A thyristor control unit testing system and method

Abstract

The application discloses a thyristor control unit test system and method, and belongs to the field of power system testing. The method comprises the following steps: deciding test execution parameters of a debugging instrument based on acquired parameter information of a thyristor control unit; generating analog quantity input for thyristor control unit test through a program-controlled source based on the test execution parameters of the debugging instrument; and performing thyristor control unit test through the debugging instrument and a power load plug-in based on the analog quantity input; wherein the thyristor control unit test comprises forward normal trigger characteristic test and on-state protection and reverse recovery characteristic test; and when the thyristor control unit test is performed, test data of the thyristor control unit collected by the debugging instrument is used to generate a thyristor control unit test result. The application can realize automatic test of the thyristor control unit, and the test is efficient and convenient, and can be applied to in-plant single-plug production batch test.

Description

Technical Field

[0001] This invention belongs to the field of power system testing, specifically relating to a thyristor control unit testing system and method. Background Technology

[0002] The Thyristor Control Unit (TCU) module is used to drive, monitor, and protect thyristors in DC valves. It corresponds one-to-one with a thyristor and is a key unit that constitutes a DC valve and determines its performance, reliability, and safety. Therefore, it is necessary to ensure that each thyristor control unit in the converter valve is tested to ensure that the electrical performance of the thyristor meets the design requirements and improves the reliability of DC power transmission projects and the safety of equipment.

[0003] Existing technologies for testing TCU modules have two main drawbacks: First, the sheer number of TCU modules in a single DC valve project necessitates manual testing methods that require manual control of external stimuli and the use of an oscilloscope to capture signals. Completing a single module test is extremely time-consuming, significantly impacting project schedules and increasing costs. Second, the loop control and logic calculations of TCU modules are complex, demanding high levels of expertise in circuit analysis and test result interpretation. Current methods cannot meet the testing requirements for mass production of TCU modules with short lead times. Summary of the Invention

[0004] The purpose of this invention is to provide a thyristor control unit testing system and method. By using a highly integrated thyristor control unit testing system with a debugger and power load plug-in to reduce the complexity of the testing system, the invention achieves efficient testing of the hardware functions of the TCU plug-in.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution.

[0006] On one hand, the present invention provides a thyristor control unit testing system, including a data acquisition module, a thyristor control unit testing module, and a testing cabinet;

[0007] The data acquisition module is used to acquire parameter information of the thyristor control unit;

[0008] The thyristor control unit test module includes a power load plug-in, a debugger, and a programmable source.

[0009] The test cabinet is connected to the input terminal of the programmable source to provide AC / DC power signals, and the output terminal of the programmable source is connected to the control unit of the thyristor under test through a power load plug-in to provide analog input for testing the thyristor control unit according to the test execution parameters output by the debugger;

[0010] The debugging instrument is used to determine the test execution parameters based on the parameter information of the thyristor control unit, and to perform thyristor control unit testing using analog inputs, thereby generating thyristor control unit test results.

[0011] Optionally, pneumatic equipment may also be included.

[0012] The debugging instrument is connected to the data acquisition module, power load plug-in, programmable source and thyristor control unit under test via pneumatic equipment for information exchange, and uses pneumatic equipment to collect test data of thyristor control unit.

[0013] Optionally, the data acquisition module includes a barcode scanner and an industrial controller; the pneumatic equipment includes a testing fixture, an electrical circuit, and a gas circuit.

[0014] The debugging device is connected to the barcode scanner and the industrial controller via an electrical circuit. The control signal output by the industrial controller drives the barcode scanner to collect parameter information of the thyristor control unit. The parameter information includes the plug-in serial number, plug-in model, hardware version and production date.

[0015] The industrial controller is connected to pneumatic equipment and is used to control the output of mechanical power from the gas circuit;

[0016] The gas circuit is connected to the test fixture and is used to drive the movement of the test fixture.

[0017] Optionally, the power load plug-in includes a high-voltage circuit, and the output terminal of the programmable source is connected to the thyristor control unit through the high-voltage circuit for transmitting analog input to the thyristor control unit for testing;

[0018] The high-voltage circuit includes a thyristor control unit energy extraction branch, a thyristor control unit sampling branch, and a thyristor control unit grounding branch;

[0019] One end of the power extraction branch of the thyristor control unit is connected to the programmable source, and the other end is connected to the power extraction terminal of the thyristor control unit.

[0020] One end of the sampling branch of the thyristor control unit is connected to the programmable source, and the other end is connected to the sampling terminal of the thyristor control unit.

[0021] One end of the grounding branch of the thyristor control unit is connected to the programmable source, and the other end is connected to the grounding terminal of the thyristor control unit.

