CN102957104A - Improved method of transformer and GIS (gas insulated switchgear) power distribution device flexible connection structure - Google Patents
Improved method of transformer and GIS (gas insulated switchgear) power distribution device flexible connection structure Download PDFInfo
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- CN102957104A CN102957104A CN2011102363398A CN201110236339A CN102957104A CN 102957104 A CN102957104 A CN 102957104A CN 2011102363398 A CN2011102363398 A CN 2011102363398A CN 201110236339 A CN201110236339 A CN 201110236339A CN 102957104 A CN102957104 A CN 102957104A
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Abstract
The invention discloses an improved method of a transformer and GIS (gas insulated switchgear) power distribution device flexible connection structure. The improved method includes the steps: A, recovering gas; B, demounting a GIS bus drum and a support thereof; C, demounting an oil-gas sleeve and connecting equipment thereof; D, demounting an arrester base support; E, mounting a transformer air sleeve; F, mounting the an arrester base support and a GIS sleeve supporting seat; and G, mounting a tubular bus. The improved method is low in implementation difficulty, safe and reliable in operation, short in construction period and low in economic loss, and a transformer is kept in integral operation.
Description
Technical field:
The present invention relates to a kind of construction method of power transformation engineering, say that more specifically GIS substation transformer and GIS transform the remodeling method of the female connected mode of pipe as by oil-gas casing direct connection arrangement.Belong to the T ﹠ D Technology field.
Background technology:
GIS transformer station because of near build the projects such as subway, CBD center and east station, underground water is extracted out in a large number, thereby causes transformer substation foundation generation sedimentation.Because what used at this station is that GIS is connected by oil-gas casing direct connection arrangement with transformer, because of ground load difference separately, the amplitude of sedimentation is also inconsistent, thereby cause GIS and transformer high-voltage and middle straightening to connect interface and will bear very large destructive power, for the security of operation of transformer station, transformer and GIS transform the connected mode of pipe bus as by oil-gas casing direct connection arrangement.Domestic power transmission and transformation Lixing industry for GIS substation transformer and GIS by installation and the reforming technology flow process that oil-gas casing direct connection arrangement transform flexible conductor as was originally: 1, gas recovery, remove oil-gas casing and transformer to GIS bus pipe bus bar canister, remove the bus bar canister basis; 2, portal frame foundation construction; 3, portal frame is installed; 4, casing air is installed; 5, the installation of flexible conductor and wire support equipment.
Above technological process, in carrying out transformer oil gas bushing connection transformation operation, exist larger restricted, set up portal frame, must first transformer could be rebuild the portal frame basis to GIS bus bar canister and basis dismounting thereof, again set up portal frame, the installation, flexible conductor of carrying out at last flexible conductor and GIS's docks and the adjustment of wire support equipment again, and the engineering time is generally longer.Aforementioned construction process because will reconstructing the portal frame basis, and sets up portal frame, so that transformer station's interruption duration is longer, has also increased difficulty of construction simultaneously, causes network system to be in for a long time the abnormal running mode, the serious threat power grid security.Not only self construction cost is larger, because of the long-term electricity sales amount decline that has a power failure and cause, has objectively had influence on Zhengzhou City's energy scheduling simultaneously.And also there is following shortcoming in above technique: it is large 1) to implement difficulty: transform regional narrow field, arrange that the portal frame base position is limited.As arrange portal frame, the dynamic and static load of portal frame is checked very trouble, the version complicated foundation will occur, because the basis is more near the old use in basis, is unfavorable for very much construction.And will destroy ground on every side during new foundation construction, in ensuing transformation, Construction traffic can't erect-position, for follow-up work brings new problem.2) long construction period: take the 220kV power distribution equipment as example, as adopt the portal frame reconstruction flow, after the transformer oil feed channel complete removal, could transform and the civil engineering maintenance, again set up that portal frame, flexible conductor are installed and the construction accumulative total such as wire support equipment adjustment needs 42 days approximately the original equipment foundation of civil work, long construction period, cost is higher.3) have a strong impact on the network system normal mode: because shore 1# main transformer is stopped transport, add again and be in the high load capacity power supply period of meeting the kurtosis summer, shore 1# becomes institute's on-load and all bears to shore 2# main transformer and osiery 1# main transformer, 2# main transformer, cause network system to be in for a long time the abnormal running mode, eastern region, serious threat Zhengzhou power grid security.4) economic loss is large: under the impact of present financial crisis, city's electricity sales amount on year-on-year basis last year be negative growth, in the critical period of meeting the kurtosis summer, the power supply safety of eastern region, Zhengzhou City is extremely important.And if be in a main transformer stoppage in transit owing to the elongated phase of river, shore this moment, cause the Zhengzhou electrical network to be in for a long time under the abnormal running mode, then certainly will greatly affect the power supply safety of Zhengzhou City, not only be difficult to finish the sale of electricity index that State Grid Corporation of China assigns, and Zheng Dong newly developed area normal development is hidden some dangers for.
