CN105676034B - A kind of switchgear heater failure on-line monitoring method - Google Patents
A kind of switchgear heater failure on-line monitoring method Download PDFInfo
- Publication number
- CN105676034B CN105676034B CN201610119013.XA CN201610119013A CN105676034B CN 105676034 B CN105676034 B CN 105676034B CN 201610119013 A CN201610119013 A CN 201610119013A CN 105676034 B CN105676034 B CN 105676034B
- Authority
- CN
- China
- Prior art keywords
- voltage
- heater
- rogowski coil
- current transformer
- current
- 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.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005070 sampling Methods 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 abstract description 2
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000003862 health status Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- 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
Abstract
The present invention relates to a kind of switchgear heater failure on-line monitoring methods, the invention is using Rogowski coil type current transformer as core, the electric current that heater is monitored by Rogowski coil current transformer, secondary small voltage is transformed to by heater primary current, to obtain the current signal of heater work；By miniature transformer and rectification module, heater operating voltage is converted into secondary direct current small voltage, to obtain heater operating voltage signal, while the voltage is as subsequent conditioning circuit power supply；By voltage and current signal integrated treatment, LED diode displayings are used in combination, to reflect heater work, failure two states, solve the problems, such as that switchgear internal heater malfunction monitoring is difficult.
Description
Technical field
The invention belongs to power transformation operation fields, are related to switchgear, especially a kind of switchgear heater failure on-line monitoring
Method.
Background technology
Power switch cabinet is transmission, distributes the important electric power facility of electric energy, and stability directly affects grid stability
And power supply reliability.When switch cabinet humidity is excessively high, serious consequence can be caused.Currently, control humiture in switchgear
Method is mostly to dehumidify and heat using heater, controls and automatically adjusts by intelligent temperature and humidity controller.
It is compact-sized in power switch cabinet, the power equipments such as breaker, arrester, mutual inductor and protective device are integrated with,
It is harsh to humiture environmental requirement in cabinet, therefore environment in cabinet is adjusted using heater.However, inside switch cabinet electromagnetism
Environment is complicated, and heater and Intelligent humiture controller often break down, and temperature and humidity controller does not have monitoring heater
Whether the function of failure；Since, in the presence of Keep Clear-High Voltage, common tour cannot open cabinet door and check heater in switchgear,
Therefore it is difficult to find heater failure, long-time humiture can influence the normal operation of electrical equipment in cabinet extremely in switchgear,
It is serious or even cause gliding spark discharge, cause power outage.
Invention content
It is a kind of easy for installation it is an object of the invention in place of overcome the deficiencies in the prior art, provide, former heating is not influenced
The normal work of device, can instruction heater whether failure, facilitate operation maintenance personnel make an inspection tour, ensure switchgear health fault-free fortune
Capable transformer substation switch heater counter on-line monitoring method.
The technical proposal for solving the technical problem of the invention is：
The power circuit for switching heater counter is passed through Rogowski coil by a kind of switchgear heater failure on-line monitoring method
Current transformer surveys rectification module in parallel in Current Transformer Secondary, and rectification module is sequentially connected smoothing capacitor, sampling electricity
Resistance, work indication light diode, using sampling resistor both end voltage as the output voltage VI of Rogowski coil current transformer；
Miniature transformer and its rectification module in parallel, miniature transformer and rectification module connect on heater working power line
Connect a voltage comparator circuit, miniature transformer and rectification module and heater operating voltage be converted into 5V DC voltages, and by this
Supply voltage of the voltage as voltage comparator circuit, an adjustable resistance in parallel after direct voltage output, as threshold reference electricity
Press Vset；
The output voltage VI and threshold reference voltage Vset of Rogowski coil current transformer are inputted in comparison circuit, works as sieve
When the output voltage of family name's coil current mutual inductor is more than threshold reference voltage, judgement heater normal work；When Roche line
When the output voltage of loop current mutual inductor is less than threshold reference voltage, judge that heater failure, fault-signal pass through work
Indication light diode is shown.