[0022] Optionally, the power load module further includes a low-voltage equivalent circuit; the low-voltage equivalent circuit is connected to the commissioning instrument via a pneumatic device for information exchange.

[0023] The low-voltage equivalent circuit includes a parallel voltage equalizing resistor and a high-voltage relay. The parallel voltage equalizing resistor is connected in parallel to the sampling branch of the thyristor control unit in the high-voltage circuit through the high-voltage relay.

[0024] Optionally, the debugging instrument includes an LCD module for inputting parameter information of the thyristor control unit.

[0025] Optionally, the debugger may further include a digital signal processing module, a backplane module, and a sampling module;

[0026] The liquid crystal module is disposed on one side of the back panel module, and the digital signal processing module and the sampling module are disposed on the other side of the back panel module;

[0027] The digital signal processing plugin is used to perform test logic operations on the thyristor control unit based on the test data of the thyristor control unit collected by the sampling plugin through pneumatic equipment.

[0028] Secondly, the present invention provides a method for testing a thyristor control unit, comprising:

[0029] The test execution parameters of the debugging instrument are determined based on the acquired parameter information of the thyristor control unit.

[0030] Based on the test execution parameters of the debugger, analog input for the thyristor control unit test is generated by a programmable source.

[0031] Based on the analog input, the thyristor control unit is tested using a debugger and a power load plug-in.

[0032] When testing the thyristor control unit, the test data of the thyristor control unit collected by the debugging instrument is used to generate the test results of the thyristor control unit.

[0033] Optionally, based on the analog input, the thyristor control unit is tested using a debugger and a power load module, including:

[0034] Based on the power supply voltage of the thyristor control unit when the acquired analog input is applied to the thyristor control unit under test, it is determined whether the preset power supply voltage range is met. If it is met, the low sampling voltage characteristic test of the thyristor control unit is performed using a debugging instrument.

[0035] In response to the low sampling voltage characteristic test of the thyristor control unit, a high sampling voltage characteristic test of the thyristor control unit is performed by connecting a parallel equalizing resistor to the power load plug using a high voltage relay.

[0036] Optionally, the low sampling voltage characteristic test includes a forward setup voltage indication pulse width test, a forward setup voltage indication pulse threshold test, a thyristor triggering test, and a reverse recovery period time window test.

[0037] The high sampling voltage characteristic test includes the protective trigger indication pulse width test, the protective trigger indication pulse threshold test, and the reverse recovery period threshold test.

[0038] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0039] This invention simplifies the thyristor control unit (TCU) testing system structure by using a debugger and a power load module in conjunction with a TCU. The debugger automatically collects and interprets TCU test data and generates test results, eliminating the need for manual oscilloscope observation and calculation, thus improving testing efficiency. This invention achieves automated testing of TCUs, offering high efficiency and convenience, and can be applied to batch testing in single-module production within a factory.

[0040] This invention reduces the voltage requirements during thyristor control unit testing by using a high-voltage relay and parallel equalizing resistors, thus improving the safety of thyristor control unit testing. It enhances the stability of the thyristor control unit through an LCD module, enabling manual input of thyristor parameter information even when the barcode scanner is damaged or the thyristor control unit label is broken. Automatic positioning of the thyristor control unit is achieved using pneumatic equipment, improving the automation level and testing efficiency of the thyristor control unit testing system. Information exchange between multiple modules within the debugging instrument is achieved through a backplane module, and the accuracy of the thyristor control unit test results is ensured by a digital signal processing module. This invention improves the testing efficiency of intelligent manufacturing thyristor control units, reduces testing difficulty, provides detailed testing of module performance, records test data, allows for timely troubleshooting of module hardware problems, and can be applied to batch testing of single modules in factory production.

[0041] This invention comprises an industrial controller, a debugger, a programmable source, a barcode scanner, a TCU plug-in, a power load plug-in, a high-voltage relay box, and pneumatic equipment. All components are installed in a test cabinet. The industrial controller controls the start and stop of the test. Through the coordinated operation of the pneumatic equipment, debugger, programmable source, power load plug-in, and high-voltage relay box, the invention completes hardware function tests for the TCU plug-in, including power supply measurement points, forward voltage establishment IP pulse width and forward voltage establishment IP threshold, forward gate trigger, reverse recovery time window, protective trigger IP pulse width and protective trigger threshold, and reverse recovery protection threshold. This improves the testing efficiency and reduces the difficulty of intelligent manufacturing TCU plug-in testing. It provides detailed testing of the plug-in's performance, records test data, allows for timely troubleshooting of plug-in hardware problems, and can be applied to batch testing of single plug-ins within a factory. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the single crystal thyristor control unit test system of the present invention;

[0043] Figure 2 This is a schematic diagram of the dual thyristor control unit test system of the present invention;

[0044] Figure 3 This is a schematic diagram of a typical configuration structure of the debugger of the present invention;

[0045] Figure 4 This is a schematic diagram of the thyristor control unit testing method of the present invention. Detailed Implementation

[0046] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0047] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0048] Example 1

[0049] This embodiment introduces a thyristor control unit testing system, which includes a data acquisition module, a thyristor control unit testing module, and a testing cabinet;

[0050] The test cabinet is used to house the data acquisition module and the thyristor control unit test module; the input terminals of the test cabinet are connected to AC and DC power signals.