Summary of the invention:
The objective of the invention is provides a kind of transformer and GIS power distribution equipment flexible connection structure and remodeling method in order to overcome defective and the deficiency that above-mentioned prior art difficulty of construction is large, the cycle is long, cost is high, economic loss is large.
For achieving the above object, technical scheme of the present invention is: GIS substation transformer and GIS transform the female remodeling method of pipe as by oil-gas casing direct connection arrangement, may further comprise the steps:
A: gas reclaims: the air chamber of needs transformation is carried out SF6 gas reclaim, vacuumize, pressure release processes.
B: remove GIS bus bar canister and support thereof: the former bus bar canister of dividedly dismantling is also cut apart lifting, removes former bus bar canister support, keeps all original framework bases.
C: remove oil-gas casing and connection device thereof: reclaim transformer oil, remove the conductor that oil-gas casing links to each other with transformer, remove oil-gas casing.
D: remove lightning arrester base and support: select reliably the firmly strong point, add jack equipment is propped up, remove former lightning arrester base and support.
E: the transformer casing air is installed: relatively low, alternate, the relative heavy electric machinery according to power transformer sleeve pipe live part is installed casing air rising seat and transformer casing air to the minimum air void of low pressure winding terminal.
F: lightning arrester base support and GIS collar supports seat are installed: the step that the lightning arrester base support is installed is opposite with the step of removing the old base support of lightning arrester, and at lightning arrester base bracket basis assembling GIS collar supports seat.
G: pipe is female to be installed: the connection of hard tube mother, flexible conductor and wire and GIS equipment.
Use correct SF6 protective articles to open hand hole cover among the described step B, remove the GIS conductor, confirm institute's influential decomposition bus bar canister conductor tab is all removed, the former bus bar canister of dividedly dismantling is also cut apart lifting, remove former bus bar canister support, keep all original framework bases.Dividedly dismantling is removed former bus bar canister and is cut apart lifting, removes former oil-gas casing, removes former bus bar canister support, keeps all original framework bases.
Carry out among the described step C at first should reclaiming transformer oil before the bushing shell for transformer transformation, oil level is lower than the seat that raises and exposes the transformer overhead guard, removes the conductor that links to each other with transformer in the Oil/Gas Pipe, removes oil-gas casing again.The transformer oil tracheae connects the 110kV side and is connected to the four-way connection, should lift by crane first this four-way and connect, and then removes the conductor that links to each other with transformer in the Oil/Gas Pipe, removes oil-gas casing again.
Among the described step D, select reliably the firmly strong point (every two strong points, first a strong point is erected the place of tearing open with old of lightning arrester base and leave original position, again another strong point is propped up and removed the old support of lightning arrester base), add jack at log pile equipment is propped up, remove the old support of former lightning arrester base.
