CN206725710U - A kind of cable ac voltage withstanding and oscillation wave partial discharge test equipment - Google Patents
A kind of cable ac voltage withstanding and oscillation wave partial discharge test equipment Download PDFInfo
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- CN206725710U CN206725710U CN201720524898.1U CN201720524898U CN206725710U CN 206725710 U CN206725710 U CN 206725710U CN 201720524898 U CN201720524898 U CN 201720524898U CN 206725710 U CN206725710 U CN 206725710U
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Abstract
It the utility model is related to a kind of cable ac voltage withstanding and oscillation wave partial discharge test equipment, including the humorous device of ac voltage withstanding string being made up of frequency conversion main frame, exciting transformer, reactor, divider, it is additionally provided with wave of oscillation trigger action case, there is switch A and switch B inside the wave of oscillation trigger action case, switch A is connected between the input of the frequency conversion main frame and exciting transformer, and switch B is connected in parallel between the exciting transformer output end;Partial discharge collector is also in series between reactor and test product cable, the partial discharge collector is connected with partial discharge analysis system;It can coordinate with original series resonance pressure-resistant apparatus and complete the collection of cable wave of oscillation partial discharge, reduce overlapping investment, a tractor serves several purposes, you can do pressure test, and the partial discharge amount of measurable cable;And flexibility and reliability, safe ready, improve the efficiency of cable partial discharge detection;Also there is positioning function simultaneously, be easy to quickly find trouble point, repaired in time.
Description
Technical field
The utility model belongs to power cable insulation detection field, and specifically a kind of cable ac voltage withstanding and the wave of oscillation are local
Discharge test device.
Background technology
In recent years, with the fast development of electric power network, in urban distribution network caused by power cable shelf depreciation absolutely
Edge breakdown accident is more and more, and existing Partial Discharge Detection equipment is difficult to detect cable insulation hidden danger accurately and in time,
Further study and improved it is therefore desirable to the detection technique to cable local discharge.
Cable local discharge, abbreviation partial discharge, it is most important reason in cable insulation breakdown accident.Therefore develop more preferable
Partial discharge detection and positioner have great significance and economic value.The main flow partial discharge detection equipment of cable at present, can only be complete
Gathered into simple partial discharge, and its input signal frequency range is smaller, it is impossible to coordinate with existing series resonance pressure-resistant apparatus
The collection of cable wave of oscillation partial discharge is completed, while the sample rate of collecting device and sampling length are not very high, so being directed to cable
Wave of oscillation partial discharge detection device is improved seems particularly necessary to adapt to actual demand.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of cable ac voltage withstanding and oscillation wave partial discharge and surveyed
Equipment is tried, to solve defect present in prior art.
The technical scheme that the utility model solves above-mentioned technical problem is as follows:
A kind of cable ac voltage withstanding and oscillation wave partial discharge test equipment, including by frequency conversion main frame (1), exciting transformer
(2), the humorous device of ac voltage withstanding string that reactor (3), divider (4) are formed, is additionally provided with wave of oscillation trigger action case (6), institute
Stating inside wave of oscillation trigger action case (6) has switch A and switchs B, and the switch A is connected on the frequency conversion main frame (1) and encouraged
Between the input of magnetic transformer (2), the switch B is connected in parallel between the exciting transformer (2) output end;Reactor (3)
Partial discharge collector (7) is also in series between test product cable (5), the partial discharge collector is connected with partial discharge analysis system (8).
Further, the switch A and switch B is electronic switch, and it is internal by the wave of oscillation trigger action case (6)
Controller control its disconnect, closure;
Further, isolator is housed inside the partial discharge collector (7), power source is isolated with test product cable (5);
Further, the partial discharge analysis system (8) has been internally integrated Partial Discharge Sources position determination module.
The beneficial effects of the utility model are:
1st, the utility model can coordinate with original series resonance pressure-resistant apparatus completes the collection of cable wave of oscillation partial discharge, reduces
Overlapping investment, a tractor serves several purposes, you can do pressure test, and the partial discharge amount of measurable cable;And flexibility and reliability, safe ready,
Improve the efficiency of cable partial discharge detection.
2nd, the utility model partial discharge analysis system has reliable partial discharge location function, is easy to find trouble point in time, fast
Speed is rushed to repair.
Brief description of the drawings
Fig. 1 is the utility model structure diagram;
In accompanying drawing, the list of parts representated by each label is as follows:
1st, frequency conversion main frame;2nd, exciting transformer;3rd, reactor;4th, high-voltage capacitive divider;5th, test product cable;6th, the wave of oscillation
Trigger action case;7th, partial discharge collector;8th, partial discharge analysis system.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
As shown in figure 1, a kind of cable ac voltage withstanding and oscillation wave partial discharge test equipment, by a wave of oscillation triggering behaviour
Make case, and partial discharge collector and partial discharge analysis system composition.Coordinate with original ac voltage withstanding series resonant equipment to high-tension electricity
Cable can do pressure test, and the partial discharge amount of measurable cable, and the insulation to cable carries out state estimation.
