CN110261665A - Transformer DC magnetic bias on-line monitoring system - Google Patents
Transformer DC magnetic bias on-line monitoring system Download PDFInfo
- Publication number
- CN110261665A CN110261665A CN201910701984.9A CN201910701984A CN110261665A CN 110261665 A CN110261665 A CN 110261665A CN 201910701984 A CN201910701984 A CN 201910701984A CN 110261665 A CN110261665 A CN 110261665A
- Authority
- CN
- China
- Prior art keywords
- transformer
- collecting device
- processing unit
- current
- current collecting
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- 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
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices
-
- 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
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Protection Of Transformers (AREA)
Abstract
The invention discloses a kind of transformer DC magnetic bias on-line monitoring systems, can be monitored to the D.C. magnetic biasing of transformer.A kind of transformer DC magnetic bias on-line monitoring system, including current collecting device, with transformer neutral point circuit, current collecting device acquires transformer neutral point DC component in real time for current collecting device installation；Data processing unit, data processing unit are connected with current collecting device, and data processing unit is used for the DC current signal of operation current acquisition device output；Backstage monitoring center, the operation result of data processing unit are transferred to backstage by data transfer mode and monitor.
Description
Technical field
The invention belongs to transformer online monitoring technical fields, and it is online to concretely relate to a kind of transformer DC magnetic bias
Monitoring system.
Background technique
In recent years, as more and more DC power transmission lines put into operation, D.C. magnetic biasing is that transformer vibration is caused to add
The main reason for acute, although people have certain understanding to the negative effect of the direct current monopole ground return circuit method of operation, big
Majority shows that this " influence " is big than expected using the event of the transformer vibration aggravation occurred in the power grid of direct current transportation.From
On-site test data are and neutral it is found that the vibration noise and harmonic wave of transformer increase with the increase of neutral line direct current
Polarity of the size of line DC current substantially with DC line power transmission power, DC line under the monopole the earth method of operation has
It closes；
This phenomenon can be explained with familiar transformer core saturated magnetization characteristic: flow into the direct current of winding
Stream becomes a part of transformer magnetizing current, which makes transformer core bias, change the operating point of transformer,
A part of original magnetization curve workspace is set to move to iron core magnetic saturation area, as a result total exciting current becomes peaked wave, finally leads
The vibration of mutagens depressor increases；It will cause the problems such as transformer vibration and noise significantly increases, iron core generates heat, resonance, influence transformation
Device service life and safety in production.The D.C. magnetic biasing situation of monitoring and research transformer is to solve its influence to transformer,
Common recognition as more and more experts and scholars.
Summary of the invention
The object of the present invention is to provide a kind of transformer DC magnetic bias on-line monitoring systems, can be to the direct current of transformer
Bias is monitored.
In order to solve the above technical problems, the object of the present invention is achieved like this:
A kind of transformer DC magnetic bias on-line monitoring system, including current collecting device, current collecting device installation and change
In depressor neutral point circuit, current collecting device acquires transformer neutral point DC component in real time；Data processing unit, at data
Reason unit is connected with current collecting device, DC current letter of the data processing unit for the output of operation current acquisition device
Number；Backstage monitoring center, the operation result of data processing unit are transferred to backstage by data transfer mode and monitor.
Preferred embodiment on the basis of above scheme and as above scheme: current collecting device uses open-close type current
Sensor.
Preferred embodiment on the basis of above scheme and as above scheme: data transfer mode includes GPRS connection side
Formula.
Preferred embodiment on the basis of above scheme and as above scheme: data transfer mode further includes that RS485 connects
Mouth connection type, Ethernet connection type or optical fiber connection type.
Preferred embodiment on the basis of above scheme and as above scheme: further including shock sensor, temperature and humidity biography
Sensor and noise transducer.
