exchange data with other control modules and sensors, simplifying the system design.

[0047] ο Low-power characteristics: Despite its high performance, the STM32H743IIT6 processor has relatively low power consumption, which helps reduce the overall energy consumption of the system and improve energy utilization efficiency.

[0048] 3. High driving ability:

[0049] ο Fast response: The driver has the ability to respond quickly and can process and feedback input signals within microseconds, ensuring the stability and accuracy of the system when operating at high frequencies.

[0050] ο High driving current: The driver is designed to provide sufficient driving current to ensure that power devices can operate stably in high-power applications, avoiding performance degradation or failures caused by insufficient driving.

[0051] 4. Modular design:

[0052] ο Scalability: The driver adopts a modular design, making the system highly scalable. Users can flexibly configure the drive modules according to actual needs to achieve different function and performance goals.

[0053] ο Maintainability: The modular design also improves the maintainability of the system. Each module of the driver can be replaced and upgraded independently, reducing maintenance costs and time and improving the reliability of the system.

[0054] 2. Complete design method

[0055] The present invention not only has innovations in hardware design but also proposes a systematic solution in the design method to ensure the overall performance and reliability of the high-performance bidirectional ACDC experimental platform. The main innovation points include:

[0056] 1. Systematic design process:

[0057] ο Requirement analysis and scheme design: At the initial stage of design, through detailed requirement analysis, clarify the functions, performance, and application scenarios of the system. Based on these requirements, propose a preliminary design scheme and conduct feasibility analysis and technical evaluation.

[0058] ο Detailed design and prototype development: According to the scheme design, conduct detailed hardware and software design, including circuit design, PCB (printed circuit board) layout, control algorithm writing, etc. At the same time, develop a prototype for preliminary testing and verification to discover and solve problems in the design.

[0059] 2. Integrated testing and verification:

[0060] ο Function testing: Independently test each functional module of the system to ensure that each module can work properly according to the design requirements.

[0061] ο System integration testing: Integrate each module together for system-level testing. By simulating actual application scenarios, verify the overall performance and stability of the system, and discover and solve problems that occur during the integration process.

[0062] ο Environmental and reliability testing: Test the system under different environmental conditions (such as temperature, humidity, electromagnetic interference, etc.) to evaluate the reliability and durability of the system.

[0063] 3. Optimization and improvement:

[0064] ο Performance optimization: According to the test results, optimize the hardware and software design of the system to further improve the performance and efficiency of the system. For example, by adjusting drive parameters, optimizing control algorithms, improving circuit design, etc., to improve the response speed and stability of the system.

[0065] ο Fault troubleshooting and improvement: For the problems found during the testing process, conduct fault troubleshooting and improvement design to ensure the reliability and stability of the system in actual applications.

[0066] 4. Documentation and training:

[0067] ο Technical documentation: During the design process, detailed technical documentation such as design schemes, test results, and optimization measures should be recorded to ensure the traceability and reusability of the system design process.

[0068] ο User training: For the use and maintenance of the system, write operation manuals and training materials and provide them to users and maintenance personnel to ensure that they can use and maintain the system correctly. Description of the Drawings

[0069] Figure 1 This is the partial circuit diagram of the optocoupler and relay module of the present utility model;

[0070] Figure 2 This is the circuit diagram of the core controller board and the expansion board of the present utility model;

[0071] Figure 3 This is the detailed circuit diagram of the expansion board of the present utility model;

[0072] Figure 4 This is the detailed circuit diagram of the DC voltage sensor adapter board of the present utility model;

[0073] Figure 5 This is the detailed circuit diagram of the AC voltage and current sensor signal conversion board of the present utility model;

[0074] Figure 6 This is the detailed diagram of the three-phase input connection, LCL filter, and power device connection of the present utility model;

[0075] Figure 7 This is the detailed circuit diagram of the LCL filter of the present utility model;

