CN106707011A - Power grid bus overcurrent detection method and system - Google Patents
Power grid bus overcurrent detection method and system Download PDFInfo
- Publication number
- CN106707011A CN106707011A CN201710017103.2A CN201710017103A CN106707011A CN 106707011 A CN106707011 A CN 106707011A CN 201710017103 A CN201710017103 A CN 201710017103A CN 106707011 A CN106707011 A CN 106707011A
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- signal
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- power
- bus
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- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/186—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using current transformers with a core consisting of two or more parts, e.g. clamp-on type
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
Provided is a power grid bus overcurrent detection system, comprising a current transformer CT1, a current transformer CT 2, a signal acquisition circuit, a signal amplification circuit, an A/D conversion circuit, a central processor, a GPRS wireless communication module, and a power supply circuit connected with the central processor. The system adopts the current sensors to obtain current signals, has no direct electrical connection with primary equipment and secondary equipment of a power grid, is good in insulation performance and does not influence power grid safety operation, can directly measure and record peak overcurrent under the condition of not changing wiring mode of electrical equipment, has a good electromagnetic compatibility and protection measures, prevents measuring system over-voltage damage, does not introduce thunder and switching overvoltage to other electric equipment and has the advantages of simple structure, convenient installation and low cost.
Description
Technical field
The present invention relates to a kind of real-time grid bus overcurrent detection method and device, more particularly to a kind of power network bus
Overcurrent detection method and system.
Background technology
Power network overcurrent often influences the important hidden danger of transmission line of electricity and Substation Electric Equipment operation safety, to transmission line of electricity
Extreme influence is caused with the safety of electrical equipment, the overcurrent of real-time monitoring transmission of electricity bus realizes the acquisition of operation of power networks state,
It is convenient for crash analysis and insulation of electrical installation coordinates.Transformer station is substantially also in the detection of power network bus overcurrent now
Or used in power plant, yet there are no and apply in unattended mountain area, river and depopulated zone, therefore occur to place
Just lack field operational data during failure, it is extremely disadvantageous to analysis accident.
Therefore being badly in need of a kind of electrical equipment primary connection mode that do not change can just detect whether power network overcurrent was electricity
The method and apparatus of stream.
The content of the invention
In consideration of it, the technical problems to be solved by the invention are to provide one kind does not change electrical equipment primary connection mode just
Can detect power network overcurrent whether be overcurrent method and apparatus, to solve above-mentioned background technology shortcoming.
An object of the present invention is to propose a kind of power network bus overcurrent signal detection method:The second object of the present invention
It is to propose a kind of power network bus overcurrent signal detecting system.
An object of the present invention is achieved through the following technical solutions：
The power network bus overcurrent signal detection method that the present invention is provided, comprises the following steps：
It is described:Current Transmit 1 connect punching between insulated power bus,
It is described:The input of signal acquisition circuit is connected with Current Transmit 1,
It is described；The output end of signal acquisition circuit is connected with signal amplification circuit,
It is described:Signal amplification circuit is connected with A/D change-over circuits,
It is described:A/D change-over circuits are connected with central processing unit,
It is described:RS485 signal outputs are converted into after the Digital Signal Processing that central processing unit will be received wireless to GPRS
Communication module,
It is described:GPRS wireless communication modules launch to terminal wireless receiver RS485 signals,
Further, it is further comprising the steps of:
It is described:Current Transmit 2 connect punching between insulated power bus,
It is described:The input of power circuit is connected with Current Transmit 2,
It is described:The output end of power circuit is connected with central processing unit,
The second object of the present invention is achieved through the following technical solutions:
The power network bus overcurrent detecting system that the present invention is provided, including Current Transmit 1, Current Transmit 2, letter
Number Acquisition Circuit, signal amplification circuit, A/D change-over circuits, central processing unit, GPRS wireless communication modules and central processing unit
The power circuit of connection；
The Current Transmit 1 connects punching between insulated power bus；
The current signal that the Current Transmit 1 will be sensed is exported to signal acquisition circuit, signal acquisition circuit pair
The current signal for receiving carries out overcurrent and overvoltage protection, while also the amplitude to peak point current exceedes given threshold offer report
Alert signal；
The signal amplification circuit is used to be amplified the current signal that signal acquisition circuit is collected；
The analog signal signal that the A/D change-over circuits will be received is converted into data signal；
The A/D change-over circuits export to central processing unit data signal；
The data that the central processing unit will be received are preserved within the storage system；
The data that the central processing unit will be handled well are exported to GPRS wireless communication modules by RS485；
The RS485 output signals that the GPRS wireless communication modules will be received are transmitted into monitoring by wireless transmission method
Receive center；
Further, the input of the power circuit is connected with Current Transmit 2；
The output end of the power circuit is connected with central processing unit, and provides electric power to central processing unit；
The advantage of the invention is that:The present invention obtains overcurrent signal using current sensor, with power network primary equipment
With secondary device without directly electrical connection, good insulation preformance, do not influence electric power netting safe running, do not changing connecing for electrical equipment
Direct measurement record peak value overcurrent, with good electromagnetic compatibility characteristic and safeguard measure, prevented in the case of line mode
Voltage damages measuring system, will not by thunder and lightning and switching overvoltage introduce other electrical equipments and simple structure, it is easy for installation,
The advantage of low cost.
