CN114089145A - Movable multi-channel thyristor long-term withstand voltage test equipment and test method - Google Patents
Movable multi-channel thyristor long-term withstand voltage test equipment and test method Download PDFInfo
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- CN114089145A CN114089145A CN202111401353.9A CN202111401353A CN114089145A CN 114089145 A CN114089145 A CN 114089145A CN 202111401353 A CN202111401353 A CN 202111401353A CN 114089145 A CN114089145 A CN 114089145A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/263—Circuits therefor for testing thyristors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
A long-term withstand voltage test device and a test method for a movable multi-channel thyristor are disclosed, the test device comprises a high-voltage test area and a low-voltage operation area which are arranged inside a test chamber shell, a multi-channel direct-current power supply circuit is arranged in the high-voltage test area, a plurality of groups of test tools are arranged on each direct-current power supply circuit, the test tools are distributed on a test insulating support, test articles are arranged on the test tools, each group of test tools are controlled to be opened and closed by high voltage acting on the test articles through an independent switch, and a control system is arranged in the low-voltage operation area. The test equipment has the function of simultaneously outputting multi-path independent direct current voltages, and simultaneously needs to be tested in different altitude areas for researching the long-term operation failure rate of the thyristors under different altitudes.
Description
Technical Field
The invention relates to the technical field of thyristor tests, in particular to a movable multi-channel thyristor long-term withstand voltage test device and a test method.
Background
A thyristor is a high power switching type semiconductor device. The thyristor need long-term live working in the actual work, in the aspect of studying long-term withstand voltage test thyristor failure rate, prior art can only carry out the long-term withstand voltage test of single-circuit thyristor to test equipment can't shift as a whole, and the test site is limited, and when one of them thyristor appeared unusual, the system can't be amputated it from the return circuit, can make other thyristors in the whole return circuit all pause test.
The prior art can only carry out the long-term withstand voltage test of a single-path thyristor and does not meet the long-term withstand voltage test conditions of a multi-path thyristor. Meanwhile, in the prior art, abnormal thyristors are repeatedly tested, so that the test assessment is severer under normal conditions, and the test efficiency is low. In order to research the long-term operation failure rate of thyristors at different altitudes, tests need to be carried out in different altitude areas, and test equipment in the prior art cannot be integrally transferred, so that the test site is limited.
The thyristor is used as a core component of the converter valve, and the performance reliability of the thyristor affects the safe operation of the converter valve and even a direct current transmission project, so that the long-term operation failure rate of the thyristor needs to be researched. The altitude is an important factor influencing the model selection of the thyristor and the withstand voltage value of the thyristor in the converter valve, so that the long-term operation failure rate of the thyristor under different altitudes needs to be researched.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides movable multi-channel thyristor long-term withstand voltage test equipment and a test method.
In order to achieve the purpose, the invention has the following technical scheme:
a movable multi-channel thyristor long-term withstand voltage test device comprises a high-voltage test area and a low-voltage operation area which are arranged inside a test chamber shell, wherein the high-voltage test area is provided with a plurality of direct-current power supply circuits, each direct-current power supply circuit is provided with a plurality of groups of test tools, the test tools are distributed on a test insulating support, test articles are arranged on the test tools, and each group of test tools adopt an independent switch to control high-voltage electricity acting on the test articles to be opened and closed; the low-voltage operation area is provided with a control system, when a certain test article fails, the control system gives an instruction to disconnect the failed test article from the high-voltage power supply, so that other test articles can continue to perform normal tests.
As a preferred scheme of the long-term withstand voltage test equipment of the movable multi-channel thyristor, a transformer is arranged on a direct current power circuit, a first side coil of the transformer is connected with a voltage regulator positioned in a low-voltage operation area, two ends of a second side coil of the transformer are connected with a silicon stack through a current-limiting resistor, circuits behind the silicon stack are connected together and connected with a high-voltage side of a resistor voltage divider, and a low-voltage side of the resistor voltage divider is grounded together with a middle tap of a second side coil of the transformer; the direct-current power supply circuit is also provided with a safety grounding switch, a filter capacitor and a plurality of groups of test tools in parallel connection with the resistor voltage divider, each group of test tool branches are arranged in parallel, each group of test tool branches is provided with a sampling resistor and a high-voltage connecting switch, and the high-voltage connecting switches are connected with the control system.