In the described step e, because of the seat that raises need according to " Electrical Engineer's handbook about relatively low, alternate, the relative heavy electric machinery of power transformer sleeve pipe live part to the minimum air void of low pressure winding terminal (220kV: 1500～1900mm relatively, alternate 1800～2250mm is to other winding terminals 1600～1800mm; 110kV: minimum air void is apart from 880mm.) bushing lifting seat of scene use is calculated, measures, transforms and assembles, the installation period of sleeve pipe and the seat that raises is long, tackled transformer and seal and rush the nitrogen processing same day behind the end-of-job, guarantee that the transformer internal pressure is pressure-fired (0.01～0.02Mpa).Bushing shell for transformer is installed when finishing should carry out oil-filled and Circulation and Hot Oil Spray.Should carry out first partial discharge and withstand voltage test before wire and transformer, wire and the GIS equipment connection.
In the described step F, the step that the new support of lightning arrester is installed is opposite with dismounting lightning arrester base support step.Strictly carry out respective holder construction assembling by drawing during assembling GIS collar supports seat, and support is proofreaied and correct, the adjustment level to assembling.
Among the described step G, what use during the fastening of dismounting Oil/Gas Pipe connecting tube is the gas cutting dismounting method, and the reply foundation of civil work carries out polishing after removing, and guarantees the smooth of foundation of civil work surface.Transform the female T-shaped support height of rear sleeve Height Adjustment mounting pipe according to transformer, adjust the cross-arm distance of T-shaped support according to electrical distance, the T-shaped support of adjusting is carried out bolted or four sides welding, the female porcelain vase of supporting of lifting pipe, then mounting pipe capital tool, assembling lifting.Consider to connect the length of copper core aluminum stranded wire according to transformer casing air and GIS outlet casing tube to the female air line distance of pipe, and guarantee that the sag of wire should meet designing requirement, the sag of three-phase conducting wire should be consistent in the same span.
By implementing such scheme, the invention has the beneficial effects as follows:
1) the enforcement difficulty is little: do not carry out the portal frame of basis transformation and building structure complexity, so that Construction traffic and workmen's erect-position and easy to adjust are safe and reliable.
2) short construction period: take full advantage of existing foundation of civil work and transform, shortened the engineering time.
3) transformer station keeps overall operation: under the prerequisite that shore 1# main transformer is stopped transport, and the change of shore 2# main transformer and corresponding operational mode, the network system abnormal running mode time is short, and interruption duration can shorten 3/4.
4) economic loss is little: adopt the inventive method to transform transformer GIS Oil/Gas Pipe connected mode, and the one, construction cost significantly reduces; The 2nd, interruption duration is short, on selling substantially without impact of Zhengzhou electrical network electric weight.But also guaranteed the power supply safety of Zhengzhou City.
Description of drawings:
Fig. 1 is outdoor GIS main transformer inlet wire interval sectional drawing;
Fig. 2 is that GIS of the present invention transform the female schematic diagram of pipe as by oil-gas casing direct connection arrangement;
Fig. 3 is the female steel framework of pipe of the present invention and supports the installation of porcelain insulator schematic diagram;
Fig. 4 is GIS sleeve pipe scheme of installation of the present invention.
Among the figure: transformer 1, oil-gas casing raise seat 2, oil-gas casing 3, bus bar canister 4, bus bar canister support 5, former basic 6, exntension tubs 7, new clothes GIS sleeve pipe 8, sleeve pipe be connected with pipe connect that copper core aluminum stranded wire 9, pipe are female 10, the female support insulator 11 of pipe, T-shaped shaft bar 12, bushing shell for transformer 13, bushing shell for transformer raise 14, T-shaped shaft bar cross-arm 15, GIS collar supports seat 16, GIS casing support 17, surge arrester support 18.
Embodiment:
The present invention is described in further detail below in conjunction with description of drawings and embodiment:
The remodeling method that GIS of the present invention transformer station oil-gas casing direct connection arrangement transform soft bus as may further comprise the steps:
A: the air chamber of needs transformation is carried out SF6 gas reclaim, vacuumize, pressure release processes.
