CN1176512A

CN1176512A - Gas insulation tube

Info

Publication number: CN1176512A
Application number: CN97117595A
Authority: CN
Inventors: 山田均; 佐佐木润
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 1996-09-05
Filing date: 1997-09-04
Publication date: 1998-03-18
Anticipated expiration: 2017-09-04
Also published as: CN1071503C; KR19980024320A; JPH1080023A

Abstract

The purpose of the invention is to reduce the site area of a power station by reducing the length of an isolated phase bus extending from a three-phase integrated bus to a counter main bus side. Therefor in a gas insulated switchgear comprising air insulation bushings of each phase arranged in a shape of an isosceles triangle, through-type current transformers, of each phase, transformers for instruments of each phase, a main bus-bar, line units, three-phase integrated buses, isolated phase gas insulated buses of each phase, etc., the through-type current transformers are installed immediately below the bushings, and the transformers for instruments are horizontally installed in a projected manner toward an end part on the main bus-bar side of the gas insulated bus-bars C.

Description

Gas-insulated switchgear device

The present invention relates to gas-insulated switchgear device, especially in the transmission of electricity converting equipment, adopt the air insulation sleeve pipe and be applicable to the gas-insulated switchgear device that the power supply metering is arranged on the distribution substation near the sleeve pipe the gas insulated bus with voltage current transformer.

Be arranged on the power supply metering voltage current transformer in the gas-insulated switchgear device, generally constitute with voltage transformer by breakthrough form current transformer and metering.In recent years, along with the transmission system between Utilities Electric Co. interconnects, can between Utilities Electric Co., carry out the transaction of electric power, but at this moment with direct coupled distribution substation of the distribution substation of other Utilities Electric Co.s in power supply metering voltage current transformer must be set near its sleeve pipe.General structure by the gas-insulated switchgear device in this distribution substation of present inventor's proposition is shown in Fig. 7 and Fig. 8 recently.

Fig. 7 is a plane graph, and Fig. 8 is the C-C line end view of Fig. 7.In these two figure, the 1st, the anchor steel construction corresponding with overhead transmission line, 2A～2C, 3A～3C are each air insulation sleeve pipes in mutually, respectively by

sleeve pipe

2B, 3B with middle phase be the summit, the isosceles triangle that is the base with

sleeve pipe

2A, 2C and 3A, the 3C of other 2 phases is configured.4A～4C, 5A～5C are that breakthrough form current transformer, 6A～6C, the 7A～7C of each phase is the metering voltage transformer of each phase, are made of the power supply metering voltage current transformer of each phase these two parts.8A～8C, 9A～9C are the lightning arresters of each phase, the 22nd, be used for the metering voltage transformer of circuit.The 10th, main bus bar, 12A, 12B are the line units that is connected with

main bus bar

10, and 13A, 13B are the three-phase summarizing bus that is connected with main bus bar 10 by

line unit

12A, 12B, respectively along the longitudinal extension of main bus bar 10.Gas insulated bus 14A～14C after each phase phase-splitting, 15A～15C respectively with this three-

phase summarizing bus

13A, 13B connects, but these gas insulated bus 14A～14C, 15A～15C and three-

phase summarizing bus

13A, 13B extends to deviating from main bus bar one side with roughly meeting at right angles, and, on these buses, from the end (left end the figure) that deviates from main bus bar one side, disposing above-mentioned lightning arrester 8A～8C successively by the following stated order, 9A～9C, sleeve pipe 2A～2C, 3A～3C, metering voltage transformer 6A～6C, 7A～7C, and breakthrough form current transformer 4A～4C, 5A～5C.

In addition, known have with each ferrule configuration with the straight line of vertical almost parallel of main bus bar on distribution substations such as electric substation.The general structure of the existing gas-insulated switchgear device of this distribution substation is shown in the plane graph of Fig. 9.

In Fig. 9, the 10th, main bus bar, 11A, 11B are the voltage transformer unit, 12A～12F is a line unit, 16A～16F is that single-phase bus unit, 17A～17F are tube units, the 18th, boosting unit, each tube unit 17A～17F respectively by the gas insulated bus 19A～19C after each phase phase-splitting, be arranged on each phase sleeve pipe 20A～20C on this gas insulated bus 19A～19C, and lightning arrester 21A～21C constitute.

