CN203840226U - High-voltage direct-current convertor station - Google Patents
High-voltage direct-current convertor station Download PDFInfo
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- CN203840226U CN203840226U CN201420164821.4U CN201420164821U CN203840226U CN 203840226 U CN203840226 U CN 203840226U CN 201420164821 U CN201420164821 U CN 201420164821U CN 203840226 U CN203840226 U CN 203840226U
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- 239000003990 capacitor Substances 0.000 claims abstract description 60
- 238000004804 winding Methods 0.000 claims abstract description 56
- 230000010363 phase shift Effects 0.000 claims description 25
- 230000010349 pulsation Effects 0.000 abstract description 4
- 210000001367 artery Anatomy 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to a high-voltage direct-current convertor station which comprises a first converter unit comprising at least one first converter transformer and at least one first converter and a second converter unit comprising at least one second converter transformer, at least one commutation capacitor and at least one second converter. The at least one first converter can be used to perform rectification and commutation on the electric energy outputted by the corresponding secondary winding of the at least one first converter transformer. The at least one second converter can be used to perform rectification and commutation on the electric energy outputted by the corresponding secondary winding of the at least one second converter transformer via the corresponding one of the at least one commutation capacitor. A first rectifier unit is in series connection with a second rectifier unit. By adopting the above topology structure, the number of low-order harmonic filters (the 11 order and the 13 order) can be reduced, and the current rated value of a 12 pulsation direct-current filter can also be reduced.
Description
Technical field
The utility model relates to HVDC (High Voltage Direct Current) converter substation, more particularly, relates to high voltage direct current converting plant or high-voltage d. c inverse transform station.
Background technology
The current conversion station of traditional HVDC (High Voltage Direct Current) transmission system be take 6 pulse waves (Graetz) that thyristor forms and is changed ripple bridge as elementary cell.In order to reduce harmonic wave, in Practical Project, conventionally adopt two 6 pulse wave converter bridges to connect in DC side, at AC, pass through two transformers connected in parallel of 30 ° of phase shifts each other: one is that Y/Y connects, and another,, for the connection of Y/ Δ, forms 12 pulse wave converters.If further reduce harmonic wave, the method conventionally adopting: a large amount of alternating current filters is installed.These alternating current filters need larger occupation of land, have increased the total cost of current conversion station; In addition, low-order harmonic filter (11 times and 13 times) is more responsive for the variation of specified a-c cycle, has increased its design difficulty and cost.
Utility model content
According to an aspect of the present utility model, a kind of HVDC (High Voltage Direct Current) converter substation is provided, and it comprises: the first inverter unit and the second inverter unit that comprises at least one second converter transformer, at least one commutating capacitor and at least one the second converter that comprise at least one first converter transformer and at least one the first converter; Wherein: described at least one first converter can be to the electric energy rectification change of current of exporting from the corresponding secondary side winding of described at least one the first converter transformer; Described at least one second converter can the electric energy rectification change of current via a corresponding output described at least one commutating capacitor to the corresponding secondary side winding from described at least one the second converter transformer; And described the first rectifier unit is connected with described the second rectifier unit.
According to another aspect of the present utility model, a kind of HVDC (High Voltage Direct Current) converter substation is provided, it comprises: comprise the first inverter unit of at least one first converter transformer, the first commutating capacitor and at least one the first converter, and comprise the second inverter unit of at least one second converter transformer, the second commutating capacitor and at least one the second converter; Wherein: one in described at least one first converter can be to the electric energy change of current of exporting from the corresponding secondary side winding of described at least one the first converter transformer; One in described at least one second converter can be to the electric energy change of current of exporting from the corresponding secondary side winding of described at least one the second converter transformer; The electric energy change of current that another in described at least one first converter can be exported via described the first commutating capacitor the corresponding secondary side winding from described at least one the first converter transformer; The electric energy change of current that another in described at least one second converter can be exported via described the second commutating capacitor the corresponding secondary side winding from described at least one the second converter transformer; And described the first rectifier unit is connected with described the second rectifier unit.
By adopting above topology structure, the quantity of low-order harmonic filter (11 times and 13 times) can reduce, and the current rating of 12 pulsating direct current filters also can reduce.
