CN101662220A - Voltage source type filter converter - Google Patents
Voltage source type filter converter Download PDFInfo
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- CN101662220A CN101662220A CN200910308066A CN200910308066A CN101662220A CN 101662220 A CN101662220 A CN 101662220A CN 200910308066 A CN200910308066 A CN 200910308066A CN 200910308066 A CN200910308066 A CN 200910308066A CN 101662220 A CN101662220 A CN 101662220A
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Abstract
The invention discloses a voltage source type filter converter which comprises a transformer, a high-pass filter, a bridge-type current commutation valve block comprising a self-shutoff power device and a direct current capacitor. The transformer adopts star-like/extended-triangle or star-like/triangle/triangle wiring; the high-pass filter is connected with an extended winding of the extended-triangle and an angle joint of the triangle winding of the transformer in parallel or is connected with a third winding of the transformer in parallel. The voltage source type filter converter has two topological structures, can make two direct current power transmission systems with the novel topological structure, and can effectively reduce the adverse effect of harmonic waves on a current commutation resistor and the transformer.
Description
Technical field
The present invention relates to a kind of voltage source type filter converter.
Background technology
Along with the raising of large power all-controlled type power electronic device manufacture level and with the squash type polymer is the appearance of the Novel DC cable of insulating material, has from the voltage-source type converter (VSC) of commutation ability to have caused that in direct current transmission and distribution and flexible AC transmission Application for Field academia and engineering circle pay close attention to widely.At present, the main electric equipment of voltage-source type converter generally is three-phase bridge converter valve group, the direct current capacitor four parts formation by change of current reactor, high pass filter, employing turn-off device (GTO, IGBT, IGCT etc.).Wherein, for realize and the contact of electrical network and electrical network and converter between the conversion of electric current and voltage, transformer also is absolutely necessary.In some cases, the change of current reactor in the voltage-source type converter is directly replaced with transformer, at this moment, transformer has the function that realizes active power and reactive power exchange between electrical network and converter concurrently.Though present voltage-source type converter has reasonable four quadrant running ability, to compare with the current source type converter, the harmonic ratio of generation is less, and required filter capacity is relatively also smaller.But, undeniablely be, because the power electronic device unintentional nonlinearity characteristic that the converter valve group is adopted, the voltage-source type converter still is a harmonic source for electrical network, and its size to the current harmonics of electrical network output is relevant with the factors such as harmonic voltage, switching frequency and access impedance of its generation.Particularly, when its output fundamental current is 0, will become a pure harmonic source.And; the harmonic wave that the voltage-source type converter produces is high-frequency harmonic normally; this not only can aggravate supplementary load loss, the noise and vibration of change of current reactor and/or transformer, and can bring many adverse effects to control and protection equipment, communication equipment and quality of residents'life on every side.
Summary of the invention
In order to solve the above-mentioned technical problem that present voltage-source type converter exists, the invention provides a kind of voltage source type filter converter that has.The present invention can solve harmonic wave to the change of current reactor in the existing voltage-source type converter and the adverse effect of transformer.
The technical scheme that the present invention solves the problems of the technologies described above is: comprise transformer, high pass filter, contain bridge-type converter valve group, direct current capacitor four parts from the switch-off power device, the output of described transformer connects the input of bridge-type converter valve group, the output of bridge-type converter valve group also connects direct current capacitor, high pass filter is connected on corner connection place of Circuit Fault on Secondary Transformer extend-triangle winding, perhaps the tertiary winding place of transformer.
In the above-mentioned voltage source type filter converter, described transformer adopting is star-like/the extend-triangle wiring.
In the above-mentioned voltage source type filter converter, described transformer adopting star/delta/delta connection.
Technique effect of the present invention is: the present invention is provided with high pass filter in corner connection place of prolonging limit winding and delta windings of the extend-triangle winding of the transformer of voltage source type filter converter, when the harmonic current that produces of voltage-source type converter acts on the transformer of converter AC side and supporting high pass damping branch road thereof like this, because the equivalent impedance of the corner connection delta windings of Circuit Fault on Secondary Transformer extend-triangle wiring or the equivalent impedance of the secondary side tertiary winding are far smaller than the equivalent impedance of first side winding, and, because the corner connection delta windings or the tertiary winding have inserted the damping filter branch that high order harmonic component is had the high pass effect, this has just limited higher harmonic current and has only circulated in the closed circuit of corner connection delta windings or the tertiary winding and damping filter branch formation, and the content of higher harmonic current is very little in the first side winding.This technique effect is that present voltage-source type converter can't be accomplished, for existing voltage-source type converter, harmonic current is own circulation in change of current reactor or Transformer Winding, can not get any inhibition.
The present invention is further illustrated below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is first topological structure of the present invention.
Fig. 2 is second topological structure of the present invention.
Fig. 3 is the winding diagram of transformer and high pass filter in first topological structure of the present invention.
Fig. 4 is the winding diagram of transformer and high pass filter in second topological structure of the present invention.
Fig. 5 is first DC transmission system topological structure that the present invention constitutes.
Fig. 6 is second DC transmission system topological structure that the present invention constitutes.
Embodiment
Referring to Fig. 1,1 expression secondary side winding adopts the novel transformer of extend-triangle wiring, it not only has the function that realizes voltage current transformation between electrical network and converter, has also made full use of the leakage reactance of self, has had the function of change of current reactor in the existing voltage-source type converter concurrently; 2 expressions have the high pass filter of damping to high order harmonic component.1 and 2 concrete connection plan as shown in Figure 3.The bridge-type converter valve group of self-turn-off device is adopted in 3 expressions, 4 expression direct current capacitors.Constituted first kind of topological structure of the present invention jointly by 1,2,3,4.
