CN108241087A - Transformer iron core grounding current monitoring device - Google Patents
Transformer iron core grounding current monitoring device Download PDFInfo
- Publication number
- CN108241087A CN108241087A CN201810180090.5A CN201810180090A CN108241087A CN 108241087 A CN108241087 A CN 108241087A CN 201810180090 A CN201810180090 A CN 201810180090A CN 108241087 A CN108241087 A CN 108241087A
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- China
- Prior art keywords
- monitoring
- iron core
- mainboard
- structure formula
- current sensor
- 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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Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000012806 monitoring device Methods 0.000 title claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 37
- 238000004891 communication Methods 0.000 claims abstract description 30
- 230000004907 flux Effects 0.000 claims abstract description 17
- 230000002463 transducing effect Effects 0.000 claims abstract description 3
- 238000005070 sampling Methods 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000001157 Fourier transform infrared spectrum Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010617 multipoint ground Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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
-
- 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
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16528—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values using digital techniques or performing arithmetic operations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
Transformer iron core grounding current monitoring device belongs to transformer equipment on-line monitoring technique field.The present invention includes Zero flux high-precision single-turn cored structure formula current sensor, monitoring mainboard, display unit, power supply unit and communication unit, Zero flux high-precision single-turn cored structure formula current sensor, display unit, power supply unit and communication unit are connect respectively with monitoring mainboard, the monitoring mainboard is used to receive the transducing signal of Zero flux high-precision single-turn cored structure formula current sensor, and is being locally displayed and is being sent to far-end server by communication unit it.The present invention can monitor transformer iron core grounding current in real time, and monitoring data are sent to cloud platform server-side in real time, and cloud platform server-side handles monitoring data in real time.
Description
Technical field
The invention belongs to transformer equipment on-line monitoring technique fields.
Background technology
Power transformer is one of equipment main in electric system and expensive, during its normal operation electric system pacify
Entirely, reliably, the important guarantee of economical operation.During power transformer normal operation, iron core must have and only have some reliable grounds,
When 2 points of iron core or multipoint earthing, the uneven current potential between iron core will form circulation between earth point, make iron core local
Overheat, causes iron core localized burn or even ground strip is made to fuse, iron core current potential is caused to suspend over the ground, cause to break over the ground when serious
The reliability service of continuous property disruptive discharge failure, serious threat transformer and power grid.When multipoint earth faults occurs in transformer core
When, iron core grounding current can significantly increase,《Power equipment preventive trial regulation》It provides necessary when earth current is more than 100mA
Corresponding measure is taken to be handled.At present, field operator is detected the main of iron core grounding current and is gone using clamp on amperemeter
Iron core grounding line is measured, due to being interfered by transformer high-intensity magnetic field, it is difficult to ensure that the precision of clamp on amperemeter measurement data and accurate
Property, and regular visit can not ensure to find core multi-point ground fault in time.
Invention content
The technical problems to be solved by the invention are, the present invention provides a kind of transformer core grounding based on cloud platform
Current monitoring device.
The present invention solve the technical problem the technical solution adopted is that, transformer iron core grounding current monitoring device,
It is characterized in that, including Zero flux high-precision single-turn cored structure formula current sensor, monitoring mainboard, display unit, power supply unit and leads to
Believe unit, Zero flux high-precision single-turn cored structure formula current sensor, display unit, power supply unit and communication unit respectively with monitoring
Mainboard connects, and the monitoring mainboard is used to receive the transducing signal of Zero flux high-precision single-turn cored structure formula current sensor, and will
It is being locally displayed and is being sent to far-end server by communication unit.
The monitoring mainboard is by analog signal processing module connected in sequence, AD sampling modules, CPLD modules and microcontroller
Module composition.
Specifically, monitoring device of the invention by Zero flux high-precision single-turn cored structure formula current sensor, monitoring mainboard,
Display unit, power supply unit and external GPRS communication antennas are formed.Power supply unit input terminal and 220V AC powers pass through conducting wire
Connection, power supply unit power output end are connected with the power input of monitoring mainboard by conducting wire, and Zero flux high-precision single turn is worn
Core type current sensor output with monitoring mainboard input end of analog signal connected by conducting wire, display unit input port and
The display interface of monitoring mainboard is connected by conducting wire, the day of the GPRS communicating circuits of external GPRS communication antennas and monitoring mainboard
Line end mouth is connected by conducting wire.Device sends the server-side that monitoring data arrive cloud platform, the server-side of cloud platform receives, analyzes,
Monitoring data are stored, user can check monitoring data by pc client and mobile client, when cloud platform server-side monitors
When current data transfinites, cloud platform WEB terminal sends warning message to designated user.
