An automatic high-voltage transformer error and excitation characteristic testing device

Abstract

The present invention discloses a fully automatic high-voltage transformer error and excitation characteristic test device, which includes an aluminum profile frame. An inductor primary side wiring mechanism, an inductor secondary side wiring mechanism and an electrical measurement function module are installed on the aluminum profile frame. An electrical measurement instrument is placed under the aluminum profile frame. The inductor primary side wiring mechanism includes a guide rod cylinder 1, a guide rod 1, an insulator, a conductive copper bar, an inductor primary side X contact terminal and an inductor primary side A contact terminal. The present invention has high-efficiency integration and small floor area. The device proposed in this solution can successively carry out error tests and excitation characteristic tests on high-voltage voltage transformers, integrating the two tests into one, with a high degree of automation. It can realize the automatic transfer, automatic conveying, automatic connection and disconnection of wires, automatic test switching, and automatic upload of test data of high-voltage transformers, and can complete all tests automatically with centralized management, high reliability and full process automation. It is applicable to the verification of high-voltage transformers.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage metering detection, and particularly to a fully automatic test device for the error and excitation characteristics of high-voltage transformers. Background Art

[0002] The demand for high-voltage voltage transformers has increased with the further expansion of the market, and the detection of high-voltage voltage transformers is facing increasing pressure. At present, the detection methods for the error and excitation characteristics of high-voltage transformers are inefficient, and the management and control means are backward, and a set of safe and effective centralized integrated control scheme has not been formed. In the current industry, the test devices generally have problems such as single function, separate sets, and incomplete equipment configuration functions. As a result, in order to complete the error and excitation characteristic tests, detection devices for each test need to be equipped. During the tests, manual handling work is also required between different detection devices, which will inevitably increase the equipment purchase cost and labor cost. At the same time, the switching between different tests requires manual repeated disconnection and connection of wires, which inevitably increases the safety hazards of personnel operations and the test error rate caused by wiring deviations. Summary of the Invention

[0003] The purpose of the present invention is to provide a fully automatic test device for the error and excitation characteristics of high-voltage transformers.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A fully automatic test device for the error and excitation characteristics of high-voltage transformers, including an aluminum profile frame, on which a primary side wiring mechanism of the transformer, a secondary side wiring mechanism of the transformer, and an electrical measurement function module are installed, and an electrical measuring instrument is placed below the aluminum profile frame;

[0005] The primary side wiring mechanism of the transformer includes a guide rod cylinder 1, a guide rod 1, an insulator, a conductive copper bar, a primary side X contact terminal of the transformer, and a primary side A contact terminal of the transformer. The primary side X contact terminal and the primary side A contact terminal of the transformer are connected through the conductive copper bar. The insulator is installed on the conductive copper bar. A bracket is installed at the top of the insulator. The guide rod 1 is installed on the bracket. The telescopic end of the guide rod cylinder 1 is installed on the bracket;

[0006] The secondary side wiring mechanism of the transformer includes a guide rod cylinder 2, a guide rod 2, and a secondary side contact terminal of the transformer;

[0007] The guide rod cylinder 2 is installed on the mounting seat. The telescopic end of the guide rod cylinder 2 and the guide rod 2 are both installed on the profile bracket body. The secondary side contact terminal of the transformer is installed above and below the profile bracket body;

[0008] The electrical measurement function module includes a switching control module, an error switching module, a programmable power source to self-boosting standard voltage transformer contactor, a programmable power source to excitation characteristic tester contactor, and a module power supply. The switching control module is signal-connected to the tester, the switching control module is signal-connected to the error switching module, the tester is signal-connected to the industrial control computer, and the tester is signal-connected to the programmable power source to self-boosting standard voltage transformer contactor;

[0009] The electrical measuring instrument includes a programmable power source and a standard voltage transformer. The programmable power source to self-boosting standard voltage transformer contactor is signal-connected to the programmable power source, and the programmable power source is signal-connected to the standard voltage transformer.

[0010] Preferably, a limiting plate is installed on the first guide rod cylinder, and the first guide rod penetrates through the limiting plate and is movably connected to the limiting plate.

[0011] Preferably, the number of the mounting seats is three, and the number of the second guide rods is two. The two mounting seats are respectively sleeved on the two second guide rods.

[0012] Preferably, a high-voltage cable insulating bracket is installed inside the aluminum profile frame.

[0013] Preferably, the number of the module power supplies is two.

[0014] Preferably, the programmable power source to excitation characteristic tester contactor is arranged on one side of the programmable power source to self-boosting standard voltage transformer contactor.

[0015] Preferably, the error switching module is arranged above the switching control module.

[0016] Preferably, the switching control module is arranged above the module power supply.

[0017] The present invention provides a full-automatic high-voltage transformer error and excitation characteristic test device, which has the following beneficial effects:

[0018] 1. High-efficiency integration and small floor area. The device proposed in this solution can sequentially carry out error tests and excitation characteristic tests on high-voltage voltage transformers, integrating the two tests into one.

[0019] 2. High degree of automation. It can realize the automatic transfer, automatic conveying, automatic connection and disconnection of wires, automatic switching of tests, and automatic uploading of test data of high-voltage transformers, and can complete all tests automatically with centralized management, high reliability and full process automation.

[0020] 3. Low hardware cost. Since some test circuits for voltage transformer error and excitation characteristic tests can be shared, the reuse of equipment and circuits is greatly improved, and the hardware cost is reduced.

[0021] 4. Reduce manual intervention and be safer. The device provided by the present invention can realize the automatic transfer, automatic conveying, automatic connection and disconnection of wires, and automatic switching of tests for high-voltage mutual inductors, without manual intervention, avoiding potential safety hazards brought by the tests.

[0022] 5. High accuracy of test data. The device provided by the present invention adopts a flexible crimping mechanism to achieve reliable contact between the test end and the test object, ensuring the accuracy of test data. Description of the Drawings

[0023] Figure 1 is a perspective view of the present invention;

[0024] Figure 2 is a front view of the present invention;

[0025] Figure 3 is a left view of the present invention;

[0026] Figure 4 is a schematic structural diagram of the primary-side wiring mechanism of the mutual inductor of the present invention;

[0027] Figure 5 is a schematic structural diagram of the secondary-side wiring mechanism of the mutual inductor of the present invention;

[0028] Figure 6 is a schematic structural diagram of the electrical measurement function module of the present invention.

[0029] In the figure: 1 aluminum profile frame, 2 primary-side wiring mechanism of the mutual inductor, 21 guide rod cylinder 1, 22 guide rod 1, 23 insulator, 24 conductive copper bar, 25 primary-side X contact terminal of the mutual inductor, 26 primary-side A contact terminal of the mutual inductor, 3 secondary-side wiring mechanism of the mutual inductor, 31 guide rod cylinder 2, 32 guide rod 2, 33 secondary-side contact terminal of the mutual inductor, 4 electrical measurement function module, 41 switching control module, 42 error switching module, 43 contactor from the program control source to the self-boosting standard voltage mutual inductor, 44 contactor from the program control source to the excitation characteristic tester, 45 module power supply, 5 electrical measurement instrument, 51 program control source, 52 standard voltage mutual inductor, 6 high-voltage cable insulation bracket. Detailed Embodiments

[0030] As Figures 1-6 shown, the present invention provides a technical solution: a fully automatic high-voltage mutual inductor error and excitation characteristic test device, including an aluminum profile frame 1, characterized in that: a primary-side wiring mechanism 2 of the mutual inductor, a secondary-side wiring mechanism 3 of the mutual inductor and an electrical measurement function module 4 are installed on the aluminum profile frame 1, an electrical measurement instrument 5 is placed below the aluminum profile frame 1, and a high-voltage cable insulation bracket 6 is installed inside the aluminum profile frame 1.

[0031] The primary side wiring mechanism 2 of the mutual inductor includes a guide rod cylinder 1 21, a guide rod 1 22, an insulator 23, a conductive copper bar 24, a primary side X contact terminal 25 of the mutual inductor, and a primary side A contact terminal 26 of the mutual inductor. The primary side X contact terminal 25 and the primary side A contact terminal 26 of the mutual inductor are connected through the conductive copper bar 24. The insulator 23 is installed on the conductive copper bar 24. A bracket is installed on the top of the insulator 23. The guide rod 1 22 is installed on the bracket. The telescopic end of the guide rod cylinder 1 21 is installed on the bracket. A limit plate is installed on the guide rod cylinder 1 21. The guide rod 1 22 passes through the limit plate and is movably connected to the limit plate.

[0032] The secondary side wiring mechanism 3 of the mutual inductor includes a guide rod cylinder 2 31, a guide rod 2 32, and a secondary side contact terminal 33 of the mutual inductor.

[0033] The guide rod cylinder 2 31 is installed on the mounting seat. The telescopic end of the guide rod cylinder 2 31 and the guide rod 2 32 are both installed on the profile bracket body. The secondary side contact terminal 33 of the mutual inductor is installed above and below the profile bracket body. The number of mounting seats is three. The number of guide rods 2 32 is two. The two mounting seats are respectively sleeved on the two guide rods 2 32.

[0034] The electrical measurement function module 4 includes a switching control module 41, an error switching module 42, a programmable power source to self-boosting standard voltage mutual inductor contactor 43, a programmable power source to excitation characteristic tester contactor 44, and a module power supply 45. The switching control module 41 is signal-connected to the tester. The switching control module 41 is signal-connected to the error switching module 42. The tester is signal-connected to the industrial control computer. The tester is signal-connected to the programmable power source to self-boosting standard voltage mutual inductor contactor 43. The number of module power supplies 45 is two. The programmable power source to excitation characteristic tester contactor 44 is arranged on one side of the programmable power source to self-boosting standard voltage mutual inductor contactor 43. The error switching module 42 is arranged above the switching control module 41. The switching control module 41 is arranged above the module power supply 45.

[0035] The electrical measurement instrument 5 includes a programmable power source 51 and a standard voltage mutual inductor 52. The programmable power source to self-boosting standard voltage mutual inductor contactor 43 is signal-connected to the programmable power source 51. The programmable power source 51 is signal-connected to the standard voltage mutual inductor 52.

[0036] During use, after the voltage mutual inductor under test is conveyed by the roller conveyor line and positioned at the verification station, it automatically enters the error test process. The error test is carried out by simultaneously boosting the voltage of 6 test samples to the specified points (rated voltage 80%, 100%, 120%) and switching the stations for verification in sequence.

[0037] Start the primary side wiring mechanism 2 and secondary side wiring mechanism 3 of the mutual inductor, and connect the primary and secondary terminals of the test object. The A ends of the primary terminals of 6 test voltage mutual inductors are connected in parallel with the high-voltage end of the self-boosting standard voltage mutual inductor 52 through the X contact terminal 25 on the primary side of the mutual inductor.

[0038] After the wiring is completed, the software sets information such as the transformation ratio, accuracy, and secondary load of the test object.

[0039] The industrial control computer sends an instruction to the main control calibrator, and the contactor 43 from the program-controlled power source to the self-boosting standard voltage mutual inductor acts, thereby controlling the program-controlled power source 51 to output voltage to the input end of the self-boosting standard voltage mutual inductor 52. When the voltage at the high-voltage end of the self-boosting standard voltage mutual inductor 52 rises to 80% of the rated voltage of the test mutual inductor, the voltage is maintained.

[0040] The calibrator controls the switching control module 41 to output a station instruction, and the error switching module 42 connects the secondary wiring terminals of 6 test objects to the test circuit respectively according to the station instruction, and tests and parameters the test data.

[0041] The calibrator analyzes and processes the test data and uploads the data to the industrial control computer.

[0042] The industrial control computer sends an instruction to the main control calibrator, and the contactor 43 from the program-controlled power source to the self-boosting standard voltage mutual inductor acts, thereby controlling the program-controlled power source 51 to output voltage to the input end of the self-boosting standard voltage mutual inductor 52. When the voltage at the high-voltage end of the self-boosting standard voltage mutual inductor 52 rises to 100% of the rated voltage of the test mutual inductor, the voltage is maintained.

[0043] The calibrator controls the switching control module 41 to output a station instruction, and the error switching module 42 connects the secondary wiring terminals of 6 test objects to the test circuit respectively according to the station instruction, and tests and parameters the test data.

[0044] The calibrator analyzes and processes the test data and uploads the data to the industrial control computer.

[0045] The industrial control computer sends an instruction to the main control calibrator, and the contactor 43 from the program-controlled power source to the self-boosting standard voltage mutual inductor acts, thereby controlling the program-controlled power source 51 to output voltage to the input end of the self-boosting standard voltage mutual inductor 52. When the voltage at the high-voltage end of the self-boosting standard voltage mutual inductor 52 rises to 120% of the rated voltage of the test mutual inductor, the voltage is maintained.

[0046] The calibrator controls the switching control module 41 to output a station instruction, and the error switching module 42 connects the secondary wiring terminals of 6 test objects to the test circuit respectively according to the station instruction, and tests and parameters the test data.

[0047] The calibrator analyzes and processes the test data and uploads the data to the industrial control computer. The test is over.

[0048] After the experiment, the primary side wiring mechanism 2 of the mutual inductor and the secondary side wiring mechanism 3 of the mutual inductor are automatically reset.

[0049] When the error test of the tested voltage mutual inductor is qualified, it automatically enters the excitation characteristic test process.

[0050] Start the secondary side wiring mechanism 3 of the mutual inductor, and the primary terminals of the 6 tested voltage mutual inductors are in an open state.

[0051] After the wiring is completed, the software sets information such as the transformation ratio, accuracy, and secondary load of the tested product.

[0052] The industrial control computer sends instructions to the excitation characteristic tester. Through the internal switching module of the instrument, the secondary wiring terminals of the 6 tested products are respectively connected to the excitation characteristic test state. The excitation characteristic tester applies the secondary rated power frequency voltage to the secondary winding and measures the effective value Ic1 of the excitation current at this time.

