CN202837525U - Entity GIS evaluation test platform of partial discharge ultra-high frequency detection device - Google Patents

Entity GIS evaluation test platform of partial discharge ultra-high frequency detection device Download PDF

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Publication number
CN202837525U
CN202837525U CN 201220457050 CN201220457050U CN202837525U CN 202837525 U CN202837525 U CN 202837525U CN 201220457050 CN201220457050 CN 201220457050 CN 201220457050 U CN201220457050 U CN 201220457050U CN 202837525 U CN202837525 U CN 202837525U
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China
Prior art keywords
gis
phase
cover plate
cavity
experimental cabin
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Withdrawn - After Issue
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CN 201220457050
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Chinese (zh)
Inventor
卢启付
李兴旺
唐志国
许鹤林
吕鸿
姚森敬
彭向阳
王宇
王流火
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North China Electric Power University
Electric Power Research Institute of Guangdong Power Grid Co Ltd
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North China Electric Power University
Electric Power Research Institute of Guangdong Power Grid Co Ltd
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Priority to CN 201220457050 priority Critical patent/CN202837525U/en
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Abstract

The utility model provides an entity GIS evaluation test platform of partial discharge ultra-high frequency detection device which comprises a GIS three-phase cavity. A number of cover plates with probes are added on the cavity. A monopole antenna which is made of a copper probe runs through the center of a cover plate and is used as a transmitting antenna. The tail is taken out through an N type head and is used for injecting an analogue partial discharge signal into the GIS three-phase cavity. At least one test chamber is added at the position which is provided with a flange, in an existing hand hole or in a special opening on the GIS cavity. A center dielectric window is arranged in the middle of a hand hole cover plate, and the dielectric window is made of an insulating dielectric plate material. All basin-type insulators of A phase are not provided with shielding ring and are fully open. Basin-type insulators of C phase are provided with shielding rings, and holes of various sizes are arranged on the shielding rings. According to the utility model, the performance evaluation of the partial discharge ultra-high frequency detection system and the reasonableness determination of a sensor configuration scheme are realized.

