An on-line aging monitoring device and method for a thyristor trigger unit

Abstract

The application discloses an online aging monitoring device and method for a thyristor trigger unit, which comprises an interaction module for setting aging test parameters and displaying state data of the thyristor trigger unit; a main control module for outputting a control signal according to the set aging test parameters and receiving state data of the thyristor trigger unit output by a remote control module, and transmitting the state data of the thyristor trigger unit to the interaction module; and the remote control module for triggering the thyristor trigger unit according to the control signal, receiving a trigger pulse generated by the thyristor trigger unit, judging whether the thyristor trigger unit is in an abnormal aging state according to the received trigger pulse, and outputting the state data of the thyristor trigger unit. The TCU aging test parameters are set, the TCU is monitored online, the aging conditions of the TCU and key devices are judged, the existing TCU test process is improved, and the reliability of the TCU is further ensured.

Description

Technical Field

[0001] This invention relates to aging monitoring of power electronic equipment, specifically to an online aging monitoring device and method for thyristor triggering units. Background Technology

[0002] Flexible DC transmission technology boasts advantages such as flexible control, voltage support, passive converter, and good harmonic characteristics, leading to its widespread application in renewable energy grid connection and power transmission and distribution. Static var compensators (SVCs), static frequency converters (SFCs), and thyristor bypass switches (TBSs), as key components of flexible DC transmission, not only improve the reliability of renewable energy grid connection but also enhance the power transmission and distribution performance of the flexible DC system, playing a crucial role in reactive power regulation. Thyristors, as the core high-power driving devices in these power electronic devices, are reliably triggered and fault-predicted through thyristor triggering units (TCUs). The health status of the TCU is fundamental to ensuring the reliable operation of the power electronic equipment.

[0003] To ensure the reliability of the TCU, each batch of TCUs needs to be tested before the valve assembly. Currently, TCU testing mainly includes thyristor triggering tests, forward protection triggering tests, and reverse recovery period protection triggering tests. Chinese patent application CN109358597A proposes a protective triggering low-voltage equivalent test device and control method for a thyristor control unit. During testing, a low-resistance parallel voltage-equalizing resistor is connected across the static voltage-equalizing resistor, allowing the TCU to trigger protectively under low-voltage conditions. Chinese patent application CN215263786U proposes an intelligent test fixture circuit suitable for thyristor control units, capable of efficiently performing routine forward protection triggering tests and reverse recovery period protection triggering tests for TCUs. Chinese patent application CN115826557A proposes a test device for a converter valve thyristor control unit, adding a low-voltage simulated protective triggering test function to the existing routine protection tests.

[0004] TCUs need to withstand high voltage during operation and have functions such as high voltage power extraction, trigger signal reception and amplification, and thyristor abnormality monitoring. Some key components can withstand high power, resulting in heat accumulation. Alternatively, long-term operation in harsh environments with high temperature and humidity can affect the aging of key components and circuit boards, thereby affecting the reliability of the equipment. Therefore, it is necessary to set up a laboratory aging environment to monitor the overall status of the TCU online. However, traditional routine tests are mostly focused on functional tests and lack online monitoring of the TCU aging status. Summary of the Invention

[0005] Purpose of the invention: To address the above-mentioned shortcomings, the present invention provides an online aging monitoring device and method for thyristor triggering units that further ensures the reliability of TCUs.

[0006] Technical solution: To solve the above problems, the present invention employs an online aging monitoring device for a thyristor triggering unit, comprising:

[0007] The interaction module is used to receive the set aging test parameters and display the status data of the thyristor trigger unit;

[0008] The main control module is used to output control signals according to the set aging test parameters and receive the status data of the thyristor trigger unit output by the remote control module, and transmit the status data of the thyristor trigger unit to the interaction module.

[0009] The remote control module is used to trigger the thyristor triggering unit according to the control signal and receive the trigger pulse generated by the thyristor triggering unit. Based on the received trigger pulse, it determines whether the thyristor triggering unit is in an abnormal aging state and outputs the status data of the thyristor triggering unit.

[0010] Furthermore, the device also includes an aging environment module, used to control the aging test environment of the thyristor triggering unit, and to collect current environmental parameters and transmit the environmental parameters to the main control module; the main control module is also used to transmit the environmental parameters to the interaction module; the interaction module displays the environmental parameters.

[0011] Furthermore, the device includes multiple remote control modules that trigger multiple thyristor triggering units and output the status data of the thyristor triggering units respectively. When the status of a thyristor triggering unit is abnormal, the main control module transmits the abnormal status of the thyristor triggering unit to the interaction module, and simultaneously shuts down the trigger pulse of the remote control module corresponding to the thyristor triggering unit, sets the remote control module as an invalid remote control module, regenerates a valid polling sequence for the valid remote control modules, and outputs control signals to the remote control modules in the valid polling sequence.

