CN202563057U - Transformer iron core ground wire broadband partial discharge detector - Google Patents
Transformer iron core ground wire broadband partial discharge detector Download PDFInfo
- Publication number
- CN202563057U CN202563057U CN2012202144808U CN201220214480U CN202563057U CN 202563057 U CN202563057 U CN 202563057U CN 2012202144808 U CN2012202144808 U CN 2012202144808U CN 201220214480 U CN201220214480 U CN 201220214480U CN 202563057 U CN202563057 U CN 202563057U
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- transformer
- partial discharge
- discharge detector
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Abstract
The invention relates to a transformer iron core ground wire broadband partial discharge detector, which is characterized in that a cross-core foldable broadband pulse current sensor (1) is embedded in a ground wire of a transformer, a partial discharge signal of the transformer can be obtained, and is led out through 75 ohm double shield signal coaxial cable (2), is sent to an amplifier in (3) for amplification, is passed through a filter for filtering to obtain the signal, the signal is sent to an oscilloscope (4) through a transmission line; the signal collected by a disc type antenna (7) is performed amplification and filtering through a power frequency signal amplifier and the filter (8) to obtain the signal and sent into the oscilloscope (4) for taking as a reference phase signal. After the signal collection is completed by the oscilloscope, the signal is transmitted into a notebook computer (6), and is stored and analyzed by the computer, the severe degree of the internal discharge of the transformer is determined for determining whether the maintenance with stopping the power is carried out or not. The transformer iron core ground wire broadband partial discharge detector has the advantages of simple operation, simple structure, small volume and low cost.
Description
Technical field
The utility model relates to a kind of transformer core ground wire broadband local discharge detection device, can confirm the minor insulation state of transformer even the state of insulation of whole transformer, in the hope of effectively improving the safe operation ability of electrical network, reduces the maintenance and repair cost.
Background technology
Detecting transformer core ground wire broadband shelf depreciation common method at present is the broadband laser pulse electric current testing; In the detection frequency band range of broad, detect the pulsed current signal that shelf depreciation produces; In essence; Wideband pulse current method detection method is the broadening of conventional pulse current method on frequency range; The advantage such as contain much information that this just makes this method have bandwidth, comprise had both kept the advantage that conventional pulse current method can be measured discharge capacity, can reflect the pulse current characteristic of shelf depreciation simultaneously more truly.
Yet traditional pulse current detection method needs the 220V ac power supply, is that the local discharge signal that collects provides fixed phase through the 220V power supply, and this equipment that just makes waits inconvenience to find the place of 220V external power supply to use out of doors and is restricted.
The utility model content
Can not find the limitation of using under the situation of 220V power supply in inconvenience in order to overcome existing transformer core ground wire broadband Partial discharge detector, all consumers of the utility model adopt powered battery.
The utility model is realized through following technical scheme.
A kind of transformer core ground wire broadband Partial discharge detector; The utility model characteristic is: be connected with wave filter with the power frequency component amplifier through concentric cable by oscillograph; The power frequency component amplifier is connected with current sensor through concentric cable with wave filter, and the current sensor pincers are enclosed within on the ground wire of transformer; Oscillograph also is connected with computer through USB cable; Oscillograph also is connected with wave filter through concentric cable, and wave filter is connected with the dish-type antenna.
All consumers of the utility model all adopt powered battery; Directly do not use the power supply of 220V power supply that fixed phase is provided; And obtain power frequency component by the dish-type antenna through the inductive spacing power frequency electric field in addition; Power frequency component is through amplifier and wave filter amplifies and filtering, and the signal that obtains is sent into oscillograph, for the collection of local discharge signal provides fixed phase.
The utility model current sensor adopts punching opening and closing type broadband laser pulse current sensor; Concentric cable adopts 75 ohm of double shield signal concentric cable.
