CN204241500U - Buchholz relay oil stream flow velocity acquisition system - Google Patents
Buchholz relay oil stream flow velocity acquisition system Download PDFInfo
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- CN204241500U CN204241500U CN201420744439.0U CN201420744439U CN204241500U CN 204241500 U CN204241500 U CN 204241500U CN 201420744439 U CN201420744439 U CN 201420744439U CN 204241500 U CN204241500 U CN 204241500U
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- 230000005611 electricity Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000000540 analysis of variance Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model discloses a kind of Buchholz relay oil stream flow velocity acquisition system, the signal output part of traffic monitoring sensor connects the signal input part of electric quantity acquisition and pen recorder by wire; The voltage signal inputs of electric quantity acquisition and pen recorder, current signal input end, oil temperature signal input end and inside transformer pressure signal input end are connected the voltage signal output end of oil-immersed power transformer, current signal output end, oil temperature signal output terminal and inside transformer signal output end respectively.The utility model can carry out fluid-velocity survey to insulating oil stream ducted between oil-immersed power transformer body and conservator, real time record inlet wire line voltage current value, oil temperature and inside transformer force value simultaneously, equipment can long-time running online, the foundation of reason is searched when its monitoring record data can be used as fault, the flow speed value of grave gas action moment record provides reference frame for grave gas setting valve verifies, and carries out grave gas setting valve adjustment comparatively accurately.
Description
Technical field
The utility model relates to Buchholz relay grave gas setting valve inspection field, particularly relates to a kind of for providing the Buchholz relay oil stream flow velocity acquisition system of technical support for the verification of Buchholz relay grave gas setting valve.
Background technology
Transformer is one of important electrical of transformer station, and its safe operation is directly connected to the continuous and steady operation of whole electric system.Oil-immersed power transformer and reactor are the widely used high-tension apparatuses of current electric system, and because its cost is high, complex structure, once damage of breaking down, reparation difficulty is large, repair time is long, can bring serious economic loss to enterprise simultaneously.The proterctive equipment relevant to transformer is various, comprises electric quantity type protection and the protection of non electrical quantity type.The internal fault insufficient sensitivity of electric quantity type protection to transformer body; this is mainly because internal fault is from turn-to-turn short circuit; although the fault current of short circuit circle inside is very large, is reflected to line current little, only has fault progression just can cut off the electricity supply to when multiturn short circuit or shorted to earth.Therefore, what relate to transformer body protection mostly have employed non electrical quantity type, as pressure relief valve safeguard measure.Gas relay protection is also weighed protection, safeguard measure important when being oil-immersed power transformer generation internal fault, and the main protection of oil-immersed power transformer internal fault is exactly grave gas protection, can excise faulty equipment at once.
In oil-immersed power transformer, the grave gas protection of Buchholz relay relies on the insulating oil of transformer body inside to spring up realization to conservator; when pressure in transformer-cabinet raises; insulating oil flows to conservator; the baffle plate of Buchholz relay inside will be impacted when oil springs up; when reaching certain speed; baffle plate bearing pressure exceedes setting valve when arranging pressure, the closing of contact.As can be seen here, the insulating oil stream situation in pipeline directly reacted Buchholz relay baffle plate bear the size of oil flow pressure, the flow velocity size of insulating oil stream and baffle plate proportional pressure relation, therefore, the size of research pipeline oil Flow Velocity has very important significance.