B: remove relevant ground connection in flakes, use correct SF6 protective articles to open hand hole cover, remove the GIS conductor, confirm institute's influential decomposition bus bar canister conductor tab is all removed.It is female to remove first the L-type pipe, and it is female to remove the straight tube pipe again.According to on-site actual situations, to install firmly if the L-type pipe is female, the unlikely device security that affects can change working procedure according to actual conditions when removing straight tube pipe mother.Note position of centre of gravity during the female lifting of L-type pipe, use in case of necessity chain block to carry out leveling, then safety lifting.Straight tube pipe mother decomposes according to on-site actual situations or whole dismounting.Determine position of centre of gravity when long part is hung in recurrence, use in case of necessity chain block to carry out leveling, then set up the slide rope and prevent beat.
C: at first should reclaim the transformer oil in the transformer 1, when oil level is lower than the seat 2 that raises and exposes the overhead guard of transformer 1, remove the conductor that links to each other with transformer 1 in the Oil/Gas Pipe, remove again oil-gas casing 3.Transformer 1 oil-gas casing connects the 110kV side and is connected to the four-way connection, should lift by crane first this four-way and connect, and then extracts the conductor that links to each other with transformer 1 in the Oil/Gas Pipe, removes oil-gas casing again.
D: remove surge arrester support and will take A, B, C three-phase to cut respectively the method that shifts out simultaneously to carry out.Lightning arrester can't bear deadweight without outer support when removing because of old support, threatens device security, needs to use jack jacking lightning arrester.This uses six 1 ton of jack, supports first 3 jack at the center 5 centimeters in the outer part.(this step is to cause rear fulcrum to support for preventing because support is excessive, vacates corresponding position to guarantee finishing of rear step).Integral body is pulled out support to front 3 jack positions, again near 3 jack after the position support top of after-poppet.Jack before firmly rear dismounting the to be supported.Because old surge arrester support is 3, new support is 1, old support integral body must be pulled out.
E: install according to the rules the bushing shell for transformer rising seat 14 of casing air 13 at transformer 1 additional, cooperate high pressure to do the reference test of transformer 1.Because bushing shell for transformer rising seat 14 needs in-site measurement, transformation and assembling, the installation period of casing air 13 and bushing shell for transformer rising seat 14 is long, and tackled transformer and seal and rush the nitrogen processing same day behind the end-of-job.Transformer casing air 13 should carry out oil-filled and Circulation and Hot Oil Spray after installing and finishing.Afterwards transformer 1 is vacuumized with gas injection and process, cooperate high pressure to do the local discharge test of transformer 1.
F: surge arrester support 18 and GIS collar supports seat 16 are installed, and the step that surge arrester support 18 is installed is opposite with dismounting lightning arrester base support step.Strictly carry out respective holder construction assembling by drawing when GIS collar supports seat 16 is installed, and support is proofreaied and correct, the adjustment level to assembling, and after construction bolt is fastening, can carry out the work of lower step.
G: what use when removing the fastening of Oil/Gas Pipe connecting tube is the gas cutting dismounting method, and the reply foundation of civil work carries out polishing after removing, and guarantees the smooth of foundation of civil work surface.Transform the height of the female T-shaped support 11 of rear sleeve Height Adjustment mounting pipe according to transformer, adjust the distance of the cross-arm 15 of T-shaped support 11 according to electrical distance, lift by crane T-shaped support 11, guarantee that all foundation levels guarantee at the same level face, and guarantee that all homophase bases are at a straight line datum level.The T-shaped support 11 of adjusting is carried out bolted or four sides welding, guarantee solid and reliable.To supporting that porcelain vase 12 carries out insulation measurement, confirm female porcelain vase 12 qualified products of supporting of pipe, the female porcelain vase 12 of supporting of lifting pipe, then female 10 gold utensils of mounting pipe, assembling lifting.Slowly will manage female 10 and sling to 20mm place, pillar top, adjust the position, and begin to install, and guarantee to remove in each comfortable same straight line of three phase terminals head and tail section the suspenders such as suspender belt on the pipe female 10, finish lifting operation.Consider to connect the length of copper core aluminum stranded wire 9 according to transformer casing air and GIS outlet casing tube to the female air line distance of pipe, and guarantee that the sag of wire should meet designing requirement, the sag of three-phase conducting wire should be consistent in the same span.
