CN108918951A - A kind of monitoring system of transformer core current - Google Patents
A kind of monitoring system of transformer core current Download PDFInfo
- Publication number
- CN108918951A CN108918951A CN201810965866.4A CN201810965866A CN108918951A CN 108918951 A CN108918951 A CN 108918951A CN 201810965866 A CN201810965866 A CN 201810965866A CN 108918951 A CN108918951 A CN 108918951A
- Authority
- CN
- China
- Prior art keywords
- signal
- current
- control circuit
- circuit
- iron core
- 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.)
- Withdrawn
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a kind of monitoring systems of transformer core current, including Zero flux CT current sensor, the Zero flux CT current sense is mounted at master iron core grounding copper bar, by welding mounting bracket at master iron core grounding copper bar come fixed current sensor, then ground connection is arranged across sensor internal diameter；The current sensor passes sequentially through signal pre-processing circuit and carries out signal conversion, current signal is acquired by Acquisition Circuit again, then signal is transmitted to control circuit, signal is transmitted to storage circuit and stored by control circuit, control circuit connects display simultaneously, is shown signal by display.The current detecting of master iron core is carried out by Zero flux CT current sensor, easy for installation, precisely, by being shown by display circuit to Acquisition Circuit is transmitted to after the Signal Pretreatment conversion detected, storage circuit storage current signal data facilitate monitoring for measurement.
Description
Technical field
The present invention relates to a kind of transformer detection systems, and in particular to a kind of monitoring system of transformer core current.
Background technique
Causing transformer fault has various reasons, and also there are many types for the fault type of transformer.Related money
Defective proportion accounts for the third position of all kinds of failures of transformer caused by material statistics shows because of iron core problem.Therefore, it is necessary to greatest extent
Ground prevents the generation of transformer core failure, accomplishes to find in time, handle in time, to ensure the safe and reliable of entire electric system
Operation.
When power transformer operates normally, iron core must have some reliable grounds.If not being grounded, iron core over the ground outstanding
Floating current potential will cause intermittence disruptive discharge over the ground, and the possibility to form iron core floating potential is eliminated the need for after iron core one point earth.
But when two o'clock or more, which occurs, in iron core to be grounded, the uneven current potential between iron core will form circulation between grounding point, then
It is reflected on ground line and the phenomenon that electric current increases suddenly just occurs.It is hindered according between fault ground point and iron core dead earth point
The difference of anti-size, the size of current on ground line are also different.
Summary of the invention
The technical problem to be solved by the present invention is to：Realize the monitoring to transformer core from electric current, the present invention provides
A kind of monitoring system of the transformer core current to solve the above problems.
The present invention is achieved through the following technical solutions：
A kind of monitoring system of transformer core current, including Zero flux CT current sensor, the Zero flux CT electric current
Sensing is mounted at master iron core grounding copper bar, by welding mounting bracket at master iron core grounding copper bar come fixed current biography
Then sensor arranges ground connection across sensor internal diameter；The current sensor passes sequentially through signal pre-processing circuit and carries out letter
Number conversion, then by Acquisition Circuit acquisition current signal, signal is then transmitted to control circuit, signal is transmitted to and deposits by control circuit
Storage road is stored, while control circuit connects display, is shown signal by display.Pass through Zero flux CT electricity
Flow sensor carries out the current detecting of master iron core, easy for installation, and measurement precisely, passes through the Signal Pretreatment conversion to detecting
After be transmitted to Acquisition Circuit, shown by display circuit, storage circuit store current signal data, facilitate monitoring.
Further, control circuit is connected with RS232 interface, by RS232 interface connect portable computer, by data into
Row is external.External computer is connected by external RS232 interface, facilitates external monitoring.
Further, control circuit carries out signal transmission by CAN bus and the PC machine of distal end main control room.Connect master control
Machine is conveniently monitored.
Further, control circuit connects wireless network module, and the wireless network module is 4G wireless network module.Pass through
4G network module steady signal transmission, speed is fast, convenient long-range monitoring.
The present invention has the advantage that and beneficial effect：
1, the present invention carries out the current detecting of master iron core by Zero flux CT current sensor, easy for installation, measurement essence
Standard, by being shown by display circuit, storage circuit storage electricity to Acquisition Circuit is transmitted to after the Signal Pretreatment conversion detected
Signal data is flowed, monitoring is facilitated；
2, the present invention connects external computer by external RS232 interface, facilitates external monitoring；
3, for the present invention by 4G network module steady signal transmission, speed is fast, convenient long-range monitoring.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment, the present invention is made
Further to be described in detail, exemplary embodiment of the invention and its explanation for explaining only the invention, are not intended as to this
The restriction of invention.
Embodiment 1
A kind of monitoring system of transformer core current, including Zero flux CT current sensor, the Zero flux CT electric current
Sensing is mounted at master iron core grounding copper bar, by welding mounting bracket at master iron core grounding copper bar come fixed current biography
Then sensor arranges ground connection across sensor internal diameter；The current sensor passes sequentially through signal pre-processing circuit and carries out letter
Number conversion, then by Acquisition Circuit acquisition current signal, signal is then transmitted to control circuit, signal is transmitted to and deposits by control circuit
Storage road is stored, while control circuit connects display, is shown signal by display.Pass through Zero flux CT electricity
Flow sensor carries out the current detecting of master iron core, easy for installation, and measurement precisely, passes through the Signal Pretreatment conversion to detecting
After be transmitted to Acquisition Circuit, shown by display circuit, storage circuit store current signal data, facilitate monitoring.
When implementation, control circuit is connected with RS232 interface, connects portable computer by RS232 interface, data are carried out
It is external.External computer is connected by external RS232 interface, facilitates external monitoring.Control circuit passes through CAN bus and distal end master control
The PC machine of room processed carries out signal transmission.Connection main controller is conveniently monitored.Control circuit connects wireless network module, the nothing
Line network module is 4G wireless network module.By 4G network module steady signal transmission, speed is fast, convenient long-range monitoring.
Using the current situation on Zero flux CT measuring transformer iron core grounding line, when discovery electric current is exceeded, in conjunction in oil
Dissolved gas carries out fault diagnosis, issues equipment running status to operator on duty, proposes its maintenance program.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (4)
1. a kind of monitoring system of transformer core current, which is characterized in that including Zero flux CT current sensor, zero magnetic
Logical CT current sense is mounted at master iron core grounding copper bar, is consolidated by welding mounting bracket at master iron core grounding copper bar
Then constant current sensor arranges ground connection across sensor internal diameter；The current sensor passes sequentially through Signal Pretreatment electricity
Road carries out signal conversion, then acquires current signal by Acquisition Circuit, and signal is then transmitted to control circuit, and control circuit will be believed
Number being transmitted to storage circuit is stored, while control circuit connects display, is shown signal by display.
2. a kind of monitoring system of transformer core current according to claim 1, which is characterized in that the control circuit
It is connected with RS232 interface, portable computer is connected by RS232 interface, data are carried out external.
3. a kind of monitoring system of transformer core current according to claim 1, which is characterized in that the control circuit
Signal transmission is carried out by CAN bus and the PC machine of distal end main control room.
4. a kind of monitoring system of transformer core current according to claim 1, which is characterized in that the control circuit
Wireless network module is connected, the wireless network module is 4G wireless network module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965866.4A CN108918951A (en) | 2018-08-23 | 2018-08-23 | A kind of monitoring system of transformer core current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965866.4A CN108918951A (en) | 2018-08-23 | 2018-08-23 | A kind of monitoring system of transformer core current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108918951A true CN108918951A (en) | 2018-11-30 |
Family
ID=64405549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810965866.4A Withdrawn CN108918951A (en) | 2018-08-23 | 2018-08-23 | A kind of monitoring system of transformer core current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108918951A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501562A (en) * | 2019-09-27 | 2019-11-26 | 上海锐开电气有限公司 | Transformer core grounding band shows sensor on the spot |
| CN110940939A (en) * | 2019-12-16 | 2020-03-31 | 西安交通大学 | Power transformer iron core residual magnetism monitoring and estimating method based on hysteresis loop |
-
2018
- 2018-08-23 CN CN201810965866.4A patent/CN108918951A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501562A (en) * | 2019-09-27 | 2019-11-26 | 上海锐开电气有限公司 | Transformer core grounding band shows sensor on the spot |
| CN110940939A (en) * | 2019-12-16 | 2020-03-31 | 西安交通大学 | Power transformer iron core residual magnetism monitoring and estimating method based on hysteresis loop |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202126470U (en) | Power cable insulation online monitoring device | |
| CN102563363A (en) | Liquid leakage detecting positioning system | |
| CN104061850A (en) | Device for detecting deformation of transformer winding based on pulse on-line injection | |
| CN203606424U (en) | On-line monitoring device for grounding current of transformer core | |
| CN108918951A (en) | A kind of monitoring system of transformer core current | |
| CN209446711U (en) | High-tension cable is cross interconnected and insulated on-line monitoring system | |
| CN103499777B (en) | A kind of appraisal procedure based on ultralow frequency Partial Discharge Detection and system | |
| CN201594108U (en) | Wide-range transformer iron core grounding current on-line monitoring sensing device | |
| CN201490710U (en) | Intelligent monitoring type surge protector | |
| CN105098993B (en) | Intelligent substation network message is analyzed and fault recording system | |
| CN204556765U (en) | A kind of leakage current detect system | |
| WO2016206349A1 (en) | Monitoring device for optical cable reserving apparatus of utility pole | |
| CN206002627U (en) | A kind of DC ground fault on-line checking and alarm device | |
| CN208753985U (en) | Intelligent lightning protection device and the lightning protection box for protecting three-phase circuit | |
| CN106371044A (en) | Magnetic flux leakage based case inside iron core working state monitoring method | |
| CN202748897U (en) | Practical armored cable shielding layer detection device | |
| CN104316824A (en) | On-line iron core grounding current monitoring device | |
| CN202793642U (en) | Transformer iron core temperature on-line monitoring system | |
| CN204330987U (en) | A kind of rotated detection instrument of electromagnetism interference | |
| CN106659106A (en) | Novel cable antimagnetic alarm device | |
| CN109031054A (en) | Fault arc detection device | |
| CN108152652A (en) | A kind of cable insulation test method | |
| CN211318582U (en) | Transformer core with alarm indicator lamp and clamp grounding current monitoring device | |
| CN201278304Y (en) | Anti-interference electric transformer on-line monitoring local discharging | |
| CN204116526U (en) | Iron core grounding electric current on-Line Monitor Device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181130 |
|
| WW01 | Invention patent application withdrawn after publication |