As a preferred scheme of the long-term withstand voltage test equipment of the movable multi-channel thyristor, the test tool comprises an insulating support column, a pneumatic switch, a high-voltage support, clamps and a current acquisition box which are arranged between an upper test insulating support and a lower test insulating support, a test object is fixed on the lower test insulating support through the clamps, the current acquisition box is installed on the clamps and connected with the test object, a direct-current power supply circuit passes through the middle of the upper test insulating support and the lower test insulating support, a pneumatic switch is arranged above each clamp through the high-voltage support, and the insulating support column is connected between the upper test insulating support and the high-voltage support; the pneumatic switch is connected with the control system, the pneumatic switch is moved upwards by giving an instruction through the control system, and the high-voltage connecting switch is turned on to disconnect the failed test article from the high-voltage electricity.
As a preferred scheme of the movable multi-channel thyristor long-term withstand voltage test equipment, the clamp comprises an upper layer metal panel and a lower layer metal panel, the upper layer metal panel and the lower layer metal panel are connected through an insulating bolt support, one side surface of a test article is attached to the upper layer metal panel, a support table is arranged on the lower layer metal panel, the other side surface of the test article is attached to a table top of the support table, and the height between the upper layer metal panel and the lower layer metal panel can be adjusted through the insulating bolt support to provide required pressure for the test article.
As a preferred scheme of the long-term withstand voltage test equipment for the movable multi-channel thyristor, the support table is made of an insulating material, the table top of the support table covers the surface of the electric conductor and is attached to the surface of the test object, the support table and the lower metal panel are provided with through holes which penetrate through the support table and the lower metal panel up and down, the electric conductor penetrates out of the through holes through the conductive upright columns, the bottom ends of the conductive upright columns are connected with metal bolts and are attached and fixed to the lower surface of the lower metal panel, and the current collection box is arranged outside the metal bolts.
As a preferred scheme of the long-term withstand voltage test equipment for the movable multi-channel thyristor, the control system comprises a PLC control cabinet and a data acquisition unit, wherein the PLC control cabinet acquires the output voltage of the multi-channel direct-current power supply line, the independent switch state of each group of test tools and the feedback data of the test articles through the data acquisition unit, and outputs instructions to adjust the output voltage of the multi-channel direct-current power supply line and the on-off of the independent switch of each group of test tools; and the PLC control cabinet is connected with a remote computer.
As a preferred scheme of the long-term withstand voltage test equipment for the movable multi-channel thyristor, a net-shaped isolation sliding door is arranged in the test chamber shell to separate a high-voltage test area from a low-voltage operation area.
As a preferred scheme of the long-term withstand voltage test equipment for the movable multi-channel thyristor, the high-voltage test area and the low-voltage operation area are both provided with cameras, and the high-voltage test area is provided with a smoke alarm.
The invention also provides a long-term withstand voltage test method for the movable multi-channel thyristor, which comprises the following steps:
respectively mounting a plurality of test articles on each group of test tools one by one, wherein each group of test tools adopt an independent switch to control the high-voltage on-off of the mounted test articles;
introducing high-voltage power required by the test through a direct-current power supply line, and collecting feedback data of each test sample;
when a certain test article has a fault, the control system gives an instruction to disconnect the test article with the fault from the high-voltage power supply, so that other test articles continue to perform normal tests.
