CN201877702U - Compact 500kV main transformer 35kV side structure - Google Patents
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- CN201877702U CN201877702U CN2010206551791U CN201020655179U CN201877702U CN 201877702 U CN201877702 U CN 201877702U CN 2010206551791 U CN2010206551791 U CN 2010206551791U CN 201020655179 U CN201020655179 U CN 201020655179U CN 201877702 U CN201877702 U CN 201877702U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
A compact 500kV main transformer 35Kv side structure comprises an A, B and C three-phase transformer. The three-phase transformer is connected with a general loop through a delta bus; the general loop is connected with a 35kV bus; the 35kV bus is connected with branch loops; each branch loop comprises a capacitance branch loop and a reactance branch loop; each capacitance branch loop comprises a shunt capacitor bank and a series reactor which is connected with the shunt capacitor bank; each reactance branch loop comprises a three-phase reactor; the delta bus finishes delta winding through a dry insulation bus; the A phase, the B phase and the C phase in each shunt capacitor bank are superposed in each capacitance branch loop; and the reactor is a superposed dry shunt hollow reactor or a magnetic shielding shunt reactor in each capacitance branch loop.
Description
Technical field
The utility model relates to a kind of compact 500kV main transformer 35kV side structure.
Background technology
China 500kV transformer station adopts the 550kV/220kV/35kV tertiary voltage, and low-pressure side inserts reactive power compensator and station electricity consumption, is the important component part of transformer station.
In transformer station's design, generally stress the design optimization of voltage levels at present,, improve reliability, reduction floor space, the project cost that reduces of transformer station by optimizing measures such as wiring pattern, employing compact device, compression power distribution equipment size.But the main transformer low-pressure side is still continued initial thinking and pattern, all adopt conventional equipment and conventional power distribution equipment, there is no obvious development for many years changes, take up an area of that very area is big, as adopting in the 500kV transformer station of compact device in the high pressure side, the occupation of land of main transformer low-pressure side reaches 26 ~ 31% of the full station gross area.
Along with the high speed development of power grid construction, transformer station's scale and capacity are increasing, and the problem that main transformer low-pressure side equipment increases, floor space is big is also more and more outstanding.Because the soil is non-renewable resources; for further implementing the fundamental state policy of rationally utilizing the soil, protecting farmland conscientiously; press for the optimal design of carrying out the main transformer low-pressure side, the solution of these problems will promote the global design level of transformer station, improves operational reliability.
Fig. 1 is existing 500kV main transformer 35kV side structure design, and floor space is very big, and it is mainly reflected in following several aspect.
As shown in Figure 2, existing 500kV main transformer 35kV △ busbar is mainly open type, and promptly the lead-out terminal that extracts from three single-phase transformers is directly finished the △ winding in A, B, C triple line.This mode so floor space is very big, and expends the consumption of bus owing to be subjected to the restriction of electric clear distance between the common bus very much.
The low pressure shunt reactor is one of reactive power compensator important in the 500kV transformer station, and the absorption electrical network residue charge power that main effect is a ladder guarantees that voltage is stabilized in the scope of permission.Because of it is installed in the main transformer low-pressure side, thereby be called lowly anti-, to be installed on high-tension side height anti-to be different from.For 500kV transformer station, the low anti-form of using in the engineering has " dry-type hollow formula " and " oil immersion iron core formula " two kinds at present.
(1) oil immersion iron core formula shunt reactor
The structure of low pressure oil immersion core-type reactor is similar to transformer, mainly is made up of parts such as coil, iron core and fuel tanks, have reliability height, equipment size little, arrange advantage such as compactness.
The anti-main inferior position of oil is to cost an arm and a leg, and in the oily antibody a large amount of insulation cold oils is arranged simultaneously, during installation oil sump and fire compartment wall need be set, and noise is very big when moving in addition, currently only uses to some extent in the small part area.
(2) dry type hollow shunt reactor
Dry type hollow shunt reactor is phase structure, adopt cylindric epoxy resin enclosed formula coil, reactor is sealed by several coils that constitute concentric structure and is composed in parallel, no iron core, magnetic conductive media is an air, and whole reactor is simple in structure, compact, can long-time running out of doors under the weather conditions, plant maintenance is simple and convenient, and project cost is relatively cheap.Because above-mentioned advantage is conventional dried anti-by " 330 ~ 500kV electric substation reactive power compensator designing technique regulation " (DL 5014-92) preferential recommendation, and engineering extensive use at home.
Conventional do anti-shortcoming also clearly, itself size is bigger, and must satisfy mutual antimagnetic distance, generally be arranged as " isosceles triangle " or " in-line ", take up an area of bigger, as Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, among the figure, what the frame of broken lines of reactor was represented is antimagnetic distance.
Conventional capacitor installation all adopts the phase-splitting arrangement in transformer station, cause floor space too big, as Fig. 7, shown in Figure 8.Among the figure, every phase reactor is contained on the pylon, and every phase reactor is divided into two sections, and such arrangement has taken a large amount of land areas.
The utility model content
The purpose of this utility model provides the structural design of the little compact 500kV main transformer 35kV side of a kind of floor space.
For achieving the above object, the utility model is by the following technical solutions:
The utility model comprises A, B, C three-phase transformer, and three-phase transformer connects total loop by the △ bus, and total loop connects the 35kV bus, and the 35kV bus connects each duplexure, and described duplexure comprises electric capacity duplexure and reactance duplexure; Described electric capacity duplexure comprises Shunt Capacitor Unit and the series reactor that is connected with Shunt Capacitor Unit; Described reactance duplexure comprises three-phase reactor, and described △ bus adopts the dry insulation bus to finish the △ winding; In described electric capacity duplexure, with the A in each Shunt Capacitor Unit, B, C three superimposed placements; In described reactance duplexure, described reactor is stacked dry type air-core reactor in parallel or magnetic screen shunt reactor.
Described △ bus adopts the dry insulation bus to finish the △ winding and is meant:
The a lead-out terminal of A phase transformer is connected with the y lead-out terminal of B phase transformer by the dry insulation bus, and the output after will connecting is as the A phase leading-out terminal of △ winding;
The b lead-out terminal of B phase transformer is connected with the z lead-out terminal of C phase transformer by the dry insulation bus, and the output after will connecting is as the B phase leading-out terminal of △ winding;
The x lead-out terminal of A phase transformer is connected with the c lead-out terminal of C phase transformer by the dry insulation bus, and the output after will connecting is as the C phase leading-out terminal of △ winding.
A, B, C three-phase 35kV lightning arrester are set before described dry insulation bus A, B, C three-phase leading-out terminal.
Described stacked dry type air-core reactor in parallel is meant: in A, B, C 3-phase dry type air-core reactor, have the closed assembly placement up and down of two-phase air-core reactor at least; And close layout of the neutral point of two-phase air-core reactor and directly connection.
B phase reactor is arranged in the front side, A phase reactor is arranged in rear side behind the reactor closed assembly mutually with C; And described A phase reactor leading-out terminal is arranged in the top, and C phase reactor leading-out terminal is arranged in the below, and the neutral point of two-phase directly links to each other in the centre.
With A, B, the closed assembly setting up and down of C three-phase reactor, between adjacent two-phase reactor, the reactor post insulator is set.
Described magnetic screen shunt reactor is meant: every phase reactor is formed by two sections, connects by starframe between the two sections of every phase reactor; And be equipped with high conducting magnet core inside and outside the line bag of every section reactor.
Described A, B, C three-phase reactor are " product " font or " one " font is arranged.
In described electric capacity duplexure, the A in the described series reactor, B, C three superimposed placements.
Adopt the utility model of technique scheme, adopted multiple measure to unite the structure of 500kV main transformer 35kV side is carried out compact design, thereby reduced floor space greatly, make a concrete analysis of as follows.
One, the △ bus adopts the dry insulation bus to finish the △ winding, the reliability height, and aspect electrical arrangement, isolated bus is arranged compact, attractive in appearance, and saving occupation of land effect is remarkable, and investment cost is higher than stay pipe maternal case, should actively use in engineering.
1, main transformer 35kV △ bus adopts the dry insulation bus, because isolated bus adopts the form of all insulation, its phase spacing is not limited by electric clear distance.Isolated bus is fixed by a plurality of fixedly gold utensils on the crossbeam, strengthens structural strength, and the bus spaced apart is 300mm, has realized the densification layout.
2, the dry insulation bus passes through fire resisting wall and arranges occupation of land in addition.Make longitudinal size compress 4.5m.One group of main transformer laterally takes up an area of size to be considered by 40m, can save to take up an area of about 180m
2
3, the dry insulation bus is all insulation structure, and the end leading-out terminal adopts the capacitor voltage equalizing structure, and the flashover probability is low, and probability of failure is extremely low.
4, open type bus porcelain vase is many, needs cleaning; Non-maintaining substantially after the dry insulation bus successful installation.
5, because the design of compact so dry insulation bus consumption is few, has been saved great amount of cost.
Two, owing to the dry-type air-core reactor closed assembly is put together, so can save floor space better.This technology and prior art compared obtain following table 1.
Table 1
As seen, from an interval angle, two folded flat reactor floor space minimums.We can find simultaneously, and longitudinal size is suitable with parallel capacitor device at interval for two folded one square of case, thereby the highest to the utilance in place, station district, and the effect of saving the area in practical engineering application is more obvious.
Three, owing to adopt magnetic screen formula shunt reactor, do not need antimagnetic distance, so can save floor space better.This technology and prior art compared obtain following table 2.
Table 2
As can be seen from Table 2, the utlity model has following advantage:
(1) closed assembly type dry type hollow shunt reactor and magnetic screen shunt reactor technical performance satisfy relevant criterion, have inherited the advantage of conventional dry-type air-core reactor, meet the power technology development trend of no oiling.
(2) the closed assembly type is done to resist with the magnetic screen reactor and has been realized the miniaturization of equipment and the densification of layout, has significantly reduced the main transformer low-pressure side and has arranged size, meets the fundamental state policy of " rationally utilize the soil, protect farmland conscientiously ".
(3) the closed assembly type is done to resist with the magnetic screen reactor and has all rationally been controlled equipment manufacturing cost and construction investment, and wherein the dried anti-economic performance of closed assembly type is suitable substantially with conventional scheme, and the magnetic screen reactor is done anti-a little more than routine, but resists far below oil.
Four,, thereby significantly reduced floor space with the three superimposed placements of the series reactor in the capacitor installation.
Description of drawings
Fig. 1 is the structural representation of 500kV main transformer 35kV side in the prior art.
Fig. 2 is the floor plan of the conventional bus of 35kV.
Fig. 3 is the structure chart that dry type air core shunt reactor arranged in available technology adopting " product " font.
Fig. 4 is the floor plan of Fig. 3.
Fig. 5 is the structure chart that dry type air core shunt reactor arranged in available technology adopting " " font.
Fig. 6 is the floor plan of Fig. 5.
Fig. 7 is the conventional layout plan of frame type capacitive device.
Fig. 8 is the floor plan of Fig. 7.
Fig. 9 is an overall structure schematic diagram of the present utility model.
Figure 10 finishes △ winding floor plan for adopting the dry insulation bus in the utility model.
Figure 11 finishes the sectional drawing of △ winding for adopting the dry insulation bus in the utility model.
Figure 12 is the phase sequence connection diagram of △ bus in the utility model.
Figure 13 is the structure chart that the stacked dry type of the utility model air-core reactor in parallel adopts " two folded one is flat " form.
Figure 14 is the structure chart that the stacked dry type of the utility model air-core reactor in parallel adopts " triple-lap " form.
Figure 15 is the structural representation that the utility model magnetic screen shunt reactor adopts " product " font.
Figure 16 is the floor plan of Figure 12.
Figure 17 is the structural representation that the utility model magnetic screen shunt reactor adopts " one " font.
Figure 18 is the floor plan of Figure 14.
Figure 19 is the structural representation of reactor line bag.
Figure 20 is the half sectional view of reactor line bag.
Figure 21 is the section layout plan of assembled shunt capacitor the complete sets of equipment in the utility model.
Figure 22 is the floor plan of assembled shunt capacitor the complete sets of equipment in the utility model.
Embodiment
As shown in Figure 9, the utility model comprises A, B, C three-phase transformer 1, and three-phase transformer 1 connects total loop 3 by △ bus 2, and total loop 3 connects 35kV bus 4,35kV bus 4 connects each duplexure 5, and above-mentioned duplexure comprises electric capacity duplexure 6 and reactance duplexure 7.Electric capacity duplexure 6 comprises Shunt Capacitor Unit 8 and the series reactor 9 that is connected with Shunt Capacitor Unit 8; Reactance duplexure 7 comprises three-phase reactor 10.For realizing compact design, the utility model adopts the dry insulation bus to finish the △ winding △ bus 2; In electric capacity duplexure 6, with the A in each Shunt Capacitor Unit, B, C three superimposed placements; In reactance duplexure 7, reactor 10 is stacked dry type air-core reactor in parallel or magnetic screen shunt reactor, below specifies respectively.
As Figure 10, shown in Figure 12, the △ bus adopts the dry insulation bus to finish the △ winding in the utility model.That is:
The a lead-out terminal of A phase transformer is connected with the y lead-out terminal of B phase transformer by the dry insulation bus, and the output after will connecting is as the A phase leading-out terminal of △ winding;
The b lead-out terminal of B phase transformer is connected with the z lead-out terminal of C phase transformer by the dry insulation bus, and the output after will connecting is as the B phase leading-out terminal of △ winding;
The x lead-out terminal of A phase transformer is connected with the c lead-out terminal of C phase transformer by the dry insulation bus, and the output after will connecting is as the C phase leading-out terminal of △ winding.
Before above-mentioned dry insulation bus A, B, C three-phase output end, connect A, B, C three-phase 35kv lightning arrester 11 respectively, as shown in figure 11.
Stacked dry type air-core reactor in parallel is meant in the present embodiment: in A, B, C 3-phase dry type air-core reactor, have the closed assembly placement up and down of two-phase air-core reactor at least; And the neutral point N of two-phase air-core reactor is near arranging and directly connecting.
As shown in figure 13, B phase reactor is arranged in the front side, A phase reactor is arranged in rear side behind the reactor closed assembly mutually with C; And above-mentioned A phase reactor leading-out terminal is arranged in the top, and C phase reactor leading-out terminal is arranged in the below, and the neutral point of two-phase directly links to each other in the centre.
In the present embodiment aforesaid way is referred to as " two folded one is flat " mode, reactor adopts low level to land arrangement, and two-phase closed assembly height 35/66kV is respectively 7/9 meter, and high-order the layout has following advantage on the support: at first, improve the device anti-seismic performance, improved the fail safe of structure; The second, improved the wiring condition of top reactor terminal, improve its electrical security; The 3rd, the whole height of reduction closed assembly scheme is convenient to install, is safeguarded and maintenance.
Secondly, three-phase reactor neutral point centralized arrangement is convenient to neutral point and is connected, to constitute the earth-free wiring of single star.In addition since with the neutral point of A phase reactor and C phase reactor after the centre directly links to each other, can reduce the height between the two-phase behind the closed assembly, thus the stability behind the enhancing closed assembly.
Once more, closed assembly AC phase reactor neutral point side is arranged together, between installing low-voltage insulator, reduced design difficulty, improved the fail safe of product operation.There is not the problem of phase insulation in one between the two-phase.Its two, by closed assembly phase insulation is set, improved the reactor radiating condition, improved radiating effect, simultaneously insulator is a non-conductor, does not generate heat in magnetic field.
Need to prove that B phase reactor high-pressure side outlet terminal proper extension connects the charged clear distance of lead apart from fence and reactor body to guarantee to draw.
As Figure 21, shown in Figure 22, in electric capacity duplexure 6 of the present utility model, comprise Shunt Capacitor Unit 8 and the series reactor 9 that is connected with Shunt Capacitor Unit 8, electric capacity post insulator 14 summation current transformers 15.
Arrange size for dwindling capacitor device, with A, B in each Shunt Capacitor Unit 8, C three superimposed placements, package unit only is made up of two capacitor towers like this, and each capacitor tower is respectively A, B, C three-phase capacitor from top to bottom.
For cooperating the lateral dimension of Shunt Capacitor Unit 8, series reactor 9 also adopts three-phase closed assembly scheme, is about to A, B, C three superimposed placements in the series reactor 9, by selecting suitable terminal to draw angle, guarantees the electrical distance of equipment room line then.Because Shunt Capacitor Unit 8 and series reactor 9 all adopt the mode of three-phase closed assembly, for reducing device height, Shunt Capacitor Unit 8 frameworks and series reactor 9 all adopt low level to arrange, fence is set all around.Be the handled easily earthed switch, earthed switch is placed on the fence outside.
In addition, the utility model has been cancelled discharge coil, for the structure optimization of shunt capacitor the complete sets of equipment creates favorable conditions.On the one hand, the large value capacitor group all adopts the higher current protection of sensitivity to replace voltage protection; On the other hand, cell capaciator inside is provided with discharge resistance, can in GB official hour 10min voltage drop be low to moderate 24V.Based on these 2 considerations, the cancellation discharge coil is feasible.
Present embodiment as different from Example 1, in the reactance duplexure 7 of present embodiment, as shown in figure 14, stacked dry type air-core reactor in parallel is meant: with A, B, the closed assembly setting up and down of C three-phase reactor, between adjacent two-phase reactor reactance post insulator 13 is set.
What present embodiment and embodiment 1, embodiment 2 were different is in the reactance duplexure 7 of present embodiment, to adopt magnetic screen formula shunt reactor.
As Figure 15--shown in 18, present embodiment comprises the reactor that A, B, C parallel three phase connect, and above-mentioned every phase reactor is formed by two sections, connects by starframe 12 between the two sections of every phase reactor; And be equipped with high conducting magnet core inside and outside the line bag 16 of every section reactor.
Need to prove, segment structure is basic identical up and down for every phase reactor, concentric structure for multilayer line bag formation, inside and outside be provided with in iron core 17 and outer iron core 18, the reactor magnetic resistance is reduced greatly, also reduce simultaneously the magnetic field of space outerpace greatly, play the effect of magnetic screen, as Figure 19, shown in Figure 20.
The magnetic screen reactor mainly contains following technical characterstic:
(1) high magnetic conduction shielding cylinder: the topmost characteristics of magnetic screen reactor are the high magnetic conduction shielding cylinders of the inside and outside installing of online bag, and inside and outside radome is to become drum type brake by the lamination closed assembly, after tightly wrapping with the glass filament bundle that soaks into epoxy resin and line bag integrally curing form.
The first, because existence unshakable in one's determination is arranged, the magnetic resistance of reactor is littler, and for given reactance value, the required number of turn of reactor is relatively less, thereby the reactor bulk volume is littler. The second, owing to high magnetic conductivity unshakable in one's determination, magnetic flux is most of to greatly reduce the leakage field in the peripheral air through formation unshakable in one's determination closed-loop path, thereby can reduce equipment room and arrange size. Based on above-mentioned two reasons, than conventional dry-type air-core reactor, magnetic screen reactor floor space can significantly reduce.
(2) two-part general structure: at first, single-phase reactor is divided into two sections, can make separately, is convenient to the coiling of coil, and workmanship is reliable and stable; The second, the two-part structure leaves intersegmental air flue, and radiating condition is good, and Temperature Distribution is more even, can prevent hot-spot; The 3rd, the two-part structure can increase device height, reduces line bag outer surface voltage gradient, is conducive to stop the creeping discharge phenomenon; At last, by adjusting the two sections structure pitch, the whole reactance value of adjustable reactance device makes it more accurate.
Cloth at the magnetic screen shunt reactor is set up, and can adopt " product " font to arrange, perhaps " one " font is arranged.
Claims (9)
1. compact 500kV main transformer 35kV side structure, it comprises A, B, C three-phase transformer (1), three-phase transformer (1) connects total loop (3) by △ bus (2), total loop (3) connects 35kV bus (4), 35kV bus (4) connects each duplexure (5), and described duplexure comprises electric capacity duplexure (6) and reactance duplexure (7); Described electric capacity duplexure (6) comprises Shunt Capacitor Unit (8) and the series reactor (9) that is connected with Shunt Capacitor Unit (8); Described reactance duplexure (7) comprises three-phase reactor (10), it is characterized in that: described △ bus (2) adopts the dry insulation bus to finish the △ winding; In described electric capacity duplexure (6), with the A in each Shunt Capacitor Unit, B, C three superimposed placements; In described reactance duplexure (7), described reactor (10) is stacked dry type air-core reactor in parallel or magnetic screen shunt reactor.
2. compact 500kV main transformer 35kV side structure according to claim 1 is characterized in that, described △ bus (2) adopts the dry insulation bus to finish the △ winding and is meant:
The a lead-out terminal of A phase transformer is connected with the y lead-out terminal of B phase transformer by the dry insulation bus, and the output after will connecting is as the A phase leading-out terminal of △ winding;
The b lead-out terminal of B phase transformer is connected with the z lead-out terminal of C phase transformer by the dry insulation bus, and the output after will connecting is as the B phase leading-out terminal of △ winding;
The x lead-out terminal of A phase transformer is connected with the c lead-out terminal of C phase transformer by the dry insulation bus, and the output after will connecting is as the C phase leading-out terminal of △ winding.
3. compact 500kV main transformer 35kV side structure according to claim 2 is characterized in that: A, B, C three-phase 35kV lightning arrester (11) are set before described dry insulation bus A, B, C three-phase leading-out terminal.
4. compact 500kV main transformer 35kV side structure according to claim 1 is characterized in that: described stacked dry type air-core reactor in parallel is meant: in A, B, C 3-phase dry type air-core reactor, have the closed assembly placement up and down of two-phase air-core reactor at least; And close layout of the neutral point of two-phase air-core reactor (N) and directly connection.
5. compact 500kV main transformer 35kV side structure according to claim 4 is characterized in that: B phase reactor is arranged in the front side, A phase reactor is arranged in rear side behind the reactor closed assembly mutually with C; And described A phase reactor leading-out terminal is arranged in the top, and C phase reactor leading-out terminal is arranged in the below, and the neutral point of two-phase directly links to each other in the centre.
6. compact 500kV main transformer 35kV side structure according to claim 4 is characterized in that: with A, B, the closed assembly setting up and down of C three-phase reactor, reactor post insulator (13) is set between adjacent two-phase reactor.
7. compact 500kV main transformer 35kV side structure according to claim 1, it is characterized in that: described magnetic screen shunt reactor is meant: every phase reactor is formed by two sections, connects by starframe (12) between the two sections of every phase reactor; And be equipped with high conducting magnet core inside and outside the line bag (16) of every section reactor.
8. compact 500kV main transformer 35kV side structure according to claim 7 is characterized in that: described A, B, C three-phase reactor are " product " font or " one " font is arranged.
9. compact 500kV main transformer 35kV side structure according to claim 1 is characterized in that: in described electric capacity duplexure (6), and A, the B in the described series reactor (9), C three superimposed placements.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206551791U CN201877702U (en) | 2010-12-13 | 2010-12-13 | Compact 500kV main transformer 35kV side structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206551791U CN201877702U (en) | 2010-12-13 | 2010-12-13 | Compact 500kV main transformer 35kV side structure |
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| CN201877702U true CN201877702U (en) | 2011-06-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570330A (en) * | 2010-12-13 | 2012-07-11 | 河南省电力勘测设计院 | Compact 35kv side structure of 500kv main transformer |
| CN103166144A (en) * | 2011-12-14 | 2013-06-19 | 河南省电力勘测设计院 | Mixed type power distribution unit of gas insulated switchgear (GIS) and hybrid gas insulated switchgear (H-GIS) |
| CN103715615A (en) * | 2013-12-26 | 2014-04-09 | 中国能源建设集团安徽省电力设计院 | Three-phase insulation rod applied to transformer substation and application thereof |
-
2010
- 2010-12-13 CN CN2010206551791U patent/CN201877702U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570330A (en) * | 2010-12-13 | 2012-07-11 | 河南省电力勘测设计院 | Compact 35kv side structure of 500kv main transformer |
| CN103166144A (en) * | 2011-12-14 | 2013-06-19 | 河南省电力勘测设计院 | Mixed type power distribution unit of gas insulated switchgear (GIS) and hybrid gas insulated switchgear (H-GIS) |
| CN103166144B (en) * | 2011-12-14 | 2016-04-06 | 河南省电力勘测设计院 | The mixed type power distribution equipment of a kind of GIS and H-GIS |
| CN103715615A (en) * | 2013-12-26 | 2014-04-09 | 中国能源建设集团安徽省电力设计院 | Three-phase insulation rod applied to transformer substation and application thereof |
| CN103715615B (en) * | 2013-12-26 | 2016-07-06 | 中国能源建设集团安徽省电力设计院有限公司 | It is applied in the three-phase insulation rod in transformer station and adopts the transformer station of this insulating bar |
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