Adopt the inventive method that GIS oil in transformer of electric substation gas bushing connected mode is transformed, in the situation about remaining unchanged on former basis, transformer oil gas bushing connected mode is transformed, changed the transformer oil gas bushing, bus bar canister support, surge arrester support have been changed, new clothes the GIS sleeve pipe, new clothes the GIS casing support, and local GIS has been carried out transformation etc.Practice of construction and interruption duration 11 days.The 220kV of this electric company Bridge Substation transformer oil gas bushing connected mode is transformed, and uses the portal frame supporting way, and transforming the duration is 42 days; The 110kVGIS of osiery transformer station and transformer connected mode adopt sets up the installation of portal frame supporting way, and the set-up time is 30 days.
Claims (7)
1. the remodeling method of a transformer and GIS power distribution equipment flexible connection structure is characterized in that may further comprise the steps:
A: gas reclaims: the air chamber of needs transformation is carried out SF6 gas reclaim, vacuumize, pressure release processes.
B: remove GIS bus bar canister and support thereof: the former bus bar canister of dividedly dismantling is also cut apart lifting, removes former bus bar canister support, keeps all original framework bases.
C: remove oil-gas casing and connection device thereof: reclaim transformer oil, remove the conductor that oil-gas casing links to each other with transformer, remove oil-gas casing.
D: remove lightning arrester base and support: select reliably the firmly strong point, add jack equipment is propped up, remove former lightning arrester base and support.
E: the transformer casing air is installed: relatively low, alternate, the relative heavy electric machinery according to power transformer sleeve pipe live part is installed casing air rising seat and transformer casing air to the minimum air void of low pressure winding terminal.
F: lightning arrester base support and GIS collar supports seat are installed: the step that the lightning arrester base support is installed is opposite with the step of removing the old base support of lightning arrester, and at lightning arrester base bracket basis assembling GIS collar supports seat.
G: pipe is female to be installed: the connection of hard tube mother, flexible conductor and wire and GIS equipment.
2. the remodeling method of transformer as claimed in claim 1 and GIS power distribution equipment flexible connection structure, it is characterized in that: use correct SF6 protective articles to open hand hole cover among the described step B, remove the GIS conductor, affirmation is all removed institute's influential decomposition bus bar canister conductor tab, the former bus bar canister of dividedly dismantling is also cut apart lifting, remove former bus bar canister support, keep all original framework bases.Dividedly dismantling is removed former bus bar canister and is cut apart lifting, removes former oil-gas casing, removes former bus bar canister support, keeps all original framework bases.
3. the remodeling method of transformer as claimed in claim 1 and GIS power distribution equipment flexible connection structure, it is characterized in that: carry out among the described step C at first should reclaiming transformer oil before the bushing shell for transformer transformation, oil level is lower than the seat that raises and exposes the transformer overhead guard, remove the conductor that links to each other with transformer in the Oil/Gas Pipe, remove again oil-gas casing.The transformer oil tracheae connects the 110kV side and is connected to the four-way connection, should lift by crane first this four-way and connect, and then removes the conductor that links to each other with transformer in the Oil/Gas Pipe, removes oil-gas casing again.
4. the remodeling method of transformer as claimed in claim 1 and GIS power distribution equipment flexible connection structure, it is characterized in that: among the described step D, select reliably the firmly strong point (every two strong points, first a strong point is erected the place of tearing open with old of lightning arrester base and leave original position, again another strong point is propped up and removed the old support of lightning arrester base), add jack at log pile equipment is propped up, remove the old support of former lightning arrester base.
5. the remodeling method of transformer as claimed in claim 1 and GIS power distribution equipment flexible connection structure, it is characterized in that: in the described step e, the bushing lifting seat that the scene is used calculates, measures, transforms and assembles, the installation period of sleeve pipe and the seat that raises is long, tackled transformer and seal and rush the nitrogen processing same day behind the end-of-job, guarantee that the transformer internal pressure is pressure-fired (0.01～0.02Mpa).Bushing shell for transformer is installed when finishing should carry out oil-filled and Circulation and Hot Oil Spray.Should carry out first partial discharge and withstand voltage test before wire and transformer, wire and the GIS equipment connection.