Brief description of the drawings
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
The detailed description of one step, wherein：
Fig. 1 is power network bus overcurrent detection method flow chart provided in an embodiment of the present invention；
Fig. 2 is power network bus overcurrent detecting system structural representation provided in an embodiment of the present invention.
Specific embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail；It should be appreciated that preferred embodiment
Only for the explanation present invention, rather than in order to limit the scope of the invention.
Fig. 1 is power network bus overcurrent detection method flow chart provided in an embodiment of the present invention；As shown in the figure；The present invention is carried
The power network bus overcurrent detection method of confession, comprises the following steps：
It is described:The input of signal acquisition circuit is connected with Current Transmit 1,
It is described；The output end of signal acquisition circuit is connected with signal amplification circuit,
It is described:Signal amplification circuit is connected with A/D change-over circuits,
It is described:A/D change-over circuits are connected with central processing unit,
It is described:RS485 signal outputs are converted into after the Digital Signal Processing that central processing unit will be received wireless to GPRS
Communication module,
It is described:GPRS wireless communication modules launch to terminal wireless receiver RS485 signals,
Further, it is further comprising the steps of:
It is described:Current Transmit 2 connect punching between insulated power bus,
It is described:The input of power circuit is connected with Current Transmit 2,
It is described:The output end of power circuit is connected with central processing unit,
The second object of the present invention is achieved through the following technical solutions:
The power network bus overcurrent detecting system that Fig. 2 is provided for the present invention, including Current Transmit 1, current transformer
CT2, signal acquisition circuit, signal amplification circuit, A/D change-over circuits, central processing unit, GPRS wireless communication modules and center
The power circuit of processor connection；
The Current Transmit 1 connects punching between insulated power bus；
The current signal that the Current Transmit 1 will be sensed is exported to signal acquisition circuit, signal acquisition circuit pair
The current signal for receiving carries out overcurrent and overvoltage protection, while also the amplitude to peak point current exceedes given threshold offer report
Alert signal；
The signal amplification circuit is used to be amplified the current signal that signal acquisition circuit is collected；
The analog signal signal that the A/D change-over circuits will be received is converted into data signal；
The A/D change-over circuits export to central processing unit data signal；
The data that the central processing unit will be received are preserved within the storage system；
The data that the central processing unit will be handled well are exported to GPRS wireless communication modules by RS485；
The RS485 output signals that the GPRS wireless communication modules will be received are transmitted into monitoring by wireless transmission method
Receive center；
Further, the input of the power circuit is connected with Current Transmit 2；
The output end of the power circuit is connected with central processing unit, and provides electric power to central processing unit.
The advantage of the invention is that：The present invention obtains current signal using current sensor, does not have with power network primary equipment
There are direct electrical connection, good insulation preformance, do not influence electric power netting safe running, do not changing the primary connection mode of electrical equipment
In the case of direct measurement record peak value overcurrent, with good electromagnetic compatibility characteristic and safeguard measure, prevent overvoltage from damaging
Measuring system, it is impossible to which thunder and lightning is introduced into mains system.
The present embodiment uses two current sensors, a current sensor to detect transmission of electricity bus overcurrent, separately
One current sensor obtains electric power needed for system equipment, for equipment provides continuous electric energy, exempts from conventional miscellaneous equipment and adopts so as to ward off
With the battery-powered shortcoming of storing up electricity, thus completely disengage from whole system equipment and coil up directly connecing for line and ground wire with high voltage power transmission
Touch, to greatest extent the safety of protection system equipment.
Transmission of electricity bus installs current transformer part, and outer layer prevents high-tension electricity from being put to current transformer using double layer of insulation
Electricity damages system equipment, and current transformer uses opening mode, thus varies without the structure of transmission of electricity bus, makes the system i.e.
The installation in newly-built transmission line of electricity can be applied, can also be applied in the transmission line of electricity being currently running.
Signal acquisition circuit the present uses 100:1 electric current no-load voltage ratio, it is also possible to the triggering for realizing different electric currents is adjusted by circuit
No-load voltage ratio.