In Fig. 2,5 expression three-winding transformers, similarly, it not only has the function of contact external electrical network, has also had the function of change of current reactor in the existing voltage-source type converter concurrently.6 expressions have the high pass filter of damping to high order harmonic component.5 and 6 concrete connection plan as shown in Figure 4.Similarly, the bridge-type converter valve group of self-turn-off device is adopted in 7 expressions, 8 expression direct current capacitors.Constituted second kind of topological structure of the present invention jointly by 5,6,7,8.
Hence one can see that, two kinds of voltage source type filter converters that the present invention proposes have the feature of tangible integrated design, it is equivalent to integrated novel transformer and the supporting damping filter branch thereof of turning to of change of current reactor, high pass damping filter, the transformer of present voltage-source type converter AC side, this is when being applied to actual direct-current transmission converter station, help the modularization encapsulation, save the land used resource of current conversion station, reduce the cost of investment of current conversion station.
When Fig. 5 represents that the present invention is applied to direct current transportation, first kind of voltage-source type DC transmission system of formation with topological structure.Among the figure, the voltage-source type current conversion station 1 of first kind of topological structure of the present invention shown in Figure 1 is adopted in 13 expressions; 14 expression DC power transmission line; The voltage-source type current conversion station 2 of first kind of topological structure of the present invention shown in Figure 1 is adopted in 15 expressions.When current conversion station 1 moves as converting plant, be responsible for alternating current is transformed into direct current, at this moment, current conversion station 2 will move as Inverter Station, be responsible for carrying the direct current of coming to convert alternating current to by DC power transmission line from current conversion station 1.On the contrary, when electric energy when current conversion station 2 is delivered to current conversion station 1, current conversion station 2 is as the converting plant operation, and current conversion station 1 moves as Inverter Station.
When Fig. 6 represents that the present invention is applied to direct current transportation, second kind of voltage-source type DC transmission system of formation with topological structure.Among the figure, the voltage-source type current conversion station 1 of second kind of topological structure of the present invention shown in Figure 2 is adopted in 16 expressions; 17 expression DC power transmission line; The voltage-source type current conversion station 2 of second kind of topological structure of the present invention shown in Figure 2 is adopted in 18 expressions.The process of the conversion of alternating current-direct current electric energy and course of conveying and above-mentioned first kind of voltage-source type DC transmission system with topological structure shown in Figure 5 is similar.
Claims (3)
1. voltage source type filter converter, it is characterized in that: comprise transformer, high pass filter, contain bridge-type converter valve group, direct current capacitor four parts from the switch-off power device, the output of described transformer connects the input of bridge-type converter valve group, the output of bridge-type converter valve group also connects direct current capacitor, high pass filter is connected on corner connection place of Circuit Fault on Secondary Transformer extend-triangle winding, perhaps the tertiary winding place of transformer.
2. voltage source type filter converter according to claim 1 is characterized in that: described transformer adopting is star-like/and the extend-triangle wiring.
3. voltage source type filter converter according to claim 1 is characterized in that: described transformer adopting star/delta/delta connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910308066A CN101662220A (en) | 2009-10-01 | 2009-10-01 | Voltage source type filter converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910308066A CN101662220A (en) | 2009-10-01 | 2009-10-01 | Voltage source type filter converter |
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| Publication Number | Publication Date |
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| CN101662220A true CN101662220A (en) | 2010-03-03 |
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| CN200910308066A Pending CN101662220A (en) | 2009-10-01 | 2009-10-01 | Voltage source type filter converter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066587A (en) * | 2012-12-13 | 2013-04-24 | 国网智能电网研究院 | Optimal configuration method of modular multi-level flexible direct current system |
| CN103956739A (en) * | 2014-04-25 | 2014-07-30 | 湖南大学 | Method for achieving electric power filtering and reactive compensation of direct-current transmission converter station |
| CN108111029A (en) * | 2017-12-20 | 2018-06-01 | 全球能源互联网研究院有限公司 | A kind of change of current valve tower of saturable reactor centralized arrangement |
| CN116845894A (en) * | 2023-08-30 | 2023-10-03 | 国网智能电网研究院有限公司 | High-pass filter |
| CN116865268A (en) * | 2023-08-30 | 2023-10-10 | 国网智能电网研究院有限公司 | Band-pass filter |
-
2009
- 2009-10-01 CN CN200910308066A patent/CN101662220A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066587A (en) * | 2012-12-13 | 2013-04-24 | 国网智能电网研究院 | Optimal configuration method of modular multi-level flexible direct current system |
| CN103066587B (en) * | 2012-12-13 | 2015-08-05 | 国网智能电网研究院 | A kind of Optimal Configuration Method of modular multi-level flexible direct current system |
| CN103956739A (en) * | 2014-04-25 | 2014-07-30 | 湖南大学 | Method for achieving electric power filtering and reactive compensation of direct-current transmission converter station |
| CN108111029A (en) * | 2017-12-20 | 2018-06-01 | 全球能源互联网研究院有限公司 | A kind of change of current valve tower of saturable reactor centralized arrangement |
| CN108111029B (en) * | 2017-12-20 | 2024-02-13 | 全球能源互联网研究院有限公司 | Converter valve tower with centralized arrangement of saturation reactors |
| CN116845894A (en) * | 2023-08-30 | 2023-10-03 | 国网智能电网研究院有限公司 | High-pass filter |
| CN116865268A (en) * | 2023-08-30 | 2023-10-10 | 国网智能电网研究院有限公司 | Band-pass filter |
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Open date: 20100303 |