CN104009459B - A kind of residual charge bleeder of converter station valve hall - Google Patents
A kind of residual charge bleeder of converter station valve hall Download PDFInfo
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Abstract
The present invention relates to the residual charge bleeder of a kind of converter station valve hall, it is included in single converter station valve hall, one ground cutter of each configuration on valve Room high pressure polar curve point place bus and low pressure polar curve point place, valve Room bus, it is characterized in that: on the connection bus between A phase converter transformer valve-side terminal and the C phase converter transformer valve-side terminal of Y Δ converter power transformer group, configure a ground cutter, Y Y converter power transformer group neutral terminal place bus configures one cutter.The present invention is four by the valve Room of prior art, eight ground cuttves are simplified, and saves total investment of engineering.The ground cutter that Y Y converter power transformer group and Y Δ converter power transformer group are respectively configured all uses side wall formula, while meeting its required electrical distance and structural requirement, when avoiding Maintenance and Repair in the valve Room there is security incident in operations staff, optimizes valve Room electrical arrangement.The present invention can be widely applied to high-voltage dc transmission electrical domain.
Description
Technical field
The present invention relates to a kind of residual charge bleeder, especially with regard to a kind of conventional (DC voltage level is ±
500kV and following) and the Converter Station Valve of extra-high voltage (DC voltage level is ± 800kV and more than) DC transmission engineering
The residual charge bleeder in the Room.
Background technology
Ground cutter is as the bleeder of the charging equipment residual charge including the converter power transformer of the valve Room, in power system
In extensively use, be to ensure that operations staff's visual plant of personal safety when equipment repair and maintenance.
As shown in Figure 1 and Figure 2, generally comprise in the conventional and single valve Room of extra-high voltage direct-current transmission engineering current conversion station by
The Y-Δ converter power transformer group of three single-phase double winding converter power transformers composition and by three single-phase double winding change of current transformations
The Y-Y converter power transformer group of device composition.In Y-Δ converter power transformer group, T1 is the A of Y-Δ converter power transformer group
Phase converter power transformer, T11 is the A phase converter transformer valve-side the first terminal of Y-Δ converter power transformer group, and T12 is Y-
A phase converter transformer valve-side second terminal of Δ converter power transformer group；T2 is the B phase change of current of Y-Δ converter power transformer group
Transformator, T21 is the B phase converter transformer valve-side the first terminal of Y-Δ converter power transformer group, and T22 is the Y-Δ change of current
B phase converter transformer valve-side second terminal of transformer group；T3 is the C phase converter power transformer of Y-Δ converter power transformer group,
T31 is the C phase converter transformer valve-side the first terminal of Y-Δ converter power transformer group, and T32 is Y-Δ converter power transformer group
C phase converter transformer valve-side the second terminal.In Y-Y converter power transformer group, T4 is Y-Y converter power transformer group
A phase converter power transformer, T41 is the A phase converter transformer valve-side terminal of Y-Y converter power transformer group, and T42 is that Y-Y changes
The A phase converter power transformer neutral terminal of convertor transformer group；T5 is the B phase converter power transformer of Y-Y converter power transformer group,
T51 is the B phase converter transformer valve-side terminal of Y-Y converter power transformer group, and T52 is the B of Y-Y converter power transformer group
Phase converter power transformer neutral terminal；T6 is the C phase converter power transformer of Y-Y converter power transformer group, and T61 is that Y-Y changes
The C phase converter transformer valve-side terminal of convertor transformer group, T62 is the C phase converter power transformer of Y-Y converter power transformer group
Neutral terminal.
In the single valve Room of routine and extra-high voltage direct-current transmission engineering current conversion station, typically configure eight ground cuttves, with bleeder valve
The residual charge of Room converter power transformer: they are low pressure polar curve point ground, valve Room cutter GS1 respectively, valve Room high pressure polar curve point ground
The B of A phase converter transformer valve-side ground cutter GS21, the Y-Δ converter power transformer group of cutter GS4, Y-Δ converter power transformer group
C phase converter transformer valve-side ground the cutter GS23, Y-Y of phase converter transformer valve-side ground cutter GS22, Y-Δ converter power transformer group
The B phase converter power transformer of A phase converter transformer valve-side ground cutter GS31, the Y-Y converter power transformer group of converter power transformer group
The C phase converter transformer valve-side ground cutter GS33 of valve side ground cutter GS32 and Y-Y converter power transformer group.Wherein, GS1 beats
On low pressure polar curve point LB (Low voltage Bus) the place bus of the valve Room, it uses side wall formula；GS4 beats high in the valve Room
On pressure polar curve point HB (High voltage Bus) place bus, it uses site type；GS21 beats female at T11 place
On line；GS22 beats on the bus of T21 place；GS23 beats on the bus of T31 place；GS31 beats female at T41 place
On line；GS32 beats on the bus of T51 place；GS33 beats on the bus of T61 place, and GS21, GS22, GS23,
GS31, GS32, GS33 all can use side wall formula or buried.
