CN101667779A - Bias magnetic power supply device for detecting capacity of bearing direct current bias magnet of transformer - Google Patents
Bias magnetic power supply device for detecting capacity of bearing direct current bias magnet of transformer Download PDFInfo
- Publication number
- CN101667779A CN101667779A CN200810042461A CN200810042461A CN101667779A CN 101667779 A CN101667779 A CN 101667779A CN 200810042461 A CN200810042461 A CN 200810042461A CN 200810042461 A CN200810042461 A CN 200810042461A CN 101667779 A CN101667779 A CN 101667779A
- Authority
- CN
- China
- Prior art keywords
- transformer
- converter
- controller
- voltage
- magnetic
- 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
Images
Abstract
The invention relates to a bias magnetic power supply device for detecting the capacity of bearing direct current (DC) bias magnet of a transformer, which comprises a storage battery, a DC-DC converter, a controller and switches, wherein the storage battery and a voltage input end of the DC-DC converter form a loop through one switch; and a voltage output end of the DC-DC converter and a high-voltage output end of the transformer form a loop through the other switch. The bias magnetic power supply device also comprises a controller connected to an output end of the storage battery, a voltage sensor connected in parallel to the voltage output end of the DC-DC converter, and a current sensor connected to the loop between the DC-DC converter and the transformer, wherein the controller is connected with the DC-DC converter, the voltage sensor and the current sensor through signals respectively. The bias magnetic power supply device can be used for detecting the capacity of bearing the DC bias magnet of the transformer.
Description
Technical field
The present invention relates to a kind of power-supply system, particularly a kind ofly detect the magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability.
Background technology
If transformer moves under the condition of D.C. magnetic biasing, magnetic saturation may appear in transformer core, may cause transformer loss to increase the temperature rise increase of interior metal member and a series of problems such as transformer noise, vibration increase.When the 500kV transformer is ordered goods now, stipulated that transformer needs to bear certain DC current values.But there is not practical methods that it is verified when transformer dispatches from the factory now.Mainly be because the experimental rig that does not have to flow to the direct input dc power of transformer.
Summary of the invention
The object of the present invention is to provide a kind of magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability that detects, to importing adjustable DC magnetic bias current near the transformer of operating state, by the various situations of biased transformer are analyzed, the checking transformer bears the ability of D.C. magnetic biasing, determines whether power transformer product reaches the technical indicator of regulation when ordering goods.
The object of the present invention is achieved like this:
A kind ofly detect the magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability, comprise storage battery, DC-to-DC converter, controller and switch, described storage battery constitutes the loop through the voltage input end of switch and described DC-to-DC converter, the voltage output end of described DC-to-DC converter constitutes the loop through the high-voltage output end of another switch and described transformer, comprise that also a controller is connected on accumulator output end, one voltage sensor is connected in parallel on the voltage output end of described DC-to-DC converter, and a current sensor is connected on the loop between described DC-to-DC converter and the transformer, and described controller respectively with described DC-to-DC converter, voltage sensor is connected with current sensor signal.
Described voltage sensor is connected by optical fiber with described controller respectively with current sensor.
Described controller links to each other with a work station to realize the signal transmission.
Described controller links to each other by optical fiber with described work station.
Further, described optical fiber is provided with low pass filter.
Described DC-DC converter is connected by pwm signal with controller.
Compared with prior art, the present invention has following advantage and good effect:
The present invention can realize to importing adjustable DC magnetic bias current near the 500kV transformer of operating state, by the various situations of biased transformer are analyzed, the checking transformer bears the ability of D.C. magnetic biasing, determines whether power transformer product reaches the technical indicator of regulation when ordering goods.In addition, transmit, avoid having between power supply and the work station contact of electricity, realize the isolation of operating personnel and forceful electric power, protected operator safety by optical fiber realization information.
Description of drawings
The magnetic bias supply unit that detection transformer of the present invention bears the D.C. magnetic biasing ability is provided by following embodiment and accompanying drawing.
Fig. 1 is a kind of circuit diagram that transformer bears the magnetic bias supply unit of D.C. magnetic biasing ability that detects;
Among the figure: 1-storage battery, 2-DC-to-DC converter, 3-transformer, 4-controller, 5-voltage sensor, 6-current sensor, 7-work station, 8-low pass filter.
Embodiment
Below will the magnetic bias supply unit that detection transformer of the present invention bears the D.C. magnetic biasing ability be described in further detail.