[0051] The data acquisition module is used to collect parameter information of the thyristor control unit; the parameter information includes the plug-in serial number, plug-in model, hardware version and production date.

[0052] The thyristor control unit test module includes a power load module, a debugger, and a programmable source.

[0053] The test instrument is used to determine the test execution parameters based on the parameter information of the thyristor control unit;

[0054] The test cabinet is connected to the input terminal of the programmable source to provide AC / DC power signals to the programmable source. The output terminal of the programmable source is connected to the control unit of the thyristor under test through a power load plug-in to provide analog input for the test of the thyristor control unit according to the test execution parameters output by the debugger.

[0055] The debugger uses analog inputs to test the thyristor control unit and collects test data during the test process; the debugger generates test results for the thyristor control unit based on the test data.

[0056] In summary, this embodiment automatically collects and judges the test data of the thyristor control unit and generates the test results of the thyristor control unit by means of a debugging instrument, avoiding the need for manual observation of the oscilloscope to calculate the test results and improving the testing efficiency of the thyristor control unit.

[0057] Example 2

[0058] This invention provides a thyristor control unit testing system, including a data acquisition module, a thyristor control unit testing module, pneumatic equipment, and a testing cabinet;

[0059] The data acquisition module is used to collect parameter information from the thyristor control unit;

[0060] The thyristor control unit test module includes a power load module, a debugger, and a programmable source.

[0061] The power load module includes a high-voltage circuit, and the output of the programmable source is connected to the thyristor control unit through the high-voltage circuit to transmit analog input to the thyristor control unit for testing.

[0062] The power load module is used in conjunction with the TCU module for testing. It is equipped with thyristors, resistors, and capacitors. The resistors and capacitors provide the TCU module with power, voltage equalization, drive, and monitoring electrical circuits, while the thyristors are the triggering, control, and protection components of the TCU module.

[0063] like Figure 1 As shown, the high-voltage circuit includes the thyristor control unit energy extraction branch, the thyristor control unit sampling branch, and the thyristor control unit grounding branch;

[0064] One end of the thyristor control unit's power extraction branch is connected to a programmable source, and the other end is connected to the thyristor control unit's power extraction terminal; one end of the thyristor control unit's sampling branch is connected to the programmable source, and the other end is connected to the thyristor control unit's sampling terminal; one end of the thyristor control unit's grounding branch is connected to the programmable source, and the other end is connected to the thyristor control unit's grounding terminal. Furthermore, in this embodiment, the TCU plug-in can be connected in parallel to achieve simultaneous testing of dual thyristor control units, such as... Figure 2 As shown.

[0065] The power load module also includes a low-voltage equivalent circuit; the low-voltage equivalent circuit is connected to the commissioning instrument via pneumatic equipment for information exchange; the low-voltage equivalent circuit includes a parallel equalizing resistor and a high-voltage relay, and the parallel equalizing resistor is connected in parallel to the sampling branch of the thyristor control unit of the high-voltage circuit via the high-voltage relay.

[0066] The high-voltage relay is used to control the parallel equalizing resistor connected to the high-voltage circuit. This parallel equalizing resistor is used to adjust the equivalent resistance value of the equalizing resistor in the TCU plug-in. It can be programmably controlled, reducing the protective trigger threshold value and thus lowering the test hardware requirements.

[0067] The test cabinet is connected to the input terminal of the programmable source to provide AC / DC power signals. The output terminal of the programmable source is connected to the control unit of the thyristor under test through a power load plug-in, and is used to provide analog input for testing the thyristor control unit according to the test execution parameters output by the debugger. The programmable source is used to provide the required voltage for the thyristor and has a current limiting function. It communicates with the debugger through a serial port and is controlled by it.

