CN202633969U - Electronic traction transformer used for cophase supply in electrified railway tractive power supply system - Google Patents
Electronic traction transformer used for cophase supply in electrified railway tractive power supply system Download PDFInfo
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- CN202633969U CN202633969U CN 201220131575 CN201220131575U CN202633969U CN 202633969 U CN202633969 U CN 202633969U CN 201220131575 CN201220131575 CN 201220131575 CN 201220131575 U CN201220131575 U CN 201220131575U CN 202633969 U CN202633969 U CN 202633969U
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Abstract
The utility model discloses an electronic traction transformer used for cophase supply in an electrified railway tractive power supply system. Using an electronic traction transformer technology to realize cophase supply in a tractive power supply system, a problem of electrified railway power quality is thoroughly solved. The electronic traction transformer comprises a primary electron power transformer (10), a high-frequency traction transformer (20), and a secondary power transformer (30). Input three-phase power frequency AC power is output as three-phase high-frequency AC through the primary electron power transformer (10). The three-phase high-frequency AC being as input of a primary side of the high-frequency traction transformer (20), a secondary side of the high-frequency traction transformer (20) generates two-phase low-voltage high-frequency AC. Through the secondary power transformer (30), the two-phase low-voltage high-frequency AC outputs as two-phase equal phase power frequency AC power to supply for tractive loads.
Description
Technical field
The present invention relates to electric railway traction power supply system, particularly a kind of electric traction transformer that is used for electric railway traction power supply system cophase supply.
Background technology
Electric traction is used widely in the railway of countries in the world owing to have high efficiency, low energy consumption, advantage such as pollution-free, and China's electric railway adopts single phase industrial frequence (50Hz) to exchange the 27.5kV power supply system.The traction net adopts the single phase power supply mode, causes the electric power system three-phase load uneven, produces the negative phase-sequence influence to electric power system; Electric locomotive adopts and exchanges the flexible power supply technology, causes electric power system electric current, voltage waveform distortion, produces the harmonic effects to electric power system; The conventional electric power locomotive adopts the dc traction motor technology, causes the electric power system power factor low, produces reactive power problem; In addition, because traction load changes with differences such as line slope, transportation tissue, train operation operating modes, cause the power system voltage fluctuation comparatively violent.Along with development of electric power industry, continuous advancement in technology; People more and more pay close attention to the power quality problem that electric railway causes; The technology and the scheme of many solution electrified railway electric energy quality problems have also been formed; But because the electrified railway electric energy quality problem relates to many aspects such as negative phase-sequence, harmonic wave, reactive power, voltage fluctuation, present technology and scheme only are directed against wherein one or several, have certain limitation.
The China railways tractive power supply system adopts homophase single side feeding mode; Traction substation both sides supply arm is usually by traction transformer out of phase power voltage supply; For guaranteeing to insulate between the supply arm contact line of both sides, need between the supply arm of both sides, to be provided with insulation sectioning---electric phase-splitting.Train divides phase time through electricity, will lose electric energy power in short-term, thereby reduce the train road; Cause the train running speed loss,, propose to adopt the cophase supply mode: promptly the high-power electric and electronic converting means is set in traction substation 27.5kV side in order thoroughly to solve the adverse effect of electric neutral section to the railway system; With the out of phase voltage transformation of traction power transformation depressor output is in-phase voltage, the output confession contact line of same phase, because traction substation both sides supply arm is the in-phase voltage power supply, therefore can cancel this locates electric neutral section; Simultaneously; Utilize in the voltage transformation process,, solve power quality problems such as reactive power, negative phase-sequence and voltage fluctuation the control of electric weight amplitude, phase place; But cophase supply is because power electronic device switching frequency and loss problem are unsatisfactory for the solution effect of harmonic wave.At present, China's first covering device just Meishan traction substation trial run at present in the Chengdu-Kunming Railway Line.
Along with power electronic technology and development of material technology; Novel transformer-electronic power transformer has appearred; This transformer is made up of high frequency transformer and two core devices of converters, and converters converts the industrial frequency AC electric energy of importing into the high-frequency ac electric energy provides high frequency transformer once to import, and high frequency transformer secondary output electric energy is connected with converters; Convert the high-frequency ac electric energy of output into the industrial frequency AC electric energy, the load of power supply power.Electronic power transformer is accomplished electric weight frequency conversion, function such as covert when realizing traditional transformer voltage transformation function.Electronic power transformer has following characteristics: little, in light weight, the non-environmental-pollution of (1) volume; (2) can regulate the control system trend to the quality of power supply; (3) has the function of circuit breaker; (4) contain intelligent control unit, be convenient to realize the digitlization and the intellectuality of electrical network.At present, electronic power transformer has a spot of Application Research abroad, and domestic research still is in the starting stage.This technology is applied to electric railway, needs to adopt the high frequency traction transformer that is fit to the electric railway application to reach relevant converters etc., forms the novel electron power transformer-electric traction transformer that is applied to electric railway.
Summary of the invention
Technical problem to be solved by this invention provides a kind of electric traction transformer that is used for electric railway traction power supply system cophase supply; Adopt the electric traction transformer technology to realize tractive power supply system cophase supply, thoroughly solve the electrified railway electric energy quality problem.
The technical solution adopted for the present invention to solve the technical problems is:
The electric traction transformer that is used for electric railway traction power supply system cophase supply of the present invention; It is characterized in that: it comprises primary electron power transformer, high frequency traction transformer and secondary electron power transformer; The three-phase main-frequency AC power of input through the primary electron power transformer, is output as the three-phase high-frequency alternating current; This three-phase high-frequency ac is as the primary side input of high frequency traction transformer; Secondary side at the high frequency traction transformer produces two phase low pressure high-frequency alternating currents, and this two phases low pressure high-frequency alternating current is output as the power frequency AC confession tractive load that two phase phase places equate through the secondary electron power transformer.
