CN205404738U - High tension cable annex partial discharge detector device - Google Patents
High tension cable annex partial discharge detector device Download PDFInfo
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- CN205404738U CN205404738U CN201620164261.1U CN201620164261U CN205404738U CN 205404738 U CN205404738 U CN 205404738U CN 201620164261 U CN201620164261 U CN 201620164261U CN 205404738 U CN205404738 U CN 205404738U
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Abstract
The embodiment of the utility model discloses high tension cable annex partial discharge detector device, including high frequency signal sensor, high frequency signal transmission cable, synchronous frequency sensor, synchronous frequency transmission cable, data acquisition unit and data analysis unit. Wherein, high frequency signal sensor settings is the annular to the cover is outside the earthing cable of high tension cable annex, and the high frequency signal sensor passes through the high frequency signal transmission cable and links to each other with the data acquisition unit, and synchronous frequency sensor settings is the annular, and overlaps outside high tension cable, and the synchronous frequency sensor passes through the synchronous frequency transmission cable and links to each other with the data acquisition unit, and the data acquisition unit is connected with the data analysis unit electricity. The utility model discloses a set up the synchronous frequency sensor, it needs to adopt electric current travelling wave signal and 220V power frequency power supply to do the phase place to compare to have solved among the prior art high tension cable annex partial discharge detector dress process, and unable accurate judgement high tension cable annex has or not the problem of partial discharge signal.
Description
Technical field
This utility model relates to power cable state detection technique field, particularly relates to a kind of HV cable accessories local discharge detection device.
Background technology
High voltage power cable is widely applied in electrical network with its excellent insulating properties material, but, matched HV cable accessories equipment is but in operation the fault such as puncturing occur, burn again and again.Trace it to its cause the dimensional discrepancy being can exist on mounting process in installation process due to HV cable accessories, or the dust granules in lead-in cable adnexa, impurity etc. under complex environment, cause its expendable destruction.Meanwhile, also can there is certain insulation defect in cable accessory products in outgoing.For promoting cable run operational reliability, it is to avoid insulation defect causes operation troubles, and Partial Discharge Detection is particularly important as carrying out of operating insulation defect of high-voltage cable accessory hidden troubles removing means.
The detection method of existing HV cable accessories shelf depreciation includes pulse current method, bridge method, radio interference voltage method and some non-electrical detection methods, and sound, light, heat and the discharge product etc. that namely produce by catching shelf depreciation detect.Wherein, pulse current method is a kind of widely used method, by linear coupler through low-pressure side ground wire, by magnetic coupling, current traveling wave signal is acquired, and then the pulse current of PD signal detecting shelf depreciation and producing in earth lead.
In HV cable accessories partial discharge detecting system of the prior art, current traveling wave signal coupling process adopts 220V power frequency supply as phase reference.But, it is complicated and changeable to there is external interference in the high tension cable in power transmission, and Partial discharge signal amplitude is faint, and transmission speed is fast, there is obvious relaxation phenomenon, and 220V power frequency supply cannot matching accurate with reality.Therefore, the method that current traveling wave signal and 220V power frequency supply do phase place comparison is adopted can accurately not judge that HV cable accessories is with or without local discharge signal.
Utility model content
This utility model provides a kind of HV cable accessories local discharge detection device, current traveling wave signal and 220V power frequency supply is adopted to do phase place comparison solving prior art medium and high voltage cable adnexa Partial Discharge Detection process of assembling, it is impossible to accurately to judge the HV cable accessories problem with or without local discharge signal.
In order to solve above-mentioned technical problem, the utility model discloses following technical scheme:
A kind of HV cable accessories local discharge detection device, including high-frequency signal sensor, high frequency signal transmission cable, synchronizing frequency sensor, synchronizing frequency transmission cable, data acquisition unit and data analysis unit, wherein,
High-frequency signal sensor is set to annular, and high-frequency signal sensor sleeve is outside the earth cable of HV cable accessories；High-frequency signal sensor is connected with data acquisition unit by high frequency signal transmission cable；Synchronizing frequency sensor is set to annular, and synchronizing frequency sensor sleeve is outside high tension cable；Synchronizing frequency sensor is connected with data acquisition unit by synchronizing frequency transmission cable；Data acquisition unit electrically connects with data analysis unit.
Preferably, high-frequency signal sensor includes the first fixing buckle, radio-frequency induction coil, radio-frequency induction coil carrier, rotating shaft and high frequency signal transmission joint, wherein,
Radio-frequency induction coil carrier one end connection rotating shaft, the other end of radio-frequency induction coil carrier connects the first fixing buckle；Radio-frequency induction coil nests in radio-frequency induction coil carrier；High frequency signal transmission joint one end is connected with radio-frequency induction coil carrier, and the other end of high frequency signal transmission joint is connected with high frequency signal transmission cable.