In Fig. 7 and gas-insulated switchgear device shown in Figure 8, play the part of three-phase summarizing bus side and the power supply that is made of with voltage transformer 6A～6C, 7A～7C breakthrough form current transformer 4A～4C, 5A～5C and metering is being set measures and use voltage current transformer owing on gas insulated bus 14A～14C, 15A～15C after each phase phase-splitting, the position is set, so on gas insulated bus 14A～14C, 15A～15C, must be useful on the bus part that these equipment are set from sleeve pipe 2A～2C, 3A～3C.Especially, as shown in Figure 7, with each ferrule configuration or with in when being the isosceles triangle on summit mutually, gas insulated

bus

14A, 14C that draws to the three-phase summarizing bus side from the sleeve pipe 2A, the 2C that are positioned at the isosceles triangle base side and 3A, 3C and the length of 15A, 15C will extend with voltage current transformer because of the power supply metering is set, this will make the floor space of whole distribution substation increase, thereby its economy has just become problem.In addition, for the power supply metering is carried out periodic verification with voltage current transformer, all breakthrough form current transformer and metering must be pulled down with voltage transformer at every turn, but because of wherein metering with voltage transformer be arranged on gas insulated bus under, so it temporarily must be moved to the side of gas insulated bus, sling with crane etc. then, thereby the problem of field-strip trouble when existing calibrating.

In addition, in gas-insulated switchgear device shown in Figure 9, because between each phase of sleeve pipe is air-insulated, so its phase spacing is greater than the phase spacing of the line unit of main bus bar side, therefore, increase as unit number, the length with main bus bar of then must taking measures is lengthened to and is connection line unit etc. more than the necessary length.Phase spacing for sleeve pipe, owing to be air insulation, even so also be difficult to from now on shorten, but phase spacing for line unit of main bus bar side etc., because technological innovation and existing the possibility of shortening from now on, the missionary society that can expect both is increasing, therefore, aforesaid taking measures will further increase the necessity that main bus bar length is lengthened to more than the Len req, and this will be uneconomic.In addition, in the tube unit 17A, the 17B that are connected with the both ends side of

main bus bar

10,17E, 17F, gas insulated bus 19A～the 19C of each phase, the part of its single-phase bus cell side is extended obliquely with respect to main bus bar on the extended line of single-phase bus unit, its lightning arrester side part is then extended with respect to main bus bar with meeting at right angles, so two parts are crooked mutually, and its crooked angle difference in each phase.That is, with tube unit that the both ends side of main bus bar 10 is connected in, the structure of each phase is different, does not do any consideration for its standardization.

Therefore, the objective of the invention is to, provide a kind of can making to deviate from the contraction in length of the isolated phase bus that main bus bar one side extends thereby can dwindle the gas-insulated switchgear device of distribution substation's floor space from the three-phase summarizing bus side direction.

Another object of the present invention is to, provide a kind of and can when the power supply metering is examined and determine with voltage current transformer, make the field-strip improved gas-insulated switchgear device of metering with voltage transformer.

Another object of the present invention is to, provide a kind of and need not to make main bus bar to prolong the gas insulating switch device that the gas insulated bushing that can will be positioned at end side is connected in the economy of main bus bar.

Another object of the present invention is to, a kind of standardized gas-insulated switchgear device of each phase structure that can make tube unit is provided.

For solving above-mentioned problem, the invention is characterized in: will be located at three-phase summarizing bus and be configured in the below of sleeve pipe to the power supply metering that deviates from the isolated phase bus that main bus bar one side extends with the breakthrough form current transformer of voltage current transformer with roughly meeting at right angles, and will be equivalent to for the necessary bus part of breakthrough form current transformer is set from the contraction in length of three-phase summarizing bus to the isolated phase bus that deviates from the extension of main bus bar one side.