1) the release residual charge mode of respective terminal of the Y-Δ converter power transformer group of prior art is as follows:
A) T11, T21, T31 directly release each via GS21, GS22, GS23 of configuration corresponding on the bus of place
Respective residual charge；
B) T12 with T21 is connected, and for same potential point, therefore T12 is released residual charge by GS22；T22 and T31
Connecting, for same potential point, therefore T22 is released residual charge by GS23；T32 with T11 is connected, for same current potential
Point, therefore T32 is released residual charge by GS21.
2) the release residual charge mode of respective terminal of the Y-Y converter power transformer group of prior art is as follows:
A) T41, T51, T61 directly release each via GS31, GS32, GS33 of configuration corresponding on the bus of place
Respective residual charge；
B) residual charge of T42 is transferred to T41 by the inductance element between T41, then is released by GS31；T52
Residual charge be transferred to T51 by the inductance element between T51, then released by GS32；The remaining electricity of T62
Lotus is transferred to T61 by the inductance element between T61, then is released by GS33.
Due to valve Room converter power transformer group (Y-Y converter power transformer group and Y-Δ converter power transformer group) valve side region terminal
Wiring is complicated, and combination the air gap is more, especially for extra-high voltage direct-current transmission engineering, electric pressure and insulation water
Flat height, air clearance requires harsh, as cutter configuration too much, be both unfavorable for valve Room technique electrical arrangement, be also unfavorable for
Control engineering equipment cost.
As it is shown on figure 3, for the extra-high voltage direct-current transmission engineering height end valve Room, according to existing ground cutter equipping rules, be subject to
Air clearance requires and the structure of ground cutter itself limits, Y-Y converter power transformer group and the ground cutter of Y-Δ converter power transformer group
Can only use into buried, i.e. need in the valve Room, arrange genuine hole, easily cause operation when the valve Room carries out Maintenance and Repair
The security incident of personnel.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide one and ensure that operation maintenance safety, saving engineering are always thrown
Money optimizes the residual charge bleeder of the converter station valve hall that the valve Room is arranged simultaneously.
For achieving the above object, the present invention takes techniques below scheme: the residual charge of a kind of converter station valve hall is released dress
Putting, it is included in single converter station valve hall, and valve Room high pressure polar curve point place bus and low pressure polar curve point place, the valve Room are female
One ground cutter of each configuration on line, it is characterised in that: at the A phase converter transformer valve-side terminal of Y-Δ converter power transformer group
With on the connection bus between C phase converter transformer valve-side terminal configure one ground cutter, Y-Y converter power transformer group neutrality
A ground cutter is configured on the bus of some terminal place.
Described converter station valve hall uses the converter station valve hall of customary DC power transmission engineering.
Described converter station valve hall uses the converter station valve hall of extra-high voltage direct-current transmission engineering.
When described converter station valve hall uses the converter station valve hall of extra-high voltage direct-current transmission engineering, described Y-Y converter power transformer
In group and described Y-Δ converter power transformer group, the ground cutter of configuration all uses side wall formula.