[0076] Figure 8 This is the detailed circuit diagram of the IGBT module of the present utility model;

[0077] Figure 9 This is the detailed circuit diagram of the AC voltage sensor of the present utility model;

[0078] Figure 10 This is the detailed circuit diagram of the DC voltage sensor of the present utility model;

[0079] Figure 11 This is the detailed circuit diagram of the AC current sensor of the present utility model. Specific embodiments

[0080] To make the technical means, creative features, achieved purposes, and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0081] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0082] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0083] Embodiment

[0084] Please refer to Figure 1-2 , the present utility model provides a technical solution:

[0085] This embodiment details the specific implementation process of a high-performance bidirectional ACDC experimental platform, including the working principles of each main component and the connection relationships between them, demonstrating the working process of the system during actual operation.

[0086] I. System Structure and Composition

[0087] 1. Three-phase power grid

[0088] ο Connection method: Three-phase four-wire system.

[0089] ο Function: Provide a three-phase AC power supply to supply input power to the system.

[0090] 2. Air switch

[0091] ο Function: Control the connection between the three-phase power grid and the IGBT group and subsequent parts in the system, and protect the system to automatically disconnect in case of current overload or short circuit.

[0092] 3. AC voltage sensor

[0093] ο Quantity: Two.

[0094] ο Measurement object: Measure the voltages of phase B and phase C respectively.

[0095] ο Function: Monitor the input voltage of the system and output real-time voltage data.

[0096] 4. AC current sensor

[0097] ο Quantity: Two.

[0098] ο Measurement object: Measure the currents of phase B and phase C respectively.

[0099] ο Function: Monitor the input current of the system and output real-time current data.

[0100] 5. Contactor

[0101] ο Contactor 1: Connected in series in phase A, after the current sensors of phase B and phase C, used to control the connection between phase A and phase B and phase C passing through the current sensors and the IGBT group.

[0102] ο Contactor 2: Connected before the high-power resistor in series with phase C and phase B, and together with the high-power resistor forms a cold starter to prevent current impact during system startup.

[0103] 6. IGBT group

[0104] ο Composition: It consists of power devices (such as IGBTs, MOSFETs, SiC devices) and an LCL filtering section.

[0105] ο Function: To achieve the conversion of three-phase alternating current to direct current.

[0106] ο Connection method: The IGBT group is connected before two series-connected capacitors.

[0107] 7. Capacitor

[0108] ο Quantity: Two, connected in series.

[0109] ο Connection method: One end of capacitor 1 is connected to the positive pole of the IGBT group bus, and the other end is connected to the midpoint of the bus; one end of capacitor 2 is connected to the midpoint of the bus, and the other end is connected to the negative pole of the bus.

[0110] ο Function: To smooth the output voltage for filtering.

[0111] 8. DC voltage sensor

[0112] ο Quantity: Two.

[0113] ο Connection method: They are respectively connected in parallel with capacitor 1 and capacitor 2.

[0114] ο Function: To monitor the DC bus voltage and output real-time data.

[0115] 9. Core controller board

[0116] ο Processor: STM32H743IIT6.

[0117] ο Function: To process signals from sensors, control the working states of contactors and IGBTs, and display the system status through an OLED display screen.

[0118] ο Interface: It is connected to the expansion board through a board-to-board interface, supporting plug-and-play switching.

[0119] 10. Expansion board

[0120] ο Function: To expand the functions of the core controller board, including PWM interface, ADC interface, DAC interface, USART communication interface, OLED display screen interface, and two digital input / output interfaces.

[0121] ο Function: To work in cooperation with the core controller board to process more external signals and control tasks.

[0122] 11. Signal conversion board

[0123] ο Function: To convert the current signals output by AC and DC voltage sensors and current sensors into voltage signals for processing by the core controller board.

[0124] II. Working Principle and Process

[0125] 1. System Startup

[0126] ο Turn on the air switch, connecting the three-phase power grid to each component of the system.