[0012] This invention also employs an online aging monitoring method for thyristor triggering units, comprising the following steps:

[0013] Step 1: Receive the set aging test parameters;

[0014] Step 2: Output control signals according to the set aging test parameters;

[0015] Step 3: Trigger the thyristor triggering unit according to the control signal and receive the trigger pulse generated by the thyristor triggering unit;

[0016] Step 4: Determine whether the thyristor triggering unit is in an abnormal aging state based on the received trigger pulse, and output the status data of the thyristor triggering unit;

[0017] Step 5: Display the status data of the thyristor trigger unit.

[0018] Furthermore, the aging test parameters set in step 1 include the trigger pulse frequency. The aging test duration, aging environment temperature and humidity, sampling average a, and aging abnormal state judgment threshold include: the positive and negative change values ​​of the trigger pulse interval, and the maximum and minimum values ​​of the trigger pulse amplitude.

[0019] Furthermore, in step 4, the thyristor trigger single-unit aging abnormality state is determined based on the trigger pulse interval and trigger pulse amplitude of the received trigger pulses; the trigger pulse interval The calculation formula is:

[0020]

[0021] in, For the first The trigger time of each pulse For the first The trigger time of each pulse This is the sample average;

[0022] Trigger pulse amplitude The calculation formula is:

[0023]

[0024] in, For the first The first to the second The sum of the amplitudes of the trigger pulses.

[0025] Furthermore, in step 5, the aging test duration is determined. If the aging test duration has not been reached, the process returns to step 2. In step 2, a control signal is output to the thyristor triggering unit in the valid polling sequence. In step 4, a valid polling sequence is regenerated for the thyristor triggering units that are determined to have no aging abnormality.

[0026] Furthermore, after setting the aging test parameters in step 1, test preparation is carried out; test preparation includes aging environment judgment, thyristor trigger unit enable judgment, and thyristor trigger unit status judgment in the valid polling sequence.

[0027] Beneficial effects: Compared with the prior art, the significant advantages of this invention are that by setting TCU aging test parameters and performing online aging monitoring of the TCU, the aging status of the TCU and key components can be judged, improving the existing TCU test process and further ensuring the reliability of the TCU; it can simultaneously realize online monitoring of multiple TCUs, automatically generate valid TCU test sequences, and greatly improve test efficiency; data exchange between modules is carried out through wireless transmission, making the monitoring environment setup convenient and simplifying the wiring process. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the online aging monitoring device of the present invention;

[0029] Figure 2 This is a schematic flowchart of the online aging monitoring method of the present invention;

[0030] Figure 3 This is a flowchart illustrating the communication process between the main control module and other modules in this invention.

[0031] Figure 4 This is a timing diagram of the signals collected when the remote control module triggers the TCU in this invention. Detailed Implementation

[0032] Example 1

[0033] like Figure 1 As shown, this embodiment of an online aging monitoring device for a thyristor triggering unit includes a main control module 1, an interaction module, a power supply module 4, an aging environment module 5, a remote control module 6, a photoelectric conversion module 7, and a thyristor triggering unit (TCU) under test 8; the interaction module includes a background PC 2 and a mobile APP 3 for human-computer interaction.

[0034] The PC2 and mobile APP3 exchange data with the main control module wirelessly. The PC2 and mobile APP3 are used to input the aging test parameters that need to be set, and at the same time, they receive the status of each module returned by the main control module and display feedback, fault alarms, etc.

[0035] Power module 4 is connected to an external power supply. After passing through an isolation transformer and filtering circuit, it outputs a mains frequency voltage, which is connected to the power input terminal of the TCU8 under test to provide test voltage to the TCU. It also provides control power to other modules through an AC / DC circuit. At the same time, it communicates with the main control module wirelessly, receiving commands from the main control module and returning the TCU power supply voltage status to the main control module.

[0036] The aging environment module 5 can monitor and control the aging test environment. It communicates with the main control module wirelessly and receives control signals from the main control module to the external environmental control device. The environmental controller controls the parameters of the TCU test environment, and the aging environment module collects the current environmental parameters and returns them to the main control module.

[0037] Multiple sets of remote control module 6 and photoelectric conversion module 7 are configured. Remote control module 6 is used for status sampling, processing, and feedback of multiple sets of TCU8 under test. Remote control module 6 connects to the TCU's power harvesting RC circuit, coaxial cable, and the electrical port of the photoelectric conversion module. It collects the TCU's power harvesting voltage, thyristor trigger signal, and electrical signal returned by the photoelectric conversion module. It comprehensively judges whether the collected signals are in an abnormal aging state and simultaneously sends trigger signals to the photoelectric conversion module. Remote control module 6 communicates with the main control module wirelessly, receiving test parameter setting commands from the main control module and feeding back the processed TCU status data to the main control module. Photoelectric conversion module 7 is connected to the TCU8 under test via optical fiber. Photoelectric conversion module 7 converts the TCU8's feedback indicator light pulse IP into an electrical signal and transmits it to the remote control module; it also converts the trigger command into an optical pulse FP and transmits it to the TCU under test.

