CN117092462A - Pressure-resistant test equipment - Google Patents
Pressure-resistant test equipment Download PDFInfo
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- CN117092462A CN117092462A CN202311058672.3A CN202311058672A CN117092462A CN 117092462 A CN117092462 A CN 117092462A CN 202311058672 A CN202311058672 A CN 202311058672A CN 117092462 A CN117092462 A CN 117092462A
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- voltage
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- variable frequency
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- 238000012360 testing method Methods 0.000 title claims abstract description 81
- 230000005284 excitation Effects 0.000 claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Abstract
The application provides a withstand voltage test device, which relates to the technical field of series resonance withstand voltage tests and is used for solving the technical problem of low test efficiency of the withstand voltage test device. Through fixing variable frequency power supply and excitation transformer at same platform, the system is highly integrated, need not extra assembly, only need accomplish the switching-in of external power supply and send out the grafting of power cord can, the balance need not the wiring.
Description
Technical Field
The application relates to the technical field of series resonance withstand voltage test, in particular to withstand voltage test equipment.
Background
The 220kV alternating-current submarine cable is a main cable for transmitting electric quantity of offshore wind power, and the length and the capacity of the 220kV alternating-current submarine cable are gradually increased as the offshore wind farm is further and further away from the shore in order to meet the requirements of the submarine cable for offshore wind power. The submarine cable needs to be subjected to series resonance withstand voltage test by using withstand voltage test equipment in the laying completion stage and the operation and maintenance detection stage so as to test the insulation characteristics of the cable, discover and prevent defects of the cable and ensure safe and reliable operation of the cable.
In the related art, the withstand voltage test equipment comprises a variable frequency power supply, an excitation transformer, a reactor and a voltage divider, wherein the variable frequency power supply is used for changing a 220V/380V and 50HZ power supply into a power supply with adjustable frequency and continuously adjustable voltage, and integrates the functions of operation, protection, control and monitoring; the exciting transformer is electrically connected with the variable frequency power supply through a connecting wire and is used for boosting the voltage output by the variable frequency power supply and isolating high voltage from low voltage; the high-voltage reactor is connected with the test cable in series, and is used for generating series resonance with the test article; the voltage divider is connected with the test cable in parallel and is used for measuring the high-voltage value and the low-voltage value of the test cable. The frequency modulation power output by the variable frequency power supply is coupled to the series resonant circuit of the high-voltage reactor and the test cable through the exciting transformer so as to provide exciting power and realize withstand voltage test on the test cable.
However, the above pressure resistance test apparatus is low in test efficiency.
Disclosure of Invention
In view of the above problems, embodiments of the present application provide a withstand voltage test apparatus, which solves the problem of low test efficiency of the withstand voltage test apparatus in the related art.
In order to achieve the above object, the embodiment of the present application provides the following technical solutions:
the embodiment of the application provides a withstand voltage test device which comprises a bottom plate, a variable frequency power supply and an excitation transformer, wherein the variable frequency power supply and the excitation transformer are fixedly arranged on the top surface of the bottom plate, the variable frequency power supply is configured to be connected with an external power supply, the variable frequency power supply is also electrically connected with the excitation transformer, and the excitation transformer is configured to boost the voltage output by the variable frequency power supply so as to conduct a withstand voltage test on a cable to be tested.
In one possible implementation manner, the pressure-resistant test apparatus further includes: a high voltage reactor configured to be connected in series with both the excitation transformer and the cable to be tested, and a voltage divider configured to be connected in parallel with the cable to be tested.
In one possible implementation, the side wall of the bottom plate is provided with a plurality of connection lugs, which are arranged at intervals along the circumference of the bottom plate.
In one possible implementation manner, the withstand voltage test apparatus further includes an outer housing fixedly connected to the top surface of the bottom plate, and the variable frequency power supply is disposed in the outer housing.
In one possible implementation, the outer housing is made of stainless steel.
In one possible implementation, the first outer surface of the outer housing is provided with a control console.
In one possible implementation, the exciting transformer is provided with an off-load switch configured to automatically regulate the voltage of the exciting transformer.
