TWI795171B - Testing system for doing a cable test - Google Patents

Abstract

The invention discloses a testing system for doing a cable test, which includes a first reactor, a second reactor and a supporting device. The second reactor is coupled to the first reactor in series. The second reactor includes a reactor body and a corona ring, and a lower edge of the corona ring and a bottom surface of the reactor body are defined as a safety distance, wherein when the supporting device supports the bottom surface of the reactor body, a distance between the lower edge of the corona ring and a ground is greater than the safety distance.

Description

A test system suitable for testing a cable

The present invention relates to a test system, especially a test system that utilizes a supporting device to make the distance between the corona ring and the ground conform to the specification of a unit safety distance to test voltage specification.

Generally speaking, the high-voltage cable leads to corona phenomenon due to the high electric field intensity; corona is a partial discharge phenomenon caused by instantaneous ionization of gas in the insulation system when the voltage stress exceeds a certain critical value.

In order to ensure the safety of the surrounding environment when testing cables, it is usually necessary to set up a corona ring to prevent the corona phenomenon, and the distance between the corona ring and the ground must be based on the specification of the test voltage specification to be effective and ensure the avoidance of current introduction ground to maintain the safety of testers.

In response to different test fields, the test voltage specification usually specifies several different test conditions, and when the test voltage in the test conditions specified in the test voltage specification is larger, the test voltage specification will also correspond to the specification of the corona ring. Keep a large distance from the ground. However, general cable testing equipment is usually bulky and difficult to move. Therefore, how to ensure the distance between the corona ring and the ground when testing cables, so as to meet the specifications in the test voltage specification book, has become an important issue in the industry.

The invention provides a testing system suitable for testing a cable, which uses a supporting device to make the distance between the corona ring and the ground comply with the specification of a testing voltage specification.

According to an embodiment, the present invention discloses a test system suitable for testing a cable, comprising: a first reactor, a second reactor and a supporting device; the second reactor is connected in series with the first reactor Coupling, the second reactor includes a reactor body and a corona ring, the reactor body has a bottom surface, and the corona ring is arranged on the reactor body and used to couple the cable, the corona ring The lower edge of the reactor body defines a single safety distance from the bottom surface of the reactor body; the support device directly or indirectly contacts the bottom surface of the reactor body to support the reactor body of the second reactor on above a ground; wherein, when the support device directly or indirectly contacts and supports the bottom surface of the reactor body, the distance between the lower edge of the corona ring and the ground is greater than the safety distance of the single unit.

According to an embodiment, the present invention discloses a test system suitable for testing a cable, comprising: a first reactor and a second reactor; the first reactor is arranged on a ground; the second reactor is connected in series Coupled with the first reactor, the second reactor includes a reactor body and a corona ring, the reactor body is directly or indirectly stacked on the first reactor, and the corona The ring is arranged on the reactor body and is used to couple the cable, and the lower edge of the corona ring defines a single safety distance from a bottom surface of the reactor body; wherein, when the reactor body directly or indirectly When stacked on the first reactor, the distance between the lower edge of the corona ring and the ground is greater than the safety distance of the single unit.

According to an embodiment, a test system suitable for testing a cable is disclosed, including: a first reactor and a second reactor, the first reactor includes a first reactor body and a first corona ring, The second reactor is coupled with the first reactor in parallel and includes a second reactor body and a second corona ring; the first corona ring is arranged on the first reactor body, and The second corona ring is disposed on the second reactor body and used for coupling the cable, and the minimum distance between the first corona ring and the second corona ring is not less than a specific value.

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the drawings.