Preferably, radio-frequency induction coil carrier is-180 ° along the open angle of rotating shaft.
Preferably, synchronizing frequency sensor includes the second fixing buckle, low frequency induction coil and synchronous frequency signal transfer connector, wherein,
Second fixing buckle is fixed on low frequency induction coil two ends；Synchronous frequency signal transfer connector is connected with low frequency induction coil.
Preferably, HV cable accessories local discharge detection device also includes Portable DC mains, and Portable DC mains electrically connects with data acquisition unit and data analysis unit respectively.
Preferably, data acquisition unit is single-chip microcomputer.
From above technical scheme, the HV cable accessories local discharge detection device that this utility model provides, high-frequency signal sensor is set to annular and is inserted in the earth cable of HV cable accessories, the high-frequency pulse current signal of detection HV cable accessories, and by transmission cable, pulsed current signal is transferred to data acquisition unit.Synchronizing frequency sensor is set to annular and is inserted in high voltage power cable, the low frequency pulse current signal of detection high tension cable, and by synchronizing frequency transmission cable, pulsed current signal is transferred to data acquisition unit.Data acquisition unit electrically connects with data analysis unit.The discrete electric pulse signal received is converted to the continuous print signal of telecommunication by data acquisition unit, data analysis unit accepts the high frequency electrical signal after conversion and low-frequency electrical signal simultaneously, high frequency electrical signal is coupled with low-frequency electrical signal, thus judging whether HV cable accessories exists partial discharge phenomenon.This utility model is by arranging synchronizing frequency sensor, solving prior art medium and high voltage cable adnexa Partial Discharge Detection process of assembling need to will adopt current traveling wave signal and 220V power frequency supply to do phase place comparison, it is impossible to accurately judge the HV cable accessories problem with or without local discharge signal.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, for those of ordinary skills, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The HV cable accessories local discharge detection device structural representation that Fig. 1 provides for this utility model embodiment；
The high-frequency signal sensor construction schematic diagram that Fig. 2 provides for this utility model embodiment；
The synchronizing frequency sensor construction schematic diagram that Fig. 3 provides for this utility model embodiment.
Illustrate:
1-high-frequency signal sensor, 2-synchronizing frequency sensor, 3-high frequency signal transmission cable, 4-synchronizing frequency transmission cable, 5-data acquisition unit, 6-data analysis unit, 7-Portable DC mains, 8-high tension cable, 9-HV cable accessories, 10-first fixes buckle, 11-radio-frequency induction coil, 12-radio-frequency induction coil carrier, 13-rotating shaft, 14-high frequency signal transmission joint, 20-second fixes buckle, 21-low frequency induction coil, 22-synchronous frequency signal transfer connector.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the technical scheme in this utility model, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, all should belong to the scope of this utility model protection.
The HV cable accessories local discharge detection device structural representation that Fig. 1 provides for this utility model embodiment, as seen from the figure, the HV cable accessories local discharge detection device that the present embodiment provides includes high-frequency signal sensor 1, high frequency signal transmission cable 3, synchronizing frequency sensor 2, synchronizing frequency transmission cable 4, data acquisition unit 5 and data analysis unit 6.
High-frequency signal sensor 1 is annular the earth cable being inserted in HV cable accessories 9.Electric power safety code specifies: the non-charged metal shell of electrical equipment will ground connection, therefore the aluminum bag of high tension cable or metal screen layer will ground connection.After high-frequency signal sensor 1 is inserted in the earth cable of HV cable accessories 9, the high-frequency pulse current signal of detection HV cable accessories, and by transmission cable 3, pulsed current signal is transferred to data acquisition unit 5.Synchronizing frequency sensor 2 is for annular and is inserted in high voltage power cable.After synchronizing frequency sensor 2 is inserted in high tension cable 8, the low frequency pulse current signal of detection high tension cable 8, and by synchronizing frequency transmission cable 4, pulsed current signal is transferred to data acquisition unit 5.
The high-frequency signal sensor that this utility model provides and synchronizing frequency sensor can respond steep-sided pulse signal, have higher sensitivity, and will have good frequency response characteristic in comparatively wide frequency range.The outer jacket of cable accessory has a metal screen layer closed, uhf electromagnetic wave signal there is good shielding action, it is unfavorable for that external ultra-high frequency antenna detects, in order to obtain good Detection results, sensor ring is directly detected by the high-frequency signal sensor in the present embodiment around attachment body, is effectively shielded from extraneous complex environment interference and extracts faint discharge signal.
