An intelligent interface matrix for power transformer integration test

Abstract

The application provides an intelligent interface matrix for power transformer integrated test, aiming at simplifying the complicated wiring operation in the traditional test and improving the automation level and work efficiency of the power transformer test wiring. The intelligent interface matrix is composed of an intelligent control module, a test interface unit and a sensing and monitoring module, supports the wiring task of completing the conventional test of the current transformer dielectric loss, excitation characteristic, loop resistance, primary and secondary direct resistance and the voltage transformer ratio, dielectric loss, insulation resistance and the like, after being connected with the power transformer, the intelligent interface matrix automatically identifies the power transformer type by monitoring the voltage, current and other signals in the test in real time, switches the multiple adjustable test interface units stably and safely according to the predetermined test sequence of different types of transformers in the high-voltage and large-current environment, efficiently and quickly completes all test wiring work, significantly reduces the manual intervention, and effectively improves the test safety, reliability and overall work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power equipment testing, and more particularly, to an intelligent interface matrix for integrated testing of power transformers. BACKGROUND

[0002] In power systems, current transformers (CTs) and voltage transformers (PTs) are critical measurement and protection devices whose accuracy, stability, and reliability directly affect the safe operation of power systems and the accuracy of electric energy metering. To ensure that the performance of transformers meets the standards, a series of routine tests such as dielectric loss test, excitation characteristic test, loop resistance test, ratio test, and insulation resistance test need to be conducted regularly. However, the traditional transformer testing method has the following problems:

[0003] (1) The testing process is tedious and inefficient: Currently, power transformer testing usually relies on multiple special test instruments, and each test project requires separate wiring. The operator needs to manually change the test equipment and adjust the wiring method according to different test requirements. This process not only consumes time but also increases the complexity of the test, resulting in low overall efficiency.

[0004] (2) Manual wiring is prone to errors, affecting test accuracy: Since the test wiring involves multiple sets of test cables, the operator needs to frequently plug and adjust the wiring, which is prone to wiring errors due to human negligence, thereby affecting the accuracy of test data, and even may damage equipment or endanger personal safety due to misoperation.

[0005] (3) Multiple devices, inconvenient for on-site operation: Different test projects require different test instruments, and multiple devices need to be carried on-site and repeatedly replaced with wiring methods, increasing the complexity of the test and the probability of errors caused by human intervention. In addition, manual wiring is more difficult in harsh on-site environments (such as high voltage, high humidity, or narrow space), further reducing the reliability and safety of the test. SUMMARY

[0006] The present application provides an intelligent interface matrix for integrated testing of power transformers, which can automatically adapt to the wiring needs of different test projects, reduce human intervention, improve test efficiency and accuracy, and ensure the safety and reliability of the test process.

[0007] The application provides an intelligent interface matrix for integrated test of a power transformer, which comprises an intelligent control module, a test interface unit and a sensing and monitoring module, the intelligent control module comprises a power module and a micro edge computer, the power module supplies power to the micro edge computer, the test interface unit comprises a plurality of test interfaces, the micro edge computer is connected with each test interface through an electrical connection line, the micro edge computer is connected with the sensing and monitoring module through a signal transmission line, each test interface is connected with the power transformer through an electrical connection line, and the sensing and monitoring module is connected with each test interface through an electrical connection line.

[0008] The sensing and monitoring module is used for collecting voltage signals and current signals of primary and secondary sides of the power transformer and transmitting the voltage signals and the current signals to the intelligent control module when wiring of the intelligent interface matrix and the power transformer is completed.

[0009] The intelligent control module is used for identifying the type of the power transformer according to the voltage signals and the current signals of the primary and secondary sides of the power transformer, acquiring a pre-set test sequence and test time of the power transformer according to the identified type of the power transformer, and controlling the on-off sequence and on-off time of each test interface in the test interface unit according to the pre-set test sequence and test time of the power transformer, so as to perform corresponding test on the power transformer.

[0010] On the basis of the above technical scheme, the application can be further improved as follows.

[0011] Optionally, the sensing and monitoring module comprises a current sensor and a voltage sensor.

[0012] The alternating current sensor is used for collecting current data of the primary and secondary sides of the power transformer and transmitting the current data of the primary and secondary sides of the power transformer to the intelligent control module through a signal transmission line.

[0013] The alternating voltage sensor is used for collecting voltage data of the primary and secondary sides of the power transformer and transmitting the voltage data of the primary and secondary sides of the power transformer to the intelligent control module through a signal transmission line.