The present invention is prominent and beneficial compared with prior art to be had the technical effect that
Transformer DC magnetic bias on-line monitoring system of the invention, (1) device facilitate peace using open-close type current sensor
Dress and maintenance, without disconnecting earthing bar when maintenance, on system safety without influence.
(2) device has self-protection function, and when generating system short circuit, automatic protection Hall sensor is from high current
Impact failure.
(3) vibrating sensor, Temperature Humidity Sensor and noise transducer can be matched, transformer Oscillation Amplitude, frequency are monitored
Rate and noise.
(4) device software improves the temperature characterisitic of Hall sensor according to temperature adjustmemt data.
Detailed description of the invention
Fig. 1 is attachment structure schematic diagram of the invention.
Appended drawing reference: current collecting device 01, data processing unit 02, backstage monitoring center 03；
Specific embodiment
With specific embodiment, the invention will be further described with reference to the accompanying drawing；
Embodiment one:
This gives a kind of transformer DC magnetic bias on-line monitoring system, including current collecting device 01, electric currents
Acquisition device uses open-close type current sensor, and with transformer neutral point circuit, current acquisition is filled for current collecting device installation
Set acquisition transformer neutral point DC component in real time；Data processing unit 02, data processing unit is connected with current collecting device
It connects, data processing unit is used for the DC current signal of operation current acquisition device output；Backstage monitoring center 03, data processing
The operation result of unit is transferred to backstage by data transfer mode and monitors；Data transfer mode includes GPRS connection type.Also
Including shock sensor, Temperature Humidity Sensor and noise transducer, transformer Oscillation Amplitude, frequency and noise are monitored.
D.C. magnetic biasing sensor, using open loop type ferromagnetic circuit and Hall magnetic balance type working principle, precise measurement is large-scale
High-tension electricity transformer neutral earthing end D.C. magnetic biasing amount.It is direct that primary side is tested bias current signal by D.C. magnetic biasing sensor
Convert the 4~20mA standard signal linearly exported.Sensor has good former and deputy side insulated heat performance, installation
It is easy to maintenance, the features such as power is small, frequency response is wide, and reaction speed is fast, strong antijamming capability, on the spot suitable for D.C. magnetic biasing signal
Acquisition, display or distant signal transmission and application.
Direct current and alternating current component in precise measurement earthing bar of the present invention, and current data is summarized into background monitoring
The heart and distal end are dispatched, background program periodic logging current data, can show scoreboard by list or curve form.It simultaneously can be with root
It needs to detect the information such as transformer temperature, noise, vibration according to user, is shown in daemon software, transformer neutral point ground connection electricity
The parameters Coaxial Superimposed such as stream, temperature, vibration, noise shows, more can explicitly stated running state of transformer.
Technical parameter:
| Range (electric current in earthing bar) | - 100A~+100A |
| Precision (- 50A~+50A) | ± 2% |
| Precision (gamut) | ± 5% |
| Input overload capacity | 5KV, < 100ms |
| Pressure-resistant (between earthing bar and cabinet) | 2.5KV、1min |
| Interference free performance | 4 grades of impulse train, 2 grades of surge |
| Power consumption (removes heater) | < 10W |
| Heater power consumption | < 200W |
| Power supply | 220VAC |
| Operating temperature | - 40 DEG C~80 DEG C |
| Measurement interval | < 2s |
| Communication protocol | Modbus |
| Wireless communications parameter | GPRS |
| Vibration monitoring is axial | X、Y、Z |
| Vibration monitoring range (peak value) | ±80g |
| Vibration monitoring frequency response | 0.1~10KHZ |
| Noise | 16~134 (dBA) |
Embodiment two:
This gives a kind of transformer DC magnetic bias on-line monitoring systems, including current collecting device, electric current to adopt
Acquisition means use open-close type current sensor, current collecting device installation with transformer neutral point circuit in, current collecting device
Acquisition transformer neutral point DC component in real time；Data processing unit, data processing unit are connected with current collecting device, number
The DC current signal of operation current acquisition device output is used for according to processing unit；Backstage monitoring center, data processing unit
Operation result is transferred to backstage by data transfer mode and monitors；Data transfer mode further include RS485 interface connection type, with
Too net connection type or optical fiber connection type.It further include shock sensor, Temperature Humidity Sensor and noise transducer.
In the description of the present invention, it is to be understood that, term " on ", "lower", "top", "bottom", "inner", "outside" etc. indicate
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when usually put
Orientation or positional relationship or the orientation or positional relationship that usually understands of those skilled in the art, be merely for convenience of retouching
It states the present invention and simplifies description, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.
Above-described embodiment is only presently preferred embodiments of the present invention, is not limited the scope of the invention according to this, therefore: it is all according to
The equivalence changes that structure of the invention, shape, principle are done, should all be covered by within protection scope of the present invention.
Claims (5)
1. a kind of transformer DC magnetic bias on-line monitoring system, it is characterised in that:
Including current collecting device, with transformer neutral point circuit, current collecting device is adopted in real time for current collecting device installation
Collect transformer neutral point DC component；
Data processing unit, data processing unit are connected with current collecting device, and data processing unit is adopted for operation current
The DC current signal of acquisition means output；
Backstage monitoring center, the operation result of data processing unit are transferred to backstage by data transfer mode and monitor.
2. transformer DC magnetic bias on-line monitoring system according to claim 1, it is characterised in that: current collecting device is adopted
With open-close type current sensor.
3. transformer DC magnetic bias on-line monitoring system according to claim 1, it is characterised in that: data transfer mode packet
Include GPRS connection type.
4. transformer DC magnetic bias on-line monitoring system according to claim 1, it is characterised in that: data transfer mode is also
Including RS485 interface connection type, Ethernet connection type or optical fiber connection type.
5. transformer DC magnetic bias on-line monitoring system according to claim 1, it is characterised in that: further include vibration-sensing
Device, Temperature Humidity Sensor and noise transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910701984.9A CN110261665A (en) | 2019-07-31 | 2019-07-31 | Transformer DC magnetic bias on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910701984.9A CN110261665A (en) | 2019-07-31 | 2019-07-31 | Transformer DC magnetic bias on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110261665A true CN110261665A (en) | 2019-09-20 |
Family
ID=67912621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910701984.9A Pending CN110261665A (en) | 2019-07-31 | 2019-07-31 | Transformer DC magnetic bias on-line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110261665A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124922A (en) * | 2019-12-30 | 2021-07-16 | 上海电力大学 | Method for monitoring running state of non-electric-quantity multi-physical-quantity synchronous measurement electrical equipment |
| CN114184876A (en) * | 2022-02-16 | 2022-03-15 | 国网江西省电力有限公司电力科学研究院 | DC magnetic bias monitoring, evaluation and earth model correction platform |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197178A (en) * | 2013-03-21 | 2013-07-10 | 辽宁省电力有限公司电力科学研究院 | Device and method of on-line monitoring of transformer direct current magnetic bias |
| CN105353200A (en) * | 2015-12-10 | 2016-02-24 | 国网四川省电力公司电力科学研究院 | On-line monitoring system for DC magnetic bias current of transformer |
| CN106896285A (en) * | 2017-03-21 | 2017-06-27 | 国网上海市电力公司 | Transformer DC magnetic bias monitoring system based on vibration, noise and neutral point current |
| CN107807288A (en) * | 2017-09-13 | 2018-03-16 | 安徽正广电电力技术有限公司 | Transformer DC magnetic bias on-line monitoring system |
| CN108075572A (en) * | 2017-12-28 | 2018-05-25 | 潘远新 | Transformer DC magnetic bias on-line monitoring system |
| CN108241098A (en) * | 2016-12-27 | 2018-07-03 | 大唐观音岩水电开发有限公司 | Power transformer D.C. magnetic biasing monitors system and monitoring method |
-
2019
- 2019-07-31 CN CN201910701984.9A patent/CN110261665A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197178A (en) * | 2013-03-21 | 2013-07-10 | 辽宁省电力有限公司电力科学研究院 | Device and method of on-line monitoring of transformer direct current magnetic bias |
| CN105353200A (en) * | 2015-12-10 | 2016-02-24 | 国网四川省电力公司电力科学研究院 | On-line monitoring system for DC magnetic bias current of transformer |
| CN108241098A (en) * | 2016-12-27 | 2018-07-03 | 大唐观音岩水电开发有限公司 | Power transformer D.C. magnetic biasing monitors system and monitoring method |
| CN106896285A (en) * | 2017-03-21 | 2017-06-27 | 国网上海市电力公司 | Transformer DC magnetic bias monitoring system based on vibration, noise and neutral point current |
| CN107807288A (en) * | 2017-09-13 | 2018-03-16 | 安徽正广电电力技术有限公司 | Transformer DC magnetic bias on-line monitoring system |
| CN108075572A (en) * | 2017-12-28 | 2018-05-25 | 潘远新 | Transformer DC magnetic bias on-line monitoring system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124922A (en) * | 2019-12-30 | 2021-07-16 | 上海电力大学 | Method for monitoring running state of non-electric-quantity multi-physical-quantity synchronous measurement electrical equipment |
| CN114184876A (en) * | 2022-02-16 | 2022-03-15 | 国网江西省电力有限公司电力科学研究院 | DC magnetic bias monitoring, evaluation and earth model correction platform |
| CN114184876B (en) * | 2022-02-16 | 2022-05-10 | 国网江西省电力有限公司电力科学研究院 | DC magnetic bias monitoring, evaluation and earth model correction platform |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103713217B (en) | The on-line monitoring method of Operation Condition of Power Transformers under a kind of Direct Current Bias | |
| CN106643877A (en) | Multi-sensing information fusion-based power transformer on-line monitoring system and method | |
| CN104237604A (en) | Current monitoring warning device for overhead transmission line | |
| CN202041575U (en) | Condition monitoring system for zinc oxide lightning arrester | |
| CN102222984B (en) | On-line monitoring inductive electricity-taking device for intelligent switchgear | |
| CN204085438U (en) | Point machine indication rod gap width monitoring system and wireless handheld terminal thereof | |
| CN110261665A (en) | Transformer DC magnetic bias on-line monitoring system | |
| CN103105214B (en) | Detecting device of coal bunker material level | |
| CN105322665A (en) | Resonant wireless power supply system for high-voltage power transmission line | |
| CN206594257U (en) | Air reactor turn-to-turn insulation intelligent detection device | |
| CN209673250U (en) | A kind of passive and wireless temperature transducer | |
| CN203838218U (en) | Electronic current transformer | |
| CN105490501B (en) | A kind of acquisition of vibrational energy and wireless launcher | |
| CN205484648U (en) | Distribution lines on -line monitoring device | |
| CN204228099U (en) | Point machine indication rod gap width monitoring system and current vortex sensor thereof | |
| CN202256657U (en) | Secondary open circuit detecting device of current transformer | |
| CN201107372Y (en) | Monitoring device for lightning arrestor on-line action | |
| CN111289823A (en) | Lightning arrester monitoring device | |
| CN204374272U (en) | A kind of mutual inductor mode transformer grounding leakage current wireless monitoring device | |
| CN208125798U (en) | Open type leakage current sensor | |
| CN104197820A (en) | System for online real-time monitoring of switch machine indication bar notch width | |
| CN211209375U (en) | Online monitoring system of intelligent quick user incoming line demarcation type cable branch box | |
| CN203191028U (en) | Bunker material level detecting system | |
| CN201464534U (en) | Monitoring device for lightning travelling wave in transmission line | |
| CN204479697U (en) | Generator amature online turn-to-turn short circuit monitoring system front-end equipment |
Legal Events
| 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: 20190920 |