CN201877825U - Multi-tower high-voltage direct-current filter capacitor device - Google Patents
Multi-tower high-voltage direct-current filter capacitor device Download PDFInfo
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- CN201877825U CN201877825U CN2010206673233U CN201020667323U CN201877825U CN 201877825 U CN201877825 U CN 201877825U CN 2010206673233 U CN2010206673233 U CN 2010206673233U CN 201020667323 U CN201020667323 U CN 201020667323U CN 201877825 U CN201877825 U CN 201877825U
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Abstract
The utility model relates to a multi-tower high-voltage direct-current filter capacitor device. Three to five capacitor towers are adopted, each tower comprises 15 to 50 layers of table frames, each layer comprises 4 to 32 capacitor units, the top table frame of each tower is provided with high-voltage bus bars which are mutually connected for forming an integral structure, primary connecting wires of capacitor units of each tower are H-shaped connecting wires or II-shaped connecting wires, 4 to 32 capacitor units are arranged in each layer of each tower, and the capacitor units of each layer are connected in series into 2 to 8 strings. Voltage equalizing rings are arranged on each layer or every 1 to 3 layers of the high-voltage table frames of each tower. The utility model has the preferable scheme that three capacitor towers are adopted, and each layer of each tower is provided with 8 capacitor units which are connected in series into 4 strings of H-shaped connecting wires, wherein two towers are connected into double-differential-current-bridge unbalance current protection circuits. The capacitor device in a multi-tower structure is in a mutually supported whole body, and the stability and the anti-shock performance are improved. Each tower forms the bridge differential or transverse differential unbalanced circuit protection, and the operation reliability is improved.
Description
(1) technical field
The utility model relates to the high voltage dc transmission technology field, is specifically related to a kind of multitower high voltage direct current filter capacitor device that super high voltage direct current electricity transmission and extra-high voltage direct-current transmission are used that is used for.
(2) background technology
In electric power system, particularly in the ultra-high/extra-high voltage DC transmission system,, need to use a large amount of DC filter capacitors devices for the AC harmonic component of filtering appts DC side.After a plurality of capacitors connect through certain connection in series-parallel, directly receive ± 500kV even ± dc bus of 1000kV on.These capacitor devices all need to adopt graded insulation, must separate with insulator between just per two layer capacitors and between capacitor and the ground.Because capacitor has the characteristics of " stopping direct current, the logical interchange ", so in the capacitor group, direct voltage is by distribution of resistance.This creepage ratio that just requires insulator in the dc fields is apart from bigger.Test shows that the creepage of dc fields insulator requires to reach at least more than the 54mm/kV than distance, and product requirement reaches more than the 66mm/kV now.Therefore ± and the height of 800kV stent-type multi-layer capacitor pylon reaches about 30m, and whole pylon weight reaches 50 to 70 tons.This brings great difficulty for the antidetonation of capacitor tower.Post insulator has been difficult to realize so high shockproof requirements at present.If with associated components overstrikings such as insulators, can reach the requirement of antidetonation reluctantly, but still have safety problem: the one, for so important equipment, margin of safety is too little, and security reliability is not high; The 2nd, the filthy resistance of insulator overstriking rear surface reduces, and the voltage that directly influences the capacitor group distributes, and is unfavorable for the safe operation of capacitor.
At present, the primary structure mode of homemade DC filter capacitors has: 1) single tower rack-like structures.Exactly capacitor is installed on the shelf, directly receives on the ultra-high/extra-high voltage dc bus through the multi-layer classification insulation.The advantage of this frame mode is to be simple and easy to implement, and technology is also very ripe, is the leading frame mode of present DC filter capacitors device.Shortcoming be suitable for voltage can only be at ± 660kV and following, and single pool-size can not be too big; 2) single tower suspension type structure.Exactly capacitor is installed on the shelf of a suspention, directly receives on the ultra-high/extra-high voltage dc bus through the multi-layer classification insulation.The advantage of this frame mode is to have avoided anti-seismic problem, and technology is also very ripe.Shortcoming is the maintenance difficulty, and single pool-size can not be done too greatly.