Accompanying drawing explanation
Fig. 1 illustrates according to the HVDC (High Voltage Direct Current) converter substation of an embodiment of the present utility model;
Fig. 2 illustrates the HVDC (High Voltage Direct Current) converter substation according to another embodiment of the present utility model;
Fig. 3 illustrates the HVDC (High Voltage Direct Current) converter substation according to another embodiment of the present utility model; With
Fig. 4 illustrates the HVDC (High Voltage Direct Current) converter substation according to another embodiment of the present utility model.
Embodiment
Fig. 1 illustrates according to the HVDC (High Voltage Direct Current) converter substation of an embodiment of the present utility model.As shown in Figure 1, HVDC (High Voltage Direct Current) converter substation 1 comprises the first inverter unit 10 and the second inverter unit 11 being connected in series.According to different control strategies, the first inverter unit 10 and the second inverter unit 11 can be the direct voltage of series connection by AC energy rectification; Or be two-way three-phase alternating voltage by the inversion of high voltage direct current electric energy.The first inverter unit 10 comprises the first inverter unit of at least one first converter transformer and at least one the first converter, in current embodiment, the first inverter unit 10 comprises first converter transformer 100 and two the first converters 101,102; The second inverter unit 11 comprises at least one second converter transformer, at least one commutating capacitor and at least one the second converter, in current embodiment, the second inverter unit 11 comprises second converter transformer 110, two 113,114 and two the second converters 111,112 of commutating capacitor.The first converter 101,102 can be to the electric energy change of current of exporting from the corresponding secondary side winding of the first converter transformer 100; In current embodiment, the first inverter unit 10 comprises 6 pulse wave the first converters 101,102 of two series connection, it is connected and Angle connection with two secondary side winding 100a, the 100bY shape of the first converter transformer 100 respectively, from outside, 6 pulse wave the first converters 101,102 of two series connection can form 12 pulse wave converters thus.The second converter 111,112 can the electric energy change of current via a corresponding output commutating capacitor to the corresponding secondary side winding from the second converter transformer, in current embodiment, the second inverter unit 11 comprises 6 pulse wave the second converters 111,112 of two series connection, its by two commutating capacitors 113,114, be connected with two secondary side winding 110a, the 110b Y shape of the second converter transformer 110 respectively and Angle connection thus from outside, 6 pulse wave the second converters 111,112 of two series connection can form 12 pulse wave converters.By use 12 pulsation electrical network commutation converters (the first inverter unit 10) and install additional commutating capacitor 12 pulsation electric capacity commutation converters (the second inverter unit 11), can in larger range of operation, be formed on the phase shift of the secondary side alternating voltage of the first inverter unit 10 and the second inverter unit 11, thereby realize 24 pulsation operations of HVDC (High Voltage Direct Current) converter substation 1.By adopting above topology structure, the quantity of low-order harmonic filter (11 times and 13 times) can reduce, and the current rating of 12 pulsating direct current filters also can reduce.
The first inverter unit 10 can adopt electrical network commutation converter (Line commutated converter, LCC), the second inverter unit 11 can adopt non-adjustable or adjustable electric capacity commutation converter (the capacitor commutated converter of commutation capacitor capacitor value, CCC), (variable capacitance can adopt thyristor control capacitor or IGBT to control the schemes such as series capacitor); The first converter transformer 100 and the second converter transformer 110 can be respectively three winding converter transformers.
The capacitance of commutating capacitor 113,114 is determined according to the phase shift between the secondary side alternating voltage of the second converter transformer 110 and the input side alternating voltage of corresponding the second converter 111,112.When direct current power is lower, direct current is also also less by the phase shift reducing and produced by commutation capacitor.Yet when direct current increases, the also corresponding increase of phase shift that commutation capacitor produces.This variation tendency is consistent with main ac filter demand (11 times and 13 filtering).By selecting suitable commutation capacitor value, can realize the phase shift of alternating voltage in four outlet chambers of the first converter transformer and the second converter transformer secondary side, thereby realize 24 arteries and veins operations of this utmost point current transformer.
Approximate 15 ° of the phase shift each other of the AC voltage of the first converter 101,102 and the second converter 111,112, form thus the current transformer of 24 arteries and veins operations.Specifically, the phase shift of the secondary side winding 100a voltage of the first converter transformer 100 and the first converter 101 AC voltages is 0 °, the phase shift of the secondary side winding 100b voltage of the first converter transformer 100 and the first converter 102 AC voltages is 30 °, the phase shift of the secondary side winding 110a voltage of the second converter transformer 110 and the second converter 111 AC voltages is 15 °, and the phase shift of the secondary side winding 110b voltage of the second converter transformer 110 and the second converter 112 AC voltages is 45 °.