2000: cable

1000: test system

1: The first reactor

10: The first reactor body

11: First corona ring

2: The second reactor

20: The second reactor body

21: Second corona ring

3: Support device

31: Fixed base

311: Taiwan body

312: support column

32: Lifting support device

32': mobile support device

321:Fixer

322: Movable parts

323: transfer parts

324: actuation unit

51: The first equalizing ring

52: The second equalizing ring

53: Impedance piece

54: The first support

55: Second support

60: Electronic control unit

61:Transformer

70: Power supply equipment

80: front

81: The first loading trolley

82: The second loading trolley

F: Ground

S1: Single safety distance

S2: predetermined distance

FIG. 1 is a schematic diagram of a first embodiment of a test system suitable for testing a cable according to the present invention.

Fig. 2 is a partially enlarged schematic diagram of part A of Fig. 1 of the present invention.

Figure 3 is a curve diagram of test voltage and safety distance.

Fig. 4 is a schematic diagram of the second embodiment of the present invention.

Fig. 5 is a schematic diagram of the third embodiment of the present invention.

Fig. 6 is a schematic diagram of the fourth embodiment of the present invention.

Fig. 7 is a schematic diagram of a fifth embodiment of the present invention.

Fig. 8 is a schematic diagram of the sixth embodiment of the present invention.

Fig. 9 is a schematic diagram of the seventh embodiment of the present invention.

Fig. 10 is a schematic diagram of the eighth embodiment of the present invention.

In order to enable those skilled in the art to further understand the present invention, the preferred embodiments of the present invention are listed below, and the composition and desired effects of the present invention are described in detail with reference to the accompanying drawings. It should be noted that the accompanying drawings are all simplified schematic diagrams, therefore, only the components and combinations related to the present invention are shown to provide a clearer description of the basic structure or implementation method of the present invention, while the actual components and layout may be more accurate. for complex. In addition, for the convenience of description, the components shown in the drawings of the present invention are not drawn in proportion to the number, shape, and size of the actual implementation, and the detailed proportions can be adjusted according to design requirements.

The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.

Although the terms first, second, third... can be used to describe various components, the components are not limited to this term. This term is only used to distinguish a single element from other elements in a specification. The same terms may not be used in the claims, but replaced by first, second, third... in the order of component declarations in the claims. Therefore, in the following description, a first element may be a second element in a claim.

Please refer to Figs. 1 and 2, Fig. 1 is a schematic view of the first embodiment of the test system suitable for testing a cable according to the present invention, and Fig. 2 is a partially enlarged schematic view of part A of Fig. 1 of the present invention. The testing system 1000 is used for testing a cable 2000 and includes a first reactor 1 and a second reactor 2 . The first reactor 1 includes a first reactor body 10 and a first corona ring 11 disposed on the first reactor body 10 . The second reactor 2 is coupled with the first reactor 1 in series, and the second reactor 2 includes a second reactor body 20 and a second corona ring 21 disposed on the second reactor body 20 . In this embodiment, the first corona ring 11 is used to couple the second reactor body 20, so that the second reactor body 20 of the second reactor 2 is coupled to the first reactor body 20 of the first reactor 1 in series. A reactor body 10 . The second corona ring 21 is disposed on the second reactor body 20 and used for coupling the cable 2000 .

In practice, the cable 2000 includes a gas insulated switchgear (GIS), which mainly includes a busbar, a circuit breaker, a combination of CT (current transformer), PT, isolating switch, and lightning arrester, etc., to protect the cable 2000 Test, and the gas-insulated combined electrical equipment is known to those with ordinary knowledge in this field. For the sake of brevity, the structural configuration of the gas-insulated combined electrical equipment will not be repeated here.

The second reactor body 20 has a bottom surface, and the lower edge of the second corona ring 21 and the bottom surface of the second reactor body 20 define a single safety distance S1. In practice, when the present invention When the test system 1000 tests the cable 2000, in order to avoid the current generated by the conduction between the lower edge of the second corona ring 21 and the ground to cause harm to the test personnel, when the cable 2000 is tested, the second corona ring 21 The distance between the lower edge and the ground needs to be regulated by a test voltage specification. The basic principle is: when the test voltage used by the test system 1000 to test the cable 2000 is higher, the lower edge of the second corona ring 21 The greater the distance from the ground.