The research and development of the domestic and international on-line monitoring technique about transformer oil flow velocity are at present still blank, also do not have achievement in research and the product of this respect; The grave gas protection seting value of Buchholz relay is remained and adjusts by empirical value, specifically adjust for a certain transformer (reactor) and whether rationally cannot verify; And when external information and experience can only be relied on after grave gas protection act to infer whether correct operation, there is no before and after fault that inside transformer oil flow speed data can be for reference.Although electric system for many years takes a large amount of manpowers at the heavy gas flow speed value of Buchholz relay and light gas volumetric values context of detection every year, material resources and financial resources, but due to the limitation of checkout equipment and detection means, the electric power accident caused because many reasons causes Buchholz relay frequent movement happens occasionally, for guaranteeing the safe operation of power transformer, how accurately measuring and adjustation Buchholz relay flow speed value, this becomes Operation of Electric Systems, the extensive concern of the relevant personnel such as checking experiment and questions of common interest, this is also be engaged in the energy monitoring apparatus development and production aspect relevant personnel should pay close attention to problem.
Often there is the fault that causes transformer to trip due to transformer body grave gas false protection in each electric power enterprise in recent years, and electric system, transformer reliability operation level and power consumer power supply reliability are all affected; Simultaneously in view of grave gas protective device is to the fault high sensitivity and the vital role that reflect Transformer Winding turn-to-turn short circuit or built-in electrical insulation electric arc; once malfunction thoroughly must investigate thoroughly reason of false action; can put into operation after transformer body non-fault; thus add a large amount of work on the spot, therefore must take measures to stop protection malfunction.
Utility model content
The purpose of this utility model is to provide a kind of Buchholz relay oil stream flow velocity acquisition system, fluid-velocity survey can be carried out to insulating oil stream ducted between oil-immersed power transformer body and conservator, real time record inlet wire line voltage current value, oil temperature and inside transformer force value simultaneously, equipment can long-time running online, its monitoring record data provide reference frame with for the verification of grave gas setting valve, for the adjustment of grave gas setting valve provides technical support.
The utility model adopts following technical proposals:
A kind of Buchholz relay oil stream flow velocity acquisition system, comprise the traffic monitoring sensor be arranged on Buchholz relay and oil-immersed power transformer body connecting tube vertical component, the signal output part of traffic monitoring sensor connects the signal input part of electric quantity acquisition and pen recorder by wire; The voltage signal inputs of electric quantity acquisition and pen recorder, current signal input end, oil temperature signal input end and inside transformer pressure signal input end are connected the voltage signal output end of oil-immersed power transformer, current signal output end, oil temperature signal output terminal and inside transformer signal output end respectively.
Described wire adopts twisted-pair feeder, and twisted-pair feeder outside is disposed with screen layer and metallic bellows.
Described electric quantity acquisition and pen recorder adopt synchronized phase measurement device.
Unit when described Buchholz relay oil stream flow velocity acquisition system is connected with GPS couple.
The utility model is difficult to for reason after some protection action in current rig-site utilization the phenomenon found out, by carrying out fluid-velocity survey to insulating oil stream ducted between oil-immersed power transformer body and conservator, real time record inlet wire line voltage current value and oil temperature force value simultaneously, Data support is provided for oil in age at failure flows the analysis of variance procedure sprung up in pipeline between conservator and conservator, simultaneously with the oil-immersed power transformer inlet wire line voltage value collected, current value, oil temperature and inside transformer force value are as auxiliary judgment, for the adjustment of grave gas setting valve provides reference frame.
Accompanying drawing explanation
Fig. 1 is the structural representation of Buchholz relay described in the utility model oil stream flow velocity acquisition system.