[0014] Optionally, the sensing and monitoring module comprises a plurality of current sensors and a plurality of voltage sensors, and the micro edge computer comprises a plurality of I / O interfaces, each current sensor and each voltage sensor is connected with the micro edge computer through an I / O interface.

[0015] A plurality of the current sensors and a plurality of the alternating voltage sensors are used to collect different levels of current data and voltage data output by the power transformer primary side and secondary side during the test, and the collected current data and voltage data of the power transformer primary side and secondary side are transmitted to the intelligent control module through the corresponding I / O interface.

[0016] Optionally, the voltage sensor measurement range is 100-400V, and the accuracy is ±0.5%; the current sensor measurement range is 1-50A, and the accuracy is ±0.5%; the voltage sensor and the current sensor both support 50HZ or 60HZ alternating current frequency.

[0017] Optionally, the intelligent control module is used to identify the type of the power transformer according to the voltage signal and the current signal of the power transformer primary side and secondary side, including:

[0018] The intelligent control module calculates the power transformer primary side impedance value and the secondary side impedance value according to the voltage signal and the current signal of the power transformer primary side and secondary side, and identifies the type of the power transformer according to the power transformer primary side impedance value and the secondary side impedance value.

[0019] Optionally, the identification of the type of the power transformer according to the power transformer primary side impedance value and the secondary side impedance value includes:

[0020] When the primary side impedance value of the power transformer is less than a first preset threshold value and the secondary side impedance value is less than a second preset threshold value, it is determined that the power transformer is a current transformer;

[0021] When the primary side impedance value of the power transformer is greater than the first preset threshold value and the secondary side impedance value is less than the second preset threshold value, it is determined that the power transformer is a voltage transformer.

[0022] Optionally, the test sequence and the test time of the power transformer are obtained according to the identified type of the power transformer, including:

[0023] If the power transformer is a current transformer, the test sequence of the current transformer is loop resistance test, primary-secondary direct resistance test, excitation characteristic test and dielectric loss test, and the duration of each test is set;

[0024] If the power transformer is a voltage transformer, the test sequence of the voltage transformer is insulation resistance test, transformation ratio test and dielectric loss test, and the duration of each test is set.

[0025] Optionally, the test interface unit comprises a current transformer dielectric loss test interface, a current transformer excitation characteristic test interface, a current transformer loop resistance test interface, a current transformer primary and secondary direct resistance test interface, a voltage transformer dielectric loss test interface, a voltage transformer ratio test interface, and a voltage transformer insulation resistance test interface, and each test interface is electrically isolated;

[0026] The current transformer dielectric loss test interface, the current transformer excitation characteristic test interface, the current transformer loop resistance test interface, and the current transformer primary and secondary direct resistance test interface are connected with the current transformer through electrical connection lines, and the voltage transformer dielectric loss test interface, the voltage transformer ratio test interface, and the voltage transformer insulation resistance test interface are connected with the voltage transformer through electrical connection lines.

[0027] Optionally, each test interface is equipped with a controllable switch meeting the corresponding voltage level, which is used to control the on-off of the electrical connection line between the test interface and the power transformer, and the on-off sequence and time of each test interface in the test interface unit are controlled according to the pre-set test sequence and test time of the power transformer, so as to perform the corresponding test on the power transformer, including:

[0028] The intelligent control module is used to send on-off instructions to the corresponding controllable switch according to the pre-set test sequence and test time of the power transformer, so that the controllable switch controls the on-off of the electrical connection line between the corresponding test interface and the power transformer according to the on-off instructions.

[0029] Optionally, the intelligent control module, the test interface unit, and the sensing and monitoring module are detachable.

[0030] The application provides an intelligent interface matrix for integrated testing of a power transformer, which is composed of an intelligent control module, a test interface unit, and a sensing and monitoring module, supports wiring tasks of conventional tests such as dielectric loss, excitation characteristic, loop resistance, primary and secondary direct resistance of a current transformer, and ratio, dielectric loss, and insulation resistance of a voltage transformer, and automatically identifies the type of the power transformer by monitoring voltage and current signals in real time after being connected with the power transformer, and switches the multiple adjustable test interface units stably and safely according to the pre-set test sequence of different types of transformers in a high-voltage and high-current environment, so as to efficiently and quickly complete the wiring work of each test. The application integrates real-time monitoring of voltage and current signals, identification of the type of the transformer, and automatic switching of the test interface in the same interface module, significantly improves the intelligent and automatic level of the wiring of the power transformer, and ensures efficient, stable, and safe operation of the test process. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A structural block diagram of an intelligent interface matrix for integrated testing of power transformers provided in an embodiment of the present invention;