[0068] like Figure 3As shown, the debugger is used to determine the test execution parameters based on the parameter information of the thyristor control unit, and to perform thyristor control unit testing using analog input, generating thyristor control unit test results. The debugger controls the specific functional testing process of the TCU plug-in, supports receiving TCU plug-in information transmitted by a barcode scanner, supports manual button selection of the plug-in to be tested, matches the corresponding test script after parsing the plug-in model and hardware version, and automatically tests the TCU plug-in using pneumatic testing fixtures; the testing process is displayed in real time through a human-machine interface, and a test report is generated upon completion; it supports transmitting TCU plug-in information, test content, and test results to the industrial controller via network. The debugger uses a 4U half-layer or full-layer chassis, internally consisting of power supply plug-in, management plug-in, digital signal processing plug-in, communication plug-in, sampling plug-in, optical port plug-in, output plug-in, LCD plug-in, and backplane plug-in. The LCD plug-in is located on the front of the debugger, and the backplane plug-in is located on the back of the LCD, neither occupying chassis slots; other plug-ins are inserted into the backplane plug-in slots, and the communication and output plug-ins support expansion and configuration of multiple units. Its power supply module supports DC220 / 110V and AC220V / 110V inputs to meet the power supply requirements of different usage scenarios; it supports 5V, 60W backplane power output to power other modules of the debugger; it supports one DC24V output for powering other devices as a backup power supply; the module panel has a rocker switch to control the power-on and power-off of the debugger. Its management module has external communication ports supporting CAN, Ethernet, serial, and HTM data transmission methods to adapt to the communication needs of different modules. The management module communicates with the LCD module via the backplane serial port to realize the human-machine interface function; it communicates with the barcode scanner via the panel serial port to receive the barcode information of the module under test; it supports IRIG-B hard B code time synchronization to synchronize the debugger clock. Its digital signal processing module controls and reads / writes backplane I / O signals and acquires backplane analog input signals; it is responsible for the logical calculation functions of the TCU testing process. Its communication module supports 485 and 232 communication methods for programmable source serial communication, controlled by the CAN message of the management module. Its sampling module has a sampling function, which can acquire the 11V and 22V power supply voltages and thyristor operating voltages of the TCU module through the sampling channel; it has an input function, which can acquire the reverse recovery time window measurement points and reverse recovery threshold window measurement points of the TCU module through the input channel; it has an output function, which can control the operation of the high-voltage relay box through the output channel, and connect a parallel voltage equalization resistor to reduce the equivalent voltage equalization resistor value. Its optical port module is used to receive IP optical pulses from the TCU module and to emit ignition pulse (FP) optical pulses; the optical port module realizes optical-to-electrical conversion, connects to the digital signal processing module through the backplane I / O, and is controlled by the digital signal processing module. Its output module provides multiple empty node outputs to control the switching of the test circuit, and is controlled by the CAN message of the management module.Its LCD module is used for human-machine interaction, supports button control, and is used to view debugger information and select test module types. It is controlled by serial port messages from the management module. Its backplane module contains an FPGA chip, which can control the backplane I / O output, provide power supply, I / O bus, CAN bus, HTM bus and other loops, and supports serial communication with the management module.

[0069] The digital signal processing (DSP) module is responsible for the test logic of the TCU module under test. Its working principle is as follows: It determines the TCU module's operating status based on the power supply voltage acquired by the sampling module; it calculates the IP pulse width (positive voltage) and establishes the IP pulse width by converting the IP pulse received from the TCU module into a backplane IO signal, and performs error judgment; it establishes the IP threshold value and performs error judgment by acquiring the thyristor voltage (positive voltage) at the rising edge of the received positive voltage IP pulse; it controls the backplane IO signal, which in turn controls the optical port module to send an FP pulse to the TCU module to trigger the thyristor's positive gate G. After a thyristor turn-on time delay, the thyristor voltage acquired by the sampling module is the thyristor's turn-on voltage; after the thyristor is turned on, when the voltage across the thyristor reverses, it recovers the TCU module's reverse voltage based on the sampling module's data. The pulse width of the input signal at the measurement point within the time window is calculated to determine the reverse recovery time window, and error judgment is performed. The sampling module is turned on via the backplane IO control, which in turn controls the high-voltage relay box to close, connecting the parallel equalizing resistor to the high-voltage circuit, thus satisfying the protective triggering condition. The IP pulse width, i.e., the protective trigger IP pulse width, is calculated based on the backplane IO signal converted from the TCU module IP pulse received by the optical port module, and error judgment is performed. The protective trigger threshold value is calculated based on the thyristor operating voltage collected by the sampling module at the rising edge of the received protective trigger IP pulse, and error judgment is performed. When reverse recovery protection occurs, the reverse recovery protection threshold value is calculated based on the thyristor operating voltage collected by the sampling module at the rising edge of the TCU module's reverse recovery threshold window measurement point input signal received by the sampling module, and error judgment is performed.