Feature of the present invention also is: at least a portion of voltage transformer is used in the metering of will powering with the metering of voltage current transformer, particularly each phase sleeve pipe is configured to in be located at metering voltage transformer on the short isolated phase bus of length when being the isosceles triangle on summit mutually, with the state that stretches out to the main bus bar side from three-phase summarizing bus, particularly flatly be configured in the end by main bus bar one side of isolated phase bus, and will be equivalent to for the metering necessary bus part of voltage transformer is set from the contraction in length of three-phase summarizing bus to the isolated phase bus that deviates from the extension of main bus bar one side, in addition, can will measure with crane etc. in when calibrating and directly pull down with voltage transformer.

Feature of the present invention also is: the metering of will powering is configured in the below of sleeve pipe with the breakthrough form current transformer of voltage current transformer, to measure the end that particularly flatly is configured in isolated phase bus with at least a portion of voltage transformer with the state that stretches out to the main bus bar side from three-phase summarizing bus simultaneously by main bus bar one side, and will be equivalent to for breakthrough form current transformer and the metering necessary bus part of voltage transformer are set from the contraction in length of three-phase summarizing bus to the isolated phase bus that deviates from the extension of main bus bar one side, in addition, can will measure with crane etc. in when calibrating and directly pull down with voltage transformer.

Feature of the present invention also is: adopt along the three-phase summarizing bus of the main bus bar longitudinal extension bus wire portion as the line unit that is connected with the tube unit that is positioned at the main bus bar end side, just the tube unit that is positioned at the main bus bar end side can be connected with main bus bar by this three-phase summarizing bus.

Feature of the present invention also is: make the isolated phase bus of each phase of tube unit linearly, and sleeve pipe and lightning arrester are arranged on this isolated phase bus, make each phase structure of tube unit identical.

Fig. 1 is the plane graph of the gas-insulated switchgear device of expression one embodiment of the invention.

Fig. 2 is the A-A line end view of Fig. 1.

Fig. 3 is the plane graph of the gas-insulated switchgear device of expression another embodiment of the present invention.

Fig. 4 is the plane graph of the gas-insulated switchgear device of expression another embodiment of the present invention.

Fig. 5 is the B-B line end view of Fig. 4.

Fig. 6 is the plane graph of the gas-insulated switchgear device of expression another embodiment of the present invention.

Fig. 7 is the plane graph of the nearest gas-insulated switchgear device that proposes.

Fig. 8 is the C-C line end view of Fig. 7.

Fig. 9 is the plane graph of existing gas-insulated switchgear device.

Below, with reference to the description of drawings various embodiments of the present invention.

Fig. 1 and Fig. 2 are plane graph of gas-insulated switchgear device of expression one embodiment of the invention and the A-A line end view of Fig. 1.In these two figure, the 1st, the anchor steel construction corresponding with overhead transmission line is the anchor structure of two line sharings.2A～2C, 3A～3C are each gas insulated bushings in mutually, are the summit, are that base (2A, 2C) is configured to isosceles triangle, and is summit and by main bus bar 10 1 sides, be configured to isosceles triangle to deviate from main bus bar one side as base (3A, 3C) with the sleeve pipe 3B of middle phase with main bus bar 10 1 sides by the sleeve pipe 2B with middle phase respectively.4A～4C, 5A～5C are that breakthrough form current transformer, 6A～6C, the 7A～7C of each phase is the metering voltage transformer of each phase, are made of the power supply metering unsteady flow voltage transformer of each phase these two equipment.8A～8C, 9A～9C are the lightning arresters of each phase, the 22nd, be used for the metering voltage transformer of circuit.The 10th, main bus bar, 12A, 12B are line units, 13A, 13B are the three-phase summarizing bus that is connected with main bus bar 10 by

line unit

12A, 12B, respectively along the longitudinal extension of main bus bar 10.Gas insulated bus 14A～14C, 15A～15C after each phase phase-splitting is connected with this three-

phase summarizing bus

13A, 13B respectively, but these gas insulated bus and three-

phase summarizing bus

13A, 13B extend to deviating from main bus bar one side with roughly meeting at right angles, and, on these buses, disposing above-mentioned sleeve pipe 2A～2C, 3A～3C, breakthrough form current transformer 4A～4C, 5A～5C, metering voltage transformer 6A～6C, 7A～7C respectively, reaching lightning arrester 8A～8C, 9A～9C.In these equipment, except that being configured in length short gas insulated

bus

14A, 14C, metering on the 15B with

voltage transformer

6A, 6C, the 7B, the configuration of other equipment and Fig. 7 and shown in Figure 8 identical.Above-mentioned metering with

voltage transformer

6A, 6C, 7B with the status level of stretching out to the main bus bar side from three-

phase summarizing bus

13A, 13B be configured in the end of gas insulated

bus

14A, 14C, 15B by main bus bar one side.