[0032] Figure 2 A flowchart for identifying the type of power transformer;

[0033] Figure 3 A schematic diagram showing the connection between each test interface and the current transformer and voltage transformer;

[0034] Figure 4 This is a schematic diagram of the modular structure of the intelligent interface matrix according to an embodiment of the present invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In addition, the technical features of the various embodiments or individual embodiments provided by the present invention can be arbitrarily combined with each other to form feasible technical solutions. Such combinations are not constrained by the order of steps and / or structural composition patterns, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0036] Traditional instrument transformer testing methods are characterized by complex wiring, frequent manual intervention, low testing efficiency, high error rate, and certain safety risks. In particular, when multiple tests are conducted continuously, manual wiring replacement is not only time-consuming but also prone to wiring errors, which seriously affects the accuracy of testing and the safety of the system.

[0037] To address the aforementioned problems, embodiments of the present invention provide an intelligent interface matrix for integrated testing of power transformers, such as... Figure 1 As shown, the intelligent interface matrix includes an intelligent control module, a test interface unit, and a sensing and monitoring module. The intelligent control module includes a power supply module and a micro edge computer. The power supply module supplies power to the micro edge computer. The test interface unit includes multiple test interfaces. The micro edge computer is connected to each test interface via electrical connection lines. The micro edge computer is connected to the sensing and monitoring module via signal transmission lines. Each test interface is connected to a power transformer via electrical connection lines. The sensing and monitoring module is connected to each test interface via electrical connection lines.

[0038] It can be understood that the three core modules of the intelligent control module of the intelligent interface matrix, the test interface unit and the sensing monitoring module are connected with each other through electrical connection lines and signal transmission lines to form a complete signal acquisition, control identification and interface switching closed loop system, realize the automatic test connection process and realize the automatic operation and logic closed loop of the whole test connection process.

[0039] The sensing monitoring module is configured to collect the voltage signals and current signals of the primary side and the secondary side of the power transformer after the intelligent interface matrix is connected with the power transformer, and transmit the voltage signals and current signals to the intelligent control module.

[0040] The intelligent control module is configured to identify the type of the power transformer according to the voltage signals and current signals of the primary side and the secondary side of the power transformer, and obtain the pre-set test sequence and test time of the power transformer according to the identified type of the power transformer, and further configured to control the on-off sequence and on-off time of each test interface in the test interface unit according to the pre-set test sequence and test time of the power transformer, so as to perform the corresponding test on the power transformer.

[0041] In an embodiment of the present application, the sensing monitoring module includes a current sensor and a voltage sensor; the alternating current sensor is configured to collect the current data of the primary side and the secondary side of the power transformer, and transmit the current data of the primary side and the secondary side of the power transformer to the intelligent control module through the signal transmission line; and the alternating voltage sensor is configured to collect the voltage data of the primary side and the secondary side of the power transformer, and transmit the voltage data of the primary side and the secondary side of the power transformer to the intelligent control module through the signal transmission line.

[0042] In the sensing monitoring module, a plurality of current sensors and a plurality of voltage sensors can be included; the micro edge computer includes a plurality of I / O interfaces, and the micro edge computer is connected with each current sensor and each voltage sensor through the I / O interfaces. In the process of testing the power transformer, since the excitation power supply of the power transformer has different voltage levels, the voltage level output by the power transformer after the test of the power transformer will also be different. Therefore, a plurality of current sensors and voltage sensors of different levels are arranged in the sensing monitoring module in the embodiment of the present application, the current data and voltage data of different levels output by the primary side and the secondary side of the power transformer are collected, and the collected current data and voltage data of the primary side and the secondary side of the power transformer are transmitted to the intelligent control module through the corresponding I / O interfaces.

[0043] For example, in an embodiment of the present application, the sensing and monitoring module can integrate two current sensors and two voltage sensors. The voltage sensor has high input impedance, a measurement range of 100-400V, and an accuracy of ±0.5%. The current sensor has a measurement range of 1-50A and an accuracy of ±0.5%. Both the voltage sensor and the current sensor support 50Hz / 60Hz power grid frequency, have overload protection and electromagnetic and radio frequency interference suppression capabilities, and output digital signals for analysis and calculation by the intelligent control module.