[0070] The TCU plug-in under test has external ports, namely 1 IP fiber optic transmit port, 1 FP fiber optic receive port, 1 gate trigger port, 1 thyristor monitoring voltage port Y, 1 self-powered circuit input port T, and 1 ground port N. The IP transmit port is connected to the IP optical port of the debugger's optical port plug-in via fiber optic cable, and the FP receive port is connected to the FP optical port of the debugger's optical port plug-in via fiber optic cable. Ports Y, T, and N are connected to the terminals of the power load plug-in via wires. The gate trigger port is connected to the thyristor gate G on the power load plug-in via coaxial fiber optic cable. It has test probes, namely 22V power supply voltage test point, 11V power supply voltage test point, thyristor voltage test point, reverse recovery period threshold window test point, and reverse recovery period time window test point. The test probes are connected to the terminals of the debugger's sampling plug-in via wires through the probes of the test fixture.

[0071] The barcode scanner is used to acquire the component information of the TCU component under test, i.e., barcode information, including component serial number, component model, hardware version, production date, etc. The scanner communicates with the test instrument via serial port, transmitting the component barcode information so that the test instrument can select the correct test script for testing. Optionally, the scanner can communicate with an industrial controller via serial port, and the industrial controller will then transmit the component barcode information to the test instrument for testing. The movement and control of the scanner are achieved by the industrial controller driving pneumatic equipment.

[0072] The TCU module is the thyristor control unit module of the test system. It is placed on the pneumatic device test fixture and connected to the debugger and power load module via optical fiber or wire. In the dual thyristor anti-parallel method test system, a TCU module of the same model as the TCU module under test is also required as a matching test module. This module is placed in the test cabinet for fixed use and does not need to be replaced when testing the same type of TCU module under test.

[0073] Pneumatic equipment includes test fixtures, electrical circuits, and gas circuits; the gas circuits generate mechanical power, and the electrical circuits connect the various parts of the test system. The pneumatic equipment contains the test fixtures and drives their movement.

[0074] The debugging instrument is connected to the data acquisition module, power load module, programmable source, and thyristor control unit under test via pneumatic equipment for information exchange and to collect test data from the thyristor control unit. The instrument is also connected to a barcode scanner and an industrial controller via electrical circuits. The industrial controller outputs control signals to drive the barcode scanner to collect parameter information from the thyristor control unit, including module serial number, module model, hardware version, and production date. The industrial controller is connected to the pneumatic equipment to control the output of mechanical power from the gas circuit. The gas circuit is connected to the test fixture to drive its movement. An LCD module is used to input the parameter information from the thyristor control unit. A digital signal processing module and a sampling module are located on the other side of the backplane module. The digital signal processing module performs test logic operations on the thyristor control unit based on the test data collected by the sampling module via the pneumatic equipment.

[0075] The data acquisition module includes a barcode scanner and an industrial controller; the debugger is connected to the barcode scanner and the industrial controller respectively through an electrical circuit, and uses the control signal output by the industrial controller to drive the barcode scanner to acquire the parameter information of the thyristor control unit, wherein the parameter information includes the plug-in serial number, plug-in model, hardware version and production date;

[0076] The industrial controller is used to detect the position of pneumatic equipment, control its movements, control the barcode scanner, and interact with the test instrument to display information about the TCU plug-in under test and the test process and results. The industrial controller features a high-resolution color LCD screen with touchscreen operation; it has input and output functions, supporting the connection of input nodes and controlling output nodes for checking the operating status and position of pneumatic equipment and controlling its movements; it has Ethernet and serial communication interfaces for communication and data transfer with the test instrument via Ethernet; and it runs a Windows operating system, supporting the running of developed application software. The industrial controller connects to the pneumatic equipment to control the output of mechanical power from the gas circuit; the gas circuit connects to the test fixture to drive its movements.

[0077] The barcode scanner is used to acquire the component information of the TCU component under test, i.e., barcode information, including component serial number, component model, hardware version, production date, etc. The scanner communicates with the test instrument via serial port, transmitting the component barcode information so that the test instrument can select the correct test script for testing. Optionally, the scanner can communicate with an industrial controller via serial port, and the industrial controller will then transmit the component barcode information to the test instrument for testing. The movement and control of the scanner are achieved by the industrial controller driving pneumatic equipment.