Therefore, as according to present embodiment, on the length that deviates from the extension of main bus bar one side short gas insulated

bus

14A, 14C, 15B, do not needing to be used to be provided with the bus part of metering from three-

phase summarizing bus

13A, 13B with

voltage transformer

6A, 6C, 7B, so the length of gas insulated

bus

14A, 14C, 15B correspondingly can be shortened this part, thereby the floor space of whole distribution substation is dwindled.In addition and since metering with

voltage transformer

6A, 6C, 7B with the state configuration of stretching out from three-phase summarizing bus in the end by main bus bar one side of gas insulated bus, so when examining and determine, can directly pull down, thereby its operation is improved with crane etc.

Fig. 3 is the plane graph of the gas-insulated switchgear device of another embodiment of the present invention.Anchor steel construction 1 is an independently anchor structure of each circuit.Sleeve pipe 2A～2C, the 3A～3C of each phase is the summit, is that the base is configured to isosceles triangle with main bus bar side (2A, 2C and 3A, 3C) by

sleeve pipe

2B, 3B with middle phase.Therefore, the short gas insulated bus of length becomes 14A, 14C and 15A, 15C, be configured in metering on these buses with

voltage transformer

6A, 6C and 7A, 7C, be configured in the end of leaning on main bus bar one side of gas insulated bus with the status level ground that stretches out from three-phase summarizing bus.Other structures are identical with above-mentioned example.Also can obtain the action effect same in the present embodiment with the foregoing description.

Fig. 4 and Fig. 5 are plane graph of gas-insulated switchgear device of expression another embodiment of the present invention and the B-B line end view of Fig. 4.In this example, under the breakthrough form current transformer 4A～4C of each phase, sleeve pipe 2A～2C, 3A～3C that 5A～5C is configured in each phase.Other structures are identical with the embodiment of above-mentioned Fig. 1 and Fig. 2.Therefore, as according to present embodiment, then can acquisition and Fig. 1 and the same action effect of Fig. 2 example, again because of on gas insulated bus 14A～14C, the 15A～15C of each phase, not needing to be used to be provided with the bus part of breakthrough form current transformer 4A～4C, 5A～5C, so can be further the length of gas insulated bus be correspondingly shortened this part, thereby the floor space of whole distribution substation is further dwindled.

In addition, in the various embodiments described above, (in the embodiment of Fig. 1 and Fig. 2 or Fig. 4 and Fig. 5 is 14B to the long gas insulated bus of length, 15A, 15C, be 14B in the embodiments of figure 3,15B), because (embodiment at Fig. 1 and Fig. 2 or Fig. 4 and Fig. 5 is 6B with voltage transformer to have enough being used for that metering is set, 7A, 7C, in the example of Fig. 3 6B, bus part 7B), so with these meterings with voltage transformer be configured in gas insulated bus under, but also can with these meterings with voltage transformer with the status level of stretching out from three-phase summarizing bus be configured in the end of leaning on main bus bar one side of gas insulated bus.As adopt this mode, whole meterings are improved with the field-strip of voltage transformer.

In addition, in above-mentioned each example, applicable cases when each phase sleeve pipe disposed by equilateral triangle has been described, but has the invention is not restricted to this, for each phase sleeve pipe for example can be suitable for too with the situations such as the linearly configuration of mode with vertical almost parallel of main bus bar.

