A converter valve IGBT drive function simulation device

Abstract

The application relates to a converter valve IGBT drive function simulation device and belongs to the technical field of flexible high-voltage direct current transmission. The converter valve IGBT drive function simulation device composed of a logic processing unit, a man-machine interaction unit and a test case integrated module is used to test an IGBT sub-module controller. Various working conditions of a converter IGBT sub-module can be simulated through the logic processing unit and the test case integrated module, and a complex high-voltage test environment does not need to be constructed. Since the simulation mode is adopted, the application has strong compatibility and expandability, the time for constructing a test environment is saved, and the efficiency of controller testing and research and development is remarkably improved. Meanwhile, the comprehensiveness and repeatability of IGBT control and protection function verification of the sub-module controller can be enhanced, and the probability of bringing design defects of the sub-module controller control and protection function into an engineering site is reduced to the maximum extent.

Description

TECHNICAL FIELD

[0001] The present application relates to a converter valve IGBT drive function simulation device, and belongs to the technical field of flexible high-voltage direct current transmission. BACKGROUND

[0002] Flexible direct current transmission technology is a direct current transmission technology with voltage source converters as the core. Modular multi-level converter (MMC) is a key device in the flexible high-voltage direct current transmission system, and the reliability of its operation directly affects the safety and stability of the transmission system. IGBT and its driver are the core components of the modular multi-level converter (MMC) power sub-module (SM). The sub-module controller (SMC) is used to control and protect the IGBT and its driver. The correctness of the control and protection logic function is crucial for the stable operation of the flexible direct current converter. Unreasonable logic design may cause the flexible direct current transmission converter power sub-module to fail, thereby reducing the number of redundant sub-modules, and in severe cases, may cause the system to trip and shut down.

[0003] With the rapid development of new flexible direct current transmission technologies, new flexible direct current transmission topologies are constantly emerging, and high-density and high-capacity IGBT devices are widely used. The IGBT drive technology is also constantly updated, and at the same time, new requirements are put forward for the function upgrade and reliable operation of the sub-module controller. Therefore, it is necessary to detect the drive performance and reliability of the protection logic of the sub-module controller. The current detection method mainly traverses the various operating conditions of the IGBT drive of the sub-module controller by constructing a complex high-voltage test environment to verify the IGBT control and protection characteristics of the converter sub-module under various fault conditions. This method requires the construction of a complex high-voltage environment for the operation of the converter, which is high in construction cost and time-consuming. SUMMARY

[0004] The purpose of the present application is to provide a converter valve IGBT drive function simulation device to solve the problem of high cost and low efficiency caused by testing the IGBT sub-module controller by simulating the actual high-voltage environment.

[0005] The application provides a converter valve IGBT drive function simulation device to solve the above technical problems, which comprises a logic processing unit, a man-machine interaction unit and a test case integration module; the logic processing unit is used for generating test case function simulation data and performing logic processing; the man-machine interaction unit is used for providing a man-machine interface for model selection, logic control, parameter adjustment and data recording; the test case integration module comprises a state feedback unit, a load characteristic unit and a communication link unit; the state feedback unit is used for simulating the feedback of IGBT drive operating state and the characteristic response thereof; the load characteristic unit is used for simulating the steady state and transient state characteristics of IGBT drive load; and the communication link unit is used for simulating the signal and link operating characteristics of IGBT drive communication.

[0006] The application adopts the converter valve IGBT drive function simulation device comprising a logic processing unit, a man-machine interaction unit and a test case integration module to test the IGBT sub-module controller, and various working conditions of the converter IGBT sub-module can be simulated by the logic processing unit and the test case integration module without the need of constructing a complex high-voltage test environment. The application has strong compatibility and expandability due to the simulation mode, saves the time for constructing the test environment, significantly improves the efficiency of controller testing and research and development, and can enhance the comprehensiveness and repeatability of IGBT control and protection function verification of the sub-module controller, and the probability of bringing the design defects of the sub-module controller control and protection function into the engineering site is reduced to the maximum extent.

[0007] Further, the logic processing unit is in communication connection with the man-machine interaction unit and is used for receiving parameters and debugging data edited online through the man-machine interaction unit.

[0008] The application adjusts the parameters and debugging functions through the man-machine interaction unit, so that the logic processing unit can perform corresponding simulation according to the input data of the man-machine interaction unit, and the expandability of simulation is improved.

[0009] Further, the logic processing unit adopts a design architecture of FPGA+ARM.

[0010] The application adopts the design architecture of FPGA+ARM to construct the logic processing unit, so that the data and logic processing of IGBT drive test case function simulation under various operating conditions can be conveniently realized.

[0011] Further, the state feedback unit is used for completing the state feedback characteristic signals and self-defined characteristic signals of IGBT under various working conditions according to the selected model and parameters of the logic processing unit, and sending the state feedback pulses to the sub-module controller to be tested through the communication link unit.

[0012] The application generates state feedback characteristic signals of IGBT under various working conditions and special self-defined characteristic signals through a state feedback unit, thereby meeting the testing requirements of various working conditions.

[0013] Further, the load characteristic unit is used for simulating load characteristics of IGBT drive affected by switching frequency, gate short circuit and drive power supply short circuit, so as to verify the influence of load change of IGBT drive on the energy taking loop and the control logic of the sub-module controller.

[0014] The application simulates load characteristics of IGBT drive affected by various factors through the load characteristic unit, thereby helping to verify the influence of load change of IGBT drive on the energy taking loop and the control logic of the sub-module controller.

[0015] Further, the load characteristic unit adopts an electronic load which generates corresponding impedance changes under the driving of the logic processing unit, so as to realize the simulation of load characteristics under various working conditions.

[0016] The application simulates load characteristics of IGBT drive affected by various factors by using an electronic load, which can conveniently and accurately simulate the load change affected by IGBT drive.

[0017] Further, the communication link unit is used for simulating signal and link operation characteristics of IGBT drive when communication interruption, communication hardware abnormality or noise and environmental interference occur, and the communication link unit comprises a signal transmission module matched with the to-be-tested sub-module controller, the signal transmission module receives IGBT instructions from the to-be-tested sub-module controller, forwards the IGBT instructions to the logic processing unit and sends pulse signals generated by the logic processing unit to the to-be-tested sub-module controller.

[0018] The application simulates signal and link operation characteristics of IGBT drive when communication interruption, communication hardware abnormality or noise and environmental interference occur through the communication link unit, thereby realizing the testing of the sub-module controller under various signal and link operation characteristics.

[0019] Further, the communication link unit adopts a modular design.

[0020] The application adopts a modular design concept to construct the communication link unit, so that the entire simulation system device is highly expandable. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural block diagram of the IGBT drive function simulation device of the application;

[0022] Figure 2 is a working flow chart of the IGBT drive function simulation device of the application. DETAILED DESCRIPTION

[0023] The specific embodiments of the present application are further described below with reference to the accompanying drawings.

[0024] The converter valve IGBT drive function simulation device of the present application comprises a logic processing unit, a man-machine interaction unit and a test case integration module. The logic processing unit is the core unit of the device, realizing data and logic processing of test case function simulation; the man-machine interaction unit provides man-machine interface for model selection, logic control, parameter adjustment and data recording functions; the test case integration module is composed of three units: state feedback, load characteristics and communication link: the state feedback unit is used to simulate the feedback of IGBT drive operating state and its characteristic response; the load characteristics unit is used to simulate the steady-state and transient-state characteristics of IGBT drive load; the communication link unit is used to simulate the signal and link operating characteristics of IGBT drive communication. The device of the present application can provide a comprehensive test environment for IGBT control logic test of converter valve sub-module controller, has the characteristics of high test case integration and strong function extensibility, and does not need to build a complex high-voltage test environment, which can significantly improve the efficiency of controller test and research and development.