[0127] ο The core controller board controls the conduction of contactor 2 through an optocoupler, enabling uncontrolled rectification of phases B and C through high-power resistors to initially charge two capacitors and avoid startup current surges.

[0128] 2. Cold Startup

[0129] ο When the DC bus voltage reaches a certain value, the core controller board closes contactor 2 and opens contactor 1, connecting the three-phase power grid to the IGBT group through current sensors and entering the normal operating state.

[0130] 3. Voltage and Current Monitoring

[0131] ο The AC voltage sensor measures the voltages of phases B and C in real time, and the data is transmitted to the core controller board through the AC voltage sensor adapter board.

[0132] ο The AC current sensor measures the currents of phases B and C in real time, and the data is transmitted to the core controller board through the AC current sensor adapter board.

[0133] ο The DC voltage sensor monitors the DC voltage across the capacitors in real time, and the data is transmitted to the core controller board through the DC voltage sensor adapter board.

[0134] 4. Power Conversion

[0135] ο The IGBT group receives the three-phase power grid input and performs AC to DC conversion.

[0136] ο The converted direct current is filtered by capacitors and then output for use by the load.

[0137] 5. Real-time Control

[0138] ο The core controller board adjusts the switching state of the IGBT group in real time according to the sensor data to optimize the power conversion efficiency.

[0139] ο Controls the operating frequency of the IGBT through the PWM interface to ensure the stability and efficiency of the system under different load conditions.

[0140] 6. Display and Interaction

[0141] ο The OLED display screen shows the system status in real time, including information such as input and output voltages, currents, and system operating modes.

[0142] The user can perform system settings and parameter adjustments through the menu buttons on the core controller board.

[0143] 7. Fault protection

[0144] The system has multiple protection mechanisms, including overcurrent protection, overvoltage protection, and overtemperature protection.

[0145] In case of a fault, the core controller board closes the power device group through the driver, cuts off Contactor 1 and Contactor 2, and protects the safety of each component of the system.

[0146] III. Example operation

[0147] 1. Startup process

[0148] The user turns on the air switch, and the system enters the cold startup mode. The startup current is limited through Contactor 2 and high-power resistors.

[0149] When the capacitor charging is completed, the system enters the normal working state, Contactor 1 conducts, and Contactor 2 closes.

[0150] 2. Normal operation

[0151] The system starts to monitor the three-phase grid input voltage and DC output voltage in real time and performs efficient conversion through the IGBT group.

[0152] The core controller board adjusts the working state of the IGBT group in real time according to the sensor data to ensure stable and efficient output.

[0153] 3. Load change

[0154] When the load changes, the system automatically adjusts the switching frequency and working mode of the IGBT group to maintain the stability of the output voltage.

[0155] The core controller board adjusts the working state of the IGBT group through PWM signals to adapt to different types of loads (capacitive, inductive, resistive, and mixed loads).

[0156] 4. Fault handling

[0157] When the system detects abnormal conditions such as overcurrent, overvoltage, or overtemperature, the core controller board closes the power device group through the driver, cuts off Contactor 1 and Contactor 2, stops the system operation, and ensures safety.

[0158] The user can view the fault information through the OLED display screen and perform fault troubleshooting and system restart.