Moreover, the Rogowski coil current transformer is straight-through current transformer, former operating circuit is not interrupted.
The present invention monitors heater using Rogowski coil type current transformer as core, by Rogowski coil current transformer
Heater primary current is transformed to secondary small voltage by electric current, to monitor the current value of heater；By miniature transformer and
Heater operating voltage is converted to secondary direct current small voltage by rectification module；By voltage and current signal integrated treatment, to anti-
Reflect heater work, failure two states.Solve the problems, such as that the internal heaters such as switchgear, terminal box malfunction monitoring is difficult.
(1) current monitoring
Rogowski coil is made of the copper conductor being surrounded on annular nonmagnetic material skeleton, constitutes the centre path current of annular
Mutual inductor, due to the particularity of magnetic core, which is also not present electric current phenomena such as there is no non-linear, magnetic saturation
The secondary tripping hazard of mutual inductor.The theory structure of Rogowski coil current sensor is as shown in Fig. 1.Including non magnetic annular bone
Frame, and the secondary coil that is looped around on skeleton.
When current carrying conductor of heater is passed through from coil ring heart, magnetic field B will be generated around conductor, according to Ampere ring road
Theorem, conductor ambient magnetic field strength B are proportional to the electric current I in current－carrying conductorN。
We assume that the skeleton across Rogowski coil of the field homogeneity around conductor, and secondary coil is uniformly distributed
On skeleton.
According to the law of electromagnetic induction, the induced electromotive force that secondary coil generates is proportional to the electric current in a current－carrying conductor.
It is I when flowing through root-mean-square value in primary side current－carrying conductorNSinusoidal current when, the output voltage root-mean-square valve of Rogowski coil is：
E=ω MIN
Wherein：E is the output voltage root-mean-square value of Rogowski coil
The π of ω=2 f=314rad/s are power-frequency voltage circular frequency；
M is the mutual inductance of Rogowski coil.
INFor current effective value in a current－carrying conductor.
After carrying out rectification to Rogowski coil current transformer secondary side current, sampling resistor in parallel passes through sampling resistor two
Terminal voltage just can reflect the electric current in Rogowski coil center conductor, the i.e. operating current of heater, current monitoring schematic diagram
Such as attached drawing 1.
(2) current and voltage signals integrated treatment：
By miniature transformer and rectification module, heater operating voltage is converted into 5V DC voltages, this voltage is made
For the supply voltage of signal processing circuit.When secondary side has voltage, judgement heater source voltage exists.
Design threshold voltages comparison circuit, when the output voltage of Rogowski coil is more than threshold voltage, judgement heating
Device works normally；When the output voltage of Rogowski coil is less than threshold voltage, heater failure is judged.Current and voltage signals
Integrated treatment circuit diagram such as attached drawing 2.Current Voltage integrated treatment logic chart is as shown in Figure 3.
The advantages and positive effects of the present invention are：
1, present method solves operation maintenance personnels makes an inspection tour the big problem of difficulty to terminal box internal heater, effectively monitors switch
The health status of cabinet internal heater avoids second short circuit caused by due to condensation or even major accident in switchgear from occurring.
2, this method principle is simple, does not influence the normal work of former heater.Can instruction heater work, failure, stop
With three kinds of states, operation maintenance personnel tour is facilitated, has ensured the trouble-free operation of switchgear health.
Description of the drawings
Fig. 1 is acquisition principle figure of the Rogowski coil to electric current in conductor；
Fig. 2 is current and voltage signals integrated treatment circuit diagram；
Fig. 3 monitors system logic schematic diagram；
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings and by specific embodiment, and following embodiment is descriptive
, it is not restrictive, protection scope of the present invention cannot be limited with this.
A kind of switchgear internal heater on-line monitoring method heats Rogowski coil current transformer 1 mounted on switchgear
On the power circuit 2 of device, i.e., power circuit is passed through into current transformer.Rectification module 3 in parallel is surveyed in Current Transformer Secondary,
Connect smoothing capacitor 4 and sampling resistor 5 and work indication light diode 6 behind rectification module, and by sampling resistor two
Output voltage VI of the terminal voltage as Rogowski coil current transformer.