Due to the fact that and take above technical scheme, it has the advantage that 1, the present invention is directed to conventional and extra-high straightening
The current conversion station single valve Room of stream power transmission engineering, high pressure polar curve point place, valve Room bus, low pressure polar curve point place, valve Room mother
Line, Y-Δ converter power transformer group A phase and C phase converter transformer valve-side terminal between connection bus, the Y-Y change of current becomes
One ground cutter of each configuration on the bus of depressor group neutral terminal place.The present invention by ground cutter quantity from the prior art eight
It is four simplifying, saves total investment of engineering.2, for the extra-high voltage direct-current transmission engineering height end valve Room, due to Y-Y
The dielectric level of converter power transformer group neutral terminal place bus is much smaller than Y-Y converter power transformer group valve side terminal place
The dielectric level of bus, therefore uses the ground cutter of the present invention only need to use side wall formula, can meet its required electric away from
From and structural requirement, it is to avoid in using buried ground cutter to cause the valve Room, during Maintenance and Repair there is safe thing in operations staff
Therefore.3, relative to A phase and the B phase of Y-Δ converter power transformer group or B phase and C phase converter transformer valve-side terminal it
Between connection bus for, the present invention uses A phase and the C phase converter transformer valve-side terminal of Y-Δ converter power transformer group
Between connect bus more conducively cutter use side wall formula layout pattern, solve Y-Δ converter power transformer group three alternate
Wiring is complicated, is restricted relatively big, that cutter configuration in ground is inconvenient problem by electrical distance, extremely has valve Room electrical arrangement
Profit.Therefore, the present invention can be widely applied to high-voltage dc transmission electrical domain.
Accompanying drawing explanation
Fig. 1 is ground, existing HVDC Converter Stations valve Room cutter configuration electrical wiring schematic diagram
Fig. 2 is ground, existing HVDC Converter Stations valve Room cutter configuration electrical arrangement plane graph
Fig. 3 is the A-A sectional schematic diagram in Fig. 2
Fig. 4 is ground, the HVDC Converter Stations valve Room cutter configuration electrical wiring schematic diagram of the present invention
Fig. 5 is ground, the HVDC Converter Stations valve Room cutter configuration electrical arrangement plane graph of the present invention
Fig. 6 is the A-A sectional schematic diagram in Fig. 5
Detailed description of the invention
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings.
The present invention (as shown in figures 4-6) and prior art (as shown in Figures 1 to 3) it is identical in that: in the valve Room
Configuring valve Room low pressure polar curve point ground cutter GS1 on the bus of low pressure polar curve point LB place, it uses side wall formula.In the valve Room
Configuring valve Room high pressure polar curve point ground cutter GS4 on the bus of high pressure polar curve point HB place, it uses site type.
Difference with the prior art of the present invention includes 2 points:
1) at A phase converter transformer valve-side terminal and the C phase converter transformer valve-side terminal of Y-Δ converter power transformer group
Between connection bus on configure a ground cutter, the bus i.e. connected between T11 and T32 configures Y-Δ change of current change
Depressor group valve side common land cutter GS2
The release residual charge mode of respective terminal of the Y-Δ converter power transformer group of the present invention is as follows:
A) T11 and T32 is same potential point, is directly released respective residual charge by GS2；
B) T12 and T21 is same potential point, and the residual charge of the two is passed by the inductance element between T11 and T12
It is handed to T11, then is released by GS2；T22 and T31 is same potential point, the residual charge of the two by T31 with
Inductance element between T32 is transferred to T32, then is released by GS2.
In prior art, T11, T21, T31 can by GS21, GS22, GS23 of configuration corresponding on respective bus
With respective residual charge of releasing rapidly, and T12 Yu T21 be same potential point, T22 Yu T31 be same current potential
Point, T32 Yu T11 are same potential point, therefore T12, T21, GS22 that T22, T32 are connected by respective correspondence,
T31, GS23, T11, GS21 can also release rapidly respective residual charge.In the present invention, T11's with T32 is residual
Remaining electric charge is directly released by both GS2 of configuration on bus that connects, T12 with T21, T22 with T31 are the most respective
Released residual charge by corresponding inductance element.The present invention is affected by inductance element, when residual charge is totally released
Between slightly slow for hinge structure, but still meet wanting of residual charge of fully releasing before operations staff's Maintenance and Repair
Asking, while guaranteeing operations staff's Maintenance and Repair safety, one ground cutter of employing i.e. instead of three of prior art
Ground cutter, reduces engineering equipment investment.Meanwhile, relative to A phase and the B phase of Y-Δ converter power transformer group or B phase with
For connection bus between C phase converter transformer valve-side terminal, the A phase of Y-Δ converter power transformer group and the C phase change of current
Bus more conducively the cutter that connects between transformator valve side terminal uses the pattern of side wall formula layout, solves the Y-Δ change of current
Between transformer group three-phase, wiring is complicated, is restricted relatively big, that cutter configuration in ground is inconvenient problem by electrical distance, to the valve Room
Electrical arrangement is extremely advantageous.