As a preferred embodiment of the long-term withstand voltage test method for the movable multi-channel thyristor, the step of giving an instruction through the control system and disconnecting the failed test article from the high-voltage power supply comprises the following steps:
a transformer is arranged on the direct current power circuit, a first side coil of the transformer is connected with a voltage regulator positioned in a low-voltage operation area, two ends of a second side coil are connected with a silicon stack through a current-limiting resistor, the circuits behind the silicon stack are connected together and connected with the high-voltage side of a resistor voltage divider, and the low-voltage side of the resistor voltage divider is grounded together with a middle tap of the second side coil of the transformer; the direct-current power circuit is also provided with a safety grounding switch, a filter capacitor and a plurality of groups of test tools in parallel with the resistor divider, each group of test tool branches are arranged in parallel, each group of test tool branches is provided with a sampling resistor and a high-voltage connecting switch, and the high-voltage connecting switches are connected with the control system;
the test tool comprises an insulating support, a pneumatic switch, a high-voltage support, a clamp and a current collecting box, wherein the insulating support, the pneumatic switch, the high-voltage support, the clamp and the current collecting box are arranged between an upper test insulating support and a lower test insulating support; the pneumatic switch is connected with the control system, the pneumatic switch is moved upwards by giving an instruction through the control system, and the high-voltage connecting switch is turned on to disconnect the failed test article from the high-voltage electricity;
when the plurality of test articles are respectively installed on each group of test tools one by one, the bearing pressure of the test articles is adjusted through the clamp, so that the bearing pressure value of the test articles is larger than the required value.
Compared with the prior art, the invention at least has the following beneficial effects: in the prior art, in a long-term withstand voltage test of thyristors, when one thyristor is abnormal, a test system cannot cut the thyristor from a loop, so that other thyristors in the whole loop are all suspended for testing. In the prior art, only one path of direct current voltage can be output, and the test equipment has the function of outputting multiple paths of independent direct current voltages simultaneously. In order to research the long-term operation failure rate of thyristors under different altitudes, tests need to be carried out in different altitude areas, but in the prior art, test equipment cannot be integrally transferred, the test site is limited, the test equipment can be safely and conveniently integrally transferred, and the test site is not limited.
Furthermore, the prior art is that the tester reads the recorded data and can not transmit the data in a long distance; in the test process, the control system finishes data acquisition, data transmission and instruction control, and test data are remotely transmitted to the data center through a network.
Furthermore, the net-type isolation sliding door is arranged in the test chamber shell to separate the high-voltage test area from the low-voltage operation area, so that personnel can be prevented from entering the high-voltage test area by mistake, and meanwhile, the operators can visually see the internal condition of the high-voltage area in the operation area.
Furthermore, the upper surface and the lower surface of the clamp are processed by metal plates, contact surfaces of the clamp and the thyristor meet required values, and the upper contact surface and the lower contact surface of the thyristor are prevented from being damaged due to tests to influence later use; the upper metal plate and the lower metal plate are connected and fastened through high-strength insulating bolt supports, and the pressure value is larger than the required value of the test sample; an independent current collecting box is arranged below each group of test tools to collect the current of each group of test articles;
furthermore, the high-voltage test area and the low-voltage operation area are both provided with cameras, the high-voltage test area is provided with a smoke alarm and is provided with a monitoring and safety system, and the alarm is given in time when abnormal conditions occur, so that dangerous accidents are avoided.