Miniature transformer and its rectification module 7 in parallel, heater operating voltage is converted on heater working power line
For 5V DC voltages.Using this voltage as the supply voltage of threshold voltage comparison circuit 8, and the adjustable electric in parallel after voltage output
Resistance 9, as threshold reference voltage Vset.Comparison circuit inputs the output voltage V of Rogowski coilIAnd threshold reference voltage Vset,
When Rogowski coil output voltage is more than threshold voltage, judgement heater normal work；When the output voltage of Rogowski coil
When less than threshold voltage, heater failure is judged.Fault-signal is shown by the indication light diode 10 that works.
This method converts the operating current of heater using current transformer, and is drawn from heater working power
Energy is taken, indication light diode and the bright and dark judgement heater work for the indication light diode that works, the failure of working are passed through
Two states.To effectively monitor the health status of heater, the hair to cause a serious accident by condensation in switchgear is avoided
It is raw.
The on-line fault monitoring device does not influence the normal operation of former heater there are when failure.
The present invention passes through laboratory test, complies fully with《State Grid Corporation of China's electric power safety working regulation (power transformation part)》
In requirement, can apply at the scene.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, under the premise of not departing from inventive concept, various modifications and improvements can be made, these belong to the protection of the present invention
Range.
Claims (2)
1. a kind of switchgear heater failure on-line monitoring method, it is characterised in that：The power circuit for switching heater counter is worn
Rogowski coil current transformer is crossed, in Current Transformer Secondary side parallel connection rectification module, rectification module is sequentially connected flat wave capacitor
Device, sampling resistor, work indication light diode, using sampling resistor both end voltage as the output of Rogowski coil current transformer
Voltage VI；
Miniature transformer and its rectification module in parallel on heater working power line, miniature transformer and rectification module connection one
Heater operating voltage is converted to 5V DC voltages by voltage comparator circuit, miniature transformer and rectification module, and by this voltage
As the supply voltage of voltage comparator circuit, an adjustable resistance in parallel after direct voltage output, as threshold reference voltage
Vset；
The output voltage VI and threshold reference voltage Vset of Rogowski coil current transformer are inputted in comparison circuit, when Roche line
When the output voltage of loop current mutual inductor is more than threshold reference voltage, judgement heater normal work；When Rogowski coil electricity
When the output voltage of current transformer is less than threshold reference voltage, judge that heater failure, fault-signal are indicated by working
Diode displaying.
2. a kind of switchgear heater failure on-line monitoring method according to claim 1, it is characterised in that：Rogowski coil
Current transformer is straight-through current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119013.XA CN105676034B (en) | 2016-03-02 | 2016-03-02 | A kind of switchgear heater failure on-line monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119013.XA CN105676034B (en) | 2016-03-02 | 2016-03-02 | A kind of switchgear heater failure on-line monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105676034A CN105676034A (en) | 2016-06-15 |
| CN105676034B true CN105676034B (en) | 2018-08-31 |
Family
ID=56307780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610119013.XA Active CN105676034B (en) | 2016-03-02 | 2016-03-02 | A kind of switchgear heater failure on-line monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105676034B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106980064A (en) * | 2017-05-11 | 2017-07-25 | 沈阳恒久安泰环保与节能科技有限公司 | The online failure detector of solid heat storage boiler heating module |
| CN113063999B (en) * | 2021-03-11 | 2023-08-18 | 北京北方华创微电子装备有限公司 | Method and system for diagnosing heater in semiconductor process equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622015A (en) * | 2012-03-30 | 2012-08-01 | 苏州苏海亚电气有限公司 | Condensation controller |