In practice, since the size of the second reactor body 20 is fixed, the single safety distance S1 defined by the lower edge of the second corona ring 21 and the bottom surface of the second reactor body 20 is a certain value. Therefore, when the test voltage of the cable 2000 tested by the test system 1000 of the present invention is greater than the test voltage corresponding to the single safety distance S1 of the second reactor body 20, it is necessary to adjust the height of the second reactor body 20 relative to a ground F , so that the distance between the lower edge of the second corona ring 21 and the ground can meet the specification of the test voltage specification.

Therefore, the test system 1000 of the present invention includes a supporting device 3, which is arranged on a ground F, and can directly or indirectly contact and abut against the bottom surface of the second reactor body 20, so as to place the second reactance The second reactor body 20 of the reactor 2 is supported on the ground F. Wherein, when the support device 3 directly or indirectly contacts and supports the bottom surface of the second reactor body 20, the second reactor body 20 is supported by the support device 3 from the ground F, so that the lower surface of the second corona ring 21 There is a predetermined distance S2 between the edge and the ground F (the predetermined distance S2 is also called distance), and the predetermined distance S2 is greater than the safety distance S1 of the single body.

In practice, the first reactor 1 is connected to an electronic control unit 60, the electronic control unit 60 is used to set the relevant parameters of the cable test, and is connected to a power supply device 70 (such as a transformer box), and the first reactor 1 A transformer 61 is provided between the electric control unit 60 and the electric control unit 60 . The second corona ring 21 is connected with a first equalizing ring 51, and the cable 2000 is connected with a second equalizing ring 52 (the first equalizing ring 51 and the second equalizing ring 52 can evenly distribute high-voltage electricity around, so as to achieve the effect of pressure equalization), and there is an impedance 53 between the first pressure equalization ring 51 and the second pressure equalization ring 52, and the first pressure equalization ring 51 and the second pressure equalizing ring 52 are respectively supported by a first support 54 and a second support 55 on the ground F.

In this embodiment, the first reactor 1, the electronic control unit 60 and the transformer 61 are arranged on a first carrying trolley 81, and the first carrying trolley 81 is connected to a vehicle head 80, so as to carry the first reactor 1 Move to desired location. In practice, the first loading trolley 81 can be a trailer, and the front 80 can be a front for towing the trailer, but the first loading trolley 81 and the front 80 of the present invention are not limited thereto.

In more detail, due to the high electric field intensity of high-voltage cables, corona rings are usually required to avoid corona phenomena in the surrounding environment, and the distance between the corona rings and the ground must be kept in compliance with regulations to ensure the safety of the cable testing process. Therefore, in this embodiment, the support device 3 is designed as a fixed base, including a base 311 and a support column 312, the base 311 is used to contact the bottom surface of the second reactor body 20, so that the second reactor 2 The support columns 312 are connected to the platform body 311 and used to contact the ground F, so as to support the platform body 311 above the ground F. In this way, using the single safety distance S1 between the lower edge of the second corona ring 21 and the bottom surface of the second reactor body 20, and matching the height of the supporting device 3, the lower edge of the second corona ring 21 and the ground F At this time, the predetermined distance S2 formed between the lower edge of the second corona ring 21 and the ground F will be equal to the single safety distance between the lower edge of the second corona ring 21 and the bottom surface of the second reactor body 20 The sum of the distance S1 and the height of the supporting device 3 .

