CN109613419A - Shield voltage limiter monitors system - Google Patents
Shield voltage limiter monitors system Download PDFInfo
- Publication number
- CN109613419A CN109613419A CN201910064481.5A CN201910064481A CN109613419A CN 109613419 A CN109613419 A CN 109613419A CN 201910064481 A CN201910064481 A CN 201910064481A CN 109613419 A CN109613419 A CN 109613419A
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- CN
- China
- Prior art keywords
- current
- voltage limiter
- shield voltage
- current detecting
- ied
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2827—Testing of electronic protection circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention provides it is a kind of can centralization, whether the shield voltage limiter of failure monitors system to real-time monitoring cable sheath voltage limitator.Pass through the system, total current and current in resistance property are acquired in real time in the ground terminal series-connected current sensors of shield voltage limiter, signal amplification, filtering, analog-to-digital conversion are completed using current detecting IED unit, and the information of whole current detecting IED units is received by main IED unit and/or monitoring host computer, to form result information by comprehensive analysis.Through the invention, it solves the problems, such as to be easy to cause property loss or personal safety not in time by manual inspection discovery shield voltage limiter failure in the related technology, improves the safety and stability of railway traction power supply system.
Description
Technical field
The present invention relates to railway traction power supply system technical fields, and in particular to one kind is able to detect Zinc-oxide piezoresistor
The total current of (or zinc oxide valve plate) and the shield voltage limiter of current in resistance property monitor system.
Background technique
Cable sheath voltage limitator generallys use Zinc-oxide piezoresistor or zinc oxide valve plate as protection element at present,
In During Process of Long-term Operation, insulation performance is caused gradually to drop due to the poorly sealed cause internal wetted of device structure or valve block aging
It is low.In this case, the total current of equipment and current in resistance property can obviously increase.In addition, in overvoltage or power frequency short circuit, it can
Lead to zinc oxide valve plate thermal runaway and damages.
In normal operation, whether can only there are crack or periodically examination by simple visual examination, such as insulator decontamination, surface
It tests and carrys out maintenance cable shield voltage limiter.This test mode is difficult to find cable sheath voltage limitator failure in time；If
The cable sheath voltage limitator that cannot find and replace in time failure will lead to cable run scaling loss, and can be because losing cable
The protection of shield voltage limiter and threat is brought to the personal safety of operation maintenance personnel.
Summary of the invention
Present invention aim to address the above problems, and providing one kind being capable of centralization, real-time monitoring cable sheath voltage limit
Whether the shield voltage limiter of failure monitors system to device processed.
To achieve the above object, shield voltage limiter monitoring system provided by the invention includes current sensor and electric current
IED (intelligent electronic device) unit is detected, the current sensor is connect by cable with the current detecting IED unit；Its
In, the current sensor is used to be connected in series in the ground terminal of shield voltage limiter；The current detecting IED unit it is defeated
Outlet is provided with communication line, and the communication line is used for and main IED unit and/or monitoring host computer communication connection.
The present invention acquires total current and current in resistance property in the ground terminal series-connected current sensors of shield voltage limiter in real time,
Signal amplification, filtering, analog-to-digital conversion are completed using current detecting IED unit, is output to main IED unit, and by main IED unit
And/or monitoring host computer receives the information of whole current detecting IED units, to pass through comprehensive analysis, after forming result information, feedback
To state display device.Through the invention, it solves in the related technology through manual inspection discovery shield voltage limiter failure
The problem of being easy to cause property loss or personal safety not in time improves the safety of railway traction power supply system and steady
It is qualitative.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the shield voltage limiter monitoring system of the embodiment of the present invention；
Fig. 2 is the circuit structure block diagram of the main IED unit of the embodiment of the present invention；
In figure:
1 --- shield voltage limiter；
2 --- current sensor；
3 --- current detecting IED unit；
3.1 --- signal amplifier；
3.2 --- filter；
3.3 --- A/D converter；
4 --- communication network；
5 --- main IED unit；
6 --- monitoring host computer；
7 --- state display device.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Shield voltage limiter monitoring system as shown in Figure 1, including it is connected in series in 1 ground terminal of shield voltage limiter
Current sensor 2, current sensor 2 has a current detecting IED unit 3 by cable connection, and current detecting IED unit 3 exports
End is connected with communication network 4, and communication network 4 is connected to main IED unit 5, and main IED unit 5 is exported respectively to monitoring host computer 6 and shape
State display device 7.Communication network 4 includes process-level network between current detecting IED unit and main IED unit and main IED mono-
Station level network between member and monitoring host computer 6.
As shown in fig.2, current detecting IED unit 3 includes signal amplifier 3.1, the filter 3.2 being sequentially connected in series
With A/D converter 3.3.
Preferably, RS-485 serial ports and ethernet interface, current detecting IED are provided on current detecting IED unit 3
Unit input terminal connects current sensor by RS-485 serial ports, and output end is connected to main IED unit 5 by Ethernet interface.
To monitoring host computer 6 and state display device 7, monitoring host computer 6 is connected with display and data storage for the main output of IED unit 5.
With continued reference to Fig. 2, optionally, in the case where the quantity of shield voltage limiter 1 is multiple, each shield voltage
The ground terminal of limiter 1 is connected a current sensor 2.
Optionally, current sensor 2 includes but is not limited to following one: electromagnetic current transducer, electronic current are mutual
Sensor.
Shield voltage limiter total current under continuous running voltage is collectively constituted by capacity current and current in resistance property, wherein
Resistive leakage current only accounts for circuital 10%~20%.Whether increase conduct by current in resistance property under monitoring normal operating voltage
Judgment basis, 1. the fundamental wave component of current in resistance property increases larger, when the content of harmonic wave increases unobvious, normally behaves as filthy tight
Weight or dampness；2. the content growth of current in resistance property harmonic wave is larger, when fundamental wave component increases unobvious, aging is normally behaved as；③
Uniformly when deterioration, capacity current does not change；When uneven deterioration, capacity current increases.In conjunction with longitudinal direction (identical product), cross
Compare to (same to producer, same to batch) and comprehensive (disturbing factor), can judge shield voltage limiter operating condition.Current in resistance property
Measurement range is 1 μ A~1mA, and total current measurement range is 1 μ A~2mA.
Current sensor 2 is connected in series in shield voltage limiter 1 (with Zinc-oxide piezoresistor or zinc oxide by the present invention
For valve block) ground terminal, the total current and current in resistance property of real-time monitoring Zinc-oxide piezoresistor or zinc oxide valve plate, and pass through
After signal enhanced processing, signal filtering processing, analog-to-digital conversion process, by communication network transmission to main IED unit 5, main IED is mono-
The completions such as microprocessor module, digital signal processing module in member 5 collect current monitoring data and make " operational reliability "
Result information, export to monitoring host computer 6 and state display device 7, can realize the prediction of 1 state of shield voltage limiter rapidly
And judgement, and the judgement of equipment state can be completed by corresponding expert diagnostic system preset in monitoring host computer 6, realizing will
The total current and current in resistance property and timing acquired in real time is stored into memory；In the display real-time display total current and
Current in resistance property can also inquire the event of transfiniting and historical data, provide reference information to operation and maintenance personnel；State display device
7 are equipped with " red " " green " " Huang " indicator light, show " failure ", " work ", " inoperative " state of shield voltage limiter 1 respectively,
Effectively prevention cable scaling loss and the injury to maintenance personnel.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of shield voltage limiter monitors system, characterized by comprising: current sensor and current detecting smart electronics
Equipment IED unit, the current sensor are connect by cable with the current detecting IED unit；Wherein,
The current sensor is used to be connected in series in the ground terminal of shield voltage limiter；
The output end of the current detecting IED unit is provided with communication line, the communication line be used for main IED unit and/
Or monitoring host computer communication connection.
2. system according to claim 1, which is characterized in that the shield voltage limiter is connected in series in cable sheath
Between ground terminal, the shield voltage limiter includes: Zinc-oxide piezoresistor or zinc oxide valve plate.
3. system according to claim 1, which is characterized in that the current detecting IED unit includes being sequentially connected in series
Signal amplifier, filter and A/D converter.
4. system according to claim 1, which is characterized in that be provided with RS-485 string on the current detecting IED unit
Mouth and ethernet interface；Wherein,
The input terminal of the current detecting IED unit is connect by the RS-485 serial ports with the current sensor；
The output end of the current detecting IED unit passes through the Ethernet interface and the main IED unit and/or monitoring host computer
Communication connection.
5. system according to claim 1, which is characterized in that the current detecting IED unit is parallel with status display dress
It sets.
6. system according to claim 1, which is characterized in that the shield voltage limiter quantity be multiple feelings
Under condition, the ground terminal of each shield voltage limiter is connected the current sensor.
7. system according to claim 1, which is characterized in that the current sensor includes following one: electromagnetic type electricity
Current transformer, electronic current mutual inductor.
8. system according to claim 1, which is characterized in that be equipped with microprocessor module, number letter inside the main IED
Number processing module, power module and communication module.
9. system according to claim 1, which is characterized in that the monitoring host computer is connected with display and data storage
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910064481.5A CN109613419A (en) | 2019-01-23 | 2019-01-23 | Shield voltage limiter monitors system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910064481.5A CN109613419A (en) | 2019-01-23 | 2019-01-23 | Shield voltage limiter monitors system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109613419A true CN109613419A (en) | 2019-04-12 |
Family
ID=66018158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910064481.5A Pending CN109613419A (en) | 2019-01-23 | 2019-01-23 | Shield voltage limiter monitors system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109613419A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113189390A (en) * | 2021-04-23 | 2021-07-30 | 中铁第四勘察设计院集团有限公司 | Centralized high-voltage cable sheath protection box |
| EP4067916A1 (en) * | 2021-03-29 | 2022-10-05 | Nexans | Sheath voltage limiter (svl) integrity monitoring |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411084A (en) * | 2011-07-26 | 2012-04-11 | 东北电力科学研究院有限公司 | Online monitoring device and method of grounding current of iron core of transformer |
| CN202421376U (en) * | 2011-12-30 | 2012-09-05 | 中铁第四勘察设计院集团有限公司 | Cable protective layer protector detecting device |
| CN103389408A (en) * | 2013-07-16 | 2013-11-13 | 国家电网公司 | High-voltage single-core cable sheath grounding current on-line monitoring device and control method |
| CN103941161A (en) * | 2014-05-12 | 2014-07-23 | 国家电网公司 | On-line monitoring system for current and carrying capacity of cable sheath |
| CN104714128A (en) * | 2015-02-26 | 2015-06-17 | 南京南瑞继保电气有限公司 | Online arrester monitoring system |
-
2019
- 2019-01-23 CN CN201910064481.5A patent/CN109613419A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411084A (en) * | 2011-07-26 | 2012-04-11 | 东北电力科学研究院有限公司 | Online monitoring device and method of grounding current of iron core of transformer |
| CN202421376U (en) * | 2011-12-30 | 2012-09-05 | 中铁第四勘察设计院集团有限公司 | Cable protective layer protector detecting device |
| CN103389408A (en) * | 2013-07-16 | 2013-11-13 | 国家电网公司 | High-voltage single-core cable sheath grounding current on-line monitoring device and control method |
| CN103941161A (en) * | 2014-05-12 | 2014-07-23 | 国家电网公司 | On-line monitoring system for current and carrying capacity of cable sheath |
| CN104714128A (en) * | 2015-02-26 | 2015-06-17 | 南京南瑞继保电气有限公司 | Online arrester monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4067916A1 (en) * | 2021-03-29 | 2022-10-05 | Nexans | Sheath voltage limiter (svl) integrity monitoring |
| CN113189390A (en) * | 2021-04-23 | 2021-07-30 | 中铁第四勘察设计院集团有限公司 | Centralized high-voltage cable sheath protection box |
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Application publication date: 20190412 |
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