Embodiment
As shown in Figure 1; Buchholz relay 6 oil stream flow velocity acquisition system described in the utility model comprises traffic monitoring sensor 1; on the pipeline that the level that existing Buchholz relay 6 is installed on nearly conservator 2 side between conservator 2 and oil-immersed power transformer body 3 tilts slightly; trapped gas in Buchholz relay 6 will be made when discharging gas in oil-immersed power transformer and being too much, thus make oil level decline cause light gas protecting action.Because this horizontal pipe is equipped with the joint flange at Buchholz relay 6 and two ends, the smooth straight long portion stayed is divided seldom, is not suitable for installing traffic monitoring sensor 1.Therefore, choose Buchholz relay 6 in the utility model, with oil-immersed power transformer body 3 connecting tube vertical component, traffic monitoring sensor 1 is installed, the insulating oil flowing through vertical component pipeline flows into Buchholz relay 6 completely, therefore the inside oil flow surge situation of vertical component pipeline and Buchholz relay 6 inner completely the same, measuring accuracy can be improved significantly.Traffic monitoring sensor 1 adopts the traffic monitoring sensor 1 of high sampling rate, as UCT3488.The data from digital interface that traffic monitoring sensor 1 Collect conversion completes exports, although the speed of oil flow surge is very fast, still belong to mechanical motion, its pace of change is far below the pace of change of electricity.In the utility model traffic monitoring sensor 1 data collection period and export and postpone at the order of magnitude of several milliseconds, abundant sampling number can be collected according to the state for observing when comparison fault occurs like this in whole oil stream period of change.The signal output part of traffic monitoring sensor 1 connects the signal input part of electric quantity acquisition and pen recorder 4 by wire 5; The voltage signal inputs of electric quantity acquisition and pen recorder 4, current signal input end, oil temperature signal input end and inside transformer pressure signal input end are connected the voltage signal output end of oil-immersed power transformer, current signal output end, oil temperature signal output terminal and inside transformer signal output end respectively.
In the present embodiment, wire 5 adopts twisted-pair feeder, and twisted-pair feeder outside is disposed with screen layer and metallic bellows, can play good electromagnetic protection effect.
The EC203 synchronized phase measurement device that electric quantity acquisition and pen recorder 4 adopt Shanghai Yi Kong electric system Engineering Co., Ltd to produce, it can gather electricity and the non electrical quantity information of transformer, and utilizes high-speed data channel to be transferred to control center and record target electric parameter when stamping.
The data that traffic monitoring sensor 1 exports are undertaken gathering and storing by electric quantity acquisition and pen recorder 4, electric quantity acquisition and pen recorder 4 are also responsible for oil-immersed power transformer inlet wire line voltage value and current value, oil temperature and the inside transformer force value in sampling corresponding moment simultaneously, use as analyses and comparison, comparison is had in order to make all record data, unit when Buchholz relay 6 oil stream flow velocity acquisition system is also connected with GPS couple, with the time consistency of the absolute time and other equipment of electrical network that ensure Buchholz relay 6 oil stream flow velocity acquisition system.
Claims (4)
1. a Buchholz relay oil stream flow velocity acquisition system, it is characterized in that: comprise the traffic monitoring sensor be arranged on Buchholz relay and oil-immersed power transformer body connecting tube vertical component, the signal output part of traffic monitoring sensor connects the signal input part of electric quantity acquisition and pen recorder by wire; The voltage signal inputs of electric quantity acquisition and pen recorder, current signal input end, oil temperature signal input end and inside transformer pressure signal input end are connected the voltage signal output end of oil-immersed power transformer, current signal output end, oil temperature signal output terminal and inside transformer signal output end respectively.
2. Buchholz relay oil stream flow velocity acquisition system according to claim 1, is characterized in that: described wire adopts twisted-pair feeder, and twisted-pair feeder outside is disposed with screen layer and metallic bellows.
3. Buchholz relay oil stream flow velocity acquisition system according to claim 2, is characterized in that: described electric quantity acquisition and pen recorder adopt synchronized phase measurement device.
