CN109030924A - Suitable for the three-phase lightning protector leakage current wireless monitoring device in switchgear - Google Patents
Suitable for the three-phase lightning protector leakage current wireless monitoring device in switchgear Download PDFInfo
- Publication number
- CN109030924A CN109030924A CN201810607565.4A CN201810607565A CN109030924A CN 109030924 A CN109030924 A CN 109030924A CN 201810607565 A CN201810607565 A CN 201810607565A CN 109030924 A CN109030924 A CN 109030924A
- Authority
- CN
- China
- Prior art keywords
- module
- leakage current
- current
- switchgear
- lightning protector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
The present invention provides a kind of three-phase lightning protector leakage current wireless monitoring devices suitable in switchgear, including current transformer and monitoring unit；The current transformer is connected between the ground line of three-phase lightning protector and the monitoring unit；The monitoring unit includes sampling module, signal amplification module, A/D conversion module, control module, wireless transport module, warning device.Leakage current when can realize using the technical program to arrester exception carries out and alarm, and is spread out of alarm signal in time by way of wireless transmission, and convenient for observing the device of discovery in time, arrester deterioration condition is grasped in tracking in time.
Description
Technical field
The present invention relates to live monitoring field, in particular to a kind of three-phase lightning protector leakage currents suitable in switchgear
Wireless monitoring device.
Background technique
With the continuous quickening of extra-high voltage and smart grid pace of construction, resident's power supply quality requires constantly to be promoted, to confession
The requirement of electric reliability is also constantly promoted；Arrester is as an important equipment in operation of power networks, when overvoltage occurs for system
When, by its timely pressure release, to ensure the safe operation of power grid.Meanwhile with live testing technology (such as arrester band
Electrical testing) continuous development and application, just gradually replace traditional routine using the timely discovering device defect of live testing technology
Interruption maintenance operation, this considerably reduce the customary interruption maintenance activity durations, improve working efficiency；Live detection is utilized simultaneously
Technology (such as lightning arrester live-line test) discovering device defect hidden danger, timely arrangement defect elimination can work in time.
Though currently, existing lightning arrester live-line test has been obtained widely carrying out and applied, and good effect is achieved,
But it is mainly for 110kV and above, does not carry out live testing to arrester in 35kV and switchgear below
Work, bursts accident for arrester in a lot of switchgears having occurred and that；The reasons are as folows:
(1) 35kV and following arrester are mounted in switchgear more, less to be mounted directly outdoors；And switchgear is adopted more
With enclosed construction, this is resulted in, and to the arrester progress live testing in switchgear, there are certain difficulties；Meanwhile in switchgear
Space is more narrow, also carrys out some potential safety problems to the work belt of checking experiment personnel.
(2) existing arrester on-Line Monitor Device, using the online prison in arrester bottom end installation leakage current meter
The mode of survey, but this method is not suitable in 35kV and following switchgear, the reason is as follows that: (1) spatial position is limited in switchgear,
It is difficult to that lower on-line monitoring meter is installed；(2) even if being mounted with on-line monitoring meter reluctantly, when overvoltage occurs for system, the table
Meter can be equivalent to a big resistance, will remain biggish residual voltage in system, this is to be difficult to connect in 35kV and electrical voltage system below
It receives；Therefore, traditional on-Line Monitor Device can not be installed in switchgear, and then be unable to monitor the operating condition of arrester,
Increase the interruption maintenance activity duration.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art described above, a kind of three-phase suitable in switchgear is provided
Leakage current of an arrester wireless monitoring device, leakage current when can be realized to arrester exception carries out and alarm, and logical
The mode for crossing wireless transmission spreads out of alarm signal in time, and convenient for observing the device of discovery in time, arrester is grasped in tracking in time
Deterioration condition.
In order to solve the above-mentioned technical problems, the present invention provides a kind of three-phase lightning protectors suitable in switchgear to leak electricity
Flow wireless monitoring device, including current transformer and monitoring unit；The current transformer is connected to the ground connection of three-phase lightning protector
Between line and the monitoring unit；
The monitoring unit includes sampling module, signal amplification module, A/D conversion module, control module, wireless transmission mould
Block, warning device；The sampling module is connected between the current transformer and the signal amplification module, and the A/D turns
Mold changing block is connected between the signal amplification module and control module, and the control module and the wireless transport module are wireless
Connection, the wireless transport module connect the warning device；
When the three-phase lightning protector operates normally, the total current in three-phase current is cancelled out each other, and passes through institute without electric current
Current transformer is stated, sampling module does not collect Leakage Current signal；
When the three-phase lightning protector breaks down, the total current in three-phase current can not cancel out each other balance, Leakage Current
For I ' by current transformer, the sampling module collects representative at this time after the Leakage Current signal of Leakage Current I ' size, will
The Leakage Current signal is sent to the amplifying unit, and the A/D conversion is sent to after the amplifying unit is processed
Module, then it is sent to the control module later through the A/D module processing；The control module includes a comparator,
The comparator makes comparisons Leakage Current size representated by Leakage Current signal at this time with early warning value, if leakage electricity at this time
Stream is more than the early warning value, and the control module sends pre-warning signal to the wireless transport module, the wireless transport module
Pre-warning signal is transmitted to the warning device, shows that three-phase lightning protector is in malfunction at this time.
In a preferred embodiment, the control module is wirelessly connected with the wireless transport module by bluetooth realization
It connects.
In a preferred embodiment, the current transformer is specifically a punching current transformer.
In a preferred embodiment, the monitoring unit is set to the outside of switchgear.
Compared to the prior art, technical solution of the present invention have it is following the utility model has the advantages that
The present invention provides a kind of three-phase lightning protector leakage current wireless monitoring device suitable in switchgear, passes through setting
Monitoring unit outside switchgear, which is realized, carries out real-time monitoring and alarm to arrester exception leakage current, overcomes switchgear
Too small the problem of can not installing on-line monitoring meter；Also, alarm signal is spread out of in time by way of wireless transmission, is convenient for
Backstage personnel observe and find the problem in time, and the working condition and deterioration condition of arrester are grasped in tracking in time.
Detailed description of the invention
Fig. 1 is the three-phase lightning protector leakage current wireless monitoring device being suitable in switchgear in the preferred embodiment of the present invention
Current transformer and three-phase lightning protector connection schematic diagram；
Fig. 2 is the three-phase lightning protector leakage current wireless monitoring device being suitable in switchgear in the preferred embodiment of the present invention
Three-phase lightning protector current trend schematic diagram.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
A kind of three-phase lightning protector leakage current wireless monitoring device suitable in switchgear, specifically includes current transformer
And monitoring unit 1；With reference to Fig. 1, the current transformer be connected to three-phase lightning protector ground line and the monitoring unit 1 it
Between；In the present embodiment, the current transformer is specifically punching current transformer, can also use other current transformers,
Belong to simple replacement, this does not limit the scope of protection of the present invention.
Specifically, the monitoring unit 1 include sampling module, signal amplification module, A/D conversion module, control module,
Wireless transport module, warning device；Connection relationship between them are as follows: the sampling module be connected to the current transformer with
Between the signal amplification module, the A/D conversion module is connected between the signal amplification module and control module, described
Control module and the wireless transport module are wirelessly connected, and the wireless transport module connects the warning device；In this implementation
In example, the control module and the wireless transport module are realized by bluetooth and are wirelessly connected, and can also wirelessly be connected by other
The mode of connecing realizes the connection of wireless transport module and control module, belongs to simple replacement, and protection of the invention cannot be limited with this
Range.The present invention, which will mainly solve, can not install on-line monitoring meter because switchgear is too small, then cannot achieve real-time online
The problem of monitoring, so monitoring unit provided by the invention 1 is specifically set to the outside of switchgear.
Monitoring process is introduced in detail below, with reference to Fig. 2, by taking the A phase in three-phase current as an example:
When the three-phase lightning protector operates normally, the total current in three-phase current is cancelled out each other, and specifically, is only left
Small triple harmonic current, electric current can almost be thought to be zero；There is no electric current by the current transformer, sampling module does not have
Collect Leakage Current signal；
When the three-phase lightning protector breaks down, the total current in three-phase current can not cancel out each other balance, Leakage Current
I ' increase, at this time the leakage current of three-phase lightning protector will not rebalancing, Leakage Current I ' significantly increased by current transformer, institute
It states sampling module and collects representative at this time after the Leakage Current signal of Leakage Current I ' size, the Leakage Current signal is sent
To the amplifying unit, it is sent to the A/D conversion module after the amplifying unit is processed, then is converted through the A/D
Resume module is sent to the control module later；The control module includes a comparator, and the comparator is by letting out at this time
Leakage Current size representated by dew current signal is made comparisons with early warning value, if Leakage Current is more than the early warning value, institute at this time
It states control module and sends pre-warning signal to the wireless transport module, the wireless transport module transmits pre-warning signal to the report
Alarm device shows that three-phase lightning protector is in malfunction at this time.
The present invention provides a kind of three-phase lightning protector leakage current wireless monitoring device suitable in switchgear, passes through setting
Monitoring unit 1 outside switchgear, which is realized, carries out real-time monitoring and alarm to arrester exception leakage current, overcomes switch
Cabinet is too small can not to install the problem of monitoring meter on-line；Also, alarm signal is spread out of in time by way of wireless transmission, just
It observes and finds the problem in time in backstage personnel, the working condition and deterioration condition of arrester are grasped in tracking in time.
The foregoing is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited to this,
Anyone skilled in the art in the technical scope disclosed by the present invention, using this design carries out the present invention non-
Substantive change belongs to the behavior for invading the scope of the present invention.
Claims (4)
1. a kind of three-phase lightning protector leakage current wireless monitoring device suitable in switchgear, it is characterised in that mutual including electric current
Sensor and monitoring unit；The current transformer is connected between the ground line of three-phase lightning protector and the monitoring unit；
The monitoring unit include sampling module, signal amplification module, A/D conversion module, control module, wireless transport module,
Warning device；The sampling module is connected between the current transformer and the signal amplification module, the A/D modulus of conversion
Block is connected between the signal amplification module and control module, and the control module wirelessly connects with the wireless transport module
It connects, the wireless transport module connects the warning device；
When the three-phase lightning protector operates normally, the total current in three-phase current is cancelled out each other, and passes through the electricity without electric current
Current transformer, sampling module do not collect Leakage Current signal；
When the three-phase lightning protector breaks down, the total current in three-phase current can not cancel out each other balance, and Leakage Current I ' is logical
Overcurrent mutual inductor, the sampling module collect representative at this time after the Leakage Current signal of Leakage Current I ' size, will be described
Leakage Current signal is sent to the amplifying unit, is sent to the A/D conversion module after the amplifying unit is processed,
It is sent to the control module later through the A/D module processing again；The control module includes a comparator, the ratio
Leakage Current size representated by Leakage Current signal at this time is made comparisons with early warning value compared with device, if Leakage Current is more than at this time
The early warning value, the control module send pre-warning signal to the wireless transport module, and the wireless transport module transmission is pre-
Alert signal shows that three-phase lightning protector is in malfunction at this time to the warning device.
2. the three-phase lightning protector leakage current wireless monitoring device according to claim 1 suitable in switchgear, special
Sign is that the control module and the wireless transport module are realized by bluetooth and be wirelessly connected.
3. the three-phase lightning protector leakage current wireless monitoring device according to claim 1 suitable in switchgear, special
Sign is that the current transformer is specifically a punching current transformer.
4. the three-phase lightning protector leakage current wireless monitoring device according to claim 1 suitable in switchgear, special
Sign is that the monitoring unit is set to the outside of switchgear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607565.4A CN109030924A (en) | 2018-06-13 | 2018-06-13 | Suitable for the three-phase lightning protector leakage current wireless monitoring device in switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607565.4A CN109030924A (en) | 2018-06-13 | 2018-06-13 | Suitable for the three-phase lightning protector leakage current wireless monitoring device in switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109030924A true CN109030924A (en) | 2018-12-18 |
Family
ID=64609541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810607565.4A Pending CN109030924A (en) | 2018-06-13 | 2018-06-13 | Suitable for the three-phase lightning protector leakage current wireless monitoring device in switchgear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109030924A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578311A (en) * | 2020-12-01 | 2021-03-30 | 国网山东省电力公司电力科学研究院 | Lightning arrester leakage current detection device and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1740801A (en) * | 2005-09-22 | 2006-03-01 | 南京伏安电力设备有限公司 | Three-phase lightning protector early fault on-line monitoring method and apparatus thereof |
| CN102012449A (en) * | 2010-11-01 | 2011-04-13 | 铜川供电局 | Wireless on-line monitoring system for zinc oxide lightning arrester of electric transmission line |
| CN202159104U (en) * | 2011-07-01 | 2012-03-07 | 南京卓实电气有限责任公司 | Metal oxide lightning arrester on-line detection system |
| CN202486229U (en) * | 2012-02-11 | 2012-10-10 | 淄博正瑞电子有限公司 | Lightning arrester on-line monitoring system |
| CN202583309U (en) * | 2012-05-23 | 2012-12-05 | 合肥科鼎电气有限公司 | Intelligent digital zinc oxide lightning arrester on-line monitor |
| CN204807615U (en) * | 2015-07-13 | 2015-11-25 | 国网河南省电力公司检修公司 | Leakage current of an arrester signal pickup assembly |
| CN105372540A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof |
| CN206114790U (en) * | 2016-08-27 | 2017-04-19 | 保定金迪科学仪器有限公司 | Zinc oxide arrester on -line monitoring device |
-
2018
- 2018-06-13 CN CN201810607565.4A patent/CN109030924A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1740801A (en) * | 2005-09-22 | 2006-03-01 | 南京伏安电力设备有限公司 | Three-phase lightning protector early fault on-line monitoring method and apparatus thereof |
| CN102012449A (en) * | 2010-11-01 | 2011-04-13 | 铜川供电局 | Wireless on-line monitoring system for zinc oxide lightning arrester of electric transmission line |
| CN202159104U (en) * | 2011-07-01 | 2012-03-07 | 南京卓实电气有限责任公司 | Metal oxide lightning arrester on-line detection system |
| CN202486229U (en) * | 2012-02-11 | 2012-10-10 | 淄博正瑞电子有限公司 | Lightning arrester on-line monitoring system |
| CN202583309U (en) * | 2012-05-23 | 2012-12-05 | 合肥科鼎电气有限公司 | Intelligent digital zinc oxide lightning arrester on-line monitor |
| CN204807615U (en) * | 2015-07-13 | 2015-11-25 | 国网河南省电力公司检修公司 | Leakage current of an arrester signal pickup assembly |
| CN105372540A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof |
| CN206114790U (en) * | 2016-08-27 | 2017-04-19 | 保定金迪科学仪器有限公司 | Zinc oxide arrester on -line monitoring device |
Non-Patent Citations (1)
| Title |
|---|
| 贾逸梅 等: "在线监测氧化锌避雷器泄漏电流的方法", 《高电压技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578311A (en) * | 2020-12-01 | 2021-03-30 | 国网山东省电力公司电力科学研究院 | Lightning arrester leakage current detection device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203422438U (en) | Real-time monitoring and fault location system for overhead lines of power distribution network | |
| CN203870191U (en) | Low-voltage line fault locating terminal of power distribution area | |
| CN205610353U (en) | Drop out fuse on -line monitoring system | |
| CN103983885A (en) | Low-voltage circuit fault locating terminal and method used for power distribution substation region | |
| CN110389276A (en) | A kind of singlephase earth fault management system and method | |
| CN106443362A (en) | Power distribution network fault detection system | |
| CN207832923U (en) | A kind of distributing monitoring system | |
| CN203398755U (en) | Three-phase earth leakage protection and power-off automatic recovery apparatus | |
| CN205982433U (en) | High -pressure shunt capacitance ware overload protection device who possesses on -line monitoring function | |
| CN206236626U (en) | A kind of Multifunction earth leakage circuit breaker | |
| CN205861815U (en) | The detecting system of Simple Low Voltage power distribution network leakage current | |
| CN103051057B (en) | Condition-based Maintenance of Substation Equipment intelligent management supervisory control system | |
| CN104614603A (en) | On-site protection device status detection system and detection method thereof | |
| CN107302268B (en) | Monitoring system for operating environment around distribution room | |
| CN109030924A (en) | Suitable for the three-phase lightning protector leakage current wireless monitoring device in switchgear | |
| CN203241464U (en) | Current measurement device for lightning arresters and capacitive devices | |
| CN201066671Y (en) | Monitoring residual current action protection relay | |
| CN108020737A (en) | A kind of distribution line monitoring method | |
| CN202794326U (en) | Online monitoring device for grounding current of transformer core | |
| CN204091111U (en) | Early-warning for high pressure insulating boot | |
| CN104020393B (en) | A kind of with electrical network one-phase short-circuit current Fault Locating Method | |
| CN202940644U (en) | Intelligent management and monitoring system for substation equipment state maintenance | |
| CN202710647U (en) | Monitoring device for direct current system | |
| CN204575769U (en) | Secondary current loop of transforming plant state on_line monitoring system | |
| CN104678756A (en) | Novel intelligent comprehensive power transformation and distribution monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181218 |