Below to each group into being partly specifically described:
1 wave of oscillation trigger action case:
There are two electronic switches in control box, a switch A is connected on output and the excitation of series resonant equipment frequency conversion main frame
Become between input.Another switch B is connected in parallel in excitation-transformation variable output.A closures are switched when doing ac voltage withstanding, switch B disconnects.It is resistance to
Pressure experiment keeps test voltage when finishing, and presses partial discharge trigger button, and switch A disconnects, Simultaneous Switching B closures, and triggers simultaneously
Partial discharge collector starts to gather partial discharge.Switch A departs from main frame after disconnecting, and now partial discharge caused by frequency conversion main frame has been isolated disconnected
Open, Simultaneous Switching B closes to form measuring loop LC damp oscillatory waves, completes partial discharge test.
2 partial discharge collectors:
Partial discharge collector is connected between reactor and test product cable, and inside is equipped with isolator, and power source and cable are tried
Product are isolated, and collector is received the Partial discharge signal in cable.Interference signal is greatly lowered, improves precision and the spirit of measurement
Sensitivity.
3 partial discharge analysis systems:
The data that the collection of partial discharge collector comes up, carry out a point analysis of variance to Partial discharge signal by professional software, draw test
As a result.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (4)
1. a kind of cable ac voltage withstanding and oscillation wave partial discharge test equipment, including by frequency conversion main frame (1), exciting transformer
(2), the humorous device of ac voltage withstanding string that reactor (3), divider (4) are formed, it is characterised in that:It is additionally provided with wave of oscillation triggering behaviour
Make case (6), there is switch A and switch B, the switch A to be connected on the frequency conversion master inside the wave of oscillation trigger action case (6)
Between the input of machine (1) and exciting transformer (2), the switch B is connected in parallel between the exciting transformer (2) output end;
Partial discharge collector (7) is also in series between reactor (3) and test product cable (5), the partial discharge collector is connected with partial discharge analysis
System (8).
2. a kind of cable ac voltage withstanding according to claim 1 and oscillation wave partial discharge test equipment, it is characterised in that:
The switch A is electronic switch with switch B, and it controls it disconnected by the internal controller of the wave of oscillation trigger action case (6)
Open and close closes.
3. a kind of cable ac voltage withstanding according to claim 1 or 2 and oscillation wave partial discharge test equipment, its feature exist
In:Isolator is housed inside the partial discharge collector (7), power source is isolated with test product cable (5).
4. a kind of cable ac voltage withstanding according to claim 1 or 2 and oscillation wave partial discharge test equipment, its feature exist
In:The partial discharge analysis system (8) has been internally integrated Partial Discharge Sources position determination module.
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CN201720524898.1U CN206725710U (en) | 2017-05-05 | 2017-05-05 | A kind of cable ac voltage withstanding and oscillation wave partial discharge test equipment |
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CN201720524898.1U CN206725710U (en) | 2017-05-05 | 2017-05-05 | A kind of cable ac voltage withstanding and oscillation wave partial discharge test equipment |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108896885A (en) * | 2018-07-11 | 2018-11-27 | 云南电网有限责任公司电力科学研究院 | A kind of distribution transformer shelf depreciation and over-voltage monitoring equipment |
CN109581161A (en) * | 2018-12-18 | 2019-04-05 | 西安交通大学 | A kind of 10kV transformer Portable PD On-Line detection system based on oscillation wave |
CN110398674A (en) * | 2019-08-30 | 2019-11-01 | 国网山西省电力公司电力科学研究院 | A kind of extra-high voltage parallel reactance is pressure-resistant and local discharge test device |
CN110749809A (en) * | 2019-11-11 | 2020-02-04 | 深圳供电局有限公司 | GIS fault detection device and system |
CN111141998A (en) * | 2019-12-20 | 2020-05-12 | 国网浙江海盐县供电有限公司 | 10kV high-voltage cable alternating-current withstand voltage and partial discharge test system and method |
WO2023207037A1 (en) * | 2022-04-25 | 2023-11-02 | 云南电网有限责任公司临沧供电局 | Fault detection apparatus and method for high-voltage device in power distribution transformer area |
-
2017
- 2017-05-05 CN CN201720524898.1U patent/CN206725710U/en active Active
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108896885A (en) * | 2018-07-11 | 2018-11-27 | 云南电网有限责任公司电力科学研究院 | A kind of distribution transformer shelf depreciation and over-voltage monitoring equipment |
CN109581161A (en) * | 2018-12-18 | 2019-04-05 | 西安交通大学 | A kind of 10kV transformer Portable PD On-Line detection system based on oscillation wave |
CN110398674A (en) * | 2019-08-30 | 2019-11-01 | 国网山西省电力公司电力科学研究院 | A kind of extra-high voltage parallel reactance is pressure-resistant and local discharge test device |
CN110749809A (en) * | 2019-11-11 | 2020-02-04 | 深圳供电局有限公司 | GIS fault detection device and system |
CN111141998A (en) * | 2019-12-20 | 2020-05-12 | 国网浙江海盐县供电有限公司 | 10kV high-voltage cable alternating-current withstand voltage and partial discharge test system and method |
WO2023207037A1 (en) * | 2022-04-25 | 2023-11-02 | 云南电网有限责任公司临沧供电局 | Fault detection apparatus and method for high-voltage device in power distribution transformer area |
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