The patent No. is the utility model patent " high-voltage direct-current polar PLC capacitor " of ZL 2,009 2 0164713.6, the capacitor column that becomes with 7 layers～30 layer capacitor unit vertical pile of same height and the insulator post of 7 layers～30 layers of post insulator vertical pile, constitute the overall structure pylon of three post disjunctors, improved the stability of HVDC (High Voltage Direct Current) transmission system capacitor device greatly, requirement of mechanical strength to post insulator reduces, and has solved anti-seismic problem.This scheme because of its capacitor column this as the porcelain bushing type structure, weight is also lighter, anti-seismic problem so outstanding, but does not consider unsymmetrical current protection problem.
(3) utility model content
The purpose of this utility model is a kind of multitower high voltage direct current filter capacitor device of design; interconnect by 3～5 capacitor towers; constitute the multitower supporting structure; and on every layer of stand of each capacitor tower many capacitors are arranged; the capacitor connection in series-parallel of each tower constitutes " H " type wiring or the wiring of II type; whole force structure is stable, and the wiring of each capacitor tower forms independently bridge difference unsymmetrical current protection or horizontal poor unsymmetrical current protection, the reliability of raising device internal fault protection.
The multitower high voltage direct current filter capacitor device of the utility model design, each capacitor tower comprises capacitor unit, stand and post insulator, 15 layers～50 layers stand of pedestal column insulator support have many capacitor units on every layer of stand; This capacitive means includes 3～5 capacitor towers, and the top stand of each tower interconnects through member, and 3～5 capacitor towers are connected to become an overall structure.
Capacitor unit primary connection on each capacitor tower is " H " type wiring or is the wiring of II type.
It is the electric bridge that four electric capacity arms are formed that the wiring of described " H " type is that each capacitor unit connects, and is connected with current transformer near the intermediate potential of each electric bridge, forms bridge difference unsymmetrical current protective circuit; It is 2 electric capacity arms, low pressure termination current transformer that the wiring of described II type is that each capacitor unit connects, and 2 arms compose in parallel horizontal poor unsymmetrical current protective circuit.
In this programme, 4～32 capacitor units are arranged on every layer of stand of every tower, every layer capacitor unit series connection is 2 strings～8 strings, at the 7th layer～the 35th layer current transformer that connects of drawing unsymmetrical current of each pylon.
The top stand of each tower connects through the high-voltage tube parent phase.
The upper stage rack-layer of every tower voltage more than 252kV, every layer or every 1～3 layer installing grading ring.
Preferred version is that 3 capacitor towers constitute three tower prismatic supports.Every tower has 8 capacitor units for every layer, and every layer capacitor unit series connection is 4 strings, and the capacitor unit primary connection of every tower is the wiring of " H " type.
One of them filter branch is made up of 2 capacitor towers, and the capacitor unit of 2 capacitor towers connects and is doube bridge difference unsymmetrical current protective circuit in parallel, and promptly the capacitor unit of three capacitor towers is formed 2 filter branch.
The advantage of the utility model multitower high voltage direct current filter capacitor device is:
1, multi-tower structure utilizes triangle force structure stability principle, adopts strengthening measure to link together at the top a plurality of towers, makes original separate tower form the integral body of mutual support, has alleviated the stress load of single tower simultaneously; On the other hand, the whole slenderness ratio of multitower is improved widely, and center of gravity is more stable, and anti-seismic performance improves greatly;
2, every tower constitutes protection of bridge difference unsymmetrical current or horizontal poor unsymmetrical current protection alone, and the quantity of comparing protected location with single tower structure has increased, and the protection reliability of capacitor device also is improved;
3, the serial number of every layer capacitor unit increases, and the inner member serial number of single capacitor unit reduces, number in parallel increases, and the reliability of fuse action in increasing improves the operational reliability of capacitor device;
4, increase the serial number of every layer capacitor unit, reduced the rated voltage of single capacitor unit, reduced the active loss of inside, single capacitor unit, the operation temperature rise of capacitor unit reduces, and also improves the operational reliability of capacitor device;
5, the high-voltage tube mother of connection top layer stand helps reducing the surface field intensity of electrified body, reduces the generation of corona.
(4) description of drawings
Fig. 1 is the structural representation of this multitower high voltage direct current filter capacitor device embodiment 1;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 is the right view of Fig. 1
Fig. 4 is schematic diagram of " H " type wiring among the embodiment 1;
Fig. 5 is the schematic diagram of II type wiring in this enforcement 2;
Fig. 6 is the three tower capacitor filtering branch road schematic diagrames of embodiment 1.