Fig. 2 illustrates the HVDC (High Voltage Direct Current) converter substation according to another embodiment of the present utility model.Difference between HVDC (High Voltage Direct Current) converter substation 2 shown in HVDC (High Voltage Direct Current) converter substation 1 shown in Fig. 1 and Fig. 2 is that the first converter transformer 100 is by two the first converter transformers 200 independently, 201 substitute, the second converter transformer 110 is by two the second converter transformers 210 independently, 211 substitute, two the first converters 101, 102 respectively with two the first converter transformers 200, 201 secondary side winding Y shape connects and Angle connection, and two the second converters 111, 112 respectively by two commutating capacitors 113, 114 and two the second converter transformers 210, 211 secondary side winding Y shape connects and Angle connection.Wherein, the first converter transformer 200,201 and the second converter transformer 210,211 are respectively two winding converter transformers.
Fig. 3 illustrates the HVDC (High Voltage Direct Current) converter substation according to another embodiment of the present utility model.As shown in Figure 3, HVDC (High Voltage Direct Current) converter substation 3 comprises the first inverter unit 30 and the second inverter unit 31 being connected in series.According to different control strategies, the first inverter unit 30 and the second inverter unit 31 can be the direct voltage of series connection by AC energy rectification; Or be two-way three-phase alternating voltage by the inversion of high voltage direct current electric energy.The first inverter unit 30 comprises the first inverter unit of at least one first converter transformer and at least one the first converter, in current embodiment, the first inverter unit 30 comprises first converter transformer 300, the first commutating capacitor 303 and two first converters 301,302; The second inverter unit 31 comprises at least one second converter transformer, at least one commutating capacitor and at least one the second converter, in current embodiment, the second inverter unit 31 comprises second converter transformer 310, the second commutating capacitor 313 and two the second converters 311,312.The first converter 301, one in 302 can be to the electric energy change of current of exporting from the corresponding secondary side winding of at least one the first converter transformer 300, the first converter 301, the electric energy change of current that another in 302 can be exported via described the first commutating capacitor the corresponding secondary side winding from least one the first converter transformer 300, in current embodiment, the first converter transformer 300 is three winding converter transformers, the first inverter unit 30 comprises 6 pulse wave the first converters 301 of two series connection, 302, wherein the first converter 301 is connected with a secondary side winding 300aY shape of the first converter transformer 300, the first converter 302 is connected with another secondary side winding 300bY shape of the first converter transformer by the first commutating capacitor 303.The second converter 311 can be to the electric energy change of current of exporting from the corresponding secondary side winding of at least one the second converter transformer 310, the electric energy change of current that the second converter 312 can be exported via the second commutating capacitor 313 the corresponding secondary side winding from least one the second converter transformer 310, in current embodiment, the second converter transformer 310 is three winding converter transformers, the second inverter unit 31 comprises 6 pulse wave the second converters 311 of two series connection, 312, a secondary side winding 310a Angle connection of the second converter 311 and the second converter transformer 310, the second converter 312 is by another secondary side winding 310b Angle connection of the second commutating capacitor 313 and the second converter transformer 310.
The capacitance of commutating capacitor can be non-adjustable or adjustable, and it can adopt thyristor control capacitor or IGBT to control the schemes such as series capacitor.
The capacitance of the first commutating capacitor 303 and the second commutating capacitor 313 is determined according to the phase shift between the secondary side alternating voltage of the first converter transformer 300 and the second converter transformer 310 and corresponding the first converter 302 and the input side alternating voltage of the second converter 312 respectively.When direct current power is lower, direct current is also also less by the phase shift reducing and produced by commutation capacitor.Yet when direct current increases, the also corresponding increase of phase shift that commutation capacitor produces.This variation tendency is consistent with main ac filter demand (11 times and 13 filtering).By selecting suitable commutation capacitor value, or adjust commutation capacitor value according to the voltage of AC network, can realize the phase shift of alternating voltage in four outlet chambers of the first inverter unit and the second inverter unit secondary side, thereby realize 24 pulsed operation of this utmost point.