The discrete electric pulse signal received is converted to the continuous print signal of telecommunication by data acquisition unit 5, data analysis unit 6 accepts the high frequency electrical signal after conversion and low-frequency electrical signal simultaneously, high frequency electrical signal is coupled with low-frequency electrical signal, thus judging whether HV cable accessories exists partial discharge phenomenon.This utility model is by arranging synchronizing frequency sensor, solving prior art medium and high voltage cable adnexa Partial Discharge Detection process of assembling need to will adopt current traveling wave signal and 220V power frequency supply to do phase place comparison, it is impossible to accurately judge the HV cable accessories problem with or without local discharge signal.
In the present embodiment, high-frequency signal sensor 1 includes the first fixing buckle 10, radio-frequency induction coil 11, radio-frequency induction coil carrier 12, rotating shaft 13 and high frequency signal transmission joint 14.Radio-frequency induction coil carrier 12 one end connection rotating shaft 13, the radio-frequency induction coil carrier 12 other end connects the first fixing buckle 10.HV cable accessories 9 earth cable is generally of aluminum bag or metal screen layer, and therefore the first fixing buckle 10 selects material to be metal.In the present embodiment, radio-frequency induction coil carrier 12 open angle is 0-180 °, facilitates high-frequency signal sensor 1 to be enclosed within outside HV cable accessories 9 earth cable.Radio-frequency induction coil carrier 12 size is corresponding with HV cable accessories 9 earth cable size.Radio-frequency induction coil 11 is nested in radio-frequency induction coil carrier 12, and high frequency signal transmission joint 14 one end is connected with radio-frequency induction coil carrier 12, and the other end is connected with high frequency signal transmission cable 3.Synchronizing frequency sensor 2 includes the second fixing buckle 20, low frequency induction coil 21 and synchronous frequency signal transfer connector 22.Second fixing buckle 20 is connected with low frequency induction coil 21 two ends, and synchronous frequency signal transfer connector 22 is connected with low frequency induction coil 21.Because high tension cable 8 is relatively large in diameter, synchronizing frequency sensor 2 is not provided with coil supporter, to increase the length of low frequency induction coil 21 so that it is effectively around high tension cable 8.Second fixing buckle 20 selects material to be rubber.
Data acquisition unit 5 electrically connects with data analysis unit 6.In the present embodiment, data acquisition unit 5 is single-chip microcomputer or the analog-digital converter with A/D modular converter, and data analysis unit 6 is computer.The discrete electric pulse signal received is converted to the continuous print signal of telecommunication by single-chip microcomputer, data analysis unit 6 accepts the high frequency electrical signal after conversion and low-frequency electrical signal simultaneously, high frequency electrical signal is coupled with low-frequency electrical signal, thus judging whether HV cable accessories exists partial discharge phenomenon.
HV cable accessories local discharge detection device also includes Portable DC mains 7, and Portable DC mains 7 electrically connects with data acquisition unit 5 and data analysis unit 6 respectively, powers when working for data acquisition unit 5 and data analysis unit 6.The HV cable accessories local discharge detection device that this utility model can be made to provide that arranges of Portable DC mains 7 does not need external power supply just can use, and meets the requirement of HV cable accessories local discharge detection device open air use.
It should be noted that, in this article, the such as relational terms of " first " and " second " or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment.When there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of key element, method, article or equipment.
Below it is only detailed description of the invention of the present utility model, makes to skilled artisans appreciate that or realize this utility model.The multiple amendment of these embodiments be will be apparent to one skilled in the art, and generic principles defined herein when without departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Below it is only detailed description of the invention of the present utility model; it should be pointed out that, for those skilled in the art, under the premise without departing from this utility model principle; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (6)
1. a HV cable accessories local discharge detection device, it is characterized in that, including high-frequency signal sensor (1), high frequency signal transmission cable (3), synchronizing frequency sensor (2), synchronizing frequency transmission cable (4), data acquisition unit (5) and data analysis unit (6), wherein
Described high-frequency signal sensor (1) is set to annular, and described high-frequency signal sensor (1) is enclosed within outside the earth cable of HV cable accessories；Described high-frequency signal sensor (1) is connected with described data acquisition unit (5) by described high frequency signal transmission cable (3)；Described synchronizing frequency sensor (2) is set to annular, and described synchronizing frequency sensor (2) is enclosed within outside high tension cable；Described synchronizing frequency sensor (2) is connected with described data acquisition unit (5) by described synchronizing frequency transmission cable (4)；Described data acquisition unit (5) electrically connects with described data analysis unit (6).