As shown in Figure 1: a kind ofly detect the magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability, comprise storage battery 1, DC-to-DC converter 2, controller 4 and switch, described storage battery 1 constitutes the loop through the voltage input end of switch and described DC-to-DC converter 2, and the voltage output end of described DC-to-DC converter 2 constitutes the loop through the input of another switch and described transformer 3.This device comprises that also a controller 4 is connected on storage battery 1 output, and a voltage sensor 5 is connected in parallel on the voltage output end of described DC-to-DC converter 2, and a current sensor 6 is connected on the loop between described DC-to-DC converter 2 and the transformer 3.And described controller 4 is connected with described DC-to-DC converter 2, voltage sensor 5 and current sensor 6 signals respectively.
Described voltage sensor 5 and current sensor 6 are connected by optical fiber with described controller 4 respectively, and detected voltage and current message transmission is given controller 4 separately.Transmit by optical fiber realization information, avoid having between power supply and the work station 7 contact of electricity, realize the isolation of operating personnel and forceful electric power, protected operator safety.Described optical fiber is provided with low pass filter 8, and transmission frequency, bandwidth and information-bearing ability are restricted.
Described controller 4 links to each other with a work station 7, to realize the signal transmission.Described controller 4 and described work station 7 avoid having between power supply and the work station contact of electricity by the optical fiber optical fiber realization information transmission that was connected, and realize the isolation of operating personnel and forceful electric power, have protected operator safety.
Described DC-DC converter 2 and controller 4 are connected by pwm signal, and controller 4 can be controlled the output valve of DC-DC converter 2.
The present invention detects transformer, and to bear the working method of magnetic bias supply unit of D.C. magnetic biasing ability as follows:
The transformer 3 that detects is the 500kv transformer, and this transformer 3 is made up of two input transformers parallel with one another.
Two 500kV transformer inputs apply rated excitation voltage, and the output loop that forms in parallel makes two transformers be operated in Light Condition.The present invention detects the magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability and is connected in the loop, inserts two transformer outputs.
Provide end with storage battery 1 as the electric energy of power supply, the DC/DC converter technique of utilization power electronics has been eliminated the threat of high voltage to other electrical voltage systems.Main circuit is a DC chopper circuit, and output can produce steady adjustable DC voltage, and direct voltage generates the direct current of regulation, i.e. bias current in transformer 3 input loops; By the hot-tempered sound of test transformer 3, determine whether transformer 3 meets the requirement of technical standard or regulation then.
Transmit by optical fiber realization information, avoid having between power supply and the work station 7 contact of electricity, realize the isolation of operating personnel and forceful electric power, protected operator safety.
Work station 7 is a computer, and operating personnel are by the output of Interface Control power supply, but and the parameters of real-time monitored power-supply system.
Adopt the present invention to detect the magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability, make the input of the 500kV transformer under Light Condition bias current is become a reality, avoided of the threat of 500kV high pressure simultaneously personnel and other equipment.In order to verify that transformer bears the ability of D.C. magnetic biasing, determine whether power transformer product reaches the technical indicator of regulation when ordering goods.
Claims (6)
1, a kind ofly detect the magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability, it is characterized in that: comprise storage battery, DC-to-DC converter, controller and switch, described storage battery constitutes the loop through the voltage input end of switch and described DC-to-DC converter, the voltage output end of described DC-to-DC converter constitutes the loop through the high-voltage output end of another switch and described transformer, comprise that also a controller is connected on accumulator output end, one voltage sensor is connected in parallel on the voltage output end of described DC-to-DC converter, and a current sensor is connected on the loop between described DC-to-DC converter and the transformer, and described controller respectively with described DC-to-DC converter, voltage sensor is connected with current sensor signal.
2, a kind of magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability that detects as claimed in claim 1, it is characterized in that: described voltage sensor is connected by optical fiber with described controller respectively with current sensor.
3, a kind of magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability that detects as claimed in claim 1 is characterized in that: described controller links to each other with a work station to realize the signal transmission.
4, a kind of magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability that detects as claimed in claim 3, it is characterized in that: described controller links to each other by optical fiber with described work station.
5, a kind of magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability that detects as claimed in claim 4, it is characterized in that: described optical fiber is provided with low pass filter.
6, a kind of magnetic bias supply unit that transformer bears the D.C. magnetic biasing ability that detects as claimed in claim 1, it is characterized in that: described DC-DC converter is connected by pwm signal with controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810042461A CN101667779A (en) | 2008-09-03 | 2008-09-03 | Bias magnetic power supply device for detecting capacity of bearing direct current bias magnet of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810042461A CN101667779A (en) | 2008-09-03 | 2008-09-03 | Bias magnetic power supply device for detecting capacity of bearing direct current bias magnet of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101667779A true CN101667779A (en) | 2010-03-10 |
Family
ID=41804257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810042461A Pending CN101667779A (en) | 2008-09-03 | 2008-09-03 | Bias magnetic power supply device for detecting capacity of bearing direct current bias magnet of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101667779A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033695A (en) * | 2011-09-28 | 2013-04-10 | 特变电工股份有限公司 | Detection method of transformer direct current bias magnetic tolerance ability |
| CN103176069A (en) * | 2011-12-23 | 2013-06-26 | 特变电工沈阳变压器集团有限公司 | Test method for applying DC (Direct Current) magnetic bias current of transformer |
| CN103995177A (en) * | 2014-04-22 | 2014-08-20 | 国家电网公司 | Power transformer neutral point direct current measurement and wave-recording device and detection method |
-
2008
- 2008-09-03 CN CN200810042461A patent/CN101667779A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033695A (en) * | 2011-09-28 | 2013-04-10 | 特变电工股份有限公司 | Detection method of transformer direct current bias magnetic tolerance ability |
| CN103033695B (en) * | 2011-09-28 | 2016-03-02 | 特变电工股份有限公司 | The detection method of transformer tolerance DC magnetic biasing ability |
| CN103176069A (en) * | 2011-12-23 | 2013-06-26 | 特变电工沈阳变压器集团有限公司 | Test method for applying DC (Direct Current) magnetic bias current of transformer |
| CN103995177A (en) * | 2014-04-22 | 2014-08-20 | 国家电网公司 | Power transformer neutral point direct current measurement and wave-recording device and detection method |
| CN103995177B (en) * | 2014-04-22 | 2016-06-08 | 国家电网公司 | The measurement of power transformer neutral point direct current and wave recording device and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8878546B2 (en) | Apparatus and method for quickly determining fault in electric power system | |
| KR102267415B1 (en) | Apparatus for determining abnormal status of wireless power transmission coil | |
| CN102707113A (en) | Systems, methods, and apparatus for detecting theft and status of electrical power | |
| CN103092147B (en) | There is the process control field device of circuit protection | |
| CN106416032A (en) | On-board electric network system isolating circuit for DC/DC converters, and method for isolating an on-board electric network system from a DC/DC converter | |
| CN103947079A (en) | Non-contact power supply apparatus and non-contact power supply system | |
| CN102957219A (en) | Maximum power tracking system and method of power transmission line induction power supply source | |
| KR20230078803A (en) | Current detection circuit, leak current detection method and charging system | |
| CN104753023A (en) | Residual current protecting device | |
| CN101667779A (en) | Bias magnetic power supply device for detecting capacity of bearing direct current bias magnet of transformer | |
| CN105811569B (en) | A kind of hybrid energy supplying system of high voltage DC breaker | |
| CN204389530U (en) | The output gate control device of high-voltage DC power supply | |
| CN102611079A (en) | Short-circuit protection system and short-circuit protection method for isolated power converter | |
| CN103595264B (en) | There is the high frequency electric source of site manual operation system | |
| CN201323467Y (en) | Magnetic-bias power supply device | |
| CN105870880A (en) | Intelligent protection system for secondary open circuit of current transformer | |
| CN110879338A (en) | High-voltage power equipment insulation detection system based on inductive power supply and detection method thereof | |
| KR101739092B1 (en) | Method for monitoring defect of line in solar power generation apparatus | |
| CN104418194A (en) | Elevator control cabinet | |
| CN102904210A (en) | Leakage protection method, leakage protection device and water heater | |
| CN207424155U (en) | Power failure detection device | |
| CN103001334A (en) | Suspension power extraction device and suspension power extraction method | |
| CN203179688U (en) | Intelligent voltage transformer | |
| CN102062640B (en) | High-voltage switch temperature monitoring and early warning system | |
| CN203205853U (en) | An intelligent controller apparatus used for ship over-current selective protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100310 |