[0159] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high-performance bidirectional AC-DC experimental platform, characterized in that, Including: · A three-phase power grid, connected by a three-phase four-wire system; · An air switch, used to control the connection between the three-phase power grid and the IGBT group and subsequent parts; · Two AC voltage sensors, respectively measuring the voltages of phase B and phase C; · Two AC current sensors, respectively measuring the currents of phase B and phase C; · Contactor 1, connected in series in phase A, before the current sensors of phase B and phase C, used to control the connection between phase A and phases B and C passing through the current sensors and the IGBT group; · Contactor 2, connected before the high-power resistors in series with phase C and phase B, and the Contactor 2 and the high-power resistors together form a cold starter; · An IGBT group, connected after two capacitors, and the two capacitors are in series; where one end of capacitor 1 is connected to the positive pole of the IGBT group bus, one end is connected to the midpoint of the IGBT group bus, one end of capacitor 2 is connected to the midpoint of the IGBT group bus, and one end is connected to the negative pole of the IGBT group bus; · Two DC voltage sensors, respectively connected in parallel with capacitor 1 and capacitor 2; · A core controller board, using an STM32H743IIT6 processor, connected to an expansion board through a board-to-board interface. The expansion board is connected to an optocoupler and a driver, controls the contactor through the optocoupler, controls the IGBT through the driver, and includes an OLED display interface for panel display; · An expansion board, used to carry the core controller board and expand the functions of the core controller board; · A signal conversion board, used to convert the current signal output by the sensor into a voltage signal and send it to the expansion board.

2. The high-performance bidirectional ACDC experimental platform according to claim 1, characterized in that The expansion board is powered by 5V, the optocoupler is controlled by 3.3V for 24V, the driver is powered by 15V, the two contactors and all sensors are powered by 24V, and the signal conversion board is powered by 3.3V. The above 24V and 15V are provided by a switching power supply connected to 220V.

3. A high-performance bidirectional AC-DC experimental platform according to claim 1, characterized in that, The optocoupler is a linear optocoupler, with the model PC817. The optocoupler is a G2R-1-EDC24 type relay. There is no electrical connection between the input and output of the optocoupler, and the isolation between the controller and the contactor is achieved through optical coupling.

4. A high-performance bidirectional AC-DC experimental platform according to claim 1, characterized in that, The signal conversion board includes a DC voltage sensor adapter board, an AC current sensor conversion board, and an AC voltage sensor adapter board. Among them, the DC voltage sensor adapter board is used to convert a 4-20mA current signal into a 0.66-3.3V voltage signal, the AC voltage sensor adapter board is used to convert a -25mA to 25mA current signal into a 0-3.3V voltage signal, and the AC current sensor adapter board is used to convert a -25mA to 25mA current signal into a 0-3.3V voltage signal.

5. A high-performance bidirectional AC-DC experimental platform according to claim 1, characterized in that The input of the IGBT group is three-phase input, and the output is DC output. The DC output has three terminals: positive pole, negative pole, and midpoint. The IGBT group includes an LCL filter circuit for filtering and ACDC boost.

6. The high-performance bidirectional AC-DC experimental platform according to claim 1, characterized in that, The cold starter is realized through Contactor 2 and a cold start resistor. When Contactor 2 is turned on, phases B and C are rectified uncontrollably through the diodes of the power device group, and the current impact is limited through the connected resistors. When the DC bus voltage rises to a certain level, Contactor 1 is turned on and Contactor 2 is turned off.

7. A high-performance bidirectional AC-DC experimental platform according to claim 1, characterized in that, The DC voltage sensor adopts a resistor voltage division plus linear optocoupler isolation scheme. The AC voltage sensor uses an LV25-NP chip to isolate the AC voltage signal and scale it down proportionally to +-25mA current signal output. The current sensor uses an LAH25-NP chip to isolate the AC current signal and scale it down proportionally to +-25mA current signal output.

8. A high-performance bidirectional AC-DC experimental platform according to claim 1, characterized in that, The core controller board includes a download port, a power conversion from 5V to 3.3V, a reset button, two OLED menu buttons, and a startup selection. The core controller board is connected to the expansion board through a board-to-board connector and supports plug-and-play switching.

9. A high-performance bidirectional AC-DC experimental platform according to claim 8, characterized in that, The expansion board includes a PWM interface, an ADC interface, a DAC interface, a USART communication interface, an OLED display interface, and two digital input / output interfaces for controlling the above-mentioned optocouplers. The function of supplying power to the core control board is realized through an on-board B1505XT-1WR3 level conversion module.

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