Fig. 6 is the plane graph of the gas-insulated switchgear device of expression another embodiment of the present invention.Present embodiment is corresponding to existing gas-insulated switchgear device shown in Figure 9.In the present embodiment, replace existing single-

phase bus unit

16A, 16F, the line unit 12A that employing is connected with main bus bar 10 as the tube unit 17A, the 17F that are used for being positioned at two ends along three-phase summarizing bus 13A, the 13B of the longitudinal extension of main bus bar 10, the bus wire portion of 12F, each of tube unit 17A, the 17F that connects with this three-

phase summarizing bus

13A, 13B be the gas insulated bus 19A～19C after the phase-splitting mutually, extends towards deviating from main bus bar one side with three-

phase summarizing bus

13A, 13B with roughly meeting at right angles.In addition, be positioned at the gas insulated bus 19A～19C after each phase phase-splitting of

tube unit

17B, 17E of an inboard separately from two ends, linearly extension on the extended line of connected single-phase bus unit 16B, 16E.Promptly, the whole linearly extensions of gas insulated bus 19A～19C after each phase phase-splitting of tube unit 17A～17F, each phase structure of the tube unit 17A～17F that is constituted behind sleeve pipe 20A～20C that each phase is set on each bus and lightning arrester 21A～21C is identical.Though and particularly not shown in the drawings, the metering that is used for each phase circuit be configured in voltage transformer each phase sleeve pipe under.Other structures are identical with existing gas-insulated switchgear device shown in Figure 9.

As according to present embodiment, then since the tube unit that will be positioned at end side by three-phase summarizing bus along the longitudinal extension of main bus bar be connected with main bus bar, so, need not that main bus bar is prolonged the tube unit that can will be positioned at end side and be connected, thereby be extremely economical with main bus bar.In addition, because each phase structure of tube unit is identical, so can make its standardization.

According to the present invention described above, since will be located at three-phase summarizing bus roughly meet at right angles to deviating from power supply metering on the isolated phase bus that main bus bar one side extends is configured in sleeve pipe with the breakthrough form current transformer of voltage current transformer below, so the contraction in length that deviates from the isolated phase bus that main bus bar one side extends from the three-phase summarizing bus side direction can be equivalent to for the necessary bus part of breakthrough form current transformer is set, thereby the floor space that can dwindle whole distribution substation.

In addition, at least a portion of voltage transformer is used in metering with the metering of voltage current transformer owing to will power, particularly when with ferrule configuration Cheng Yizhong being the isosceles triangle on summit mutually, be located at the metering voltage transformer on the short isolated phase bus of length, with the state that stretches out to the main bus bar side from three-phase summarizing bus, particularly flatly be configured in the end by main bus bar one side of isolated phase bus, so the contraction in length that deviates from the isolated phase bus of main bus bar one side extension from the three-phase summarizing bus side direction can be equivalent to for the metering necessary bus part of voltage transformer is set, in addition, can will measure with voltage transformer with crane etc. in when calibrating and directly to pull down, thereby the floor space that can dwindle whole distribution substation, metering is improved with the field-strip of voltage transformer.

In addition, metering will be configured in the below of sleeve pipe with the breakthrough form current transformer of voltage current transformer owing to will power, to measure the end that particularly flatly is configured in isolated phase bus with at least a portion of voltage transformer with the state that stretches out to the main bus bar side from three-phase summarizing bus simultaneously by main bus bar one side, so can will be equivalent to for breakthrough form current transformer and the metering necessary bus part of voltage transformer are set from the contraction in length of three-phase summarizing bus to the isolated phase bus that deviates from the extension of main bus bar one side, in addition, can will measure with voltage transformer with crane etc. in when calibrating and directly to pull down, thereby the floor space that can dwindle whole distribution substation, metering is improved with the field-strip of voltage transformer.

In addition, also owing to can adopt along the three-phase summarizing bus of the longitudinal extension of main bus bar bus wire portion as the line unit that is connected with the tube unit that is positioned at the main bus bar end side, so especially need not main bus bar is prolonged and can be connected with main bus bar by the tube unit that this three-phase summarizing bus will be positioned at end side, thereby be economy extremely.

And then, also owing to the isolated phase bus of each phase that makes tube unit is linearly, and sleeve pipe and lightning arrester are arranged on this isolated phase bus, make each phase structure of tube unit identical, so can make its standardization.

