CN201230284Y - Apparatus for implementing high voltage frequency transformer based on IGCT - Google Patents
Apparatus for implementing high voltage frequency transformer based on IGCT Download PDFInfo
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- CN201230284Y CN201230284Y CNU200820014044XU CN200820014044U CN201230284Y CN 201230284 Y CN201230284 Y CN 201230284Y CN U200820014044X U CNU200820014044X U CN U200820014044XU CN 200820014044 U CN200820014044 U CN 200820014044U CN 201230284 Y CN201230284 Y CN 201230284Y
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Abstract
The utility model relates to a device based on an IGCT to realize a high-voltage and large-power transducer. The device adopts a two-PWL power unit formed by IGCT power devices; the secondary side of a phase-shifting transformer adopts one or a plurality of IGCT power units in a series connection way; and the secondary side voltage of the transformer is 1.5 KV to 2 KV. As for a 6 KV transducer, the secondary side voltage of the phase-shifting transformer is 1750 KV, the DC-side voltages of the power units are 2500 KV, two power units of every phase are connected in series, and a power part includes six power units. The utility model has the advantages that 1) the utility model simplifies the structure of the transducer and has favorable reliability; 2) six windings are input for shifting phase, and the current in the electricity grid is harmonic; 3) the line voltage output to an electric motor is nine-level; 4) the voltage harmonics are small, an outlet transformer and an inerter are unnecessary; 5) the two-PWL power units are realized easily and have favorable reliability; 5) and the power units are in a modularization design and are easily maintained.
Description
Technical field
The utility model relates to a kind of device of realizing 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 utility model provides a kind of simple in structure, good reliability, a kind of device of realizing high-voltage high-power frequency transformator based on IGCT.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of device of realizing high-voltage high-power frequency transformator based on IGCT, the two level power unit that this device 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.
The utility model has the advantages that:
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 the utility model 6KV frequency converter.
Fig. 2 is the circuit topological structure figure of the utility model 10KV frequency converter.
Fig. 3 is the circuit topological structure figure of the utility model 3KV frequency converter.
Embodiment
A kind of device of realizing high-voltage high-power frequency transformator based on IGCT, the two level power unit that this device 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 device of realizing 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 device of realizing 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 device of realizing 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 device of realizing 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 |
|---|---|---|---|
| CNU200820014044XU CN201230284Y (en) | 2008-07-17 | 2008-07-17 | Apparatus for implementing high voltage frequency transformer based on IGCT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820014044XU CN201230284Y (en) | 2008-07-17 | 2008-07-17 | Apparatus for implementing high voltage frequency transformer based on IGCT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201230284Y true CN201230284Y (en) | 2009-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820014044XU Expired - Fee Related CN201230284Y (en) | 2008-07-17 | 2008-07-17 | Apparatus for implementing high voltage frequency transformer based on IGCT |
Country Status (1)
| Country | Link |
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| CN (1) | CN201230284Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315810A (en) * | 2011-09-08 | 2012-01-11 | 上海交通大学 | Integrated gate commutated thyristor based high-power pumped storage unit starting system |
| US9479076B2 (en) | 2013-02-14 | 2016-10-25 | Abb Schweiz Ag | Converter cell with reduced power losses, high voltage multilevel converter and associated method |
-
2008
- 2008-07-17 CN CNU200820014044XU patent/CN201230284Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315810A (en) * | 2011-09-08 | 2012-01-11 | 上海交通大学 | Integrated gate commutated thyristor based high-power pumped storage unit starting system |
| CN102315810B (en) * | 2011-09-08 | 2014-01-15 | 上海交通大学 | Integrated gate commutated thyristor based high-power pumped storage unit starting system |
| US9479076B2 (en) | 2013-02-14 | 2016-10-25 | Abb Schweiz Ag | Converter cell with reduced power losses, high voltage multilevel converter and associated method |
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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 |
Granted publication date: 20090429 Termination date: 20140717 |
|
| EXPY | Termination of patent right or utility model |