The principle of the utility model is: obtain power frequency component by a dish-type antenna through the inductive spacing power frequency electric field; Power frequency component is through amplifier and wave filter amplifies and filtering; The signal that obtains is sent into oscillograph, and replacement 220V power supply is that the collection of local discharge signal provides fixed phase.The concrete technical scheme of the utility model is: broadband laser pulse current sensor pincers are enclosed within on the ground wire of transformer; Obtain the partial discharge of transformer signal, draw, amplify through amplifier through concentric cable; Carry out filtering through wave filter again, the signal that obtains is sent into oscillograph by transmission line; The signal that the dish-type antenna collects is through the power frequency component amplifier and wave filter amplifies and filtering, and the signal that obtains is sent into oscillograph phase signal as a reference.Accomplish the collection of signal by oscillograph after, import computer into, accomplish the storage and the analysis of signal by computing machine.
Use the beneficial effect of the utility model to be; Having remedied when transformer core carried out Partial Discharge Detection does not have under the situation of 220V power supply; The deficiency of fixed phase can't be provided, can show very easily and the acquisition pulse signal, on the acquisition mode of signal, have very strong dirigibility; Because oscillograph and computing machine are matured product, this cover system have very easy maintainability and a very strong reliability.The utility model thereby easy and simple to handle, and simple in structure, volume is little, and the circuit that is adopted is the normal conventional circuit, thereby cost is low.
Description of drawings
Fig. 1 is the electric connection structure synoptic diagram of the utility model.
Embodiment
See Fig. 1; A kind of transformer core ground wire broadband Partial discharge detector; The utility model characteristic is: be connected with wave filter 3 with the power frequency component amplifier through concentric cable 2 by oscillograph 4; The power frequency component amplifier is connected with current sensor 1 through concentric cable 2 with wave filter 3, and current sensor 1 pincers are enclosed within on the ground wire of transformer; Oscillograph 4 also is connected with computer 6 through USB cable 5; Oscillograph 4 also is connected with wave filter 8 through concentric cable, and wave filter 8 is connected with dish-type antenna 7.
All consumers of the utility model all adopt powered battery; Directly do not use the power supply of 220V power supply that fixed phase is provided; And obtain power frequency component by the dish-type antenna through the inductive spacing power frequency electric field in addition; Power frequency component is through amplifier and wave filter amplifies and filtering, and the signal that obtains is sent into oscillograph, for the collection of local discharge signal provides fixed phase.
The utility model current sensor 1 adopts punching opening and closing type broadband laser pulse current sensor 1; Concentric cable 2 adopts 75 ohm of double shield signal concentric cable 2.
Broadband laser pulse current sensor 1 utilizes the rogowski coil principles, but adopts punching folding form, can clamp on the ground wire that is enclosed within transformer easily; Obtaining local discharge signal, very faint in view of office's discharge signal, be that the amplifier that 10 meters concentric cable 2 is delivered in the wave filter 3 amplifies with this signal through length; Carry out filtering through wave filter again; Selected suitable detection frequency band, filtering is partly disturbed, and the signal that obtains is sent into oscillograph by transmission line; Dish-type antenna 7 obtains power frequency component through the inductive spacing power frequency electric field, and power frequency component amplifies and filtering through amplifier and wave filter 8, and the signal that obtains is sent into oscillograph 4, for the collection of local discharge signal provides fixed phase.After the collection by oscillograph 4 completion signals, import notebook computer 6 into, accomplish the storage and the analysis of signal by computing machine through USB cable 5., continuous on-line monitoring long-time to the partial discharge of transformer situation to realize effectively reflect the inside shelf depreciation Changing Pattern under the transformer actual working state, and the order of severity of judging the transformer internal discharge is to determine whether interruption maintenance.
Claims (3)
1. transformer core ground wire broadband Partial discharge detector; It is characterized in that: be connected with wave filter (3) with the power frequency component amplifier through concentric cable (2) by oscillograph (4); The power frequency component amplifier is connected with current sensor (1) through concentric cable (2) with wave filter (3), and current sensor (1) pincers are enclosed within on the ground wire of transformer; Oscillograph (4) also is connected with computer (6) through USB cable (5); Oscillograph (4) also is connected with wave filter (8) through concentric cable, and wave filter (8) is connected with dish-type antenna (7).
2. transformer core ground wire broadband according to claim 1 Partial discharge detector, it is characterized in that: all consumers all adopt powered battery.