Claims

1. gas-insulated switchgear device, it has: main bus bar, be connected with this main bus bar by line unit, and three-phase summarizing bus along the longitudinal extension of main bus bar, be connected with this three-phase summarizing bus, and with respect to three-phase summarizing bus roughly meet at right angles to the isolated phase bus that deviates from each phase that main bus bar one side extends, be located at the gas insulated bushing of each phase of the end that deviates from main bus bar one side of the isolated phase bus of this each phase, and be located at and use voltage current transformer by breakthrough form current transformer and metering with the power supply metering that voltage transformer constitutes on the isolated phase bus of above-mentioned each phase, this gas-insulated switchgear device is characterised in that: above-mentioned power supply is measured the below that is configured in above-mentioned sleeve pipe with the breakthrough form current transformer of voltage current transformer.

2. gas-insulated switchgear device, it has: main bus bar, be connected with this main bus bar by line unit, and three-phase summarizing bus along the longitudinal extension of main bus bar, be connected with this three-phase summarizing bus, and with respect to three-phase summarizing bus meet at right angles substantially to the isolated phase bus that deviates from each phase that main bus bar one side extends, be located at the gas insulated bushing of each phase of the end that deviates from main bus bar one side of the isolated phase bus of this each phase, and be located at and use voltage current transformer by breakthrough form current transformer and metering with the power supply metering that voltage transformer constitutes on the isolated phase bus of above-mentioned each phase, this gas-insulated switchgear device is characterised in that: with above-mentioned power supply metering with the metering of voltage current transformer with at least a portion of voltage transformer with the state configuration of stretching out to the main bus bar side the end of leaning on main bus bar one side at above-mentioned isolated phase bus from above-mentioned three-phase summarizing bus.

3. gas-insulated switchgear device, it has: main bus bar, be connected with this main bus bar by line unit, and three-phase summarizing bus along the longitudinal extension of main bus bar, be connected with this three-phase summarizing bus, and with respect to three-phase summarizing bus meet at right angles substantially to the isolated phase bus that deviates from each phase that main bus bar one side extends, be located at the gas insulated bushing of each phase of the end that deviates from main bus bar one side of the isolated phase bus of this each phase, and be located at the power supply metering voltage current transformer that constitutes with voltage transformer by breakthrough form current transformer and metering on the isolated phase bus of above-mentioned each phase, this gas-insulated switchgear device is characterised in that: above-mentioned power supply metering is configured in the below of above-mentioned sleeve pipe with the breakthrough form current transformer of voltage current transformer, and with above-mentioned power supply metering with the metering of voltage current transformer with at least a portion of voltage transformer with the state configuration of stretching out to the main bus bar side the end of leaning on main bus bar one side at above-mentioned isolated phase bus from above-mentioned three-phase summarizing bus.

4. according to any one described gas-insulated switchgear devices of claim 2 and 3, it is characterized in that: with the ferrule configuration of above-mentioned each phase become by with in be the isosceles triangle on summit mutually, and will be located at above-mentioned metering on the short isolated phase bus of length in the isolated phase bus of each phase with voltage transformer with the state configuration of stretching out to the main bus bar side the end of leaning on main bus bar one side at above-mentioned isolated phase bus from above-mentioned three-phase summarizing bus.

5. according to any one the described gas-insulated switchgear device in the claim 2～4, it is characterized in that: the above-mentioned metering voltage transformer horizontal arrangement that will be configured in the end of leaning on the main bus bar side of above-mentioned isolated phase bus.

6. gas-insulated switchgear device, it has: main bus bar; And connect with this main bus bar and be provided with the tube unit that each isolated phase bus mutually of lightning arrester constitutes by sleeve pipe with deviating from main bus bar one side by line unit, it is characterized in that: the bus wire portion that adopts the line unit that is connected with the tube unit that is positioned at above-mentioned main bus bar end side along the three-phase summarizing bus conduct of the longitudinal extension of above-mentioned main bus bar.

7. gas-insulated switchgear device according to claim 6, it is characterized in that: with vertical almost parallel ground alignment arrangements of above-mentioned sleeve pipe and main bus bar, and make the isolated phase bus of each phase of above-mentioned tube unit linearly, and above-mentioned sleeve pipe and above-mentioned lightning arrester are arranged on this isolated phase bus.