General principle of the invention and principal character and advantages of the present invention, the technology of the industry has been shown and described above
Personnel it should be appreciated that the present invention is not limited to the above embodiments, simply explanation described in above-described embodiment and specification this
The principle of invention, without departing from the spirit and scope of the invention, various changes and modifications of the present invention are possible, and these change and change
Enter to both fall within the range of claimed invention, the claimed scope of the invention is by appending claims and its equivalent circle.
It is fixed.
Claims (1)
1. a kind of power network bus overcurrent detection method and system, it is characterised in that:Including Current Transmit 1, Current Mutual Inductance
Device CT2, signal acquisition circuit, signal amplification circuit, A/D change-over circuits, central processing unit, GPRS wireless communication modules and in
The power circuit of central processor connection；
The Current Transmit 1 connects punching between insulated power bus:
The input of the signal acquisition circuit is connected with Current Transmit 1；
The signal acquisition circuit, is arranged and pressure limiting for receiving the current signal that Current Transmit 1 is collected；
The current signal that the signal amplification circuit will be received is amplified treatment；
The simulation that the signal amplification circuit will receive the signal input after amplification to A/D change-over circuits, A/D change-over circuits
Signal is converted into data signal output to central processing unit；
RS485 signal outputs to GPRS radio communication molds are converted into after the Digital Signal Processing that the central processing unit will be received
Block；
The GPRS wireless communication modules launch to terminal wireless receiver RS485 signals；
The Current Transmit 2 connects punching between insulated power bus:
The input of the power circuit is connected with Current Transmit 2；
The output end of the power circuit is connected with central processing unit；
The Current Transmit 1 is the current transformer based on power network bus, and primary Grid is by isolated bus, current transformer
Constituted with the part of signal acquisition circuit three, power network bus operating current is acted on isolated bus, is then enclosed within outside isolated bus
Current transformer produces output voltage, and the voltage output to signal acquisition circuit is produced after signal amplification circuit enhanced processing
One current output signal of the linear relationship that is directly proportional to power network current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017103.2A CN106707011A (en) | 2017-01-11 | 2017-01-11 | Power grid bus overcurrent detection method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017103.2A CN106707011A (en) | 2017-01-11 | 2017-01-11 | Power grid bus overcurrent detection method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106707011A true CN106707011A (en) | 2017-05-24 |
Family
ID=58907202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710017103.2A Pending CN106707011A (en) | 2017-01-11 | 2017-01-11 | Power grid bus overcurrent detection method and system |
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| CN (1) | CN106707011A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063532A (en) * | 2019-12-06 | 2020-04-24 | 中冶天工集团有限公司 | Current transformer based on wireless communication technology networking |
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| CN102608406A (en) * | 2012-03-21 | 2012-07-25 | 武汉贝连测控技术有限公司 | Electric current monitoring terminal of online monitoring device for capacitive equipment of transformer substation |
| CN102707118A (en) * | 2012-06-14 | 2012-10-03 | 北京恒源利通电力技术有限公司 | Voltage and current mutual inductor and measuring system thereof |
| CN204228890U (en) * | 2014-12-05 | 2015-03-25 | 石家庄开发区中实检测设备有限公司 | Multichannel overhead distribution fault and locating device |
| CN205581188U (en) * | 2016-04-05 | 2016-09-14 | 江苏润圣电气有限公司 | Be total to case generating line electrical parameter on -line monitoring device |
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2017
- 2017-01-11 CN CN201710017103.2A patent/CN106707011A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100049413A (en) * | 2008-11-03 | 2010-05-12 | 현대중공업 주식회사 | Monitoring device for circuit breaker |
| CN102608406A (en) * | 2012-03-21 | 2012-07-25 | 武汉贝连测控技术有限公司 | Electric current monitoring terminal of online monitoring device for capacitive equipment of transformer substation |
| CN102707118A (en) * | 2012-06-14 | 2012-10-03 | 北京恒源利通电力技术有限公司 | Voltage and current mutual inductor and measuring system thereof |
| CN204228890U (en) * | 2014-12-05 | 2015-03-25 | 石家庄开发区中实检测设备有限公司 | Multichannel overhead distribution fault and locating device |
| CN205581188U (en) * | 2016-04-05 | 2016-09-14 | 江苏润圣电气有限公司 | Be total to case generating line electrical parameter on -line monitoring device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063532A (en) * | 2019-12-06 | 2020-04-24 | 中冶天工集团有限公司 | Current transformer based on wireless communication technology networking |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |
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| WD01 | Invention patent application deemed withdrawn after publication |