[0038] After confirming the valid polling sequence of the remote control module, the main control module transmits the input parameters and commands from the backend PC and mobile APP to the power module, environmental monitoring module, and the remote control module in the valid polling sequence. At the same time, it feeds back the status of the power module, environmental monitoring module, and the remote control module in the valid polling sequence to the backend PC and mobile APP for display.

[0039] Example 2

[0040] like Figure 2 As shown, this embodiment presents an online aging monitoring method for thyristor triggering units. Taking the simultaneous online aging monitoring of 10 TCUs as an example, a test environment based on Embodiment 1 is built. After the test environment is built, the test process begins. This includes the following steps:

[0041] Step 1: External power supply is activated; the chip power supply passes self-test; the TCU power supply is monitored; the main control module begins communication with other modules, as shown in the communication flowchart. Figure 3 The main control module 1 queries the backend PC 2 and mobile APP 3 for the current input signals; the main control module transmits setting information to the power module 4 and queries its current status; the main control module transmits setting information to the aging environment module 5 and queries its current status; the main control module transmits setting information to the remote control module 6 and queries its current status; the main control module transmits the status of each module to the backend PC 2 and mobile APP 3, completing one cycle. It enters the next cycle after receiving no termination instruction. The main control module records the initial status of each module during the initial cycle.

[0042] Step 2: Set aging test parameters; In this embodiment, the aging test parameters are set via the backend PC2 or mobile APP3: the trigger pulse frequency is... =50Hz, aging test duration 50 hours, aging environment temperature 45℃-55℃, aging environment humidity 50%-60%, sampling average a=3; aging abnormal state judgment threshold: trigger pulse interval positive change value T+=0.2ms, negative change value T-=0.2ms, trigger pulse amplitude maximum value Vmmax=21.0V, minimum value Vmmin =19.8V.

[0043] Step 3: Output control signals according to the set aging test parameters; specifically:

[0044] In non-initial loops, the main control module compares the background settings with the initial values. If the background settings change, the device enters the test preparation phase, and the background displays that it has entered the test preparation phase.

[0045] After entering the test preparation phase, the main control module compares the status of the aging environment module with the set values. When the ambient temperature reaches 45℃ and the ambient humidity reaches 50%, the device enters the test preparation ready phase, and the background system displays that it has entered the test preparation ready phase. After entering the test preparation ready phase, the system compares the power module status with the set values ​​to determine whether the TCU is enabled. The background system inputs "test start," and the TCU power supply starts supplying power, entering the test start phase.

[0046] The main control module automatically generates a valid polling sequence, specifically:

[0047] Upon entering the test start phase, the main control module records the current state of each remote control module as the first state in the first loop. Based on the comparison between the first state and the initial state, it determines whether the remote control module is a valid module. For valid modules, a remote valid polling sequence is generated. In this embodiment, the 10 remote modules connected to the TCU under test are valid modules when their first state and initial state change after the test starts. Other remote modules are invalid modules. Control signals are output to the remote control modules in the valid polling sequence.

[0048] Step 4: Trigger the thyristor triggering unit according to the control signal and receive the trigger pulse generated by the thyristor triggering unit; the remote control module processes the received signal to determine whether the TCU is in an abnormal aging state, specifically:

[0049] like Figure 4The diagram shows the signal timing received by the remote control module when triggering the TCU: After the TCU is powered on, the power extraction circuit operates to extract power within half a power frequency cycle of the rising sine wave. Simultaneously, the indicator signal IP is returned to the remote control module, allowing the TCU to perform pulse triggering. The remote control module sends the IP signal, and the TCU generates a fixed-width thyristor trigger pulse.

[0050] Step 5: Determine whether the thyristor triggering unit is in an abnormal aging state based on the received trigger pulse, and output the status data of the thyristor triggering unit;

[0051] Based on the above example, to determine whether the TCU is in an abnormal aging state, let's assume we calculate the 10th to 12th pulses:

[0052] Trigger pulse interval:

[0053]

[0054] Trigger pulse amplitude:

[0055]

[0056] Compare T with the maximum and minimum values ​​of the input trigger pulse interval. If T is not in […] , If the value is within the specified range, the TCU is determined to be aging abnormally. Compare with the maximum and minimum values ​​of the input trigger pulse amplitude. If If the voltage is within the range of [19.8V, 21.0V], the TCU power regulator is considered to be aging.

[0057] Step 6: The main control module determines whether any abnormal signals have appeared in each remote control module. If an abnormal signal is received, the trigger pulse of the remote control module is turned off and the remote control module is set as an invalid remote module. A valid polling sequence is regenerated and the background prompts an abnormal status.

[0058] Step 7: Once the set aging test duration of 50 hours is reached, the test is complete.

[0059] This method can collect TCU operating parameters online and determine whether the TCU and key components are in an aging state. This method can monitor the status of multiple TCUs simultaneously through wireless communication, simplifying the experimental platform setup process and improving testing efficiency.

[0060] Based on the same inventive concept, in one embodiment of the present invention, a storage medium is also provided, specifically a computer-readable storage medium, which is a memory device in a computer device used to store programs and data. It is understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and extended storage media supported by the computer device. The computer-readable storage medium provides storage space that stores the terminal's operating system. Furthermore, the storage space also stores one or more instructions suitable for loading and execution by a processor, which can be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk storage device. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the power distribution system reliability assessment method and system considering instantaneous power outage events in the above embodiment.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 functions specified in one or more boxes. The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. An online aging monitoring device for a thyristor triggering unit, characterized in that, include: The interactive module is used to input the set aging test parameters and display the status data of the thyristor trigger unit; The main control module is used to output control signals according to the set aging test parameters and receive the status data of the thyristor trigger unit output by the remote control module, and transmit the status data of the thyristor trigger unit to the interaction module. The remote control module is connected to the TCU's power harvesting RC circuit, coaxial cable, and the electrical port of the photoelectric conversion module. It is used to collect the TCU's power harvesting voltage, thyristor trigger signal, and electrical signal returned by the photoelectric conversion module. Based on the received signals, it determines whether the thyristor trigger unit is in an aging abnormal state and outputs the status data of the thyristor trigger unit. The system includes multiple remote control modules that trigger multiple thyristor triggering units and output the status data of the thyristor triggering units. When the status of a thyristor triggering unit is abnormal, the main control module transmits the abnormal status of the thyristor triggering unit to the interaction module, and simultaneously shuts down the trigger pulse of the remote control module corresponding to the thyristor triggering unit, sets the remote control module as an invalid remote control module, regenerates a valid polling sequence for the valid remote control modules, and outputs control signals to the remote control modules in the valid polling sequence.

2. The online aging monitoring device for a thyristor triggering unit according to claim 1, characterized in that, It also includes an aging environment module, which controls the aging test environment of the thyristor trigger unit, collects current environmental parameters, and transmits the environmental parameters to the main control module; the main control module is also used to transmit the environmental parameters to the interaction module; the interaction module displays the environmental parameters.

3. A method for online aging monitoring of a thyristor triggering unit using the online aging monitoring device of claim 1, characterized in that, Includes the following steps: Step 1: Receive the set aging test parameters; Step 2: Output control signals according to the set aging test parameters; Step 3: Trigger the thyristor triggering unit according to the control signal and receive the trigger pulse generated by the thyristor triggering unit; Step 4: Determine whether the thyristor triggering unit is in an abnormal aging state based on the received trigger pulse, and output the status data of the thyristor triggering unit; Step 5: Display the status data of the thyristor trigger unit.

4. The online aging monitoring method for a thyristor triggering unit according to claim 3, characterized in that, The aging test parameters set in step 1 include the trigger pulse frequency. The aging test duration, aging environment temperature and humidity, sampling average a, and aging abnormal state judgment threshold include: the positive and negative change values ​​of the trigger pulse interval, and the maximum and minimum values ​​of the trigger pulse amplitude.

5. The online aging monitoring method for a thyristor triggering unit according to claim 4, wherein step 2 further comprises controlling the aging test environment of the thyristor triggering unit according to the set aging test parameters, and collecting and displaying the current environmental parameters.

6. The online aging monitoring method for a thyristor triggering unit according to claim 4, characterized in that, In step 4, the aging abnormality state of the thyristor trigger unit is determined based on the trigger pulse interval and trigger pulse amplitude of the received trigger pulses; the trigger pulse interval... The calculation formula is: in, For the first The trigger time of each pulse For the first The trigger time of each pulse This is the sample average; Trigger pulse amplitude The calculation formula is: in, For the first The first to the second The sum of the amplitudes of the trigger pulses.

7. The online aging monitoring method for a thyristor triggering unit according to claim 4, characterized in that, In step 5, the aging test duration is determined. If the aging test duration is not reached, the process returns to step 2. In step 2, a control signal is output to the thyristor triggering unit in the valid polling sequence. In step 4, a valid polling sequence is regenerated for the thyristor triggering unit that is determined to have no aging abnormality.

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 3 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 3 to 7.

Images