Drawings
FIG. 1 is a schematic circuit diagram of the test apparatus of the present invention;
FIG. 2 is a front view of the internal layout of a test chamber of the test apparatus of the present invention;
FIG. 3 is a top view of the arrangement structure inside the test chamber of the test apparatus of the present invention;
FIG. 4 is a rear view of the internal layout of the test chamber of the test apparatus of the present invention;
FIG. 5 is a schematic view of a test fixture structure of the test equipment of the present invention;
FIG. 6 is a schematic view of a fixture structure of the test apparatus of the present invention;
FIG. 7 is a schematic view of the control system of the test apparatus of the present invention;
in the drawings: 1-test chamber outer shell; 2-a first control cabinet; 3-a second control cabinet; 4-a third control cabinet; 5-a voltage regulator; 6-a transformer; 7-silicon stack; an 8-resistor divider; 9-a filter capacitor; 10-test insulating support; 11-testing; 12-an insulating support; 13-copper bar; 14-a pneumatic switch; 15-high pressure support; 16-a clamp; 17-hanging air conditioner; 18-a camera; 19-floor type air conditioner; 20-smoke alarm; 21-a current collection box; 22-a metal panel; 23-insulating bolt support; and 24, supporting the table.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The long-term withstand voltage test equipment for the movable multi-channel thyristor, provided by the embodiment of the invention, has the functions of integrally moving and transporting and simultaneously outputting two paths of independent direct current voltages, data acquisition, data transmission and system control are completed by a control system in the test process, test data are remotely transmitted to a data center of a remote computer through a network, each group of test tools adopt independent switches to control the high-voltage on-off of the test articles 11, when one test article 11 fails, an instruction can be given by the control system, the pneumatic switch 14 moves upwards, and the failed high-voltage connection switch of the test article is simultaneously opened to disconnect the high-voltage connection switch from the high voltage, so that the other test articles 11 can be normally tested. The upper surface and the lower surface of the clamp 16 are processed by metal plates, contact surfaces of the clamp and the thyristor meet required values, and the upper contact surface and the lower contact surface of the thyristor are prevented from being damaged due to tests to influence later use; in addition, the upper and lower metal plates of the clamp 16 are connected and fastened by high-strength insulating bolt columns 23, and the pressure value is larger than the required value; an independent current collection box 21 is arranged below each group of test tools to collect the current of each group of test articles 11. And a thyristor is switched by a pneumatic switch 14, so that normal test can be ensured when no abnormal test sample appears.
Referring to fig. 2 to 4, the long-term withstand voltage testing apparatus for the movable multi-channel thyristor according to the embodiment of the present invention includes a high-voltage testing area and a low-voltage operating area disposed inside a testing chamber housing 1, and a mesh-type isolation sliding door disposed inside the testing chamber housing 1 separates the high-voltage testing area from the low-voltage operating area. The high-voltage test area is provided with a plurality of direct-current power supply circuits, each direct-current power supply circuit is provided with a plurality of groups of test tools, the test tools are distributed on the test insulating support 10, the test articles 11 are arranged on the test tools, and each group of test tools adopt an independent switch to control the high-voltage on/off of the test articles 11; the low-voltage operation area is provided with a control system, when a certain test article 11 has a fault, the control system gives an instruction to disconnect the test article 11 with the high-voltage electricity, so that other test articles 11 can continue to carry out normal tests. The high-voltage test area and the low-voltage operation area are both provided with cameras 18, the high-voltage test area is provided with a smoke alarm 20, and therefore alarming is timely carried out when abnormal conditions occur, and dangerous accidents are avoided.
Referring to fig. 1, in one embodiment, a transformer 6 is disposed on a dc power line, a first side coil of the transformer 6 is connected to a voltage regulator 5 located in a low voltage operating area, two ends of a second side coil are connected to a silicon stack 7 through a current limiting resistor, a circuit behind the silicon stack 7 is connected together and connected to a high voltage side of a resistor divider 8, and a low voltage side of the resistor divider 8 is grounded together with a center tap of the second side coil of the transformer 6; and a safety grounding switch, a filter capacitor 9 and a plurality of groups of test tools are further arranged on the direct-current power line in parallel connection with the resistor voltage divider 8, each group of test tool branches are arranged in parallel, each group of test tool branch is provided with a sampling resistor and a high-voltage connecting switch, and the high-voltage connecting switches are connected with the control system.
In FIG. 1, a component KM1And KM2Is a contactor, T1Is a voltage regulator; t is2Is a transformer; r1 is a current limiting resistor; g is a silicon stack; r2 is the high side of the resistor divider; r is0The low voltage side of the resistor divider; k is0Is a safe grounding switch; c is a filter capacitor; k is1To K50A high-voltage connecting switch; SCR (Selective catalytic reduction)1To SCR50A test thyristor; r is1To r50Is a sampling resistor.