It is worth mentioning that, in this embodiment, since the first reactor 1 is coupled to the second reactor 2 in series, and the specification of the first reactor 1 is the same as that of the second reactor 2, the second reactor 1 The voltage at the end of the second corona ring 21 of the second reactor 2 is twice that of the second reactor 2 or the first reactor 1 . Therefore, the predetermined distance S2 is equal to twice the safety distance S1 of the monomer, and the safety distance S1 of the monomer of the present invention is subject to the test voltage and safety distance regulations established by the International Electrotechnical Commission (International Electrotechnical Commission, IEC), and The present invention does not Subject to this limitation, it can also be subject to the test voltage and safety distance regulations formulated by various countries or other organizations. Please refer to Figure 3 for the regulations on the safety distance of the reactor in the voltage test of the present invention. Figure 3 is a curve diagram of the test voltage and the safety distance. In this embodiment, the curve shown in Figure 3 conforms to the international The specifications of the test voltage and safety distance established by the Electrotechnical Commission standard are shown in Figure 3. Taking the test voltage of 26kV as an example, the safety distance is about 2 meters, but the present invention is not limited thereto.

Please refer to FIG. 4, which is a schematic diagram of the second embodiment of the present invention. The support device 3 is a lifting support device (for example: hydraulic cylinder, pneumatic cylinder or jack), including a fixed part 321 and a movable part 322, the fixed part 321 is used to be fixed on the ground F, and the movable part 322 can be opposite The fixed part is telescopically arranged on the fixed part 321 , and one end of the movable part 322 is used to drive the reactor body 20 of the second reactor 2 to move up and down. Thereby, the distance between the lower edge of the second corona ring 21 and the ground F can be adjusted by using the movable part 322 to drive the second reactor body 20 to move up or down, so that the lower edge of the second corona ring 21 is in line with the ground F. The distance from the ground F can meet the specifications of the test voltage and safety distance.

Please refer to FIG. 5, which is a schematic diagram of the third embodiment of the present invention. The support device 3 further includes a fixed base 31 and a second carrying trolley 82, the fixed base 31 includes a platform 311 and a support column 312; the platform 311 is used to contact the bottom surface of the second reactor body 20, support The column 312 is connected to the platform body 311 , and the second carrying trolley 82 is disposed on the ground F, and the support column 312 for fixing the base 31 is disposed on the second carrying trolley 82 . The difference from the first embodiment is that the first reactor 1 and the second reactor 2 of this embodiment are respectively installed on the first carrying trolley 81 and the second carrying trolley 82, and are connected by the second corona ring 21. The single safety distance S1 between the edge and the bottom surface of the second reactor body 20, combined with the height of the supporting device 3 and the second carrying trolley 82, makes the distance between the lower edge of the second corona ring 21 and the ground F meet the test Voltage and safety distance specifications.

Please refer to FIG. 6, which is a schematic diagram of a fourth embodiment of the present invention. The supporting device 3 includes a second carrying trolley 82 and a lifting support device 32, and the lifting supporting device 32 (for example: oil pressure cylinder, pneumatic cylinder or jack) includes a fixed part 321 and a movable part 322; the second carrying trolley 82 is used To carry the reactor body 20 of the second reactor 2 , the movable part 322 is arranged on the fixed part 321 in a manner that can expand and contract relative to the fixed part, and one end of the movable part 322 is used to drive the second carrying trolley 82 to move up and down. Thereby, the distance between the lower edge of the second corona ring 21 and the ground F can be adjusted by using the movable part 322 to drive the second carrying trolley 82 to move up or down, so that the lower edge of the second corona ring 21 is closer to the ground. The distance between F can meet the specifications of test voltage and safety distance.