[0078] The test cabinet houses all the equipment, with each component of the testing system installed within it. The cabinet is divided into two parts: the upper part is a fixture cabinet, and the lower part is a trolley platform. The fixture cabinet contains a debugger LCD screen, an industrial controller, and pneumatic equipment, and includes a barcode scanner. Its front panel features power, test pass, and failure indicator lights, as well as start, emergency stop, and reset buttons. The rear panel houses a power conversion module, contactors, and an air switch. The front panel power indicator lights show normal power supply to the industrial controller and pneumatic equipment. The test pass and failure indicator lights, connected to the industrial controller, indicate the TCU plug-in test results. The start button controls the industrial controller to initiate the test, moving the pneumatic equipment to the pre-test position (pre-position), driving the barcode scanner, and initiating the debugger test. The emergency stop button controls the industrial controller to stop the pneumatic equipment immediately. The reset button resets all signals (input / output signals) of the industrial controller, causing the pneumatic equipment to exit the pre-position. The rear panel power conversion module converts 220V AC to 24V DC to power the 24V equipment. The tooling of the pneumatic equipment is equipped with a TCU module for automated testing. The trolley platform is equipped with a power load module, a programmable source, a test instrument body, and a high-voltage relay box.

[0079] The thyristor control unit testing system can test the power supply points of the TCU plug-in assembly, the pulse width of the forward voltage establishment indicator pulse (IP), the IP threshold value of the forward voltage establishment, the forward gate trigger, the reverse recovery time window, the IP pulse width of the protective trigger, the protective trigger threshold value, and the reverse recovery protection threshold value.

[0080] In summary, this embodiment consists of an industrial controller, a debugger, a programmable source, a barcode scanner, a TCU plug-in, a power load plug-in, a high-voltage relay box, and pneumatic equipment. All components are installed in a test cabinet. The industrial controller controls the entire testing process. Through the coordinated operation of the pneumatic equipment, debugger, programmable source, power load plug-in, and high-voltage relay box, the hardware functions of the TCU plug-in, including power supply measurement points, forward voltage establishment IP pulse width and forward voltage establishment IP threshold, forward gate trigger, reverse recovery time window, protective trigger IP pulse width and protective trigger threshold, and reverse recovery protection threshold, are tested. This improves the testing efficiency of intelligent manufacturing TCU plug-ins, reduces testing difficulty, provides detailed testing of the plug-in's performance, records test data, allows for timely troubleshooting of plug-in hardware problems, and can be applied to batch testing of single plug-ins in factory production.

[0081] Example 3

[0082] This embodiment provides a test method for a thyristor control unit, such as Figure 4 As shown, it includes:

[0083] The test execution parameters of the debugging instrument are determined based on the acquired parameter information of the thyristor control unit.

[0084] Based on the test execution parameters of the debugger, analog input for the thyristor control unit test is generated through a programmable source.

[0085] Based on analog input, the thyristor control unit is tested using a debugger and a power load plug-in.

[0086] Among them, based on analog input, the thyristor control unit is tested using a debugger and a power load plug-in, such as... Figure 4 As shown, it includes:

[0087] Based on the power supply voltage of the thyristor control unit when the acquired analog input is applied to the thyristor control unit under test, it is determined whether the preset power supply voltage range is met. If it is met, the low sampling voltage characteristic test of the thyristor control unit is performed using a debugging instrument.

[0088] In response to the low-sampling voltage characteristic test of the thyristor control unit, the debugging instrument controls the high-voltage relay to operate. The high-voltage relay then connects a parallel voltage-equalizing resistor to the power load module to perform a high-sampling voltage characteristic test of the thyristor control unit. During the thyristor control unit test, the test data collected by the debugging instrument is used to generate the test results for the thyristor control unit.

[0089] Low sampling voltage characteristic tests include forward setup voltage indication pulse width test, forward setup voltage indication pulse threshold test, thyristor trigger test, and reverse recovery time window test;

[0090] High sampling voltage characteristic testing includes protective trigger indication pulse width testing, protective trigger indication pulse threshold testing, and reverse recovery period threshold testing. Specific steps include:

[0091] Step S110: Run the TCU plugin test system.

[0092] Step S120: The test cabinet is powered on with AC / DC, and the industrial controller, debugger, programmable source, pneumatic equipment, etc., start up, perform self-test, and run.

[0093] Step S130: The tester selects either button test or barcode scan test according to actual needs; Step S131: In button test mode, the tester manually sets the pneumatic device to the preset position; Step S132: In button test mode, the tester manually selects the TCU plug-in model and version to be tested using buttons in the debugger's LCD menu; Step S133: In barcode scan mode, the industrial controller detects the position of the pneumatic device and drives it to start and reach the preset position; Step S134: In barcode scan mode, the industrial controller drives the barcode scanner to scan the barcode of the TCU plug-in to be tested.

[0094] In step S140, the debugger obtains information about the TCU plug-in under test based on button presses or barcode scanning, extracts and identifies the key information of the plug-in under test, stores it, retrieves and matches the test scripts in the test directory, executes the test instructions within the test scripts, and starts the functional test of the TCU plug-in under test. The TCU plug-in information and real-time test items are sent to the industrial controller via Ethernet for display on the industrial controller's LCD screen.