2. HV cable accessories local discharge detection device according to claim 1, it is characterized in that, described high-frequency signal sensor (1) includes the first fixing buckle (10), radio-frequency induction coil (11), radio-frequency induction coil carrier (12), rotating shaft (13) and high frequency signal transmission joint (14), wherein
Described radio-frequency induction coil carrier (12) one end connects described rotating shaft (13), and the other end of described radio-frequency induction coil carrier (12) connects the described first fixing buckle (10)；Described radio-frequency induction coil (11) nests in described radio-frequency induction coil carrier (12)；Described high frequency signal transmission joint (14) one end is connected with described radio-frequency induction coil carrier (12), and the other end of described high frequency signal transmission joint (14) is connected with described high frequency signal transmission cable (3).
3. HV cable accessories local discharge detection device according to claim 2, it is characterised in that described radio-frequency induction coil carrier (12) is 0-180 ° along the open angle of described rotating shaft (13).
4. HV cable accessories local discharge detection device according to claim 1, it is characterized in that, described synchronizing frequency sensor (2) includes the second fixing buckle (20), low frequency induction coil (21) and synchronous frequency signal transfer connector (22), wherein
Described second fixing buckle (20) is fixed on described low frequency induction coil (21) two ends；Described synchronous frequency signal transfer connector (22) is connected with described low frequency induction coil (21).
5. HV cable accessories local discharge detection device according to claim 1, it is characterized in that, described HV cable accessories local discharge detection device also includes Portable DC mains (7), and described Portable DC mains (7) electrically connects with described data acquisition unit (5) and described data analysis unit (6) respectively.
6. HV cable accessories local discharge detection device according to claim 1, it is characterised in that described data acquisition unit (5) is single-chip microcomputer.
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| CN201620164261.1U CN205404738U (en) | 2016-03-04 | 2016-03-04 | High tension cable annex partial discharge detector device |
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| CN201620164261.1U CN205404738U (en) | 2016-03-04 | 2016-03-04 | High tension cable annex partial discharge detector device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646152A (en) * | 2016-11-18 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | High voltage cable partial discharge detection method and device |
| CN106990334A (en) * | 2017-03-20 | 2017-07-28 | 国网安徽省电力公司 | A kind of operating frequency phase detection circuit in measurement of partial discharge corresponding to partial discharge pulse |
| CN108710066A (en) * | 2018-05-18 | 2018-10-26 | 青岛科技大学 | A kind of interface discharging detection device and its method |
| CN109038469A (en) * | 2018-09-03 | 2018-12-18 | 深圳供电局有限公司 | High-voltage cable straight joint structure |
| CN112881949A (en) * | 2021-01-18 | 2021-06-01 | 浙江华电器材检测研究所有限公司 | UHF partial discharge-based insulated puncture wire clamp contact state detection device and method |
| CN113189440A (en) * | 2021-03-09 | 2021-07-30 | 浙江图维科技股份有限公司 | Lead sealing communication detection device and method based on signal coupling technology |
-
2016
- 2016-03-04 CN CN201620164261.1U patent/CN205404738U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646152A (en) * | 2016-11-18 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | High voltage cable partial discharge detection method and device |
| CN106990334A (en) * | 2017-03-20 | 2017-07-28 | 国网安徽省电力公司 | A kind of operating frequency phase detection circuit in measurement of partial discharge corresponding to partial discharge pulse |
| CN108710066A (en) * | 2018-05-18 | 2018-10-26 | 青岛科技大学 | A kind of interface discharging detection device and its method |
| WO2019080494A1 (en) * | 2018-05-18 | 2019-05-02 | 青岛科技大学 | Interface discharge detection apparatus and method therefor |
| CN109038469A (en) * | 2018-09-03 | 2018-12-18 | 深圳供电局有限公司 | High-voltage cable straight joint structure |
| CN109038469B (en) * | 2018-09-03 | 2024-04-09 | 深圳供电局有限公司 | High-voltage cable straight-through joint structure |
| CN112881949A (en) * | 2021-01-18 | 2021-06-01 | 浙江华电器材检测研究所有限公司 | UHF partial discharge-based insulated puncture wire clamp contact state detection device and method |
| CN113189440A (en) * | 2021-03-09 | 2021-07-30 | 浙江图维科技股份有限公司 | Lead sealing communication detection device and method based on signal coupling technology |
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