| CN202586512U (en) * | 2012-03-16 | 2012-12-05 | 刘春元 | Induction power-taking unit for illuminating lamps |
| CN202904409U (en) * | 2012-11-28 | 2013-04-24 | 重庆市电力公司检修分公司 | Monitoring device for transformer station terminal box heater |
| CN103645395A (en) * | 2013-11-15 | 2014-03-19 | 四川圣维信息技术有限公司 | Isolation and protection circuit for high-voltage live-line monitoring |
| CN104237604A (en) * | 2014-08-28 | 2014-12-24 | 国家电网公司 | Current monitoring warning device for overhead transmission line |
| CN105203833A (en) * | 2015-11-09 | 2015-12-30 | 国家电网公司 | High-voltage electrical equipment high-current impulse counting device and counting method |
| CN105203872A (en) * | 2015-09-10 | 2015-12-30 | 国网天津市电力公司 | Substation terminal box heater monitoring method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0658960A (en) * | 1992-08-04 | 1994-03-04 | Central Res Inst Of Electric Power Ind | Power line measuring apparatus |
-
2016
- 2016-03-02 CN CN201610119013.XA patent/CN105676034B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202586512U (en) * | 2012-03-16 | 2012-12-05 | 刘春元 | Induction power-taking unit for illuminating lamps |
| CN102622015A (en) * | 2012-03-30 | 2012-08-01 | 苏州苏海亚电气有限公司 | Condensation controller |
| CN202904409U (en) * | 2012-11-28 | 2013-04-24 | 重庆市电力公司检修分公司 | Monitoring device for transformer station terminal box heater |
| CN103645395A (en) * | 2013-11-15 | 2014-03-19 | 四川圣维信息技术有限公司 | Isolation and protection circuit for high-voltage live-line monitoring |
| CN104237604A (en) * | 2014-08-28 | 2014-12-24 | 国家电网公司 | Current monitoring warning device for overhead transmission line |
| CN105203872A (en) * | 2015-09-10 | 2015-12-30 | 国网天津市电力公司 | Substation terminal box heater monitoring method |
| CN105203833A (en) * | 2015-11-09 | 2015-12-30 | 国家电网公司 | High-voltage electrical equipment high-current impulse counting device and counting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105676034A (en) | 2016-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110348354B (en) | Power utilization load identification system, method and dormitory power utilization management system | |
| CN205982461U (en) | Low -voltage distribution is electric detection means for cabinet | |
| CN106940391B (en) | Threephase current transformer no-load voltage ratio on-line conversion intelligent controller | |
| CN105676034B (en) | A kind of switchgear heater failure on-line monitoring method | |
| CN106526394B (en) | Iron core local temperature rise pilot system and method under short trouble between rewinding material piece | |
| CN111030312A (en) | High-voltage bus induction electricity taking device and method | |
| CN208384025U (en) | A kind of test macro of direct-current charging post | |
| CN205898968U (en) | Electronic relay coil overload detection test bench | |
| CN106771639B (en) | High pressure pole tower ground resistance on-line monitoring system | |
| CN203444008U (en) | High-voltage charge display locking device | |
| CN202260375U (en) | Circuit detection protecting device | |
| CN205507056U (en) | Insulating detector and collection module's off -line tester | |
| CN104158137A (en) | Control system for current circulating ice melting apparatus | |
| CN203911596U (en) | High voltage cable external wireless power supply acquisition device | |
| CN110320821A (en) | Integral type industrial frequency AC Withstand test device control system | |
| CN205427073U (en) | Cubical switchboard heater trouble on -line monitoring device | |
| CN203838279U (en) | Heater line breakage alarm circuit | |
| CN205195244U (en) | A safe combined floodgate system for 10kV reducing transformer | |
| CN104183379A (en) | Connecting device for maintenance of secondary side of electric power current transformer | |
| CN104158296B (en) | An Aftercurrent protecting equipment distant place based on network technology management system | |
| CN207638172U (en) | A kind of intelligent power distribution equipment | |
| CN202693726U (en) | Detection circuit and detection system for electric transmission and transformation equipment | |
| CN207992331U (en) | A kind of transformer testing tooling | |
| CN207424155U (en) | Power failure detection device | |
| CN105203872A (en) | Substation terminal box heater monitoring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |