CN201430367Y - 110kV/ 220kV voltage class gas insulated switchgear - Google Patents
110kV/ 220kV voltage class gas insulated switchgear Download PDFInfo
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- CN201430367Y CN201430367Y CN2009201392739U CN200920139273U CN201430367Y CN 201430367 Y CN201430367 Y CN 201430367Y CN 2009201392739 U CN2009201392739 U CN 2009201392739U CN 200920139273 U CN200920139273 U CN 200920139273U CN 201430367 Y CN201430367 Y CN 201430367Y
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- bus
- isolating switch
- insulated switchgear
- gas insulated
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Abstract
The utility model relates to a gas insulated switchgear, in particular to a 110kV/ 220kV voltage class gas insulated switchgear, which is an innovation based on an original HGIS, thus referred to as XHGIS for short. The gas insulated switchgear is characterized in that provided is a novel gas insulated switchgear without busbar disconnecting switch; by means of application of the gas insulated switchgear in power distribution units, a novel power distribution unit which is convenient to install, extend and run. The application scheme needs less land usage, can make good use of space below thebusbar, and reduce land use by 30% to 40% than that of the typically designed outdoor AIS scheme. Besides, the technical scheme requires low investment, needs lower investment relative to HGIS, and the comprehensive investment cost is not at a disadvantage any longer if compared with the AIS scheme. Simultaneously, the 110kV/ 220kV voltage class gas insulated switchgear has the advantages that power of the busbar does not need to be cut off, busbar running is not influenced, and the reliability is high when a circuit breaker is overhauled, accordingly makes full use of SF6 gas insulated switchgear, and overcomes defects with respect to overhaul and extension.
Description
Technical field
The utility model relates to a kind of compound electric apparatus, particularly a kind of 110kV/220kV electric pressure combined electrical apparatus.Combined electrical apparatus of the present utility model is the innovation on original HGIS basis, therefore abbreviates it as XHGIS, and the meaning of central " X " expression " newly " has the meaning novel and innovation.
Background technology
The related definition that the utility model is related:
AIS: referring to the power distribution equipment that single devices is arranged as dielectric with air, for including the combination of single devices such as circuit breaker, isolating switch, earthed switch, bus, instrument transformer, lightning arrester, is a kind of switchgear combination of conventional open type.
GIS (Gas Insulated Switchgear): refer to sulphur hexafluoride (SF
6) gas is as dielectric, the equipment assembly that a plurality of equipment and bus are combined, i.e. SF
6Fully closed combined electric unit.It with in the transformer station except that large-scale primary equipment such as transformer, comprise primary equipments such as circuit breaker, isolating switch, earthed switch, voltage transformer, current transformer, lightning arrester, bus, cable termination, turnover thread casing, organically be combined into an integral body through optimal design.
HGIS (Hypid Gas Insulated Switchgear): refer to sulfur hexafluoride gas as dielectric, the electrical equipment that a plurality of equipment (circuit breaker, bus isolating switch, outlet isolating switch, instrument transformer, lightning arrester etc. can be arranged as required) are combined, and bus with air as dielectric, be not included in the combined electrical apparatus.HGIS is a kind of high-voltage switch gear unit equipment between GIS and AIS.Structure and the GIS of HGIS are basic identical, but it does not comprise bus equipment.Bus is not loaded on the SF6 air chamber, exposes.
The PASS switch combined electrical appliance: with sulfur hexafluoride gas as dielectric, only with the combined electrical apparatus of combinations (not comprising the outlet isolating switch) such as bus isolating switch, circuit breaker, current transformer at same air chamber.
High voltage distribution installation in " modular design (the 220kV transformer station fascicle) " of State Grid Corporation of China's promulgation in 2005 mainly contains three kinds by selected apparatus-form difference, i.e. AIS, GIS, HGIS.More than in three kinds of power distribution equipments, AIS is a kind of conventional scheme, but its service conditions is more abominable, is placed on without obstruction in the transformer station, month after month is subjected to the effect of various natural environment and climate conditions throughout the year, is easy to generate the fault of machinery or electric aspect.Along with the increase of the aging and power load of equipment, the power outage that each equipment of AIS causes is in rising trend, is threatening the security of operation of electric power system; It is low that but AIS has equipment investment, and enlarging is convenient, and during the maintenance circuit breaker, bus does not need advantages such as power failure.The GIS scheme comprises that with all devices among the AIS bus is combined into a kind of module by a kind of closed air chamber, with SF
6Gas is as dielectric, shortened insulation distance greatly, saved a large amount of land areas, also improved operational reliability greatly, but this product involves great expense, and is unfavorable for promoting the use of, and its equipment is corollary equipment, it is all very inconvenient to extend, overhaul, and needs the long period that has a power failure, and coverage is wide.The HGIS scheme derives from the GIS scheme, except bus with the air insulation, all the other equipment are identical with GIS all to be hermetically sealed at SF
6In the air chamber, this is because the maintenance of bus is little, and it is broken away from closed air chamber, the expense that can save quite a few enclosed busbar pipe.Also there are matching problem in the second protection of PASS switch and GPF (General Protection False; switchgear itself does not also reach the level of non-maintaining or very little maintenance; and the operation and management level of China's electrical network also is not very high; make the PASS switch select supporting protection equipment that limitation is arranged, can not the isolated fault point, maintenance power failure scope is big etc., and shortcoming is comparatively outstanding.
More above-mentioned four kinds of arrangement: AIS, GIS, HGIS, PASS switch,
● from taking up an area of, the floor space maximum of AIS scheme is taken as 100%, and GIS scheme floor space minimum is about 11%～23% (correspondence is within doors by cable outlet and overhead outlet), arranges approximately 40% outside the room, and the occupation of land of HGIS and PASS scheme is about 80%;
● from the operational reliability aspect, the GIS reliability is the highest, secondly is HGIS and PASS scheme, and AIS is relatively poor;
● from the investment angle, AIS is most economical, and with 100% expression, GIS is about 140%～145%, and HGIS is about 110%～115%, and PASS adds that the outlet isolating switch also almost is 110%～115%;
● compare its maintenance workload, the AIS maximum, the GIS minimum, HGIS and PASS are placed in the middle;
● Kuo Jian complexity relatively, GIS is least easily, and the enlarging interruption duration is long, and the enlarging of AIS, HGIS, PASS scheme is more convenient;
● relatively overhaul the influence of circuit breaker to power supply, in GIS, HGIS and the PASS scheme, when overhauling because of circuit breaker, in the process that vacuumizes, fills sulfur hexafluoride gas, bus will have a power failure, and the AIS scheme does not need to have a power failure when circuit breaker overhauls.
By the Pros and Cons of various technical schemes as can be seen in the above-mentioned comprehensive comparison sheet.Yet, with regard to the HGIS scheme, it has been inherited, and advantage-operational reliability of GIS is higher, floor space is less, advantage-the enlarging that also has AIS simultaneously is more convenient, but equipment investment is still higher, and also have a very big weak point: promptly when circuit breaker overhauled, main bus bar can have a power failure in short-term.This is because in the HGIS scheme, circuit breaker CB and bus isolating switch DS are adjacent air bound (with reference to accompanying drawing 1), the CB maintenance finishes when vacuumizing inflation, the decompression of must exitting of the air chamber of the adjacent air bound DS of CB, the corresponding bus that the DS of this moment links to each other should have a power failure with the reliability of insulation in guaranteeing in the operating process.The having a power failure in short-term of main bus bar will bring that tremendous loss and operation are gone up, very inconvenient in uses.
Summary of the invention
The purpose of this utility model is but a kind of hotline maintenance to be provided and to reduce the 110kV/220kV electric pressure combined electrical apparatus of investing according to the deficiencies in the prior art part.
Combined electrical apparatus in the utility model is realized by following approach:
110kV/220kV electric pressure combined electrical apparatus, include circuit breaker, the outlet isolating switch and first instrument transformer, two instrument transformers of second instrument transformer, its structural feature is, it is connected to: the outlet isolating switch, first instrument transformer, circuit breaker, second instrument transformer is electrically connected in series in regular turn, and be dielectric with the sulfur hexafluoride gas, with the outlet isolating switch that is electrically connected, instrument transformer and circuit breaker are enclosed in the air chamber of insulating gas, outlet is connected on the sulphur hexafluoride outlet sleeve pipe of outlet isolating switch one side, second instrument transformer, one side by sulphur hexafluoride bus bar side sleeve pipe be connected with the bus isolating switch of air as dielectric, the other end of bus isolating switch connects same with the bus of air as dielectric.
The utility model can provide a kind of SF
6The novel power distribution equipment of the combined electrical apparatus+air-insulated bus isolating switch of gas sealing.In transformer station, the principal element of the reliability of decision turnover line loop is a series element: circuit breaker, instrument transformer and outlet isolating switch, even bus isolating switch is with air insulation, its failure rate is very low, if the words of double-bus, need two groups of bus isolating switchs, for being connected in parallel, its failure rate is just lower.In addition, the air-insulated busbar fault rate of 110kV/220kV is about 3 times/100 year, for power distribution equipment outside the room that adopts air-insulated double-bus, under the lower situation of busbar fault rate, the probability that the double-bus simultaneous faults is stopped transport is just lower, greatly about 9 * 10
-4Inferior/year.The utility model will be used SF originally
6Gas isolated bus isolating switch is separated from HGIS, become air-insulated bus isolating switch, reliability effect to whole loop is very little, but bring an especially big advantage, i.e. during circuit breaker maintenance, stop transport in its this loop line of needs road, and the bus that is connected with other working lines does not need to have a power failure, this just can eliminate in the circuit breaker maintenance process, and bus has the shortcoming of short time power failure, and therefore maintenance is convenient; On the other hand, bus isolating switch adopts air insulation, can reduce the SF of a group and certain-length
6The enclosed busbar of insulation can reduce by 25 meters left and right sides SF for a loop 220kV
6Enclosed busbar and three SF
6Sleeve pipe can reduce by 400,000 yuan of costs of equipment approximately, can reduce the investment of quite a few.That is to say, the utility model with bus isolating switch with air as dielectric, be placed on outside the combined electrical apparatus, both can be when circuit breaker have overhauled, bus does not have a power failure, realize hotline maintenance, can also save investment, reduce cost, make the advantage of the existing AIS of technical scheme described in the utility model: economy, circuit breaker maintenance do not have a power failure, extends and make things convenient for, the advantage that the GIS scheme is arranged again: operational reliability height, land used are few, and HGIS has very big optimization relatively.
The utility model can further be specially:
Instrument transformer is a kind of current transformer, and first instrument transformer and second instrument transformer are arranged respectively and be installed in the circuit breaker both sides.
In the conventional open type equipment combination,, may cause the dead band in the protection, current transformer is installed in the circuit breaker both sides, can eliminate the dead band in such protection because that current transformer can only be arranged in circuit breaker is one-sided.
Current transformer can be an electromagnetic current transducer, also can be electronic current mutual inductor.
, when using on the power distribution equipment at double bus scheme, comprise based on above-mentioned 110kV/220kV electric pressure combined electrical apparatus as the lower part:
First group of bus, second group of bus, bus-bar frame, bus and outlet associating framework,
The aforesaid XHGIS combined electrical apparatus of one cover, outlet voltage transformer, lightning arrester, first bus isolating switch, second bus isolating switch;
Begin from substation district enclosure wall that advancing equipment is as follows in regular turn to major trunk roads: outlet voltage transformer, lightning arrester, XHGIS combined electrical apparatus, second bus isolating switch and first bus isolating switch;
First bus isolating switch connects first group of bus, second bus isolating switch connects second group of bus, the bus bar side sleeve pipe of XHGIS combined electrical apparatus carries out the frame height with second bus isolating switch employing pipe bus and is connected, and a transportation access path is provided between them;
The outlet sleeve pipe of XHGIS combined electrical apparatus and outlet voltage transformer, lightning arrester are connected with corresponding outlet in bus and outlet associating frame underneath.
In the design of original HGIS power distribution equipment, because external bus and outlet circuit are to need certain safe distance, for ease of with bus and the direct line of outlet circuit, enclosed busbar length must extend, to guarantee the safe distance between outlet and the bus, must cause increasing land area like this.And the utility model independently goes out integral device with bus isolating switch, and with air insulation, this is with regard to the flexible installation site of bus isolating switch, with it away from SF
6The combined electrical apparatus of gas sealing, outlet just can be directly external, simplified construction procedure.Original access path can also be arranged on bus isolating switch and SF like this
6On the empty position of reserving of institute, shorten the apparatus arrangement width of transformer station on the whole between the combined electrical apparatus of gas sealing, from occupation of land, just can save suitable land area, on this meaning, also saved suitable investment, particularly in the land used anxiety.
When 110kV/220kV electric pressure combined electrical apparatus is used for the power distribution equipment of single bus scheme, as long as first bus, bus-bar frame and the cancellation of corresponding first bus isolating switch just can.
In sum, characteristics of the present utility model are, provide a kind of not with the New Combined Switchgear of bus isolating switch and the application in power distribution equipment thereof, use thisly, just can design the novel power distribution equipment of a kind of installation, enlarging, operation convenient (because between bus isolating switch and combined electrical apparatus can reasonable Arrangement go out a transport channel) not with the combined electrical apparatus of bus isolating switch; Whole technical proposal land used described in the utility model is few, can make full use of bus below spatial placement combined electrical apparatus described in the utility model and transport channel, and so, AIS power distribution equipment scheme is taken up an area of minimizing 30%～40% outside the room of comparable modular design; Investment of the present utility model is also few, and relative HGIS is under the prerequisite of its bus isolating switch and air-insulated isolating switch equivalence, owing to reduced by one group of SF
6The enclosed busbar pipe of sleeve pipe and certain-length is added the expropriation of land of minimizing and relevant civil engineering costs thereof etc., and its comprehensive method of investment expense is compared with the AIS scheme and no longer is in a disadvantageous position; Simultaneously, bus did not need to have a power failure (only need this loop of maintenance to have a power failure, scope is identical with AIS equipment) when the utility model also had the maintenance circuit breaker, did not influence the bus operation, and reliability had both been given full play to SF than higher characteristics
6The advantage of combined electrical apparatus, can overcome again its maintenance, the enlarging aspect inferior position.
Description of drawings
Figure 1 shows that the structural representation of the described HGIS of the utility model background technology;
Figure 2 shows that the interval sectional schematic diagram of HGIS scheme power distribution equipment described in the utility model.
Figure 3 shows that the structural representation of XHGIS described in the utility model;
Figure 4 shows that the described XHGIS scheme of the utility model most preferred embodiment cubicle sectional schematic diagram.
Figure 5 shows that XHGIS scheme single bus scheme cubicle sectional schematic diagram described in the utility model.
Below in conjunction with embodiment the utility model is described further.
Specific embodiment
Most preferred embodiment:
With reference to accompanying drawing 3,110kV/220kV electric pressure combined electrical apparatus includes circuit breaker CB, instrument transformer CT and outlet isolating switch DS, and instrument transformer CT is a current transformer, has two groups, comprises the first current transformer CT1 and the second current transformer CT2; Outlet isolating switch DS one end connects outlet sleeve pipe BSG1, and the other end connects the first current transformer CT1; Two groups of current transformers are placed on the both sides of circuit breaker CB respectively, and CB is electrically connected with circuit breaker; The second current transformer CT2 connection bus side sleeve pipe BSG2; And with sulphur hexafluoride (SF
6) gas is dielectric, and outlet isolating switch DS, instrument transformer CT and the circuit breaker CB that is electrically connected is enclosed in SF
6In the insulating gas air chamber, as dielectric, the one end is electrically connected with the circuit breaker CB that is closed by bus bar side sleeve pipe BSG2 and the current transformer that is closed bus isolating switch with air, and the other end connects same with the bus of air as dielectric.
Application example below in conjunction with the XHGIS combined electrical apparatus is described further the utility model:
With reference to accompanying drawing 2 and accompanying drawing 4, for convenience, we compare: accompanying drawing 2 is schematic diagrames that prior art HGIS uses in power distribution equipment, and accompanying drawing 4 is schematic diagrames that combined electrical apparatus described in the utility model is used in power distribution equipment.
See accompanying drawing 2, and with reference to accompanying drawing 1, during the HGIS wiring, its first group of bus IM need be connected SF respectively with second group of bus IIM
6Gas sealing and two adjacent bus isolating switch DS1 and DS2 in order to guarantee the distance of two groups of buses, need increase the about 5mSF of a segment length between two bus isolating switchs for the HGIS of 220kV
6The enclosed busbar 1 of insulation.In addition, because safe distance is not enough between HGIS outlet sleeve pipe BSG1 and the second group of bus IIM, therefore also need to increase the SF of about 3m
6Insulation enclosed busbar 2 is to increase safe distance.Because the integral device of HGIS is longer, be L1, nearly 13m can only utilize the space of first group of bus IM below to set up the transportation access path, be the comparison inconvenience aspect transportation, maintenance, the installation like this, the gap length L2 of corresponding 220kV power distribution equipment reaches 37m.
See accompanying drawing 4, and, be example that the novel application of XHGIS combined electrical apparatus in power distribution equipment described in the utility model comprises as the lower part with the double-bus with reference to accompanying drawing 1:
First group of bus IM, second group of bus IIM, bus-bar frame, bus and outlet associating framework;
The aforesaid XHGIS combined electrical apparatus of one cover, outlet voltage transformer pt, lightning arrester MOA, the first bus isolating switch MDS1, the second bus isolating switch MDS2;
Begin from substation district enclosure wall that advancing equipment is as follows in regular turn to major trunk roads: outlet voltage transformer pt, lightning arrester MOA, XHGIS combined electrical apparatus, the second bus isolating switch MDS1 and the first bus isolating switch MDS2;
The first bus isolating switch MDS1 connects first group of bus IM, the second bus isolating switch MDS2 connects second group of bus IIM, the bus bar side sleeve pipe BSG2 of XHGIS combined electrical apparatus carries out the frame height with second bus isolating switch MDS2 employing pipe bus and is connected, and a transportation access path is provided between them;
The outlet sleeve pipe BSG1 of XHGIS combined electrical apparatus and outlet voltage transformer pt, lightning arrester MOA are connected with corresponding outlet in bus and outlet associating frame underneath.
When wiring, the two groups of air-insulated first bus isolating switch MDS1 and the second bus isolating switch MDS2 are arranged in the below of first group of bus IM, can reserve certain space for the layout of XHGIS like this.The bus bar side sleeve pipe height of connection bus isolating switch is higher among the XHGIS, connect up in built on stilts mode between itself and the second bus isolating switch MDS2, adopt the pipe bus to connect, so just, can make full use of the space of second group of bus IIM below, set out a transportation access path, this passage is transportation, installation, repair and maintenance passage, this passage both had been close to XHGIS like this, also contiguous two groups of bus isolating switchs, at transportation, erection unit, repair and maintenance equipment aspect is very convenient.First group of bus IM below, the two groups of bus isolating switchs that then distribute, the space of such two groups of buses below just is fully used, and can clearly find out from figure.In addition, because the outlet sleeve pipe BSG1 of XHGIS under the control of bus isolating switch, passage and equipment of itself length, can directly be connected with outlet below its close outlet.XHGIS for 220kV just can omit about 5m SF in the accompanying drawing 2
6The enclosed busbar 1 of insulation and the enclosed busbar 2 of 3m, greatly saved the expense of equipment, the unitary construction length of XHGIS combined electrical apparatus is L3, be about about 4m, original relatively HGIS is much smaller for volume, and the transportation access path is built up on its limit, is very beneficial to XHGIS, have good accessibility, be convenient to people's cleaning and carry out plant maintenance.The gap length L4 of corresponding 220kV power distribution equipment also only needs 35m.
When maintenance circuit breaker CB, MDS1, the MSD2 edge of a knife of conventional open type are opened, and circuit breaker CB both sides earthed switch closes, and makes and forms an obvious visible fracture between XHGIS and the charged bus, meet the custom of operating maintenance for many years, guaranteed operating maintenance personnel's safety.
The above is the power distribution equipment example that is applied to double bus scheme, when being used for the power distribution equipment of single busbar connection, only needing will be near bus, bus-bar frame and the corresponding bus isolating switch cancellation of major trunk roads, and the size of a closing surface is adjusted accordingly and can realizes equally that just circuit breaker maintenance process median generatrix does not need to have a power failure in short-term; Can make full use of the spatial placement transportation maintaining roadway of bus below, reach and both save land used, the purpose of convenient again installation, transportation, maintenance is seen accompanying drawing 5, the about 27m of gap length L5 of corresponding 220kV power distribution equipment.
It is same as the prior art that the utility model is not stated part.
Claims (3)
1,110kV/220kV electric pressure combined electrical apparatus, include circuit breaker, the outlet isolating switch and first instrument transformer, two instrument transformers of second instrument transformer, its structural feature is, it is connected to: the outlet isolating switch, first instrument transformer, circuit breaker, second instrument transformer is electrically connected in series in regular turn, and be dielectric with the sulfur hexafluoride gas, with the outlet isolating switch that is electrically connected, instrument transformer and circuit breaker are enclosed in the air chamber of insulating gas, outlet is connected on the sulphur hexafluoride outlet sleeve pipe of outlet isolating switch one side, second instrument transformer, one side by sulphur hexafluoride bus bar side sleeve pipe be connected with the bus isolating switch of air as dielectric, the other end of bus isolating switch connects same with the bus of air as dielectric.
2,110kV/220kV electric pressure combined electrical apparatus according to claim 1, it is characterized in that: instrument transformer is a kind of current transformer, first instrument transformer and second instrument transformer are arranged respectively and are installed in the circuit breaker both sides.
3,110kV/220kV electric pressure combined electrical apparatus according to claim 2, it is characterized in that: current transformer can be an electromagnetic current transducer, also can be electronic current mutual inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201392739U CN201430367Y (en) | 2009-06-26 | 2009-06-26 | 110kV/ 220kV voltage class gas insulated switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201392739U CN201430367Y (en) | 2009-06-26 | 2009-06-26 | 110kV/ 220kV voltage class gas insulated switchgear |
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| Publication Number | Publication Date |
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| CN201430367Y true CN201430367Y (en) | 2010-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201392739U Expired - Lifetime CN201430367Y (en) | 2009-06-26 | 2009-06-26 | 110kV/ 220kV voltage class gas insulated switchgear |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368593A (en) * | 2011-12-01 | 2012-03-07 | 四川电力设计咨询有限责任公司 | Line layout structure of double-busbar double-subsection GIS (Gas Insulated Switchgear) power distribution unit |
| CN102368594A (en) * | 2011-12-01 | 2012-03-07 | 四川电力设计咨询有限责任公司 | Double-bus single-segment GIS power distribution device line arrangement structure |
| CN102377111A (en) * | 2011-12-01 | 2012-03-14 | 四川电力设计咨询有限责任公司 | Duplicate-busbar arrangement structure with single busbar subsection GIS (Geographic Information System) power distribution units |
| CN103078261A (en) * | 2013-01-15 | 2013-05-01 | 江苏省电力设计院 | 500kV outdoor HGIS (hybrid gas insulated switchgear) arrangement method in extra-high-voltage transformer substation |
| CN105870827A (en) * | 2016-05-12 | 2016-08-17 | 山东泰开高压开关有限公司 | Compact type 800-kV compound combined electrical appliance |
| CN106253124A (en) * | 2016-08-31 | 2016-12-21 | 中国电力技术装备有限公司郑州电力设计院 | 750kV transformer station innovation yi word pattern GIS arrangement |
-
2009
- 2009-06-26 CN CN2009201392739U patent/CN201430367Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368593A (en) * | 2011-12-01 | 2012-03-07 | 四川电力设计咨询有限责任公司 | Line layout structure of double-busbar double-subsection GIS (Gas Insulated Switchgear) power distribution unit |
| CN102368594A (en) * | 2011-12-01 | 2012-03-07 | 四川电力设计咨询有限责任公司 | Double-bus single-segment GIS power distribution device line arrangement structure |
| CN102377111A (en) * | 2011-12-01 | 2012-03-14 | 四川电力设计咨询有限责任公司 | Duplicate-busbar arrangement structure with single busbar subsection GIS (Geographic Information System) power distribution units |
| CN103078261A (en) * | 2013-01-15 | 2013-05-01 | 江苏省电力设计院 | 500kV outdoor HGIS (hybrid gas insulated switchgear) arrangement method in extra-high-voltage transformer substation |
| CN105870827A (en) * | 2016-05-12 | 2016-08-17 | 山东泰开高压开关有限公司 | Compact type 800-kV compound combined electrical appliance |
| CN106253124A (en) * | 2016-08-31 | 2016-12-21 | 中国电力技术装备有限公司郑州电力设计院 | 750kV transformer station innovation yi word pattern GIS arrangement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100324 Effective date of abandoning: 20090626 |