Please refer to FIG. 7, which is a schematic diagram of a fifth embodiment of the present invention. The support device 3 includes a lifting support device 32 and a second carrying trolley 82 whose top can be retracted horizontally. The lifting support device 32 (for example: hydraulic cylinder, pneumatic cylinder or jack) includes a fixed part 321 and a movable part 322; The part 322 is arranged on the fixed part 321 in a telescopic manner relative to the fixed part, and one end of the movable part 322 is used to drive the second reactor body 20 of the second reactor 2 to move up and down, and the second carrying trolley 82 is arranged on the ground F, and the fixing member 321 of the lifting support device 32 is disposed on the second carrying trolley 82 . Thereby, the movable part 322 drives the second reactor body 20 to move up or down, so that the distance between the second corona ring 21 and the second carrying trolley 82 can be adjusted; and when the movable part 322 drives the second reactor body 20 When moving upwards, the second reactor body 20 can be extended out of the second carrying trolley 82 through the horizontal contraction of the top of the second carrying trolley 82 . In this way, the distance between the lower edge of the second corona ring 21 and the ground F can be adjusted so that the distance between the lower edge of the second corona ring 21 and the ground F can meet the specifications of the test voltage and the safety distance.

Please refer to FIG. 8, which is a schematic diagram of the sixth embodiment of the present invention. The supporting device 3 comprises a second carrying trolley 82 and a mobile supporting device 32', the mobile supporting device 32' comprises a transfer unit 323 and an actuating unit 324; the second carrying trolley 82 is arranged on the ground F, and the transferring unit 323 It is arranged on the second carrying trolley 82 to contact the bottom surface of the second reactor body 20, and the actuating unit 324 is used to drive The transfer member 323 moves horizontally on the second carrying trolley 82 , and then drives the second corona ring 21 of the second reactor 2 to move horizontally into or out of the second carrying trolley 82 . When the cable test needs to be performed, the second corona ring 21 is driven out of the second carrying trolley 82 by the transfer member 323, so that a predetermined distance S2 can be formed between the second corona ring 21 and the ground F. The predetermined distance S2 formed between the lower edge of the corona ring 21 and the ground F will be equal to the single safety distance S1 between the lower edge of the second corona ring 21 and the bottom surface of the second reactor body 20 and the second carrying trolley of the supporting device 3 The sum of the heights of 82.

Please refer to FIG. 9, which is a schematic diagram of a seventh embodiment of the present invention. The difference from the first embodiment is that the testing system 1000 only includes the first reactor 1 and the second reactor 2 , without the supporting device 3 . In terms of design, when the second reactor body 20 is directly or indirectly stacked on the first reactor 1, a predetermined distance S2 is formed between the lower edge of the second corona ring 21 and the ground F, and the predetermined distance S2 is greater than the single safety distance S1. In this embodiment, the predetermined distance S2 is equal to the sum of the single safety distance S1 and the height of the first reactor 1 , and complies with a test voltage and safety distance specification.

Please refer to FIG. 10, which is a schematic diagram of the eighth embodiment of the present invention. The testing system 1000 includes a first reactor 1 and a second reactor 2 , and the first reactor 1 and the second reactor 2 are respectively arranged on a first loading trolley 81 and a second loading trolley 82 . In this embodiment, the second reactor 2 is coupled with the first reactor 1 in parallel, and the minimum distance between the first corona ring 11 and the second corona ring 21 still needs to meet the test voltage and safety distance specification. In this embodiment, the minimum distance between the first corona ring 11 and the second corona ring 21 is not less than a certain value, preferably for example: 100 cm.

As can be seen from the above description, the present invention makes the gap between the second corona ring 21 and the ground F (or the first loading trolley 81, the second loading trolley 82) be improved through the various installation positions and structural changes of the second reactor 2 or the support device 3 . A fixed or adjustable distance is formed, and it complies with the specifications of the test voltage and the safety distance, so that the present invention achieves safety when testing cables.

The above description is only a preferred embodiment of the present invention, and all equivalent structural changes made by applying the description of the present invention and the scope of the patent application should be included in the scope of the patent of the present invention.

2: The second reactor

20: The second reactor body

21: Second corona ring

3: Support device

311: table body

312: support column

51: The first equalizing ring

53: Impedance piece

54: The first support

F: ground

S1: Single safety distance

S2: predetermined distance

Claims (14)

A test system suitable for testing a cable, comprising: a first reactor; a second reactor coupled to the first reactor in series, the second reactor comprising: a reactor body having a bottom surface; and a corona ring arranged on the reactor body and used for coupling the cable, the lower edge of the corona ring and the bottom surface of the reactor body define a single safety distance; and a supporting device, directly or indirectly contacting the bottom surface of the reactor body to support the reactor body of the second reactor on a ground; wherein, when the supporting device directly or indirectly contacts and supports the When the bottom surface of the reactor body is used, the distance between the lower edge of the corona ring and the ground is greater than the safety distance of the single unit. The test system as claimed in item 1, wherein when the support device directly or indirectly contacts and supports the bottom surface of the reactor body, the distance between the lower edge of the corona ring and the ground is equal to the single twice the body safety distance. The test system according to claim 1, wherein when the support device directly or indirectly contacts and supports the bottom surface of the reactor body, the distance between the lower edge of the corona ring and the ground conforms to the single Body safety distance to the specification of the test voltage specification. The test system as claimed in item 1, wherein the support device is a fixed base, comprising: a body, used to contact the bottom surface of the reactor body; and A support column is connected to the platform and used for contacting the ground, so as to support the platform above the ground. The test system as described in claim 1, wherein the support device further includes: a fixed base, including: a body, used to contact the bottom surface of the reactor body; and a support column, connected to the body ; and a carrying trolley, which is set on the ground, and the support column of the fixed base is set on the carrying trolley. The test system as described in claim 1, wherein the support device is a lifting support device, comprising: a fixed part, which is used to be fixed on the ground; and a movable part, which is arranged on the On the fixed part, one end of the movable part is used to drive the reactor body of the second reactor to move up and down. The test system as described in claim 1, wherein the support device includes: a lifting support device, including: a fixed part; and a movable part, which is arranged on the fixed part in a telescopic manner relative to the fixed part. One end of the part is used to drive the reactor body of the second reactor to move up and down; and a carrying trolley is set on the ground, and the fixing part of the lifting support device is set on the carrying trolley. The test system as described in claim 1, wherein the support device includes: a carrying trolley, arranged on the ground, A mobile supporting device, comprising: a transfer part, arranged on the carrying trolley, for contacting the bottom surface of the reactor body; and an actuating unit, used to drive the transfer part to move horizontally on the carrying trolley . The test system according to claim 1, wherein the support device includes: a carrying trolley for carrying the reactor body of the second reactor; and a lifting support device, including: a fixed part; and a movable part is arranged on the fixed part in a telescopic manner relative to the fixed part, and one end of the movable part is used to drive the carrying trolley to move up and down. A test system suitable for testing a cable, comprising: a first reactor disposed on a ground; a second reactor coupled in series with the first reactor, the second reactor comprising: A reactor body is stacked directly or indirectly on the first reactor; a corona ring is arranged on the reactor body and used to couple the cable, and the lower edge of the corona ring is connected to the reactor A bottom surface of the reactor body defines a single safety distance; wherein, when the reactor body is directly or indirectly stacked on the first reactor, the distance between the lower edge of the corona ring and the ground greater than the monomer safety distance. The test system as claimed in claim 10, wherein when the reactor body is stacked directly or indirectly on the first reactor, the distance between the lower edge of the corona ring and the ground is equal to that of the unit twice the body safety distance. The test system as claimed in claim 10, wherein when the reactor body is directly or indirectly stacked on the first reactor, the distance between the lower edge of the corona ring and the ground conforms to the single Body safety distance to the specification of the test voltage specification. A test system suitable for testing a cable, comprising: a first reactor, including: a first reactor body; and a first corona ring, arranged on the first reactor body; and a second reactor A reactor, coupled with the first reactor in parallel, the second reactor includes: a second reactor body; and a second corona ring, arranged on the second reactor body and used for coupling In the cable, the minimum distance between the first corona ring and the second corona ring is not less than a specific value. The test system as described in claim 13, wherein the specific value is 100 centimeters.

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