Between the AC voltage of the first converter 301,302 and the second converter 311,312, phase shift is 15 ° each other, forms thus the current transformer of 24 arteries and veins operations.Specifically, the phase shift of the secondary side winding 300a voltage of the first converter transformer 300 and the first converter 301 AC voltages is 0 °, the phase shift of the secondary side winding 300b voltage of the first converter transformer 300 and the first converter 302 AC voltages is 15 °, the phase shift of the secondary side winding 310a voltage of the second converter transformer 310 and the second converter 311 AC voltages is 30 °, and the phase shift of the secondary side winding 310b voltage of the second converter transformer 310 and the second converter 312 AC voltages is 45 °.
Fig. 4 illustrates the HVDC (High Voltage Direct Current) converter substation according to another embodiment of the present utility model.Difference between HVDC (High Voltage Direct Current) converter substation 4 shown in HVDC (High Voltage Direct Current) converter substation 3 shown in Fig. 3 and Fig. 4 is the first converter transformer 300, and by two, independently the first converter transformer 400,401 is alternative, independently the second converter transformer 410,411 is alternative by two for the second converter transformer 310, the first converter 301 is connected with the secondary side winding Y shape of the first converter transformer 400, and the first converter 302 is connected with the secondary side winding Y shape of the first converter transformer 401 by the first commutating capacitor 303; The secondary side winding Angle connection of the second converter 311 and the second converter transformer 410, the second converter 312 is by the secondary side winding Angle connection of the second commutating capacitor 313 and the second converter transformer 411.
Although illustrate and described the utility model with reference to some preferred embodiment of the present utility model, but it will be appreciated by those skilled in the art that, in the situation that not deviating from spirit and scope of the present utility model as defined in appended claims, can to it, make a variety of changes in the form and details.
Claims (14)
1. a HVDC (High Voltage Direct Current) converter substation, is characterized in that comprising:
The first inverter unit that comprises at least one first converter transformer and at least one the first converter; With
The second inverter unit that comprises at least one second converter transformer, at least one commutating capacitor and at least one the second converter;
Wherein:
Described at least one first converter can be to the electric energy change of current of exporting from the corresponding secondary side winding of described at least one the first converter transformer;
Described at least one second converter can the electric energy change of current via a corresponding output described at least one commutating capacitor to the corresponding secondary side winding from described at least one the second converter transformer; And
The first rectifier unit is connected with the second rectifier unit.
2. HVDC (High Voltage Direct Current) converter substation as claimed in claim 1, is characterized in that:
The capacitance of described at least one commutating capacitor is adjustable.
3. HVDC (High Voltage Direct Current) converter substation as claimed in claim 1, is characterized in that:
The described change of current is inversion or rectification.
4. HVDC (High Voltage Direct Current) converter substation as claimed in claim 1, is characterized in that comprising:
Two commutating capacitors;
First converter transformer;
Second converter transformer;
Wherein:
Described the first inverter unit comprises 6 pulse wave the first converters of two series connection, and it is connected and Angle connection with two secondary side winding Y shapes of described the first converter transformer respectively;
Described the second inverter unit comprises 6 pulse wave the second converters of two series connection, and it is connected and Angle connection with two secondary side winding Y shapes of described the second converter transformer by described two commutating capacitors respectively.
5. HVDC (High Voltage Direct Current) converter substation as claimed in claim 1, is characterized in that comprising:
Two commutating capacitors;
Two the first converter transformers;
Two the second converter transformers;
Wherein:
Described the first inverter unit comprises 6 pulse wave the first converters of two series connection, and it is connected and Angle connection with the secondary side winding Y shape of described two the first converter transformers respectively;
Described the second inverter unit comprises 6 pulse wave the second converters of two series connection, and it is connected and Angle connection with the secondary side winding Y shape of described two the second converter transformers by described two commutating capacitors respectively.
6. the HVDC (High Voltage Direct Current) converter substation as described in claim 4 or 5, is characterized in that:
The capacitance of described commutating capacitor is determined according to the phase shift between the secondary side alternating voltage of described the second converter transformer and the input side alternating voltage of corresponding described the second converter.
7. HVDC (High Voltage Direct Current) converter substation as claimed in claim 6, is characterized in that:
Described phase shift is 15 degree.