[0044] In an embodiment of the present application, the intelligent control module is configured to identify the type of the power transformer based on the voltage and current signals of the primary side and the secondary side of the power transformer, and includes the following steps:

[0045] The intelligent control module calculates the impedance values of the primary side and the secondary side of the power transformer based on the voltage and current signals of the primary side and the secondary side of the power transformer, and identifies the type of the power transformer based on the impedance values of the primary side and the secondary side of the power transformer.

[0046] In the above process, when the impedance value of the primary side of the power transformer is less than a first preset threshold value and the impedance value of the secondary side is less than a second preset threshold value, the power transformer is determined to be a current transformer; when the impedance value of the primary side of the power transformer is greater than the first preset threshold value and the impedance value of the secondary side is less than the second preset threshold value, the power transformer is determined to be a voltage transformer.

[0047] It can be understood that the intelligent control module is embedded with a micro edge computer, which is powered by a stable power supply module. The micro edge computer has multiple channel I / O interfaces for collecting data from the sensing and monitoring module, and a high-speed processing chip built-in for real-time analysis of voltage and current. By writing programs, the micro edge computer can realize functions such as test process logic control, automatic identification of power transformer type, test time management, and control signal output. The micro edge computer is connected to the sensing and monitoring module to receive voltage and current data from the voltage sensor and the current sensor in real time, further analyze the voltage and current signals of the primary side and the secondary side of the power transformer, calculate the impedance values of the primary side and the secondary side of the power transformer, and identify the type of the transformer. The specific identification logic flowchart is shown in FIG. Figure 2

[0048] Specifically, the micro edge computer calculates the impedance values of the primary side and the secondary side of the power transformer by analyzing the voltage and current characteristic parameters of the power transformer, automatically judges the type of the connected power transformer: if both the impedance value of the primary side and the impedance value of the secondary side are very small, it is identified as a current transformer (CT); if the impedance value of the primary side is very large and the impedance value of the secondary side is very small, it is identified as a voltage transformer (PT), realizing automatic identification and configuration of plug-and-play without human intervention.

[0049] ​The micro edge computer is preconfigured with test sequences and time settings for different types of mutual inductors, and the intelligent control module automatically outputs control signals to drive the controllable switch array in the test interface unit, so that the current power mutual inductor is connected to the corresponding test interface unit, and the automatic configuration and switching of the test wiring are realized.

[0050] The current mutual inductor test sequence and test time are: loop resistance test (1 second) → primary and secondary direct resistance test (1 second) → excitation characteristic test (1 minute) → dielectric loss test (30 seconds); and the voltage mutual inductor test sequence and time are: insulation resistance test (1 minute) → ratio test (30 seconds) → dielectric loss test (30 seconds).

[0051] The test interface unit includes a plurality of independent test channels corresponding to the test requirements of different types of mutual inductors, and includes a current mutual inductor dielectric loss test interface unit, an excitation characteristic test interface unit, a loop resistance test interface unit, and a primary and secondary direct resistance test interface unit, all of which are connected to the current mutual inductor through electrical connection lines to realize various tests on the current mutual inductor. The test interface unit also includes a voltage mutual inductor dielectric loss test interface unit, a ratio test interface unit, and an insulation resistance test interface unit, all of which are connected to the voltage mutual inductor through electrical connection lines to realize various tests on the voltage mutual inductor. These test interface units are electrically isolated to ensure safe operation in a high-voltage and high-current environment. Each interface unit is internally integrated with a controllable switch and an overcurrent protection circuit matched with its voltage / current level, and is switched to the corresponding test circuit according to the instructions of the micro edge computer, as shown in Figure 3 , to realize automatic configuration of test wiring.

[0052] During the test of the power mutual inductor, a controllable switch that meets the corresponding voltage level is provided in each test interface to control the on-off of the electrical connection line between the power mutual inductor. The intelligent control module sends on-off instructions to the corresponding controllable switch according to the pre-set test sequence and test time of the power mutual inductor, so that the controllable switch controls the on-off of the electrical connection line between the corresponding test interface and the power mutual inductor according to the on-off instructions, to realize various tests on the current mutual inductor and the voltage mutual inductor according to the test sequence of the current mutual inductor and the test sequence of the voltage mutual inductor.

[0053] The workflow of the embodiment of the application is as follows:

[0054] (1) The operator connects the power mutual inductor to the corresponding input end of the intelligent interface module;

[0055] (2) After the system is powered on, the sensing and monitoring module collects the voltage and current signals of the primary side and the secondary side of the power transformer in real time and sends them to the intelligent control module;

[0056] (3) The intelligent control module identifies the current power transformer as a current transformer CT or a voltage transformer PT by calculating the impedance values of the primary side and the secondary side of the power transformer.