Description

A kind of entity GIS evaluation test platform of partial-discharge ultrahigh-frequency pick-up unit
Technical field
The utility model relates to a kind of test platform that partial-discharge ultrahigh-frequency (UHF) pick-up unit is estimated that utilizes that entity GIS (gas-insulated metal enclosed switchgear) makes up.
Background technology
In recent years, the application of GIS in electrical network is increasingly extensive, takes on a certain scale.And the detection method and the device that detect the GIS inherent vice are also given birth to because of fortune thereupon, superfrequency method (English be called for short UHF) is one of widely used detection means wherein, its measurement bandwidth is generally between 300MHz~1500MHz, have the characteristics such as antijamming capability is strong, sensitivity is high, and this contactless metering system is all safer for secondary device and testing staff, system architecture is simple, be particularly suitable for on-line monitoring, thereby compare to other detection method and have obvious advantage.A large amount of GIS inherent vice cases have been found by superfrequency on-line monitoring and live testing in all parts of the country in recent years, and the superfrequency method becomes the most important detection means of the online detection field of present GIS.
Summing up in recent years, national grid and south electric network GIS office are placed on line monitoring system operating experience, find the critical bottleneck problem applied of the partial-discharge ultrahigh-frequency technology that affects aspect detection GIS inherent vice of current existence, mainly contain the test evaluation standardization of detection system, consider the sensor allocation plan of GIS in the cost performance situation etc.
The utility model content
Technical problem to be solved in the utility model just provides the GIS evaluation test platform that a kind of performance evaluation to the partial-discharge ultrahigh-frequency detection system and sensor allocation plan rationality are determined.
Solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of entity GIS evaluation test platform of partial-discharge ultrahigh-frequency pick-up unit, comprise GIS three-phase cavity, it is characterized in that: have additional the cover plate that at least one is equipped with probe at described GIS three-phase cavity, its size is identical with the upper hand hole flange of GIS three-phase cavity, the unipole antenna of a copper probe manufacturing has been run through as emitting antenna in the cover plate center, afterbody is picked out by the N-type head, is used for injecting to GIS three-phase cavity the Partial discharge signal of simulation; In described GIS three-phase cavity, set up at least one experimental cabin, the position of experimental cabin is that flange or existing hand hole place or special tapping are arranged on the GIS cavity; Open the central medium window in the middle of the hand hole cover plate on described GIS three-phase cavity, medium window is insulation dielectric sheet material matter, and this can be used for later stage installation partial-discharge ultrahigh-frequency sensor to receive the local discharge signal of GIS inside; All disc insulators of A phase all do not have shading ring (shading ring is exactly a circle becket) on the described GIS three-phase cavity, are full open type, and the disc insulator of C phase has shading ring, has the hole of different sizes on the shading ring; Every phase has built-in sensors, is placed on the inlet wire air chamber of isolating switch air chamber, bus and three-phase, and the cover plate size of sensor is consistent with the experimental cabin cover plate.
The experimental cabin of setting up in A, B, C three-phase inlet wire side and A, C phase entrance bushing position, each increases by a hand hole, changes the flange that is mounted with probe.
A, B, C three-phase all are provided with experimental cabin, and A has 5 experimental cabins mutually, have two on the bus, and experimental cabin inside is used for placing Typical PD Models, and its cover plate replaces with cover plate and medium window formula that built-in sensors is housed and detects cover plate.Existing No. 1 experimental cabin perforate is displaced downwardly to corresponding with conductor position in the isolating switch, avoids radome and arc-chutes; No. 5 experimental cabin position of opening over against the conductor door with the lightning arrester joint radome that staggers.
Below be the proper noun that platform in use relates to, the spy gives an explaination:
Typical PD Models: the GIS typical insulation defect that causes shelf depreciation that is in operation mainly contains free metal particulate, metal protuberance thing, insulator air gap, insulator surface metal pollutant, suspension electrode etc., and Typical PD Models is that the above insulation defect of simulation produces shelf depreciation and the corresponding model of special making during for applied voltage test in the GIS cavity.
The simulation discharge source: the discharge that the GIS applied voltage test produces is comparatively complicated, for the ease of in the not test of pressurized environment, has designed the signal source of simulation local discharge signal, and the rising edge of the steep-sided pulse signal of generation can reach<300ps, and amplitude and pulsewidth are all adjustable.
Beneficial effect: for the fixed superfrequency on-line monitoring system of GIS inherent vice, because the concrete size of GIS, structure is (such as the L-type of GIS pipeline, T-shaped and radian is turned, isolating switch and CT, the ground cutter, the deformation elements such as isolation knife, whether insulator shields, quantity etc.) influence of fading to ultrahigh-frequency signal is very large, sensor allocation position and quantity variance that each producer proposes are very large, how the user is verified the rationality of the sensor arrangement that producer proposes, apolegamy has product and the sensor allocation plan of effective detection effect and realizes best economy, has important engineering significance.The entity GIS evaluation test platform of partial-discharge ultrahigh-frequency pick-up unit of the present utility model can be realized performance evaluation and the sensor allocation plan rationality of partial-discharge ultrahigh-frequency detection system are determined.
Description of drawings
Fig. 1 is GIS structural representation of the present utility model;
Fig. 2 is the A phase structure synoptic diagram along the E-E line section of Fig. 1;
Fig. 3 is the B phase structure synoptic diagram along the F-F line section of Fig. 1;
Fig. 4 is the C phase structure synoptic diagram along the D-D line section of Fig. 1.
Embodiment
As shown in the figure, the entity GIS evaluation test platform embodiment of partial-discharge ultrahigh-frequency pick-up unit of the present utility model is the improvement that the GIS three-phase cavity on existing entity GIS evaluation test platform is done, and comprising:
At first, have additional a plurality of cover plates that probe is housed at GIS three-phase cavity, its size is identical with the upper hand hole flange of GIS, and the unipole antenna of a copper probe manufacturing has been run through as emitting antenna in the cover plate center, afterbody is picked out by the N-type head, is used for injecting to the GIS cavity Partial discharge signal of simulation.
Secondly, in GIS three-phase cavity, setting up experimental cabin, generally is to have the position of flange to set up at the GIS cavity, and some is existing hand hole on cavity, such as 3, No. 5 experimental cabins among Fig. 2, some is as required special perforate, such as 1,2, No. 4 experimental cabin among Fig. 2, in order to place Typical PD Models, built-in sensors and the cover plate of probe is housed, the size of perforate will be taken into account the size of built-in sensors, near the Structural Design Requirement the position will meet simultaneously.
So-called experimental cabin is exactly to have opened individual hole at GIS three-phase cavity on the basis that does not affect the GIS performance, covers with dismountable flange, and the GIS cavity is experimental cabin cabin body namely, can be used as placing discharge source, built-in sensors etc.
Have again, set up the medium window formula at GIS three-phase cavity exactly and detect cover plate: the center has the high-tension apparatus hand hole cover plate of medium window, this medium window is insulation dielectric sheet material matter, can regard as and in the middle of the hand hole cover plate, open individual window, can be used for later stage installation partial-discharge ultrahigh-frequency sensor to receive the local discharge signal of GIS inside, the medium window formula detects the installation site of cover plate and sees Fig. 3.
In addition, also comprise following transformation to GIS three-phase mechanism:
(1) in order to test the electromagnetic wave that leaks out via disc insulator, determine the allocation plan of optimal installation of sensors with research electromagnetic attenuation behind process GIS all parts, all disc insulators of A phase all do not have shading ring, are full open type.
(2) for the perforate of studying different size on the shading ring for the electromagnetic impact that radiates, to seek the size of the most rational shading ring perforate, the disc insulator of C phase has shading ring, but have the holes of different sizes on the shading ring, the dimension reference in hole the size of present each preformed hole of GIS producer on similar structures.
(3) in non-pressurized situation, in line with the principle that is beneficial to signal and propagates from the inlet wire distal-most end to bus, the experimental cabin of setting up in A, B, C three-phase inlet wire side and A, C phase entrance bushing position, each increases by a hand hole, can change the flange that is mounted with probe, utilize the method research Injection Signal of simulation signal generator injection at the propagation law of GIS.
(4) A, B, C three-phase all are designed with special experimental cabin, have 5 experimental cabins as example mutually take illustrated A, there are two on the bus, experimental cabin inside is used for placing Typical PD Models, its cover plate can replace with cover plate and medium window formula that built-in sensors is housed and detect cover plate, the experimental cabin of some specific positions: move down from shown position such as No. 1 perforate, position of opening should be corresponding with conductor position in the isolating switch, also will avoid radome and arc-chutes; No. 5 experimental cabin position of opening are over against the conductor door lightning arrester joint radome that staggers;
(5) the every phase of GIS has built-in sensors, generally is placed on the inlet wire air chamber of isolating switch air chamber, bus and three-phase, and built-in sensors both can be used as receiving antenna, receives the UHF signal when true discharge; Also can be used as emitting antenna and in the GIS cavity, inject the simulation Partial discharge signal.The cover plate Assurance of Size of sensor is consistent with the experimental cabin cover plate, is convenient for changing.
1, Partial discharge signal propagation law and sensor allocation plan Rationality Study
I1~the I7 (as shown in fig. 1) of the A phase of GIS is open type disc insulator (unshielded ring), after selecting a certain experimental cabin to place Typical PD Models during test, pressurization produces discharge, and outer sensor is attached to office of acceptance's discharge signal on each disc insulator; In non-pressurized situation, utilize simulation signal generator to pass through built-in sensors or probe Injection Signal in the GIS, at the position detection signal of I1~I7 basin, can with the pressurization situation under do contrast.
2, the research of shading ring bore size on the disc insulator
All disc insulators of C phase all are the forms of shielding endless belt perforate, after placing the discharging model discharge, choose a certain basin among I1~I7, at the tapping of its different size outer sensor measuring-signal, determine suitable size according to the power of radiation signal, before GIS dispatches from the factory, at basin bore size is set in order to instruct GIS producer.