The invention has the beneficial effects as follows; The electric traction transformer is made up of high frequency traction transformer and electronic power transformer; Utilize the characteristics that high frequency traction transformer volume is little, in light weight, contain intelligent control unit, reduce traction substation piece of smooth land area, in conjunction with digitlization traction substation technology; The high frequency traction transformer is carried out intellectuality control; The converters that utilizes the high frequency traction transformer once to be connected with secondary side is controlled electric current, voltage waveform, frequency and amplitude, solves power quality problems such as electric railway negative phase-sequence, harmonic wave, reactive power, voltage fluctuation, and control output supplies traction substation port of export both sides supply arm voltage-phase identical; Thereby when thoroughly solving the electrified railway electric energy quality problem, realize cophase supply.
Description of drawings
This specification comprises like next width of cloth accompanying drawing:
Fig. 1 is the structural representation that the present invention is used for the electric traction transformer of electric railway traction power supply system cophase supply.
Parts and numbering among the figure: primary electron power transformer 10, high frequency traction transformer 20, secondary electron power transformer 30.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
With reference to Fig. 1; The present invention is used for the electric traction transformer of electric railway traction power supply system cophase supply, and it comprises primary electron power transformer 10, high frequency traction transformer 20 and secondary electron power transformer 30, the three-phase main-frequency AC power of input; Through primary electron power transformer 10; Be output as the three-phase high-frequency alternating current, this three-phase high-frequency ac is as the input of the primary side of high frequency traction transformer 20, produces two phase low pressure high-frequency alternating currents at the secondary side of high frequency traction transformer 20; This two phases low pressure high-frequency alternating current is output as the power frequency AC confession tractive load that two phase phase places equate through secondary electron power transformer 30.
Through to primary electron power transformer 10, secondary electron power transformer 30 circuit control; Thereby realize electric current, voltage waveform, frequency and amplitude control; Solve power quality problems such as electric railway negative phase-sequence, harmonic wave, reactive power, voltage fluctuation; Make output supply the voltage-phase of traction substation port of export both sides supply arm identical, thereby when thoroughly solving the electrified railway electric energy quality problem, realize cophase supply.Primary electron power transformer 10, secondary electron power transformer 30 loops are all adopted and are handed over orthogonal (AC/DC/AC) loop among the figure, have reasonable isolation effect, allow like current device and control technology, also can adopt friendship, hand over (AC/AC) loop.
Some principles of the above electric traction transformer of originally being used for electric railway traction power supply system cophase supply of just explaining through diagrams; Be not be to the present invention be confined to shown in described concrete structure and the scope of application in; So every the modify and equivalent that might be utilized, the claim that all belongs to the present invention and applied for.
Claims (2)
1. the electric traction transformer that is used for electric railway traction power supply system cophase supply; It is characterized in that: it comprises primary electron power transformer (10), high frequency traction transformer (20) and secondary electron power transformer (30); The three-phase main-frequency AC power of input through primary electron power transformer (10), is output as the three-phase high-frequency alternating current; This three-phase high-frequency ac is as the primary side input of high frequency traction transformer (20); Secondary side at high frequency traction transformer (20) produces two phase low pressure high-frequency alternating currents, and this two phases low pressure high-frequency alternating current is output as the power frequency AC confession tractive load that two phase phase places equate through secondary electron power transformer (30).
2. the electric traction transformer that is used for electric railway traction power supply system cophase supply as claimed in claim 1 is characterized in that: said primary electron power transformer (10) and secondary electron power transformer (30) adopt and hand over, straight, return the road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220131575 CN202633969U (en) | 2012-03-31 | 2012-03-31 | Electronic traction transformer used for cophase supply in electrified railway tractive power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220131575 CN202633969U (en) | 2012-03-31 | 2012-03-31 | Electronic traction transformer used for cophase supply in electrified railway tractive power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202633969U true CN202633969U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220131575 Expired - Fee Related CN202633969U (en) | 2012-03-31 | 2012-03-31 | Electronic traction transformer used for cophase supply in electrified railway tractive power supply system |
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| CN (1) | CN202633969U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201908A (en) * | 2014-09-24 | 2014-12-10 | 武汉大学 | Solid-state transformer based locomotive AC-DC-AC traction system and method |
| CN105262141A (en) * | 2012-03-31 | 2016-01-20 | 中铁二院工程集团有限责任公司 | Electronic traction transformer for cophase power supply of traction power supply system for electrified railway |
| CN113808834A (en) * | 2021-09-09 | 2021-12-17 | 中铁二院工程集团有限责任公司 | Three-phase traction and electric power mixed type transformer for alternating current electrified rail transit engineering |
-
2012
- 2012-03-31 CN CN 201220131575 patent/CN202633969U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105262141A (en) * | 2012-03-31 | 2016-01-20 | 中铁二院工程集团有限责任公司 | Electronic traction transformer for cophase power supply of traction power supply system for electrified railway |
| CN104201908A (en) * | 2014-09-24 | 2014-12-10 | 武汉大学 | Solid-state transformer based locomotive AC-DC-AC traction system and method |
| CN113808834A (en) * | 2021-09-09 | 2021-12-17 | 中铁二院工程集团有限责任公司 | Three-phase traction and electric power mixed type transformer for alternating current electrified rail transit engineering |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20210331 |