3. transformer core ground wire broadband according to claim 1 Partial discharge detector is characterized in that: current sensor (1) adopts punching opening and closing type broadband laser pulse current sensor (1); Concentric cable (2) adopts 75 ohm of double shield signal concentric cable (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202144808U CN202563057U (en) | 2012-05-14 | 2012-05-14 | Transformer iron core ground wire broadband partial discharge detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202144808U CN202563057U (en) | 2012-05-14 | 2012-05-14 | Transformer iron core ground wire broadband partial discharge detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202563057U true CN202563057U (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012202144808U Expired - Lifetime CN202563057U (en) | 2012-05-14 | 2012-05-14 | Transformer iron core ground wire broadband partial discharge detector |
Country Status (1)
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| CN (1) | CN202563057U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197272A (en) * | 2013-03-15 | 2013-07-10 | 中国电力科学研究院 | System and method of measuring performance of partial discharge transient state ground voltage detector |
| RU2540687C1 (en) * | 2013-07-30 | 2015-02-10 | Общество с ограниченной ответственностью "Тольяттинский Трансформатор" | Power transformer |
| CN107037401A (en) * | 2017-05-24 | 2017-08-11 | 国网辽宁省电力有限公司电力科学研究院 | One kind electric discharge source position visualization device |
| CN108957258A (en) * | 2018-07-06 | 2018-12-07 | 深圳供电局有限公司 | High-voltage cable very high frequency partial discharge live-line test device and test method |
| CN109031060A (en) * | 2018-07-06 | 2018-12-18 | 深圳供电局有限公司 | Live very high frequency partial discharge testing device and method for outdoor cable terminal on tower |
| CN109100625A (en) * | 2018-10-29 | 2018-12-28 | 国网河北省电力有限公司电力科学研究院 | A kind of detection circuit for partial discharge and detector |
| CN109444528A (en) * | 2018-11-05 | 2019-03-08 | 北京许继电气有限公司 | A kind of Transformer Condition Monitoring System and method based on iron core grounding current |
| CN113959632A (en) * | 2021-11-29 | 2022-01-21 | 华北电力大学 | Vacuum degree detection method for vacuum electrical equipment based on low-energy X-ray ionization |
-
2012
- 2012-05-14 CN CN2012202144808U patent/CN202563057U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197272A (en) * | 2013-03-15 | 2013-07-10 | 中国电力科学研究院 | System and method of measuring performance of partial discharge transient state ground voltage detector |
| CN103197272B (en) * | 2013-03-15 | 2016-01-20 | 中国电力科学研究院 | A kind of system and method testing partial discharge transient earth voltage detector performance |
| RU2540687C1 (en) * | 2013-07-30 | 2015-02-10 | Общество с ограниченной ответственностью "Тольяттинский Трансформатор" | Power transformer |
| CN107037401A (en) * | 2017-05-24 | 2017-08-11 | 国网辽宁省电力有限公司电力科学研究院 | One kind electric discharge source position visualization device |
| CN108957258A (en) * | 2018-07-06 | 2018-12-07 | 深圳供电局有限公司 | High-voltage cable very high frequency partial discharge live-line test device and test method |
| CN109031060A (en) * | 2018-07-06 | 2018-12-18 | 深圳供电局有限公司 | Live very high frequency partial discharge testing device and method for outdoor cable terminal on tower |
| CN109100625A (en) * | 2018-10-29 | 2018-12-28 | 国网河北省电力有限公司电力科学研究院 | A kind of detection circuit for partial discharge and detector |
| CN109444528A (en) * | 2018-11-05 | 2019-03-08 | 北京许继电气有限公司 | A kind of Transformer Condition Monitoring System and method based on iron core grounding current |
| CN109444528B (en) * | 2018-11-05 | 2020-09-18 | 北京许继电气有限公司 | Transformer state monitoring system and method based on iron core grounding current |
| CN113959632A (en) * | 2021-11-29 | 2022-01-21 | 华北电力大学 | Vacuum degree detection method for vacuum electrical equipment based on low-energy X-ray ionization |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |