CN211698050U - GIL equipment unit ultrahigh frequency signal attenuation amount test platform - Google Patents

Abstract

The utility model discloses a testing platform for the attenuation of ultra-high frequency signals of GIL equipment units, which comprises several morphological testing units, an ultra-high pulse signal generator and a partial discharge monitoring system; The L-shaped morphological test unit, the T-shaped morphological test unit, and the second straight-tube I-shaped morphological test unit; the morphological test unit includes a GIL unit, and the busbar casing in the GIL unit is provided with a built-in UHF partial discharge sensor; The UHF pulse signal generator is connected to the built-in UHF partial discharge sensor of the morphological test unit as required, and the partial discharge monitoring system records the output response of the built-in UHF partial discharge sensor of each morphological test unit and saves the map information. The device can obtain the attenuation of the UHF signal according to the test results, reasonably formulate the layout principle of the field sensor, and can effectively improve the early warning capability of the built-in UHF partial discharge sensor.

Description

GIL equipment unit UHF signal attenuation test platform

technical field

The utility model relates to the field of substation technology, in particular to a test platform for the attenuation of ultra-high frequency signals of GIL equipment units.

Background technique

GIL equipment has the advantages of large transmission capacity, small transmission loss, modular components, environmental friendliness, and suitability for complex terrain, etc. GIL equipment is widely used. Since the GIL equipment adopts an all-metal enclosed structure, the insulation state of the GIL equipment cannot be grasped by the external ultra/ultra-high frequency partial discharge detection method. The use of built-in UHF/UHF partial discharge detection method is an important means to judge the insulation state of GIL equipment on site. However, there is currently a lack of layout principles for built-in UHF/UHF partial discharge sensors in GIL equipment. It is impossible to grasp the attenuation of the UHF signal in the GIL equipment. At present, there is a problem that the sensor cannot detect the fault signal due to the unreasonable arrangement of the built-in sensors in the GIL equipment.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a test platform for the attenuation of UHF signals of GIL equipment units.

The utility model is realized by the following technical solutions: a test platform for the attenuation of ultra-high frequency signals of a GIL equipment unit, including several morphological test units, an ultra-high pulse signal generator and a partial discharge monitoring system; the morphological test unit includes a first Straight-tube I-shape test unit, L-shape test unit, T-shape test unit, and second straight-tube I-shape test unit; the first straight-tube I-shape test unit, L-shape test unit, and T-shape test unit Among the three morphological test units, each morphological test unit includes 3 GIL units, which are the first GIL unit, the second GIL unit and the third GIL unit connected in sequence; each GIL unit includes a busbar, a GIL conductive rod, Three-pillar insulators and contact seat accessories, the GIL conductive rod is located in the busbar, the three-pillar insulator is installed on the GIL conductive rod, one end of the GIL conductive rod is installed with a contact seat accessory, and the GIL conducts electricity The other end of the rod is installed on the adjacent contact seat fittings; the busbar shell in the first GIL unit is provided with a first built-in UHF partial discharge sensor and a second built-in UHF partial discharge sensor, the first built-in UHF partial discharge sensor is connected with the UHF pulse signal generator as a signal injection source; the busbar casing in the second GIL unit is provided with a third built-in UHF partial discharge sensor Discharge sensor; the busbar shell in the third GIL unit is provided with a fourth built-in UHF partial discharge sensor; the second straight-tube I-shaped test unit includes a busbar and a fifth built-in built-in sensor arranged in the busbar shell type UHF partial discharge sensor; the ultra-high pulse signal generator of this test platform is connected to the first built-in UHF partial discharge sensor or the fifth built-in UHF partial discharge sensor of the morphological test unit as needed. The discharge sensor records the output response of the built-in UHF partial discharge sensor of each morphological test unit through the partial discharge monitoring system and saves the map information.

In the first straight-tube I-type test unit, a basin-type insulator is provided between the second GIL unit and the third GIL unit through the flange of the busbar. The arrangement of this structure is convenient to carry out the measurement of the attenuation of the UHF signal passing through the basin insulator.

The L-shaped test unit further includes a corner unit, and the corner unit is provided with an L-shaped conductive rod and a contact seat fitting, and the corner unit is installed between the first GIL unit and the second GIL unit. ; One end of the L-shaped conductive rod is connected to the GIL conductive rod in the first GIL unit through the contact seat fitting, and the other end of the L-shaped conductive rod is connected to the second through the contact seat fitting. The GIL conductive rods in the GIL unit meet. The setting of this structure is convenient to carry out the measurement of the attenuation of the UHF signal passing through a corner unit.

The T-shaped test unit also includes a tee unit, and the tee unit is provided with a T-shaped conductive rod and a contact seat fitting, and the three ports of the tee unit are respectively connected with the first GIL unit, the The second GIL unit and the third GIL unit are connected; the three ends of the T-shaped conductive rod are respectively connected with the three GIL conductive rods through the contact seat fittings. The setting of this structure is convenient to carry out the measurement of the attenuation of the UHF signal through a three-pass unit.

The length of the second straight cylinder I-shaped form test unit is greater than 36m and less than 60m. The setting of this structure is convenient to carry out the measurement of the attenuation of the UHF signal passing through the GIL bus tube per unit length.

Compared with the prior art, the advantages of the present utility model are: the device can conveniently use the I-type, L-type and T-type test units, and the ultra-high frequency pulse signal generator is connected with a partial discharge sensor as the signal injection source, and the local The discharge monitoring system tests and records the output response of other partial discharge sensors. The test obtains the attenuation of the UHF signal passing through the three-pillar insulator, the basin insulator, the corner unit, the three-way unit, and the unit length, and the field is reasonably formulated according to the test results. The arrangement principle of the built-in partial discharge sensor can effectively improve the early warning capability of the built-in UHF partial discharge sensor, improve the alarm accuracy of the built-in partial discharge sensor, and accurately obtain the UHF signal attenuation of the typical unit of the GIL equipment.

Description of drawings

Fig. 1 is the structural representation of the first straight cylinder I-type form test unit according to the embodiment of the present utility model;

Fig. 2 is the structural representation of the L-shaped form test unit of the embodiment of the present utility model;

3 is a schematic structural diagram of a T-shaped form test unit according to an embodiment of the present utility model;

Fig. 4 is the structural representation of the second straight cylinder I-shaped form test unit according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of a partial structure of a GIL unit according to an embodiment of the present invention.

The meanings of the reference numbers in the figure: 1, the first GIL unit; 2, the second GIL unit; 3, the third GIL unit; 4, the busbar; 5, the GIL conductive rod; 6, the three-pillar insulator; 7, the first built-in 8. The second built-in UHF partial discharge sensor; 9. The third built-in UHF partial discharge sensor; 10. The fourth built-in UHF partial discharge sensor; 11. The third built-in UHF partial discharge sensor Five built-in UHF partial discharge sensors; 12, corner unit; 13, three-way unit.

Detailed ways

The content of the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Example

Referring to Figures 1 to 5, it is a test platform for UHF signal attenuation of a GIL equipment unit, including several morphological test units, an ultra-high pulse signal generator and a partial discharge monitoring system; the morphological test unit includes a first straight cylinder I-shaped Test unit, L-shape test unit, T-shape test unit, second straight-tube I-shape test unit; the first straight-tube I-shape test unit, L-shape test unit, and T-shape test unit among the three shape test units , each morphological test unit includes 3 GIL units, which are the first GIL unit 1, the second GIL unit 2 and the third GIL unit 3 connected in sequence; each GIL unit includes a busbar 4, a GIL conducting rod 5, three The pillar insulator 6 and the contact seat accessories, the GIL conductive rod 5 is located in the busbar 4, the three-pillar insulator 6 is installed on the GIL conductive rod 5, the contact seat accessories are installed at one end of the GIL conductive rod 5, and the other end of the GIL conductive rod 5 is installed. The ends are installed on the adjacent contact seat fittings; the casing of the busbar 4 in the first GIL unit 1 is provided with a first built-in UHF partial discharge sensor 7 and a second built-in UHF partial discharge sensor 8, The first built-in ultra-high frequency partial discharge sensor 7 is connected with the ultra-high pulse signal generator as a signal injection source; the casing of the busbar 4 in the second GIL unit 2 is provided with a third built-in ultra-high frequency partial discharge sensor 9; The outer casing of the busbar 4 in the three GIL units 3 is provided with a fourth built-in UHF partial discharge sensor 10; frequency partial discharge sensor 11; the ultra-high pulse signal generator of this test platform is connected to the first built-in ultra-high frequency partial discharge sensor 7 or the fifth built-in ultra-high frequency partial discharge sensor 11 of the morphological test unit as needed, and the The partial discharge monitoring system records the output response of the built-in UHF partial discharge sensor of each morphological test unit and saves the map information. Comparing the output responses of each sensor, the attenuation of the ultra-high pulse signal passing through a three-pillar insulator 6, a corner unit 12, a three-way unit 13, and a unit-length GIL bus tube is obtained.

In the first straight-tube I-type test unit, a basin-type insulator is provided between the second GIL unit 2 and the third GIL unit 3 through the flange of the bus bar 4 .

The L-shaped test unit also includes a corner unit 12. The corner unit 12 is provided with an L-shaped conductive rod and a contact seat fitting. The corner unit 12 is installed between the first GIL unit 1 and the second GIL unit 2; the L-shaped conductive rod One end is connected with the GIL conductive rod 5 in the first GIL unit 1 through the contact seat fitting, and the other end of the L-shaped conductive rod is connected with the GIL conductive rod 5 in the second GIL unit 2 through the contact seat fitting. The arrangement of this structure is convenient to carry out the measurement of the attenuation of the UHF signal passing through a corner unit 12 .

The T-shaped test unit also includes a tee unit 13. The tee unit 13 is provided with T-shaped conductive rods and contact seat accessories. The three ports of the tee unit 13 are respectively connected with the first GIL unit 1 and the second GIL unit 2. , the third GIL unit 3 is connected; the three ends of the T-shaped conductive rods are respectively connected with the three GIL conductive rods 5 through the contact seat fittings. The arrangement of this structure is convenient to carry out the measurement of the attenuation of the UHF signal passing through a three-way unit 13 .

The length of the second straight cylinder I-shaped form test unit is greater than 36m and less than 60m. The setting of this structure is convenient to carry out the measurement of the attenuation of the UHF signal passing through the GIL bus tube per unit length.

Based on the test method of the UHF signal attenuation test platform of the GIL equipment unit, the first straight cylinder I-shaped test unit, L-shaped test unit, and T-shaped test unit are tested, including the following steps:

Step 1. Complete the debugging of the partial discharge monitoring system, ensure the normal communication of the system, and filter out the interference and background signals that affect the test;

Step 2. First, test the first straight cylinder I-type test unit. When conducting the first straight cylinder I-type test, two connection situations should be considered to be tested separately. Case 1 is between the second GIL unit 2 and the third GIL unit 3. The flange of the busbar 4 is provided with a basin-type insulator, and the second case is that the second GIL unit 2 and the third GIL unit 3 are directly connected through the flange of the busbar 4;

Step 3: In the first built-in UHF partial discharge sensor 7, the second built-in UHF partial discharge sensor 8, the third built-in UHF partial discharge sensor 9, and the fourth built-in UHF partial discharge sensor Install the sensor of the first manufacturer as the comparison standard at 10 places, and connect the ultra-high pulse signal generator with the sensor at 7 of the first built-in ultra-high frequency partial discharge sensor;

Step 4. Turn on the ultra-high pulse signal generator, and perform pulse injection from the first built-in ultra-high frequency partial discharge sensor 7. The output voltages are 10V, 20V, 30V, 40V, 50V, 60V, 70V, 80V, 90V, 100V, the frequency is 50Hz, respectively record the output response values of the second built-in UHF partial discharge sensor 8, the third built-in UHF partial discharge sensor 9, and the fourth built-in UHF partial discharge sensor 10 under different voltages Ni, and save the map; after the test is completed, replace the sensor, replace the second built-in UHF partial discharge sensor 8, the third built-in UHF partial discharge sensor 9, and the fourth built-in UHF partial discharge sensor 10 Replace the sensor of the second manufacturer as the comparison standard. The first built-in UHF partial discharge sensor 7 is not replaced, and step 4 is repeated until all sensors of the manufacturer are tested, and then go to step 5; wherein, i is the test Sensor labels, the second built-in ultra-high frequency partial discharge sensor 8 is marked as N2, the third built-in ultra-high frequency partial discharge sensor 9 is marked as N3, and the fourth built-in ultra-high frequency partial discharge sensor 10 is marked as N4;

Step 5: Change the test state, and perform the operation of step 4 in the L-shape test unit and the T-shape test unit respectively. If all the test states are completed, go to step 6;

Step 6. Complete the morphological test unit test and cut off the power supply of the equipment;

Step 7. Compare the output response values of the second built-in UHF partial discharge sensor 8 and the third built-in UHF partial discharge sensor 9, or compare the second built-in UHF partial discharge sensor 8 with the fourth built-in UHF partial discharge sensor 8 The output response value of the UHF partial discharge sensor 10 is obtained, and the attenuation of the UHF pulse signal passing through a three-pillar insulator 6, a corner unit 12, and a three-way unit 13 is obtained. In this state, the output response value of the fourth built-in UHF partial discharge sensor 10 can obtain the attenuation of a basin-type insulator.