Referring to fig. 5, in an embodiment, the test tool includes an insulating support 12, a pneumatic switch 14, a high voltage support 15, a clamp 16 and a current collecting box 21, the insulating support 12, the pneumatic switch 14, the high voltage support 15, the clamp 16 and the current collecting box 21 are arranged between the upper test insulating support 10 and the lower test insulating support 10, a test article 11 is fixed on the lower test insulating support 10 through the clamp 16, the current collecting box 21 is mounted on the clamp 16 and connected with the test article 11, a direct current power supply line passes through the middle of the upper test insulating support 10 and the lower test insulating support 10, one pneumatic switch 14 is arranged above each clamp 16 through the high voltage support 15, and the insulating support 12 is connected between the upper test insulating support 10 and the high voltage support 15; the pneumatic switch 14 is connected with the control system, and the control system gives instructions to move the pneumatic switch 14 upwards and open the high-voltage connection switch to disconnect the failed test article 11 from the high-voltage electricity. The pneumatic switch 14 takes a cylinder as power to realize the switching function.
Referring to fig. 6, the fixture 16 includes upper and lower metal panels 22, the upper and lower metal panels 22 are connected by an insulating bolt support 23, one side surface of the sample 11 is attached to the upper metal panel, a support table 24 is disposed on the lower metal panel, the other side surface of the sample 11 is attached to a table top of the support table 24, the height between the upper and lower metal panels 22 can be adjusted by the insulating bolt support 23 to provide the sample 11 with the required pressure, and the pressure value borne by the sample 11 during the test is greater than the required value. Supporting bench 24 adopts insulating material to make, and supporting bench 24's mesa covers the laminating of electric conductor and the surface of sample 11, and supporting bench 24 and lower floor's metal decking set up the through-hole that runs through from top to bottom, and the electric conductor is worn out by the through-hole through electrically conductive stand, and the bottom of electrically conductive stand is connected metal bolt and is fixed with the lower surface laminating of lower floor's metal decking, and current acquisition box 21 sets up at the metal bolt outside.
Referring to fig. 7, the control system includes a PLC control cabinet and a data acquisition unit, the PLC control cabinet acquires the output voltage of the multiple dc power lines, the independent switch state of each group of test tools, and the feedback data of the test sample 11 through the data acquisition unit, and outputs an instruction to adjust the output voltage of the multiple dc power lines and the on/off of the independent switch of each group of test tools; the PLC control cabinet is connected with a remote computer, and test data are remotely transmitted to the data center through a network.
Another embodiment further provides a long-term withstand voltage test method for the movable multi-way thyristor, which comprises the following steps:
(1) the thyristor is arranged on the clamp 16 according to requirements, and the insulating bolt upright column 23 is fastened to enable the bearing pressure value of the thyristor to be larger than the required value;
(2) the jig 16 was mounted on a test tool to perform a withstand voltage test.
The direct current power supply is divided into two paths, each path consists of a voltage regulator 5, a transformer 6, a silicon stack 7, a resistor voltage divider 8, a current-limiting resistor, a filter capacitor 9, a safety grounding switch and a plurality of groups of test tools, and the test tools are distributed on a test insulating support 10; each group of test tools adopts an independent switch to control the high-voltage opening and closing of the thyristors, when one thyristor breaks down, an instruction can be given by the control system, the pneumatic switch 14 moves upwards, and the high-voltage connecting switch of the failed thyristor is opened to disconnect the high-voltage connecting switch from the high voltage, so that the normal test of other test articles is ensured. In the whole test process, the control system finishes data acquisition, data transmission and system control, and test data are remotely transmitted to the data center through a network.
The invention can complete the long-term withstand voltage research of the thyristor safely, reliably and efficiently. The test equipment components are all arranged in the test chamber shell, and during actual test, the test chamber can be integrally transported to an actual test site for long-term voltage withstand test, so that the test can be simultaneously carried out on a plurality of thyristors for long-term voltage withstand test, and can be carried out in different altitude areas.
The present invention has been described above with reference to specific features and embodiments thereof, and it is apparent that various modifications and combinations thereof can be made without departing from the spirit and scope of the invention. Accordingly, the contents of the above specification and drawings are merely illustrative of the invention as defined by the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It is apparent that those skilled in the art can make various modifications and variations to the present invention, which also fall within the scope of the claims of the present invention and their equivalents.