[0057] (4) The micro edge computer calls the preset test sequence: if it is a current transformer CT, it tests the current transformer in the order of loop resistance test → primary-secondary direct resistance test → excitation characteristic test → dielectric loss test; if it is a voltage transformer PT, it tests the voltage transformer in the order of insulation resistance test → ratio test → dielectric loss test.

[0058] (5) The micro edge computer sends control signals to drive the controllable switches of the test interface unit in turn, switches to the corresponding test interface unit connected with the power transformer, and realizes the test of the power transformer in turn.

[0059] As shown in Figure 4 The embodiment of the present application adopts a highly modular design, all modules (intelligent control module, sensing and monitoring module, test interface unit) are relatively independent small modules, and have good compatibility and maintainability. Each module can be individually disassembled, replaced or upgraded, ensuring that only the faulty module needs to be replaced during on-site maintenance or system upgrade, without the need to replace the entire device, thereby significantly reducing operation and maintenance costs. To ensure the safety of the device, electrical isolation technology is used between the test interface units, and high-voltage and high-current insulation materials are used for packaging, ensuring the stability and reliability of the system in harsh test environments.

[0060] The application range of the intelligent interface matrix provided by the embodiment of the present application includes but is not limited to substation, power equipment manufacturing plant, detection agency, power company and the like, and it is particularly suitable for periodic testing and batch production testing of power transformers. Through intelligent and automated wiring mode, it significantly improves the test efficiency, reduces human operation errors and safety hazards, and ensures the accuracy of test data and the long-term stable operation of the device.

[0061] The intelligent interface matrix for integrated testing of power transformers provided by the present application has the following beneficial effects:

[0062] 1. The automation and intelligent control of the power transformer test wiring process are realized, the manual operation intensity is significantly reduced, the wiring error rate is reduced, and the test efficiency and operation safety are improved.

[0063] 2. Based on the automatic identification of the transformer type according to the impedance values of the primary side and the secondary side of the power transformer, the plug-and-play transformer is connected, without manual configuration, and is suitable for the rapid identification and switching of various types of transformers.

[0064] 3. The system adopts a highly modular design, supports the disassembly and replacement of independent units, is convenient for later maintenance and function expansion, and enhances the sustainable operation ability and adaptability of the equipment.

[0065] 4. The key components adopt high-voltage and high-current bearing capacity insulation materials, and are supplemented by electrical isolation protection design, to ensure the safety of the equipment and personnel in the high-voltage and high-current working conditions.

[0066] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0067] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented 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.

[0068] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The function specified in one flow or multiple flows and / or blocks Figure 1 The function specified in one block or multiple blocks.

[0069] These computer program instructions can also be stored in a computer readable storage medium that can guide the computer or other programmable data processing devices to work in a specific way, so that the instructions stored in the computer readable storage medium produce a product including instruction devices, which implement the functions specified in the flowcharts and / or block diagrams. Figure 1 The function specified in one flow or multiple flows and / or blocks Figure 1 The function specified in one block or multiple blocks.

[0070] These computer program instructions can also be loaded into a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The flowchart blocks Figure 1 The flowchart blocks

[0071] Although preferred embodiments of the application have been described herein, it will be apparent to those skilled in the art that various modifications can be made within the scope of the application without departing from the spirit of the application. Accordingly, it is intended that all such possible modifications be included within the scope of the application as described in the following claims. In the claims, means-plus-function clauses are used where functionally equivalent blocks can accomplish the same operation and that enables devices constructed in