The Zero flux high-precision single-turn cored structure formula current sensor, the sensor for high permeability glass Mo alloy-iron cores,
Profound and negative feedbck compensation technique, good three layers of shielding design, the absolute error and temperature change for significantly reducing phase are drawn
The phase drift risen, temperature is in -40 DEG C~+70 DEG C variation ranges, and phase measurement error is within 2 '.Sensor will acquire
Primary current signal be converted to secondary current signal, no-load voltage ratio 1000:1.
The monitoring mainboard is by analog signal processing module, AD sampling modules, one-chip computer module, CPLD modules, 1 tunnel
GPRS communication module, 1 road RS485 communicating circuit moulds.One-chip computer module main control chip is STM32F103, CPLD module master control cores
Piece is MAX570, and one-chip computer module is connected with CPLD modules by parallel data bus line, and AD sampling module main control chips are
AD7606, AD sampling module are connected with CPLD modules by data/address bus, and 1 tunnel GPRS communication module main control chip is that ZL102L leads to
Module is interrogated, 1 tunnel GPRS communication module is connected by a serial line interface of data line and one-chip computer module, 1 road RS485 communication electricity
Road main control chip is ADM2587, and 1 road RS485 communicating circuits cross data line and another serial line interface of one-chip computer module connects
It connects.In work, the primary current signal on transformer core grounding line is converted to secondary current signal, monitoring master by sensor
The analog signal processing module of plate is responsible for handling the secondary current signal of sensor conversion, and AD sampling modules are responsible for sampling simulation letter
The voltage signal of number processing module conversion, CPLD modules are responsible for controlling AD sampling modules, and CPLD modules pass through parallel data bus line
AD sampled datas are transmitted to one-chip computer module, one-chip computer module receives, calculates sampled data, and one-chip computer module passes through 1 road GPRS
Communication module broadcasts data to cloud platform server-side, and one-chip computer module broadcasts data to scene by 1 road RS485 communication modules
IED devices.
The analog signal processing module, analog signal processing module include IV conversion circuit and automatic range switching electricity
Road, IV conversion circuit realize that sensor output secondary current signal is converted to voltage signal, and automatic range switching circuit, which uses, to be divided
Grade amplifying technique ensures the precision of low current and high current signal, and gamut is divided into 8 grades of amplifying circuits, realizes 1mA~10A's
Gamut high-acruracy survey efficiently solves the measurement error that sensor nonlinear is brought.
The cloud platform server-side is supported, by specialized protocol and specialized configuration interprogram communication, to complete system configuration, simultaneously
Also configuration service (allowing mobile terminal or rapid configuration during without dedicated program) is provided in WEB terminal mouth, cloud platform server-side is at TCP ends
Mouth opens service routine, and the service thread for starting certain amount waits for monitoring device connection, when monitoring device connects, divides immediately
With the data that idle server process monitoring device uploads, real-time data base is stored in after parsing data.Cloud platform server-side is protected
After having deposited real time data, place data into variation and preserve service routine queue, variation preserves service routine and determined according to configuration file
Justice preserves the historical data of the point.After cloud platform server-side preserves completion real time data, alerter service team is placed data into
Row, alerter service defines according to configuration file, and analysis is currently alarm or action, how to be alarmed, as required, write-in or
Library of alarming is removed, and is saved into historical events library.
The beneficial effects of the invention are as follows：The present invention can monitor transformer iron core grounding current in real time, and monitoring data are sent out in real time
Cloud platform server-side is sent to, cloud platform server-side handles monitoring data in real time, has the work(such as electric current overload alarm, parameter setting
Can, warning message is sent to designated user by various ways such as short message, mails, and user can access cloud by a variety of clients and put down
Platform WEB terminal checks real-time and Historical Monitoring data, can find potential faults in time, reduces or substitute the inspection work of operations staff
Make, can be widely used for the on-line monitoring of the iron core grounding current of the electrical equipments such as transformer.Based on above-mentioned, so should with good
Use prospect.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is present invention monitoring mainboard structure block diagram；
Fig. 3 is cloud platform service architecture block diagram of the present invention.
