CN101630921A - Method for realizing high-voltage high-power frequency transformator based on IGCT - Google Patents
Method for realizing high-voltage high-power frequency transformator based on IGCT Download PDFInfo
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- CN101630921A CN101630921A CN200810012344A CN200810012344A CN101630921A CN 101630921 A CN101630921 A CN 101630921A CN 200810012344 A CN200810012344 A CN 200810012344A CN 200810012344 A CN200810012344 A CN 200810012344A CN 101630921 A CN101630921 A CN 101630921A
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Abstract
The invention relates to a method for realizing a high-voltage high-power frequency transformator based on IGCT. The method adopts two level power units consisting of IGCT power devices, the secondary side of a phase-shifting transformer adopts one or more IGCT power units connected in series, and the voltage on the secondary side of the transformer is equal to 1.5 to 2 kV. As for a 6kV frequency transformator, the voltage on the secondary side of the phase-shifting transformer is equal to 1,750V, and the voltage on the direct current sides of the power units is equal to 2,500V; moreover, two power units of each phase are connected in series, and a power part has six power units in all. The method has the advantages that (1) frequency transformator structure is simplified to ensure ideal reliability; (2) 6-winding phase shifting and power grid current harmonic are input; (3) line voltage output to an electric motor is equal to 9 level; (4) voltage harmonic is small, which does not require an output transformer and an inverter; (5) two level IGCT power units are easy to realize and have ideal reliability; and (6) the power units adopt modular design and are convenient for maintenance.
Description
Technical field
The present invention relates to a kind of method that realizes high-voltage high-power frequency transformator.
Background technology
At present, high-voltage high-power frequency transformator is a crucial application.And the most most about 5000kW based on its power grade of frequency converter of IGBT, power just is difficult to realize with IGBT at 10000kW and above high voltage converter.At present, international major company such as ABB has all released the three-level converter based on IGCT.But under the high-power application conditions, the reliability of three Level Technology awaits to improve at home.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, good reliability, a kind of method that realizes high-voltage high-power frequency transformator based on IGCT.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of method that realizes high-voltage high-power frequency transformator based on IGCT, the two level power unit that this method adopts the IGCT power device to form, the mode that the phase shifting transformer secondary side adopts one or more IGCT power cells to connect, Circuit Fault on Secondary Transformer voltage are (1.5-2) kV.
For the 6kV frequency converter, phase shifting transformer secondary side voltage 1750V, power cell dc voltage 2500V, 2 power unit cascades of every phase, power section is totally 6 power cells.
For the 10kV frequency converter, phase shifting transformer secondary side voltage 1900V, power cell dc voltage 2700V, 3 power unit cascades of every phase, power section is totally 9 power cells.
For the 3KV frequency converter, phase shifting transformer secondary side voltage 1750V, power cell dc voltage 2500V whenever adopts 1 power cell mutually, and power section is totally 3 power cells.
Advantage of the present invention is:
1) simplified the structure of frequency converter, good reliability.
2) input 6 winding phase shifts, the power network current harmonic wave is little.
3) the line voltage that outputs to motor is 9 level, and voltage harmonic is little, need not output transformer and inverter.
4) 2 level IGCT power cells are easy to realize good reliability.
5) power unit module design is convenient to safeguard.
Description of drawings
Fig. 1 is the circuit topological structure figure of 6KV frequency converter of the present invention.
Fig. 2 is the circuit topological structure figure of 10KV frequency converter of the present invention.
Fig. 3 is the circuit topological structure figure of 3KV frequency converter of the present invention.
Embodiment
A kind of method that realizes high-voltage high-power frequency transformator based on IGCT, the two level power unit that this method adopts the IGCT power device to form, the mode that the phase shifting transformer secondary side adopts one or more IGCT power cells to connect, Circuit Fault on Secondary Transformer voltage are (1.5-2) KV.The IGCT power device adopts the 5SHY35L4510 of ABB, and its electric current and voltage grade is 4500V/4000A.
The concrete course of work is: with the 6kV frequency converter is example, see Fig. 1, line voltage is reduced to 1750V through phase shifting transformer, through rectifier bridge D rectification, enter the buffer circuit of being made up of capacitor Cc, Cd, inductance L c, resistance R c, diode Ds then, the two level power unit be made up of the IGCT inverter bridge of signal of telecommunication input then whenever are composed in series by two IGCT power cells, form alternating voltage, high pressure is exported to motor then.
Each two level power unit is made up of rectifier bridge, voltage stabilizing circuit, IGCT inverter bridge, voltage stabilizing circuit inserts IGCT inverter bridge input, resistance R c connects with diode Ds, two ends are in parallel with inductance L c, between resistance R c and diode Ds, be connected to capacitor Cc, another termination capacitor of capacitor Cc Cd; Capacitor Cd is the input of termination inductance L c and resistance R c in addition.The IGCT inverter bridge is made of four inverse parallel unit of being made up of IGCT device and diode Dr.