Claims (10)
1. A movable multi-channel thyristor long-term withstand voltage test device is characterized by comprising a high-voltage test area and a low-voltage operation area which are arranged inside a test bin shell (1), wherein the high-voltage test area is provided with a multi-channel direct-current power supply circuit, each direct-current power supply circuit is provided with a plurality of groups of test tools, the test tools are distributed on a test insulating support (10), a test article (11) is arranged on the test tools, and each group of test tools adopts an independent switch to control the high-voltage switch acting on the test article (11); the low-voltage operation area is provided with a control system, when a certain test article (11) breaks down, the control system gives an instruction to disconnect the broken test article (11) from the high-voltage electricity, so that other test articles (11) can continue to perform normal tests.
2. The long-term withstand voltage test equipment of the movable multi-way thyristor according to claim 1, characterized in that: a transformer (6) is arranged on the direct current power circuit, a first side coil of the transformer (6) is connected with a voltage regulator (5) positioned in a low-voltage operation area, two ends of a second side coil are connected with a silicon stack (7) through a current-limiting resistor, circuits behind the silicon stack (7) are connected together and connected with a high-voltage side of a resistor voltage divider (8), and a low-voltage side of the resistor voltage divider (8) is grounded together with a middle tap of the second side coil of the transformer (6); the direct-current power supply circuit is also provided with a safety grounding switch, a filter capacitor (9) and a plurality of groups of test tools in parallel connection with the resistor voltage divider (8), each group of test tool branches are arranged in parallel, each group of test tool branches is provided with a sampling resistor and a high-voltage connecting switch, and the high-voltage connecting switches are connected with the control system.
3. The long-term withstand voltage test equipment of the movable multi-way thyristor according to claim 2, characterized in that: the test tool comprises an insulating support (12), a pneumatic switch (14), high-voltage supports (15), clamps (16) and a current collection box (21), wherein the insulating support (12), the pneumatic switch (14), the high-voltage supports (15), the clamps (16) and the current collection box (21) are arranged between an upper test insulating support (10) and a lower test insulating support (10), a test article (11) is fixed on the lower test insulating support (10) through the clamps (16), the current collection box (21) is installed on the clamps (16) and connected with the test article (11), a direct-current power supply circuit passes through the middle of the upper test insulating support (10) and the lower test insulating support (10), the pneumatic switch (14) is arranged above each clamp (16) through the high-voltage supports (15), and the insulating support (12) is connected between the upper test insulating support (10) and the high-voltage supports (15); the pneumatic switch (14) is connected with the control system, the control system gives instructions to move the pneumatic switch (14) upwards, and the high-voltage connection switch is opened to disconnect the failed test article (11) from the high-voltage electricity.
4. The long-term withstand voltage test equipment of the movable multi-way thyristor according to claim 3, characterized in that: anchor clamps (16) including upper and lower two-layer metal decking (22), upper and lower two-layer metal decking (22) link to each other through insulating bolt pillar (23), a side surface and the upper metal decking of sample (11) laminate mutually, are provided with brace table (24) on the metal decking of lower floor, the opposite side surface of sample (11) laminates with the mesa of brace table (24), through insulating bolt pillar (23) can adjust the height between upper and lower two-layer metal decking (22), provide the required pressure of sample (11).
5. The long-term withstand voltage test equipment of the movable multi-way thyristor according to claim 4, wherein: supporting bench (24) adopt insulating material to make, the mesa of supporting bench (24) covers the laminating of the surface of electric conductor and sample (11), and supporting bench (24) and lower floor's metal decking set up the through-hole that runs through from top to bottom, the electric conductor is worn out by the through-hole through electrically conductive stand, and metal bolt and lower floor's metal decking's lower surface laminating is fixed to electrically conductive stand's bottom connection metal bolt, current acquisition box (21) set up in the metal bolt outside.
6. The long-term withstand voltage test equipment of the movable multi-way thyristor according to claim 1, characterized in that: the control system comprises a PLC control cabinet and a data acquisition unit, the PLC control cabinet acquires the output voltage of the multi-path direct-current power supply line, the independent switch state of each group of test tools and the feedback data of the test articles (11) through the data acquisition unit, and outputs instructions to adjust the output voltage of the multi-path direct-current power supply line and the on-off of the independent switch of each group of test tools; the PLC control cabinet is connected with a remote computer.