In one possible implementation manner, the exciting transformer includes a high-voltage output end and a low-voltage output end, wherein the high-voltage output end is arranged on a first side surface of the exciting transformer, and the low-voltage output end is arranged on a second side surface of the exciting transformer; the no-load change-over switch is arranged on the second side face and is connected with the low-voltage output end.
In one possible implementation manner, the exciting transformer further comprises an input terminal, a low-voltage output sleeve and a high-voltage output sleeve, the first side surface is provided with a low-voltage output sleeve mounting port, and the high-voltage output sleeve is connected with the high-voltage output sleeve mounting port through a first connecting bolt; the second side surface is provided with an input terminal mounting opening, and the input terminal is arranged at the input terminal mounting opening; the second side is provided with a low-voltage output sleeve mounting port, and the low-voltage output sleeve is connected with the low-voltage output sleeve mounting port through a second connecting bolt.
In one possible implementation, the no-load switch is connected to the low-voltage output via a connection copper sheet.
The voltage withstand test equipment comprises a variable frequency power supply, an exciting transformer and a bottom plate, wherein the variable frequency power supply and the exciting transformer are fixedly arranged on the top surface of the bottom plate, the variable frequency power supply is configured to be connected with an external power supply, the variable frequency power supply is also electrically connected with the exciting transformer, and the exciting transformer is configured to boost the voltage output by the variable frequency power supply so as to conduct a voltage withstand test on a cable to be tested. Through fixing variable frequency power supply and excitation transformer at same platform, the system is highly integrated, need not extra assembly, only need accomplish the switching-in of external power supply and send out the grafting of power cord can, the balance need not the wiring.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pressure test apparatus according to an embodiment of the present application;
fig. 2 is a schematic diagram of operation of the pressure test apparatus according to the embodiment of the present application.
Reference numerals illustrate:
100: a variable frequency power supply;
101: controlling an operation table; 102: an external power interface;
200: an exciting transformer;
201: an unloaded switch; 202: an input terminal; 203: a high voltage output sleeve; 204: the top of the exciting transformer; 205: reinforcing ribs;
300: a bottom plate;
301: a connecting lug;
400: a high voltage reactor;
500: a voltage divider;
600: the cable to be tested.
Detailed Description
As described in the background art, the related art withstand voltage test apparatus has the technical problem of low test efficiency, and the technical researches find that the above problem occurs because the variable frequency power supply, the exciting transformer, the reactor and the voltage divider which form the withstand voltage test apparatus in the related art are separately arranged, the components are required to be connected before the test, and the components are required to be disassembled after the test, so that a great deal of manpower, financial resources and time are required for each test, the test efficiency is low and the test cost is high. Meanwhile, the 220kV alternating-current submarine cable is large in length and capacity, the stability of withstand voltage test equipment cannot be guaranteed through simple circuit connection, the reliability of an excitation power supply under high current is poor, and the test requirement is difficult to meet.
In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application provides a withstand voltage test device, and referring to fig. 1, fig. 1 is a schematic structural diagram of the withstand voltage test device provided by the embodiment of the application; the withstand voltage test equipment comprises a variable frequency power supply 100, an exciting transformer 200 and a bottom plate 300, wherein the variable frequency power supply 100 and the exciting transformer 200 are fixedly arranged on the top surface of the bottom plate 300, and the variable frequency power supply 100 and the exciting transformer 200 are welded on the top surface of the bottom plate 300; the variable frequency power supply 100 is configured to be connected with an external power supply, the variable frequency power supply 100 is electrically connected with the exciting transformer 200 through a connecting wire, and the exciting transformer 200 is configured to boost the voltage output by the variable frequency power supply 100, isolate high voltage from low voltage and realize withstand voltage test of a cable to be tested.
According to the withstand voltage test equipment provided by the embodiment of the application, the variable frequency power supply 100 and the exciting transformer 200 are fixed on the same platform, so that the system is highly integrated, additional assembly is not needed, the connection of an external power supply and the connection of a power supply wire are only needed, and the rest is not needed to be wired.
Meanwhile, after the pressure-resistant test equipment is transported to a test site by a truck, the test personnel can directly carry out the vehicle-mounted test.