1) 6kV frequency converter
See Fig. 1, for the 6kV frequency converter, phase shifting transformer secondary side voltage 1750V, power cell dc voltage 2500V, 2 power unit cascades of every phase, power section only needs 6 power cells.Phase shifting transformer is totally 6 secondary windings.
Like this, the ceiling voltage of each power cell output is 1750V, and 2 power unit cascades just can be exported 3500V, just in time corresponding to the phase voltage of 6kV system.
For the IGCT of 4500V/4000A, its long-term work current effective value can reach 1500A.So the capacity of frequency converter is
S＝1.732×6000×1500＝15000kVA
Consider the power factor of motor, this kind frequency converter can easily drive the motor of 12000kW.
2) 10kV frequency converter
See Fig. 2, for the 10kV frequency converter, phase shifting transformer secondary side voltage 1900V, power cell dc voltage 2700V, 3 power unit cascades of every phase, power section only needs 9 power cells.Phase shifting transformer is totally 9 secondary windings.
Like this, the ceiling voltage of each power cell output is 1900V, and 3 power unit cascades just can be exported 5700V, just in time corresponding to the phase voltage of 10kV system.
Requiring the occasion of high reliability, every phase 4 IGCT power cells of also can connecting.
For the IGCT of 4500V/4000A, its long-term work current effective value can reach 1500A.So the capacity of frequency converter is
S＝1.732×10000×1500＝26000kVA
Consider the power factor of motor, this kind frequency converter can easily drive the motor of 22000kW.
3) 3kV frequency converter
See Fig. 3, for the 3kV frequency converter, the every form that adopts a power cell mutually of transformer, power section only need 3 power cells.
Claims (4)
1, a kind of method that realizes high-voltage high-power frequency transformator based on IGCT, it is characterized in that, the two level power unit that this method adopts the IGCT power device to form, the mode that the phase shifting transformer secondary side adopts one or more IGCT power cells to connect, Circuit Fault on Secondary Transformer voltage are (1.5-2) KV.
2, a kind of method that realizes high-voltage high-power frequency transformator based on IGCT according to claim 1 is characterized in that, for the 6KV frequency converter, phase shifting transformer secondary side voltage 1750V, power cell dc voltage 2500V, 2 power unit cascades of every phase, power section is totally 6 power cells.
3, a kind of method that realizes high-voltage high-power frequency transformator based on IGCT according to claim 1, it is characterized in that, for the 10KV frequency converter, phase shifting transformer secondary side voltage 1900V, power cell dc voltage 2700V, 3 power unit cascades of every phase, power section is totally 9 power cells.
4, a kind of method that realizes high-voltage high-power frequency transformator based on IGCT according to claim 1 is characterized in that, for the 3KV frequency converter, phase shifting transformer secondary side voltage 1750V, power cell dc voltage 2500V whenever adopts 1 power cell mutually, and power section is totally 3 power cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810012344A CN101630921A (en) | 2008-07-17 | 2008-07-17 | Method for realizing high-voltage high-power frequency transformator based on IGCT |
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| CN200810012344A CN101630921A (en) | 2008-07-17 | 2008-07-17 | Method for realizing high-voltage high-power frequency transformator based on IGCT |
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| CN101630921A true CN101630921A (en) | 2010-01-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199775A (en) * | 2013-03-26 | 2013-07-10 | 上海交通大学 | Five level single round high-power anti-explosion synchronous motor frequency conversion speed regulation system based on integrated gate commutated thyristor (IGCT) |
| CN105006954A (en) * | 2015-08-14 | 2015-10-28 | 南车株洲电力机车研究所有限公司 | IGCT (integrated gate commutated thyristor) based H-bridge power module |
| CN105429466A (en) * | 2015-12-03 | 2016-03-23 | 北京赛思亿电气科技有限公司 | High voltage direct current power supply adopting cascade structure |
-
2008
- 2008-07-17 CN CN200810012344A patent/CN101630921A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199775A (en) * | 2013-03-26 | 2013-07-10 | 上海交通大学 | Five level single round high-power anti-explosion synchronous motor frequency conversion speed regulation system based on integrated gate commutated thyristor (IGCT) |
| CN103199775B (en) * | 2013-03-26 | 2016-05-04 | 上海交通大学 | Simplex winding high-power explosion-proof synchronous motor frequency conversion speed-adjusting system based on IGCT five level |
| CN105006954A (en) * | 2015-08-14 | 2015-10-28 | 南车株洲电力机车研究所有限公司 | IGCT (integrated gate commutated thyristor) based H-bridge power module |
| CN105429466A (en) * | 2015-12-03 | 2016-03-23 | 北京赛思亿电气科技有限公司 | High voltage direct current power supply adopting cascade structure |
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Open date: 20100120 |