Specific embodiment
Fig. 1, shown in 2, a kind of transformer iron core grounding current monitoring device based on cloud platform, by Zero flux high-precision
Single-turn cored structure formula current sensor monitors mainboard, and display unit, power supply unit and external GPRS communication antennas are formed, Zero flux
High-precision single-turn cored structure formula current sensor monitors mainboard, and display unit and power supply unit are mounted in device box, external GPRS
Communication antenna is drawn from device box body.The power output end of power supply unit is connected with the power input of monitoring mainboard, transformer
Iron core grounding line passes through Zero flux high-precision single-turn cored structure formula current sensor, Zero flux high-precision single-turn cored structure formula current sense
Earth current is converted to secondary current by device, and Zero flux high-precision single-turn cored structure formula current sensor output and monitoring are led
The input end of analog signal of plate is connected by conducting wire, and the display interface of display unit input port and monitoring mainboard is connected by conducting wire
It connects, external GPRS communication antennas are connected with the antenna port of the GPRS communicating circuits of monitoring mainboard by conducting wire, and monitoring mainboard leads to
It crosses GPRS communications to connect with cloud platform server-side, monitoring mainboard is communicated by RS485 and connect with In-situ FTIR spectra D.
Fig. 1, shown in 2, monitoring mainboard is by analog signal processing module, AD sampling modules, one-chip computer module, CPLD moulds
Block, all the way GPRS communication module, all the way RS485 communication modules form.
The main control chip of one-chip computer module is STM32F103, and CPLD module main control chips are MAX570, one-chip computer module and
CPLD modules are connected by parallel data bus line, and AD sampling module main control chips are AD7606, AD sampling modules and CPLD modules
It is connected by data/address bus, GPRS communication module main control chip is ZL102L communication module groups, and GPRS communication module passes through data line
It is connect with a serial line interface of one-chip computer module, RS485 communication module main control chips are ADM2587, RS485 communication module mistakes
Another of data line and one-chip computer module serial line interface connect.In work, the analog signal processing module and AD of mainboard are monitored
Sampling module is responsible for acquisition conversion earth current signal, and CPLD modules are responsible for controlling AD sampling modules, and CPLD modules pass through parallel
Data/address bus transmits gathered data to one-chip computer module, and one-chip computer module calculates gathered data, and one-chip computer module is led to by GPRS
News module broadcasts data to cloud platform server-side, and one-chip computer module broadcasts data to In-situ FTIR spectra D by RS485 communication modules and fills
It puts.
Shown in Fig. 3, cloud platform server-side is supported, by specialized protocol and specialized configuration interprogram communication, to complete system configuration,
WEB configurators service (allowing mobile terminal or rapid configuration during without dedicated program) is provided simultaneously, and cloud platform server-side is at TCP ends
Mouth opens service routine, and the service thread for starting certain amount waits for monitoring device connection, when monitoring device connects, divides immediately
With the data that idle server process monitoring device uploads, real-time data base is stored in after parsing data.Cloud platform server-side is protected
After having deposited real time data, place data into variation and preserve service routine queue, variation preserves service routine and determined according to configuration file
Justice, preserve the point arrives alarm and historical data base.After cloud platform server-side preserves completion real time data, alarm is placed data into
Service routine queue, alerter service are defined according to configuration file, and analysis is currently alarm or action, how to alarm, presses
The library it is required that write-in or removing are being alarmed, and it is saved into historical events library.
Claims (2)
1. transformer iron core grounding current monitoring device, which is characterized in that passed including Zero flux high-precision single-turn cored structure formula electric current
Sensor, monitoring mainboard, display unit, power supply unit and communication unit, Zero flux high-precision single-turn cored structure formula current sensor are shown
Show that unit, power supply unit and communication unit are connect respectively with monitoring mainboard, the monitoring mainboard is used to receive Zero flux high-precision
The transducing signal of single-turn cored structure formula current sensor, and it is being locally displayed and is being sent to remote service by communication unit
Device.
2. transformer iron core grounding current monitoring device as described in claim 1, which is characterized in that the monitoring mainboard is by suitable
The analog signal processing module of secondary connection, AD sampling modules, CPLD modules and one-chip computer module are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810180090.5A CN108241087A (en) | 2018-03-05 | 2018-03-05 | Transformer iron core grounding current monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810180090.5A CN108241087A (en) | 2018-03-05 | 2018-03-05 | Transformer iron core grounding current monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108241087A true CN108241087A (en) | 2018-07-03 |
Family
ID=62698971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810180090.5A Pending CN108241087A (en) | 2018-03-05 | 2018-03-05 | Transformer iron core grounding current monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108241087A (en) |
Cited By (1)
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998521A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | Ground-current remote monitor for transformer cores |
-
2018
- 2018-03-05 CN CN201810180090.5A patent/CN108241087A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998521A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | Ground-current remote monitor for transformer cores |
Cited By (1)
| 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 |
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| 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: 20180703 |