[0095] In step S150, the debugger sends instructions to the programmable source according to the test script instructions, sets the programmable source control mode and output value, starts the programmable source output, and applies the quantity to the anode and cathode ends of the thyristor on the power load plug-in.

[0096] In step S160, the tester samples the 11V and 22V power supply voltages of the TCU module under test to determine its operating status. If the sampled power supply voltage error meets the requirements, the test continues; otherwise, the test proceeds to step S230 and ends.

[0097] In step S170, the debugger performs forward voltage establishment IP pulse width and threshold tests on the TCU module under test. The debugger's optical port module receives the IP pulse from the TCU module under test and converts it into a backplane IO signal. The DSP module calculates the IP pulse width, i.e., the forward voltage establishment IP pulse width, based on the backplane IO signal and performs error judgment. The debugger's sampling module converts the acquired thyristor voltage into a backplane AI signal. The DSP module acquires and calculates the backplane AI signal when it receives the rising edge of the forward voltage establishment IP pulse, i.e., the backplane IO signal, to obtain the forward voltage establishment IP threshold value and performs error judgment. If the acquired forward voltage establishment IP pulse width and threshold successively meet the requirements, the test continues; otherwise, it jumps to step S230 and ends the test.

[0098] Step S180: The debugger controls the thyristor triggering. The debugger's DSP plug-in outputs a backplane IO signal, which is converted into an FP pulse via an optical port plug-in and sent to the TCU plug-in under test via optical fiber. After receiving the FP pulse, the TCU plug-in under test converts it into a trigger pulse and transmits it to the gate of the thyristor via a coaxial cable; the thyristor is then triggered and turned on.

[0099] In step S190, the debugger performs a reverse recovery time window test on the TCU module under test. After the thyristor is turned on, when the voltage across the thyristor is reversed, the debugger's DSP module calculates the pulse width, which is the reverse recovery time window, based on the input signal at the reverse recovery time window test point of the TCU module under test acquired by the sampling module, and performs error judgment. If the acquired reverse recovery time window meets the requirements, the test continues; otherwise, it jumps to step S230 and ends the test.

[0100] In step S200, the commissioning instrument controls the high-voltage relay box to operate, connecting the parallel equalizing resistor on the power load module. The commissioning instrument's DSP module controls the sampling module to turn on via the backplane I / O, thereby controlling the high-voltage relay box to close, cutting the parallel equalizing resistor into the high-voltage circuit to meet the protective triggering conditions.

[0101] In step S210, the debugger performs protective trigger IP pulse width and threshold tests on the TCU module under test. When the TCU meets the protective trigger conditions, the debugger's DSP module calculates the IP pulse width (i.e., the protective trigger IP pulse width) based on the backplane IO signal converted from the TCU module IP pulse received by the optical port module and performs error judgment. It also calculates the protective trigger threshold value based on the thyristor operating voltage collected by the sampling module at the rising edge of the received protective trigger IP pulse and performs error judgment. If the collected protective trigger IP pulse width and threshold successively meet the requirements, the test continues; otherwise, it jumps to step S230 and ends the test.

[0102] In step S220, the debugger performs a reverse recovery period threshold test on the TCU module under test and resets the high-voltage relay box. When the TCU module under test experiences reverse recovery period protection, the debugger's DSP module calculates the reverse recovery period protection threshold value based on the thyristor operating voltage collected by the sampling module at the rising edge of the input signal at the reverse recovery period threshold window of the TCU module received from the sampling module, and performs error judgment. Then, the debugger controls the high-voltage relay to reset and disconnects the parallel equalizing resistor of the power load module.

[0103] In step S230, the debugger controls the programmable source to stop analog output.

[0104] Step S240: The debugger finishes testing the TCU plug-in under test, generates the test log, and sends the test results to the industrial controller via Ethernet, thus ending the test.

[0105] Step S250: The tester selects to exit the pre-position of the pneumatic equipment based on the previous button or barcode scan test. Step S251: If the manual button mode was selected earlier, the tester needs to manually exit the pre-position of the pneumatic equipment; Step S252: If the barcode scan mode was selected earlier, the industrial controller will automatically exit the pre-position of the pneumatic equipment.

[0106] In step S260, if the tester disconnects the power to the test cabinet, the TCU test system will stop running; otherwise, the test system will wait for the next TCU module to be tested.