The figure internal label is:
1, high-voltage tube mother, 2 capacitor units, 3, the bar type post insulator, 4, grading ring, 5, tie, 6, stand, 7, current transformer, 8, the pedestal column insulator, 9, the high pressure exit, 10, the low pressure exit.
(5) embodiment
This multitower high voltage direct current filter capacitor device embodiment 1 as shown in Figures 1 to 3,3 capacitor towers constitute three tower prismatic supports.Each capacitor tower comprises capacitor unit 2, stand 6 and post insulator, and 30 layers of stand 6 of pedestal column insulator 8 supportings have bar type post insulator 3 between each layer stand, and it is 4 strings that 8 capacitor units 2, series connection are arranged on having on every layer of stand 6; The top stand 6 of each tower interconnects through high- voltage tube mother 1, and 3 capacitor towers are connected to become an overall structure.
Capacitor unit 2 on the multilayer stand on each capacitor tower is the wiring of " H " type through tie 5 primary connections.Schematic diagram of " H " type wiring as shown in Figure 4,60 capacitor units 2 of 15 layers of series connection are a brachium pontis, 4 brachium pontis are connected to electric bridge, the 15th layer of every tower, be that draw unsymmetrical current and connects current transformer 7 at the intermediate potential place of electric bridge, this example adopts the optical fiber type current transformer, also can be with pure photoelectric type current transformer, or hybrid-type current transformer, or electronic current mutual inductor or the like.
As shown in Figure 6, the electric bridge parallel connection that the capacitor of 2 capacitor towers of this example constitutes is a doube bridge difference unsymmetrical current protective circuit, and promptly the capacitor unit of three capacitor towers is formed 2 filter branch.S represents the number of series capacitors unit among the figure, and P represents the number of capacitor unit in parallel; TA represents current transformer; LV represents the low pressure exit, and HV represents the high pressure exit.
Every tower more than the 10th layer voltage be higher than 252kV, every 1～3 layer installing grading ring 4.The the the the the the 10th, the 13rd, the 16th, the 19th, the 21st, the 23rd, the 25th～30th layer of stand of this example all installed grading ring 4.
Header-terminal capacitance device unit 2 at each capacitor tower connects high pressure exit 9, and the capacitor unit 2 of bottom connects low pressure exit 10.
Embodiment 2
This multitower high voltage direct current filter capacitor device embodiment 2 also has 3 capacitor towers, and the capacitor unit 2 on each capacitor tower is the wiring of II type through tie 5 primary connections.The primary connection schematic diagram as shown in Figure 5,120 capacitor units 2 of 30 layers of series connection connect electromagnetic current transducer at low-pressure end (bottom of capacitor tower) becomes an arm, 2 arm parallel connections become horizontal poor unsymmetrical current protective circuit.Other structure is all identical with embodiment 1.
This multitower high voltage direct current filter capacitor device embodiment 3 also has 3 capacitor towers, and wherein the capacitor unit 2 on two capacitor towers is the wiring of " H " type through tie 5 primary connections.Capacitor unit 2 primary connections on another capacitor tower are the wiring of II type.Other structure is all identical with embodiment 1.
The foregoing description is the specific case that the purpose of this utility model, technical scheme and beneficial effect are further described only, and the utility model is not to be defined in this.All any modifications of within scope of disclosure of the present utility model, being made, be equal to replacement, improvement etc., all be included within the protection range of the present utility model.
Claims (10)
1. multitower high voltage direct current filter capacitor device, each capacitor tower comprises capacitor unit (2), stand (6) and post insulator, pedestal column insulator (8) supporting 15 layers～50 layers stand (6) have many capacitor units (2) on having on every layer of stand (6); It is characterized in that:
Include 3～5 capacitor towers, the top stand of each tower interconnects through member, and 3～5 capacitor towers are connected to become an overall structure;
Capacitor unit (2) primary connection on each capacitor tower is " H " type wiring or is the wiring of II type.
2. multitower high voltage direct current filter capacitor device according to claim 1 is characterized in that:
4～32 capacitor units 2 are arranged on every layer of stand (6) of every tower, and every layer capacitor unit (2) series connection is 2 strings～8 strings.