2) one ground cutter of each configuration on the bus of Y-Y converter power transformer group neutral terminal place, i.e. at T42, T52
With one Y-Y converter power transformer group neutral point common land cutter GS3 of configuration on the bus of T62 place
The release residual charge mode of respective terminal of the Y-Y converter power transformer group of the present invention is as follows:
A) residual charge of T41 is transferred to T42 by the inductance element between T42, then is released by GS3；T51
Residual charge be transferred to T52 by the inductance element between T52, then released by GS3；The residual charge of T61
It is transferred to T62 by the inductance element between T62, then is released by GS3；
B) T42, T52, T62 are same potential point, respective residual charge of all directly being released by GS3.
In prior art, although T41, T51, T61 can be by GS31, GS32, GS33 of configuration on corresponding bus
Release rapidly residual charge, but the approach of releasing of T42, T52, T62 residual charge needs through corresponding inductance unit
Part, speed of therefore releasing is slower.In the present invention, although the approach of releasing of T41, T51, T61 residual charge need through
Crossing corresponding inductance element, speed of releasing is relatively slow, but T42, T52, T62 can join by bus that three shares
The GS3 put releases rapidly respective residual charge.Therefore, for hinge structure of the present invention, Y-Y change of current transformation
The residual charge of device group time of totally releasing is roughly the same, and T42, T52, T62 are same potential point, it is only necessary to one
Ground cutter can be met the function of respective residual charge of releasing, save again two ground cuttves.
When the present invention is applied to the extra-high voltage direct-current transmission engineering height end valve Room, due to T42, T52, T62 place bus
Dielectric level is much smaller than the dielectric level of T41, T51, T61 place bus, and therefore GS3 only need to use side wall formula, i.e.
Its required electrical distance and structural requirement can be met, it is to avoid when using buried ground cutter to cause Maintenance and Repair in the valve Room
There is security incident in operations staff.
Above-mentioned each example is merely to illustrate the present invention, wherein the phase sequence of converter power transformer, equipment and terminal name and connection
Modes etc. all can be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement,
The most should not get rid of outside protection scope of the present invention.
Claims (1)
1. a residual charge bleeder for converter station valve hall, it is included in single converter station valve hall, valve Room high pressure
One ground cutter of each configuration on polar curve point place bus and low pressure polar curve point place, valve Room bus, it is characterised in that: at Y-Δ
On connection bus between the A phase converter transformer valve-side terminal of converter power transformer group with C phase converter transformer valve-side terminal
Configure a ground cutter, Y-Y converter power transformer group neutral terminal place bus configures a ground cutter；
Described converter station valve hall uses the converter station valve hall of customary DC power transmission engineering；Or described converter station valve hall uses spy
The converter station valve hall of high voltage direct current transmission project, when described converter station valve hall uses the change of current of extra-high voltage direct-current transmission engineering
Stand the valve Room time, in described Y-Y converter power transformer group and described Y-Δ converter power transformer group configuration ground cutter all use side wall
Formula.
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| CN201410195346.1A CN104009459B (en) | 2014-05-09 | 2014-05-09 | A kind of residual charge bleeder of converter station valve hall |
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| CN201410195346.1A CN104009459B (en) | 2014-05-09 | 2014-05-09 | A kind of residual charge bleeder of converter station valve hall |
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| CN203932998U (en) * | 2014-05-09 | 2014-11-05 | 国家电网公司 | The residual charge bleeder in the Converter Station Valve Room |
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| CN100471022C (en) * | 2006-03-22 | 2009-03-18 | 国家电网公司 | Method for DC transmission engineering intra-valve hall converter transformer wiring method |
| CN101295000B (en) * | 2008-06-26 | 2011-02-09 | 中国电力科学研究院 | Distant-range high voltage direct current transmission transient overload testing method |
| CN202068184U (en) * | 2010-12-09 | 2011-12-07 | 国家电网公司 | Cascade converter station and cascade multi-terminal HVDC system |
| CN103187722B (en) * | 2013-04-09 | 2015-12-09 | 国家电网公司 | For flexible direct current power transmission system DC side overvoltage protection and guard method |
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