6. the remodeling method of transformer as claimed in claim 1 and GIS power distribution equipment flexible connection structure is characterized in that: in the described step F, the new step that supports of lightning arrester is installed and to remove lightning arrester base support step opposite.Strictly carry out respective holder construction assembling by drawing during assembling GIS collar supports seat, and support is proofreaied and correct, the adjustment level to assembling.
7. the remodeling method of transformer as claimed in claim 1 and GIS power distribution equipment flexible connection structure, it is characterized in that: among the described step G, what use when removing the fastening of Oil/Gas Pipe connecting tube is the gas cutting dismounting method, the reply foundation of civil work carries out polishing after removing, and guarantees the smooth of foundation of civil work surface.
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| CN201110236339.8A CN102957104B (en) | 2011-08-18 | 2011-08-18 | The remodeling method of transformer and GIS power distribution equipment flexible connection structures |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103381996A (en) * | 2013-06-28 | 2013-11-06 | 国家电网公司 | HGIS self-adaption emergency first-aid repair device and applications thereof |
| CN107424725A (en) * | 2017-08-03 | 2017-12-01 | 特变电工沈阳变压器集团有限公司 | Transformer anti-seismic structure |
| CN107742850A (en) * | 2017-11-10 | 2018-02-27 | 云南省送变电工程公司 | The oil-gas casing assembly and disassembly methods of connection exchange 500kV oil-immersed type transformers and GIS tube type bus |
| CN113964707A (en) * | 2021-10-19 | 2022-01-21 | 上海宝冶冶金工程有限公司 | Extension method of box-type GIS busbar barrel |
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| JP2006340574A (en) * | 2005-06-06 | 2006-12-14 | Mitsubishi Electric Corp | Method and device for assembling gas-insulated switchgear |
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| JP2006340574A (en) * | 2005-06-06 | 2006-12-14 | Mitsubishi Electric Corp | Method and device for assembling gas-insulated switchgear |
| CN201813068U (en) * | 2010-06-22 | 2011-04-27 | 湖北省电力勘测设计院 | Distribution structure of support tubular bus leading and incoming equipment of ultra-high voltage main transformer incoming lines |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103381996A (en) * | 2013-06-28 | 2013-11-06 | 国家电网公司 | HGIS self-adaption emergency first-aid repair device and applications thereof |
| CN107424725A (en) * | 2017-08-03 | 2017-12-01 | 特变电工沈阳变压器集团有限公司 | Transformer anti-seismic structure |
| CN107742850A (en) * | 2017-11-10 | 2018-02-27 | 云南省送变电工程公司 | The oil-gas casing assembly and disassembly methods of connection exchange 500kV oil-immersed type transformers and GIS tube type bus |
| CN113964707A (en) * | 2021-10-19 | 2022-01-21 | 上海宝冶冶金工程有限公司 | Extension method of box-type GIS busbar barrel |
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| CN102957104B (en) | 2017-05-31 |
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Inventor after: Tian Fenglan Inventor after: Yang Lin Inventor after: Shi Feng Inventor after: Xu Xianan Inventor after: Zhao Hang Inventor after: Jing Zhongzhao Inventor after: He Tianji Inventor after: Qi Chaoliang Inventor after: Zhao Yong Inventor after: Su Di Inventor before: Shi Feng Inventor before: Tian Fenglan Inventor before: Guo Rui Inventor before: Lan Qi Inventor before: Liu Yiqiang Inventor before: Yuan Yang Inventor before: Li Hongbo Inventor before: Wang Yan |
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Effective date of registration: 20170426 Address after: 450006, Zhengzhou province high tech Zone, Ruida Road, No. 96, No. Applicant after: Zhengzhou Huali Information Technology Co., Ltd. Applicant after: Zhengzhou electric company of State Grid Henan Power Supply Company Applicant after: State Grid Henan Electric Power Company Applicant after: State Grid Corporation of China Address before: 450006 Huaihe Road, Henan, China, No. 9, No. Applicant before: Henan Electric Power Company Zhengzhou Power Supply Branch |
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