4. Buchholz relay according to claim 3 oil stream flow velocity acquisition system, is characterized in that: unit when described Buchholz relay oil stream flow velocity acquisition system is connected with GPS couple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420744439.0U CN204241500U (en) | 2014-12-03 | 2014-12-03 | Buchholz relay oil stream flow velocity acquisition system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420744439.0U CN204241500U (en) | 2014-12-03 | 2014-12-03 | Buchholz relay oil stream flow velocity acquisition system |
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| CN204241500U true CN204241500U (en) | 2015-04-01 |
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| CN201420744439.0U Withdrawn - After Issue CN204241500U (en) | 2014-12-03 | 2014-12-03 | Buchholz relay oil stream flow velocity acquisition system |
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| CN (1) | CN204241500U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569481A (en) * | 2014-12-03 | 2015-04-29 | 国网河南省电力公司电力科学研究院 | Oil flow speed acquiring system for gas relay, and heavy-gas setting-value verifying method |
| CN106374428A (en) * | 2016-09-26 | 2017-02-01 | 广东电网有限责任公司电力科学研究院 | Heavy gas protection method and system |
| CN108390356A (en) * | 2018-03-21 | 2018-08-10 | 广东电网有限责任公司电力科学研究院 | A kind of grave gas guard method based on fault time feature |
| CN109768522A (en) * | 2019-02-21 | 2019-05-17 | 西安交通大学 | The digital protection method of for transformer loaded tap-off oil circuit breaker |
| CN110411892A (en) * | 2019-09-04 | 2019-11-05 | 上海乐研电气有限公司 | A kind of contact point signal Acquisition Circuit of scene on-line testing gas density relay |
| CN110441676A (en) * | 2019-08-06 | 2019-11-12 | 国家电网有限公司 | Loaded tap switch oil current relay acting characteristic pilot system and test method |
| CN112649761A (en) * | 2020-11-26 | 2021-04-13 | 华北电力大学（保定） | Transformer heavy gas action setting method based on gas relay flow velocity and pressure intensity |
| CN113280884A (en) * | 2020-02-20 | 2021-08-20 | 阳江核电有限公司 | Gas quantity monitoring system, method and storage medium for gas relay of oil-immersed transformer |
-
2014
- 2014-12-03 CN CN201420744439.0U patent/CN204241500U/en not_active Withdrawn - After Issue
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569481A (en) * | 2014-12-03 | 2015-04-29 | 国网河南省电力公司电力科学研究院 | Oil flow speed acquiring system for gas relay, and heavy-gas setting-value verifying method |
| CN104569481B (en) * | 2014-12-03 | 2018-04-10 | 国网河南省电力公司电力科学研究院 | Buchholz relay oil stream flow velocity acquisition system and grave gas setting valve method of calibration |
| CN106374428A (en) * | 2016-09-26 | 2017-02-01 | 广东电网有限责任公司电力科学研究院 | Heavy gas protection method and system |
| CN108390356A (en) * | 2018-03-21 | 2018-08-10 | 广东电网有限责任公司电力科学研究院 | A kind of grave gas guard method based on fault time feature |
| CN108390356B (en) * | 2018-03-21 | 2019-08-30 | 广东电网有限责任公司电力科学研究院 | A kind of grave gas guard method based on fault time feature |
| CN109768522A (en) * | 2019-02-21 | 2019-05-17 | 西安交通大学 | The digital protection method of for transformer loaded tap-off oil circuit breaker |
| CN110441676A (en) * | 2019-08-06 | 2019-11-12 | 国家电网有限公司 | Loaded tap switch oil current relay acting characteristic pilot system and test method |
| CN110411892A (en) * | 2019-09-04 | 2019-11-05 | 上海乐研电气有限公司 | A kind of contact point signal Acquisition Circuit of scene on-line testing gas density relay |
| CN113280884A (en) * | 2020-02-20 | 2021-08-20 | 阳江核电有限公司 | Gas quantity monitoring system, method and storage medium for gas relay of oil-immersed transformer |
| CN112649761A (en) * | 2020-11-26 | 2021-04-13 | 华北电力大学（保定） | Transformer heavy gas action setting method based on gas relay flow velocity and pressure intensity |
| CN112649761B (en) * | 2020-11-26 | 2022-05-24 | 华北电力大学（保定） | Transformer heavy gas action setting method based on gas relay flow velocity and pressure intensity |
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Granted publication date: 20150401 Effective date of abandoning: 20180410 |
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| AV01 | Patent right actively abandoned |