Based on the test method of the UHF signal attenuation test platform of the GIL equipment unit, the test is carried out for the first straight cylinder I-shaped test unit and the second straight cylinder I-shaped form test unit, including the following steps:

Step 1. Complete the debugging of the partial discharge monitoring system, ensure the normal communication of the system, and filter out the interference signals affecting the test;

Step 2, connecting the first straight cylinder I-type form test unit and the second straight cylinder I-type form test unit to the test platform;

Step 3, turn on the ultra-high pulse signal generator, and perform pulse injection from the first built-in ultra-high frequency partial discharge sensor 7, and the output voltages are 10V, 20V, 30V, 40V, 50V, 60V, 70V, 80V, 90V, 100V, the frequency is 50Hz, respectively record the output response value N4 of the fourth built-in UHF partial discharge sensor 10 and the output response value N5 of the fifth built-in UHF partial discharge sensor 11 under different voltages, and save the map;

Step 4. Complete the morphological test unit test and cut off the power supply of the equipment;

Step 5. Compare the output response value of the fourth built-in UHF partial discharge sensor 10 with the output response value of the fifth built-in UHF partial discharge sensor 11 to obtain the attenuation of the ultra-high pulse signal passing through the unit-length GIL busbar 4 quantity.

In this embodiment, the contact seat fittings, the basin-type insulator, the ultra-high pulse signal generator and the partial discharge monitoring system are all conventional fittings in the art, and therefore will not be described further.

The above detailed description is a specific description for the feasible embodiments of the present invention, and the embodiments are not intended to limit the scope of the patent of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in this case. within the scope of the patent.

Claims (5)

1. The UHF signal attenuation test platform of GIL equipment unit is characterized in that: comprise some form test units, ultra-high pulse signal generator and partial discharge monitoring system; Described form test unit comprises the first straight cylinder I-type form test unit , L-shaped form test unit, T-shaped form test unit, and second straight cylinder I-shaped form test unit; among the three form test units of the first straight-cylinder I-shaped form test unit, L-shaped form test unit, and T-shaped form test unit , each morphological test unit includes 3 GIL units, which are the first GIL unit, the second GIL unit and the third GIL unit connected in sequence; each GIL unit includes a busbar, a GIL conducting rod, a three-pillar insulator and a contact seat accessories, the GIL conductive rod is located in the busbar, the three-pillar insulator is installed on the GIL conductive rod, one end of the GIL conductive rod is installed with a contact seat fitting, and the end of the other end of the GIL conductive rod Installed on the adjacent contact seat fittings; the busbar shell in the first GIL unit is provided with a first built-in UHF partial discharge sensor and a second built-in UHF partial discharge sensor, the first built-in UHF partial discharge sensor. The built-in ultra-high frequency partial discharge sensor is connected with the ultra-high pulse signal generator as a signal injection source; the busbar casing in the second GIL unit is provided with a third built-in ultra-high frequency partial discharge sensor; the first The busbar shell in the three GIL units is provided with a fourth built-in UHF partial discharge sensor; the second straight-tube I-shaped test unit includes a busbar and a fifth built-in UHF partial discharge arranged on the busbar shell. sensor; the ultra-high pulse signal generator of this test platform is connected to the first built-in ultra-high frequency partial discharge sensor or the fifth built-in ultra-high frequency partial discharge sensor of the morphological test unit as needed. The partial discharge monitoring system records the output response of the built-in UHF partial discharge sensor of each morphological test unit and saves the map information. 2. The UHF signal attenuation test platform for GIL equipment units according to claim 1, wherein: in the first straight cylinder I-shaped test unit, the second GIL unit and the third GIL unit A basin-type insulator is arranged between the flanges passing through the busbar barrel. 3. GIL equipment unit UHF signal attenuation test platform according to claim 1, is characterized in that: described L-shaped form test unit also comprises corner unit, and described corner unit is provided with L-shaped conductive rod and contactor inside. A head seat fitting, the corner unit is installed between the first GIL unit and the second GIL unit; one end of the L-shaped conductive rod passes through the contact seat fitting and the GIL in the first GIL unit The conductive rods are connected, and the other end of the L-shaped conductive rod is connected with the GIL conductive rod in the second GIL unit through the contact seat fitting. 4. GIL equipment unit UHF signal attenuation test platform according to claim 1, is characterized in that: described T-shaped form test unit also comprises three-way unit, and described three-way unit is provided with T-shaped conductive rod inside and contact seat accessories, the three ports of the three-way unit are respectively connected with the first GIL unit, the second GIL unit, and the third GIL unit; the three ends of the T-shaped conductive rod are respectively connected to The contact seat fittings are connected with three GIL conductive rods. 5 . The UHF signal attenuation test platform for GIL equipment units according to claim 1 , wherein the length of the second straight-tube I-shaped test unit is greater than 36m and less than 60m. 6 .

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