[0053] Then raise the voltage applied to the secondary to 2 times (1.5 times for 20 kV) of the secondary rated voltage, and then measure the effective value Ic2 of the excitation current.

[0054] The excitation characteristic tester analyzes and processes the test data and uploads the data to the industrial control computer. If the ratio of the two currents is not greater than 15 (i.e., Ic2 / Ic1 ≤ 15), it can be judged that the excitation characteristic test of the mutual inductor at this station is qualified, otherwise it is unqualified.

[0055] After the experiment, the wiring mechanism is automatically reset.

[0056] The present invention is highly integrated and has a small floor area. The device proposed in this solution can sequentially carry out error tests and excitation characteristic tests on high-voltage voltage mutual inductors, integrating the two tests into one, with a high degree of automation. It can realize the automatic transfer, automatic conveying, automatic connection and disconnection of wires, automatic switching of tests, and automatic uploading of test data of high-voltage mutual inductors, achieving centralized management, high reliability, and fully automatic completion of all tests with low hardware costs. In view of the fact that some test circuits for voltage mutual inductor error and excitation characteristic tests can be shared, the reuse of equipment and circuits is greatly improved, the hardware cost is reduced, the manual participation is reduced, and it is safer. The device provided by the present invention can realize the automatic transfer, automatic conveying, automatic connection and disconnection of wires, and automatic switching of tests of high-voltage mutual inductors without manual participation, avoiding potential safety hazards that may be brought by the tests, and the test data has high accuracy. The device provided by the present invention uses a flexible crimping mechanism to achieve reliable contact between the test end and the tested product, ensuring the accuracy of test data.

Claims

1. A fully automatic high-voltage transformer error and excitation characteristic test device, including an aluminum profile frame (1), characterized in that: An instrument transformer primary side wiring mechanism (2), an instrument transformer secondary side wiring mechanism (3), and an electrical measurement function module (4) are installed on the aluminum profile frame (1), and an electrical measuring instrument (5) is placed below the aluminum profile frame (1); The instrument transformer primary side wiring mechanism (2) includes a guide rod cylinder one (21), a guide rod one (22), an insulator (23), a conductive copper bar (24), an instrument transformer primary side X contact terminal (25), and an instrument transformer primary side A contact terminal (26). The instrument transformer primary side X contact terminal (25) and the instrument transformer primary side A contact terminal (26) are connected through the conductive copper bar (24). The insulator (23) is installed on the conductive copper bar (24). A bracket is installed on the top of the insulator (23). The guide rod one (22) is installed on the bracket. The telescopic end of the guide rod cylinder one (21) is installed on the bracket; The instrument transformer secondary side wiring mechanism (3) includes a guide rod cylinder two (31), a guide rod two (32), and an instrument transformer secondary side contact terminal (33); The guide rod cylinder two (31) is installed on the mounting seat. The telescopic end of the guide rod cylinder two (31) and the guide rod two (32) are both installed on the profile bracket body. The instrument transformer secondary side contact terminal (33) is installed above and below the profile bracket body; The electrical measurement function module (4) includes a switching control module (41), an error switching module (42), a program-controlled source to self-boosting standard voltage transformer contactor (43), a program-controlled source to excitation characteristic tester contactor (44), and a module power supply (45). The switching control module (41) is signal-connected to the tester. The switching control module (41) is signal-connected to the error switching module (42). The tester is signal-connected to the industrial control computer. The tester is signal-connected to the program-controlled source to self-boosting standard voltage transformer contactor (43); The electrical measuring instrument (5) includes a program-controlled source (51) and a standard voltage transformer (52). The program-controlled source to self-boosting standard voltage transformer contactor (43) is signal-connected to the program-controlled source (51). The program-controlled source (51) is signal-connected to the standard voltage transformer (52); A limit plate is installed on the guide rod cylinder one (21). The guide rod one (22) passes through the limit plate and is movably connected to the limit plate; The number of the mounting seats is three. The number of the guide rods two (32) is two. The two mounting seats are respectively sleeved on the two guide rods two (32); A high-voltage cable insulating bracket (6) is installed inside the aluminum profile frame (1); The number of the module power supplies (45) is two.

2. The fully automatic high-voltage transformer error and excitation characteristic testing device according to claim 1, characterized in that: The program-controlled source to excitation characteristic tester contactor (44) is arranged on one side of the program-controlled source to self-boosting standard voltage transformer contactor (43).

3. The fully automatic high-voltage mutual inductor error and excitation characteristic test device according to claim 1, characterized in that: The error switching module (42) is arranged above the switching control module (41).

4. A fully automatic high-voltage transformer error and excitation characteristic testing device according to claim 1, characterized in that: The switching control module (41) is arranged above the module power supply (45).

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