7. The long-term withstand voltage test equipment of the movable multi-way thyristor according to claim 1, characterized in that: the inside net type isolation sliding door that sets up of test chamber shell (1) separates high-pressure test district and low pressure operation district.
8. The long-term withstand voltage test equipment of the movable multi-way thyristor according to claim 1, characterized in that: the high-voltage test area and the low-voltage operation area are both provided with cameras (18), and the high-voltage test area is provided with a smoke alarm (20).
9. A long-term withstand voltage test method for a movable multi-channel thyristor is characterized by comprising the following steps:
respectively mounting a plurality of test articles (11) on each group of test tools one by one, wherein each group of test tools adopt independent switches to control the high-voltage on-off of the mounted test articles (11);
high voltage needed by the test is introduced through a direct current power supply line, and feedback data of each test article (11) is collected;
when a certain test article (11) has a fault, the control system gives an instruction to disconnect the test article (11) with the fault from the high-voltage power supply, so that other test articles (11) continue to carry out normal tests.
10. The long-term withstand voltage test method of the movable multi-way thyristor according to claim 9, wherein the step of giving an instruction through the control system to disconnect the failed test article (11) from the high-voltage power supply comprises the following steps:
a transformer (6) is arranged on the direct current power circuit, a first side coil of the transformer (6) is connected with a voltage regulator (5) positioned in a low-voltage operation area, two ends of a second side coil are connected with a silicon stack (7) through a current-limiting resistor, circuits behind the silicon stack (7) are connected together and connected with a high-voltage side of a resistor voltage divider (8), and a low-voltage side of the resistor voltage divider (8) is grounded together with a middle tap of the second side coil of the transformer (6); the direct-current power supply circuit is also provided with a safety grounding switch, a filter capacitor (9) and a plurality of groups of test tools in parallel connection with the resistor voltage divider (8), each group of test tool branches are arranged in parallel, each group of test tool branches is provided with a sampling resistor and a high-voltage connecting switch, and the high-voltage connecting switches are connected with the control system;
the test tool comprises an insulating support (12), a pneumatic switch (14), high-voltage supports (15), a clamp (16) and a current collection box (21), wherein the insulating support (12), the pneumatic switch (14), the high-voltage supports (15), the clamp (16) and the current collection box (21) are arranged between an upper test insulating support (10) and a lower test insulating support (10), the test article (11) is fixed on the lower test insulating support (10) through the clamp (16), the current collection box (21) is arranged on the clamp (16) and connected with the test article (11), a direct-current power supply circuit passes through the middle of the upper test insulating support (10) and the lower test insulating support (10), the pneumatic switch (14) is arranged above each clamp (16) through the high-voltage supports (15), and the insulating support (12) is connected between the upper test insulating support (10) and the high-voltage supports (15); the pneumatic switch (14) is connected with the control system, the control system gives instructions to move the pneumatic switch (14) upwards, and the high-voltage connection switch is opened to disconnect the failed test article (11) from the high-voltage electricity;
when the plurality of test articles (11) are respectively installed on each group of test tools one by one, the pressure borne by the test articles (11) is adjusted through the clamp (16), so that the pressure borne by the test articles (11) is larger than the required value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111401353.9A CN114089145B (en) | 2021-11-19 | 2021-11-19 | Movable multi-path thyristor long-term withstand voltage test equipment and test method |
Applications Claiming Priority (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115792552A (en) * | 2022-11-11 | 2023-03-14 | 中国南方电网有限责任公司超高压输电公司广州局 | Thyristor detection device and method |
| CN116125239A (en) * | 2022-12-21 | 2023-05-16 | 北京智慧能源研究院 | Thyristor failure test device and test system thereof |
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| CN116125239A (en) * | 2022-12-21 | 2023-05-16 | 北京智慧能源研究院 | Thyristor failure test device and test system thereof |
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