[0072] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. An intelligent interface matrix for power transformer integration testing, characterized by, The intelligent control module includes a power module and a micro edge computer, the power module supplies power for the micro edge computer, the test interface unit includes a plurality of test interfaces, the micro edge computer is connected with each test interface through an electrical connection line, the micro edge computer is connected with the sensing monitoring module through a signal transmission line, each test interface is connected with a power transformer through an electrical connection line, and the sensing monitoring module is connected with each test interface through an electrical connection line. The sensing monitoring module is used for collecting voltage signals and current signals of the primary side and the secondary side of the power transformer after the intelligent interface matrix is connected with the power transformer, and transmitting the voltage signals and the current signals to the intelligent control module. The intelligent control module is used for identifying the type of the power transformer according to the voltage signals and the current signals of the primary side and the secondary side of the power transformer, and specifically includes that the intelligent control module calculates impedance values of the primary side and the secondary side of the power transformer according to the voltage signals and the current signals of the primary side and the secondary side of the power transformer, identifies the type of the power transformer according to the impedance values of the primary side and the secondary side of the power transformer, and specifically includes that when the impedance value of the primary side of the power transformer is less than a first preset threshold value and the impedance value of the secondary side is less than a second preset threshold value, it is determined that the power transformer is a current transformer; when the impedance value of the primary side of the power transformer is greater than the first preset threshold value and the impedance value of the secondary side is less than the second preset threshold value, it is determined that the power transformer is a voltage transformer; and according to the type of the power transformer identified, the test sequence and the test time of the power transformer are obtained in advance; and the intelligent control module is also used for controlling the on-off sequence and the on-off time of each test interface in the test interface unit according to the test sequence and the test time of the power transformer obtained in advance, so as to perform corresponding tests on the power transformer.

2. The intelligent interface matrix of claim 1, wherein, The sensing monitoring module includes a current sensor and a voltage sensor; The current sensor is used for collecting current data of the primary side and the secondary side of the power transformer, and transmitting the current data of the primary side and the secondary side of the power transformer to the intelligent control module through a signal transmission line; The voltage sensor is used for collecting voltage data of the primary side and the secondary side of the power transformer, and transmitting the voltage data of the primary side and the secondary side of the power transformer to the intelligent control module through a signal transmission line.

3. The intelligent interface matrix of claim 1, wherein, The sensing monitoring module includes a plurality of current sensors and a plurality of voltage sensors, and the micro edge computer includes a plurality of I / O interfaces, the micro edge computer is connected with each current sensor and each voltage sensor through an I / O interface; A plurality of current sensors and a plurality of voltage sensors are used for collecting different levels of current data and voltage data output by the primary side and the secondary side of the power transformer during the test, and transmitting the collected current data and voltage data of the primary side and the secondary side of the power transformer to the intelligent control module through corresponding I / O interfaces.

4. The intelligent interface matrix of claim 2 or 3, wherein, The voltage sensor has a measurement range of 100-400V and an accuracy of ±0.5%; the current sensor has a measurement range of 1-50A and an accuracy of ±0.5%; and the voltage sensor and the current sensor both support an AC frequency of 50Hz or 60Hz.

5. The intelligent interface matrix of claim 4, wherein, The test sequence and test time of the power transformer are obtained according to the identified type of the power transformer, and the test sequence and test time of the power transformer are pre-set, including: If the power transformer is a current transformer, the test sequence of the current transformer is loop resistance test, primary-secondary direct resistance test, excitation characteristic test and dielectric loss test, and the duration of each test is set; If the power transformer is a voltage transformer, the test sequence of the voltage transformer is insulation resistance test, ratio test and dielectric loss test, and the duration of each test is set.

6. The intelligent interface matrix of claim 5, wherein, The test interface unit includes a current transformer dielectric loss test interface, a current transformer excitation characteristic test interface, a current transformer loop resistance test interface, a current transformer primary-secondary direct resistance test interface, a voltage transformer dielectric loss test interface, a voltage transformer ratio test interface and a voltage transformer insulation resistance test interface, and each test interface is electrically isolated; The current transformer dielectric loss test interface, the current transformer excitation characteristic test interface, the current transformer loop resistance test interface and the current transformer primary-secondary direct resistance test interface are connected to the current transformer through electrical connection lines, and the voltage transformer dielectric loss test interface, the voltage transformer ratio test interface and the voltage transformer insulation resistance test interface are connected to the voltage transformer through electrical connection lines.

7. The intelligent interface matrix of claim 1, wherein, Each test interface is equipped with a controllable switch that meets the corresponding voltage level, which is used to control the on-off of the electrical connection line between the test interface and the power transformer, and the on-off sequence and on-off time of each test interface in the test interface unit are controlled according to the pre-set test sequence and test time of the power transformer, so as to perform corresponding tests on the power transformer, including: The intelligent control module is configured to send on-off instructions to the corresponding controllable switch according to the pre-set test sequence and test time of the power transformer, so that the controllable switch controls the on-off of the electrical connection line between the corresponding test interface and the power transformer according to the on-off instructions.

8. The intelligent interface matrix of claim 1, wherein, The intelligent control module, the test interface unit and the sensing and monitoring module are detachable.

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