3. multitower high voltage direct current filter capacitor device according to claim 1 is characterized in that:
Capacitor unit (2) primary connection on the described capacitor tower is the wiring of " H " type, draws unsymmetrical current for the 7th layer～the 35th layer at each pylon and connects current transformer (7).
4. multitower high voltage direct current filter capacitor device according to claim 3 is characterized in that:
Described current transformer (7) is optical fiber type current transformer or photoelectric type current transformer or hybrid optoelectronic current transformer or electronic current mutual inductor.
5. multitower high voltage direct current filter capacitor device according to claim 1 is characterized in that:
Capacitor unit (2) primary connection on the described capacitor tower is the wiring of II type, draws unsymmetrical current at each pylon bottom and connects current transformer (7).
6. multitower high voltage direct current filter capacitor device according to claim 5 is characterized in that:
Described current transformer (7) is an electromagnetic current transducer.
7. multitower high voltage direct current filter capacitor device according to claim 1 is characterized in that:
The top stand of each tower interconnects through high-voltage tube mother (1).
8. multitower high voltage direct current filter capacitor device according to claim 1 is characterized in that:
The upper stage rack-layer of every tower voltage more than 252kV, every layer or every 1～3 layer installing grading ring (4).
9. multitower high voltage direct current filter capacitor device according to claim 1 is characterized in that:
3 capacitor towers constitute three tower prismatic supports; Every tower has 8 capacitor units (2) for every layer, and every layer capacitor unit (2) series connection is 4 strings.
10. multitower high voltage direct current filter capacitor device according to claim 9 is characterized in that:
Wherein the capacitor unit of 2 capacitor towers (2) connects and is doube bridge difference unsymmetrical current protective circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206673233U CN201877825U (en) | 2010-12-18 | 2010-12-18 | Multi-tower high-voltage direct-current filter capacitor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206673233U CN201877825U (en) | 2010-12-18 | 2010-12-18 | Multi-tower high-voltage direct-current filter capacitor device |
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| Publication Number | Publication Date |
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| CN201877825U true CN201877825U (en) | 2011-06-22 |
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| CN2010206673233U Expired - Lifetime CN201877825U (en) | 2010-12-18 | 2010-12-18 | Multi-tower high-voltage direct-current filter capacitor device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610389A (en) * | 2011-12-20 | 2012-07-25 | 日新电机（无锡）有限公司 | Integrated capacitor bank with insulation support |
| WO2015070891A1 (en) * | 2013-11-12 | 2015-05-21 | Abb Technology Ltd | A high voltage capacitor bank, a hvdc capacitor filter arrangement and an electric power transmission installation |
| CN105977017A (en) * | 2016-06-28 | 2016-09-28 | 桂林电力电容器有限责任公司 | Latticed anti-seismic power capacitor frame, fixing rack, tower and device |
| CN106024376A (en) * | 2016-07-06 | 2016-10-12 | 桂林电力电容器有限责任公司 | Layered anti-shock electric power capacitor device |
| CN107068394A (en) * | 2017-05-27 | 2017-08-18 | 桂林电力电容器有限责任公司 | A kind of capacitor device |
-
2010
- 2010-12-18 CN CN2010206673233U patent/CN201877825U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610389A (en) * | 2011-12-20 | 2012-07-25 | 日新电机（无锡）有限公司 | Integrated capacitor bank with insulation support |
| WO2015070891A1 (en) * | 2013-11-12 | 2015-05-21 | Abb Technology Ltd | A high voltage capacitor bank, a hvdc capacitor filter arrangement and an electric power transmission installation |
| CN105977017A (en) * | 2016-06-28 | 2016-09-28 | 桂林电力电容器有限责任公司 | Latticed anti-seismic power capacitor frame, fixing rack, tower and device |
| CN106024376A (en) * | 2016-07-06 | 2016-10-12 | 桂林电力电容器有限责任公司 | Layered anti-shock electric power capacitor device |
| CN106024376B (en) * | 2016-07-06 | 2018-08-31 | 桂林电力电容器有限责任公司 | A kind of hierarchical antidetonation power capacitor apparatus |
| CN107068394A (en) * | 2017-05-27 | 2017-08-18 | 桂林电力电容器有限责任公司 | A kind of capacitor device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110622 |
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| CX01 | Expiry of patent term |