8. a HVDC (High Voltage Direct Current) converter substation, is characterized in that comprising:
The first inverter unit that comprises at least one first converter transformer, the first commutating capacitor and at least one the first converter; With
The second inverter unit that comprises at least one second converter transformer, the second commutating capacitor and at least one the second converter;
Wherein:
One in described at least one first converter can be to the electric energy change of current of exporting from the corresponding secondary side winding of described at least one the first converter transformer;
One in described at least one second converter can be to the electric energy change of current of exporting from the corresponding secondary side winding of described at least one the second converter transformer;
The electric energy change of current that another in described at least one first converter can be exported via described the first commutating capacitor the corresponding secondary side winding from described at least one the first converter transformer;
The electric energy change of current that another in described at least one second converter can be exported via described the second commutating capacitor the corresponding secondary side winding from described at least one the second converter transformer; And
The first rectifier unit is connected with the second rectifier unit.
9. HVDC (High Voltage Direct Current) converter substation as claimed in claim 8, is characterized in that comprising:
First converter transformer;
Second converter transformer;
Wherein:
Described the first inverter unit comprises 6 pulse wave the first converters of two series connection, one of them is connected with a secondary side winding Y shape of described the first converter transformer, and wherein another is connected with another secondary side winding Y shape of described the first converter transformer by described the first commutating capacitor;
Described the second inverter unit comprises 6 pulse wave the second converters of two series connection, a secondary side winding Angle connection of one of them and described the second converter transformer, wherein another is by another secondary side winding Angle connection of described the second commutating capacitor and described the second converter transformer.
10. HVDC (High Voltage Direct Current) converter substation as claimed in claim 1, is characterized in that comprising:
Two the first converter transformers;
Two the second converter transformers;
Wherein:
Described the first inverter unit comprises 6 pulse wave the first converters of two series connection, one of them is connected with the secondary side winding Y shape of in described two the first converter transformers, and wherein another another secondary side winding Y shape by described the first commutating capacitor and described two the first converter transformers is connected;
Described the second inverter unit comprises 6 pulse wave the second converters of two series connection, the secondary side winding Angle connection of one of one of them and described two the second converter transformers, wherein another is by another secondary side winding Angle connection of described the second commutating capacitor and described two the second converter transformers.
11. HVDC (High Voltage Direct Current) converter substation as described in claim 9 or 10, is characterized in that:
The capacitance of described the first commutating capacitor is determined according to the phase shift between the secondary side alternating voltage of described the first converter transformer and the input side alternating voltage of corresponding described the first converter; And
The capacitance of described the second commutating capacitor is determined according to the phase shift between the secondary side alternating voltage of described the second converter transformer and the input side alternating voltage of corresponding described the second converter.
12. HVDC (High Voltage Direct Current) converter substation as claimed in claim 11, is characterized in that:
Described phase shift is 15 degree.
13. HVDC (High Voltage Direct Current) converter substation as claimed in claim 8, is characterized in that:
The capacitance of described at least one commutating capacitor is adjustable.
14. HVDC (High Voltage Direct Current) converter substation as claimed in claim 8, is characterized in that:
The described change of current is inversion or rectification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420164821.4U CN203840226U (en) | 2014-04-04 | 2014-04-04 | High-voltage direct-current convertor station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420164821.4U CN203840226U (en) | 2014-04-04 | 2014-04-04 | High-voltage direct-current convertor station |
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| Publication Number | Publication Date |
|---|---|
| CN203840226U true CN203840226U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420164821.4U Expired - Lifetime CN203840226U (en) | 2014-04-04 | 2014-04-04 | High-voltage direct-current convertor station |
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| Country | Link |
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| CN (1) | CN203840226U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753082A (en) * | 2015-03-12 | 2015-07-01 | 华南理工大学 | Flexible high voltage direct current transmission converter topology used for wind power plant grid connection |
| CN107667460A (en) * | 2015-05-18 | 2018-02-06 | Abb瑞士股份有限公司 | Method and apparatus for suppressing the voltage harmonic in more level power converters |
-
2014
- 2014-04-04 CN CN201420164821.4U patent/CN203840226U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753082A (en) * | 2015-03-12 | 2015-07-01 | 华南理工大学 | Flexible high voltage direct current transmission converter topology used for wind power plant grid connection |
| CN107667460A (en) * | 2015-05-18 | 2018-02-06 | Abb瑞士股份有限公司 | Method and apparatus for suppressing the voltage harmonic in more level power converters |
| CN107667460B (en) * | 2015-05-18 | 2020-01-10 | Abb瑞士股份有限公司 | Method, apparatus, control unit and medium for a multilevel power converter |
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