Claims (3)

1. the entity GIS evaluation test platform of a partial-discharge ultrahigh-frequency pick-up unit, comprise GIS three-phase cavity, it is characterized in that: have additional the cover plate that at least one is equipped with probe at described GIS three-phase cavity, its size is identical with the upper hand hole flange of GIS three-phase cavity, the unipole antenna of a copper probe manufacturing has been run through as emitting antenna in the cover plate center, afterbody is picked out by the N-type head, is used for injecting to GIS three-phase cavity the Partial discharge signal of simulation; In described GIS three-phase cavity, set up at least one experimental cabin, the position of experimental cabin is that flange or existing hand hole or special perforate are arranged on the GIS cavity; Open the central medium window in the middle of the hand hole cover plate on described GIS three-phase cavity, medium window is insulation dielectric sheet material matter; On the described GIS three-phase cavity, all disc insulators of A phase all do not have shading ring, are full open type, and the disc insulator of C phase has shading ring, have the hole of different sizes on the shading ring; The experimental cabin of setting up in A, B, C three-phase inlet wire side and A, C phase entrance bushing position, each increases by a hand hole, changes the flange that is mounted with probe; Every phase has built-in sensors, is placed on the inlet wire air chamber of isolating switch air chamber, bus and three-phase, and the cover plate size of sensor is consistent with the experimental cabin cover plate.
2. the entity GIS evaluation test platform of partial-discharge ultrahigh-frequency pick-up unit according to claim 1, it is characterized in that: A, B, C three-phase all are provided with experimental cabin, A has 5 experimental cabins mutually, there are two on the bus, experimental cabin inside is used for placing Typical PD Models, and its cover plate replaces with cover plate and medium window formula that built-in sensors is housed and detects cover plate.
3. the entity GIS evaluation test platform of partial-discharge ultrahigh-frequency pick-up unit according to claim 2 is characterized in that: existing No. 1 experimental cabin perforate is displaced downwardly to corresponding with conductor position in the isolating switch, No. 5 experimental cabin position of opening are over against the conductor door.
CN 201220457050 2012-09-07 2012-09-07 Entity GIS evaluation test platform of partial discharge ultra-high frequency detection device Withdrawn - After Issue CN202837525U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102866376A (en) * 2012-09-07 2013-01-09 广东电网公司电力科学研究院 Entity gas insulated switchgear (GIS) evaluation test platform of local discharging ultrahigh-frequency detection device
CN109799435A (en) * 2019-03-05 2019-05-24 重庆大学 A kind of local discharge sensor combining graphene diaphragm and micro optical fiber interference cavity and the detection method based on this

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102866376A (en) * 2012-09-07 2013-01-09 广东电网公司电力科学研究院 Entity gas insulated switchgear (GIS) evaluation test platform of local discharging ultrahigh-frequency detection device
CN109799435A (en) * 2019-03-05 2019-05-24 重庆大学 A kind of local discharge sensor combining graphene diaphragm and micro optical fiber interference cavity and the detection method based on this

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Granted publication date: 20130327

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