It should be noted that the withstand voltage test equipment of the embodiment of the application is suitable for testing 220kV ultra-long submarine cable lines.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating operation of the pressure test apparatus according to the embodiment of the present application; the withstand voltage test apparatus further includes: a high voltage reactor 400 and a voltage divider 500, the high voltage reactor 400 being configured in series with both the excitation transformer 200 and the cable 600 to be tested, the voltage divider 500 being configured in parallel with the cable 600 to be tested. The high-voltage reactor 400 is used for generating series resonance with the cable 600 to be tested; the voltage divider 500 is used to measure the high voltage value and the low voltage value of the cable 600 to be tested. The frequency modulation power output by the variable frequency power supply 100 is coupled to the series resonant circuit of the high voltage reactor 400 and the cable 600 to be tested through the exciting transformer 200 to provide exciting power, so as to realize withstand voltage test on the test cable.
In the embodiment of the present application, the side wall of the base plate 300 is provided with a plurality of connection lugs 301, and the plurality of connection lugs 301 are arranged at intervals along the circumferential direction of the base plate 300. After the pressure-resistant test equipment is transported to a test site by a test person through a truck, the test can be directly carried out on a vehicle; the device can also be hoisted according to the specific condition of the site, and a tester hoistes the device to the test site through the connecting lugs 301 arranged on the integral bottom plate 300 during hoisting.
The base plate 300 may be a rectangular base plate, four connecting lugs 301 are disposed on the base plate 300, two connecting lugs 301 are disposed on one side wall, the other two connecting lugs 301 are disposed on the other side wall, and the two side walls are opposite.
In the embodiment of the application, the pressure-resistant test equipment further comprises an outer shell, wherein the outer shell is fixedly connected to the top surface of the bottom plate 300, and the outer shell is welded to the top surface of the bottom plate 300; the variable frequency power supply 100 is disposed in an outer housing, which is capable of protecting the variable frequency power supply 100.
The preparation material of the outer shell is stainless steel, so that salt spray corrosion can be effectively prevented.
In the embodiment of the application, the first outer surface of the outer shell is provided with the control console 101 and the external power interface 102, the control console 101 is used for displaying various data in the test process, and a tester can also input various data required in the test by the control console, so that the diversified test is realized. The external power interface 102 is used to connect an external power source.
In the embodiment of the present application, the exciting transformer 200 is further provided with an unloaded switch 201, and the unloaded switch 201 is configured to automatically adjust the voltage of the exciting transformer 200. In the test process, the regulation of the exciting transformer 200 is changed from manual selection output of high voltage and low voltage to automatic regulation at the low voltage end through the no-load change-over switch 201, so that the problem of test failure caused by proper output proportion due to manual regulation is solved.
The exciting transformer 200 comprises a high-voltage output end and a low-voltage output end, wherein the high-voltage output end is arranged on a first side surface of the exciting transformer 200, and the low-voltage output end is arranged on a second side surface of the exciting transformer; the no-load switch 201 is disposed on the second side and connected to the low voltage output terminal.
Wherein, the no-load change-over switch 201 is connected with the low-voltage output end through a connecting copper sheet.
The exciting transformer 200 further comprises a low-voltage output sleeve and a high-voltage output sleeve 203, the first side surface is provided with a low-voltage output sleeve mounting port, and the high-voltage output sleeve 203 is connected with the high-voltage output sleeve mounting port through a first connecting bolt; the second side is provided with low pressure output sleeve pipe installing port, and low pressure output sleeve pipe passes through the second connecting bolt and is connected with low pressure output sleeve pipe installing port.
The exciting transformer 200 further comprises an input terminal 202, the second side surface being provided with an input terminal mounting opening, the input terminal 202 being provided at the input terminal mounting opening.
The exciting transformer top 204 of the exciting transformer 200 has a reinforcing rib 205 to ensure the stability of the overall structure.