[0107] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0108] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0109] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0110] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0111] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A thyristor control unit testing system, characterized in that, Includes a data acquisition module, a thyristor control unit test module, and a test cabinet; The data acquisition module is used to acquire parameter information of the thyristor control unit; The thyristor control unit test module includes a power load plug-in, a debugger, and a programmable source. The test cabinet is connected to the input terminal of the programmable source to provide AC / DC power signals, and the output terminal of the programmable source is connected to the control unit of the thyristor under test through a power load plug-in to provide analog input for testing the thyristor control unit according to the test execution parameters output by the debugger; The debugging instrument is used to determine the test execution parameters based on the parameter information of the thyristor control unit, and to perform thyristor control unit testing using analog inputs, thereby generating thyristor control unit test results.

2. The thyristor control unit testing system according to claim 1, characterized in that, It also includes pneumatic equipment, The debugging instrument is connected to the data acquisition module, power load plug-in, programmable source and thyristor control unit under test via pneumatic equipment for information exchange, and uses pneumatic equipment to collect test data of thyristor control unit.

3. The thyristor control unit testing system according to claim 2, characterized in that, The data acquisition module includes a barcode scanner and an industrial controller; the pneumatic equipment includes a testing fixture, an electrical circuit, and a gas circuit. The debugging device is connected to the barcode scanner and the industrial controller via an electrical circuit. The control signal output by the industrial controller drives the barcode scanner to collect parameter information of the thyristor control unit. The parameter information includes the plug-in serial number, plug-in model, hardware version and production date. The industrial controller is connected to pneumatic equipment and is used to control the output of mechanical power from the gas circuit; The gas circuit is connected to the test fixture and is used to drive the movement of the test fixture.

4. The thyristor control unit testing system according to claim 1, characterized in that, The power load plug-in includes a high-voltage circuit, and the output terminal of the programmable source is connected to the thyristor control unit through the high-voltage circuit to transmit analog input to the thyristor control unit for testing; The high-voltage circuit includes a thyristor control unit energy extraction branch, a thyristor control unit sampling branch, and a thyristor control unit grounding branch; One end of the power extraction branch of the thyristor control unit is connected to the programmable source, and the other end is connected to the power extraction terminal of the thyristor control unit. One end of the sampling branch of the thyristor control unit is connected to the programmable source, and the other end is connected to the sampling terminal of the thyristor control unit. One end of the grounding branch of the thyristor control unit is connected to the programmable source, and the other end is connected to the grounding terminal of the thyristor control unit.

5. The thyristor control unit testing system according to claim 3 or 4, characterized in that, The power load module also includes a low-voltage equivalent circuit; the low-voltage equivalent circuit is connected to the commissioning instrument via pneumatic equipment for information exchange. The low-voltage equivalent circuit includes a parallel voltage equalizing resistor and a high-voltage relay. The parallel voltage equalizing resistor is connected in parallel to the sampling branch of the thyristor control unit in the high-voltage circuit through the high-voltage relay.

6. The thyristor control unit testing system according to claim 1, characterized in that, The debugging instrument includes an LCD module for inputting parameter information of the thyristor control unit.

7. The thyristor control unit testing system according to claim 6, characterized in that, The debugger also includes a digital signal processing module, a backplane module, and a sampling module; The liquid crystal module is disposed on one side of the back panel module, and the digital signal processing module and the sampling module are disposed on the other side of the back panel module; The digital signal processing plugin is used to perform test logic operations on the thyristor control unit based on the test data of the thyristor control unit collected by the sampling plugin through pneumatic equipment.

8. A test method for a thyristor control unit, characterized in that, include: The test execution parameters of the debugging instrument are determined based on the acquired parameter information of the thyristor control unit. Based on the test execution parameters of the debugger, analog input for the thyristor control unit test is generated by a programmable source. Based on the analog input, the thyristor control unit is tested using a debugger and a power load plug-in. When testing the thyristor control unit, the test data of the thyristor control unit collected by the debugging instrument is used to generate the test results of the thyristor control unit.

9. The thyristor control unit testing method according to claim 8, characterized in that, Based on the analog input, the thyristor control unit is tested using a debugger and a power load module, including: Based on the power supply voltage of the thyristor control unit when the acquired analog input is applied to the thyristor control unit under test, it is determined whether the preset power supply voltage range is met. If it is met, the low sampling voltage characteristic test of the thyristor control unit is performed using a debugging instrument. In response to the low sampling voltage characteristic test of the thyristor control unit, a high sampling voltage characteristic test of the thyristor control unit is performed by connecting a parallel equalizing resistor to the power load plug using a high voltage relay.

10. The thyristor control unit testing method according to claim 9, characterized in that, The low-sampling voltage characteristic test includes forward setup voltage indication pulse width test, forward setup voltage indication pulse threshold test, thyristor trigger test, and reverse recovery period time window test; The high sampling voltage characteristic test includes the protective trigger indication pulse width test, the protective trigger indication pulse threshold test, and the reverse recovery period threshold test.

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