[0025] As shown in Figure 1 The core part of the logic processing unit is a high-performance programmable logic processor, which is the core unit of the device and has information interaction with the man-machine interaction unit and the test case integration module. The design architecture of FPGA+ARM (or SOC chip) is adopted, the FLASH chip is used to store the required programs and data, and the data and logic processing of IGBT drive test case function simulation under various operating conditions are realized. The man-machine interaction unit can be realized by an industrial computer, which provides man-machine interface for model selection, logic control, parameter adjustment and data recording functions, has the functions of storage and loading of simulation models, online programming of test case parameters and rules, test data storage, analysis and test report output.

[0026] The state feedback test case unit interacts with the logic processing unit and the communication link, completes the state feedback characteristics of IGBT under normal operation, overcurrent, short circuit, drive power failure, gate failure, high-frequency conduction, narrow pulse or dead zone and other conditions, as well as other self-defined characteristic signals meeting special test case requirements, according to the selected model and parameters of the logic processing unit, and sends the state feedback pulses to the sub-module controller to be tested through the communication link unit, which is monitored by the logic processing unit in real time. It can meet the needs of regular performance test, boundary condition test, stress test and concurrent fault test, and also meet the needs of self-defined test cases required for logic verification and problem troubleshooting.

[0027] The physical implementation of the load characteristic test case unit adopts a programmable electronic load, and the characteristic data of the established model is temporarily stored in the buffer of the logic processing unit by using a lookup table method. During simulation, the logic processing unit drives the electronic load to generate corresponding impedance changes, so as to realize the simulation of the load characteristics of the IGBT drive affected by factors such as switching frequency, gate short circuit and drive power supply short circuit, and the real-time monitoring of the impedance of the electronic load is completed by the logic processing unit.

[0028] The communication link unit is used for simulating the signal and link operation characteristics of the IGBT drive when communication interruption, communication hardware abnormality or noise and environmental interference occur. The communication link unit includes a signal transmission module matched with the sub-module device. The signal transmission module receives the IGBT instruction from the sub-module controller, forwards it to the logic processing unit, and sends the pulse signal generated by the logic processing unit to the sub-module controller to be tested. The communication link unit is realized by a signal interference source based on FPGA and a communication link. The logic processing unit realizes the simulation of the signal and link operation characteristics of the IGBT drive when communication interruption, communication hardware abnormality or noise and environmental interference occur by controlling the on-off of the communication link unit, adjusting the light emitting power and controlling the interference signal. The communication link unit can be designed in a modular manner and has strong scalability. The signal transmission module can be expanded to meet the test requirements of multiple models and multiple versions of sub-module controllers.

[0029] The present application adopts three test case units including state feedback, load characteristics and communication link, which cover the working condition requirements of controller testing and research and development. Not only the working conditions of conventional performance testing, boundary condition testing, stress testing and concurrent fault testing are included, but also special test working conditions defined by the user are included, so that the functional test covers the comprehensive requirements.

[0030] As shown in Figure 2 The converter valve IGBT drive function simulation device of the present application can select a model and a test case in the man-machine interaction unit, download it to the FPGA of the logic processing unit, and set parameters and start and stop control instructions through the interface of the man-machine interaction unit. After the simulation starts, the FPGA can obtain the real-time running data of the test case integrated units. The data will be packaged in the ARM program, and then the packaged data will be sent to the man-machine interaction unit through Ethernet. The man-machine interaction unit analyzes and stores the simulation data. During the simulation process, the communication link unit communicates with the sub-module controller in real time, and the driving performance and protection logic reliability of the sub-module controller can be comprehensively evaluated through the sub-module controller function tester or oscilloscope and other devices.

[0031] In summary, the functional simulation device provided by the application has the characteristics of high integration of test cases, strong compatibility and scalability, and comprehensive functional test coverage. Specifically, the device introduces a platform design concept, abstracts the test case body and parameters, and is more easily adapted to different test objects by updating the parameter set, achieving the purpose of accumulation and reuse of test cases, and meeting the requirement of high integration of test cases. The device supports the simulation of state feedback characteristics, load characteristics and communication link characteristics of multiple types of drivers, and can meet the test requirements of multiple types and multiple versions of sub-module controllers. The driver model and controller type can be switched through the man-machine interaction unit. The device can have online parameter editing and real-time debugging functions through the man-machine interaction unit to increase the simulation function of new drivers. The communication link unit adopts modular design, and the signal transmission module can be expanded to meet the test requirements of multiple types and multiple versions of sub-module controllers.

[0032] The application can make the sub-module controller traverse the operating conditions of IGBT drive without damaging the device and without constructing a complex high-voltage test environment, and verify the IGBT control protection characteristics of the converter valve sub-module under various fault conditions. The application has strong compatibility and scalability, saves the time of constructing a test environment, and significantly improves the efficiency of controller testing and research and development. The application can enhance the comprehensiveness and repeatability of IGBT control and protection function verification of the sub-module controller, and maximally reduce the probability of bringing design defects of the sub-module controller control and protection function into the engineering site.

[0033] It should be understood that the above specific embodiments of the application are only used for illustrative or explanatory purposes of the principles of the application, and do not constitute a limitation of the application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the application shall be included in the protection scope of the application. In addition, the appended claims of the application are intended to cover all variations and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A converter valve IGBT drive function emulation device, characterized by, The simulation device comprises a logic processing unit, a man-machine interaction unit and a test case integration module; the logic processing unit is used for information interaction with the man-machine interaction unit and the test case integration module, downloading models, test cases and parameters of the man-machine interaction unit, generating test case function simulation data and performing logic processing; the man-machine interaction unit is used for providing a man-machine interface for model selection, test case selection, parameter setting, logic control, parameter adjustment and data recording; the test case integration module comprises a state feedback unit, a load characteristic unit and a communication link unit; the state feedback unit is used for simulating feedback of running states of the IGBT drive and characteristic responses thereof according to selected models and parameters of the logic processing unit; The load characteristic unit is used for simulating steady-state and transient-state characteristics of the IGBT drive load; and the communication link unit is used for simulating signal and link running characteristics of the IGBT drive communication.

2. The inverter valve IGBT drive function emulation device according to claim 1, characterized in that, The logic processing unit is also used for receiving parameters and debugging data edited online through the man-machine interaction unit.

3. The inverter valve IGBT drive function emulation device according to claim 2, characterized in that, The logic processing unit adopts a design architecture of FPGA+ARM.

4. The inverter valve IGBT drive function emulation apparatus according to claim 1, characterized by, The state feedback unit is used for completing state feedback characteristic signals and self-defined characteristic signals of the IGBT under various working conditions according to selected models and parameters of the logic processing unit, and sending state feedback pulses to a to-be-tested sub-module controller through the communication link unit.

5. The inverter valve IGBT drive function emulation apparatus according to claim 1, characterized by, The load characteristic unit is used for simulating load characteristics of the IGBT drive affected by a switching frequency, gate short circuit and drive power supply short circuit, so as to verify influences of load changes of the IGBT drive on a power take-off loop and control logic of the sub-module controller.

6. The inverter valve IGBT drive function emulation device according to claim 5, characterized in that, The load characteristic unit adopts an electronic load which generates corresponding impedance changes under driving of the logic processing unit, so as to realize simulation of load characteristics under various working conditions.

7. The thyristor IGBT drive function emulation device according to claim 1 or 2, characterized in that, The communication link unit is used for simulating signal and link running characteristics of the IGBT drive when communication interruption, communication hardware abnormality or noise and environmental interference occur, and the communication link unit comprises a signal transmission module matched with the to-be-tested sub-module controller; the signal transmission module receives IGBT instructions from the to-be-tested sub-module controller, forwards the IGBT instructions to the logic processing unit and sends pulse signals generated by the logic processing unit to the to-be-tested sub-module controller.

8. The inverter valve IGBT drive function emulation device according to claim 7, characterized in that, The communication link unit adopts a modular design.

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