In summary, the embodiment of the application provides a withstand voltage test apparatus, which includes a variable frequency power supply 100, an exciting transformer 200 and a base plate 300, wherein the variable frequency power supply 100 and the exciting transformer 200 are fixedly installed on the top surface of the base plate 300, the variable frequency power supply 100 is configured to be connected with an external power supply, the variable frequency power supply 100 is further electrically connected with the exciting transformer 200, and the exciting transformer 200 is configured to boost the voltage output by the variable frequency power supply 100 so as to perform a withstand voltage test on a cable to be tested. By fixing the variable frequency power supply 100 and the exciting transformer 200 on the same platform, the system is highly integrated, no additional assembly is needed, only the connection of an external power supply and the connection of a power supply wire are needed, and the rest is not needed to be wired.
In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Generally, terms should be understood at least in part by use in the context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, at least in part depending on the context. Similarly, terms such as "a" or "an" may also be understood to convey a singular usage or a plural usage, depending at least in part on the context.
It should be readily understood that the terms "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest sense such that "on … …" means not only "directly on something", but also includes "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning "on something" or "above" but also the meaning "above something" or "above" without intermediate features or layers therebetween (i.e., directly on something).
Further, spatially relative terms, such as "below," "beneath," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein interpreted accordingly.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. The voltage withstand test device is characterized by comprising a bottom plate, a variable frequency power supply, an excitation transformer, a high-voltage reactor and a voltage divider, wherein the variable frequency power supply and the excitation transformer are fixedly arranged on the top surface of the bottom plate, the variable frequency power supply is electrically connected with the excitation transformer, the variable frequency power supply is further configured to be connected with an external power supply, the high-voltage reactor is configured to be connected with the excitation transformer and a cable to be tested in series, the voltage divider is configured to be connected with the cable to be tested in parallel, and the excitation transformer is configured to regulate the voltage output by the variable frequency power supply so as to conduct voltage withstand test on the cable to be tested.
2. The withstand voltage test apparatus according to claim 1, wherein the high-voltage reactor and the voltage divider are fixedly mounted on a top surface of the base plate.
3. The pressure resistance test apparatus according to claim 1, wherein the side wall of the base plate is provided with a plurality of connection lugs arranged at intervals along the circumferential direction of the base plate.
4. The withstand voltage test apparatus according to claim 1, further comprising an outer housing fixedly connected to the top surface of the bottom plate, the variable frequency power supply being provided in the outer housing.
5. The pressure test apparatus of claim 4, wherein the outer housing is made of stainless steel.
6. The pressure test apparatus of claim 4, wherein the first outer surface of the outer housing is provided with a control console.
7. The withstand voltage test apparatus according to claim 1, wherein an off-load change-over switch is provided on the exciting transformer, the off-load change-over switch being configured to automatically adjust a voltage of the exciting transformer.
8. The withstand voltage test apparatus according to claim 7, wherein the exciting transformer includes a high voltage output terminal and a low voltage output terminal, the high voltage output terminal being provided at a first side of the exciting transformer, the low voltage output terminal being provided at a second side of the exciting transformer;
the no-load change-over switch is arranged on the second side face and is connected with the low-voltage output end.
9. The withstand voltage test apparatus according to claim 8, wherein the exciting transformer further comprises an input terminal, a low voltage output bushing and a high voltage output bushing, the first side being provided with a low voltage output bushing mounting port, the high voltage output bushing being connected to the high voltage output bushing mounting port by a first connecting bolt;
the second side surface is provided with an input terminal mounting opening, and the input terminal is arranged at the input terminal mounting opening;
the second side is provided with a low-voltage output sleeve mounting port, and the low-voltage output sleeve is connected with the low-voltage output sleeve mounting port through a second connecting bolt.
10. The withstand voltage test apparatus according to claim 8, wherein the no-load change-over switch is connected to the low voltage output terminal through a connection copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311058672.3A CN117092462A (en) | 2023-08-21 | 2023-08-21 | Pressure-resistant test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311058672.3A CN117092462A (en) | 2023-08-21 | 2023-08-21 | Pressure-resistant test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117092462A true CN117092462A (en) | 2023-11-21 |
Family
ID=88774783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311058672.3A Pending CN117092462A (en) | 2023-08-21 | 2023-08-21 | Pressure-resistant test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117092462A (en) |
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2023
- 2023-08-21 CN CN202311058672.3A patent/CN117092462A/en active Pending
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