CN203813222U - Two-input two-output PT2 power distribution station with subsections - Google Patents

Two-input two-output PT2 power distribution station with subsections Download PDF

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Publication number
CN203813222U
CN203813222U CN201420149736.0U CN201420149736U CN203813222U CN 203813222 U CN203813222 U CN 203813222U CN 201420149736 U CN201420149736 U CN 201420149736U CN 203813222 U CN203813222 U CN 203813222U
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switch
power distribution
bus
distribution station
strip
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Inventor
游兆阳
谢邦鹏
孙阳盛
王何舟
于盛楠
徐静芝
汪洋
袁浩悦
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State Grid Shanghai Electric Power Co Ltd
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State Grid Shanghai Electric Power Co Ltd
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Abstract

The utility model provides a two-input two-output PT2 power distribution station with subsections. Two paths of 10kV inlet wires are respectively communicated with a 10kV first section bus and a 10kV second section bus, and are respectively communicated with a No.1 transformer and a No.2 transformer through respective SF6 load knife switches, and supply power to a 0.4kV first section bus and a plurality of outlet wires thereof, and a 0.4kV second section bus and a plurality of outlet wires thereof. The 0.4kV first section bus and the plurality of outlet wires thereof, and the 0.4kV second section bus and the plurality of outlet wires thereof are connected with corresponding transformers through corresponding 0.4kV inlet switches; the 10kV first section bus is connected to the 10kV second section bus through a 10kV section switch; and the 0.4kV first section bus is connected to the 0.4kV second section bus through a 0.4kV section switch. The SF6 load knife switches are arranged in an SF6 ring network cabinet, and the 0.4 kV inlet switches are arranged in a GGD cabinet. According to the utility model, primary equipment of the power distribution station is replaced on the premise of not changing the original scale and the main wire connecting mode.

Description

A kind of two enter the PT2 type power distribution station of scene 2 band segmentation
Technical field
The utility model relates to power distribution field, and particularly a kind of two enter the PT2 type power distribution station of scene 2 band segmentation.
Background technology
To shopping centre and residential building when power supply, user generally requires higher to power supply reliability.Some power distribution stations that put into operation in the nineties, main electrical scheme adopts two to enter the mode of scene 2 band segmentation.
As shown in Figure 1, a road 10kV inlet wire is connected to transformer No. 1 through switch S 1, switch S 11, and another road 10kV inlet wire is connected to transformer No. 2 through switch S 2, switch S 21, and mono-section, two sections buses of 10kV connect by two block switch S3 and lead-in wire.The 10kV inlet wire side of mono-, two sections of bus places of 10kV and No. 1, No. 2 transformer is respectively arranged with lightning arrester.Afterwards, No. 1 transformer is powered for the mono-section of bus of 0.4kV and six outlets thereof that are attached thereto by switch S 14, and No. 2 transformers are that bis-sections of buses of 0.4kV and six outlets thereof that are attached thereto by switch S 24 are powered; Mono-section, two sections buses of 0.4kV connect by block switch S31 and lead-in wire; No. 1, No. 2 0.4kV capacitors are connected to respectively mono-section of 0.4kV, two sections of buses by capacitor switch separately.
Fig. 2 is the floor plan of existing power distribution station, establishes two low voltage incoming line cabinets 1, six low-pressure line-outgoing cabinets 2, two capacitor box 3 and a low pressure segmentation cabinet 4 and place the relevant device of 0.4kV side in low-pressure chamber.In hyperbaric chamber, place four high-voltage boards 6, place the related device of above-mentioned 10kV side.No. 1 and No. 2 transformers connect corresponding high-voltage board 6 and low voltage incoming line cabinet 1 by some cables.
Yet, equipment outmoded (conventionally using the high-voltage board of GG1A type and the low-voltage cabinet of PGL) in above-mentioned existing power distribution station, without standby redundancy, power supply reliability is poor, is difficult to meet growing electricity consumption requirement.And power distribution station to the power supply of shopping centre and residential building is limited by often in place, be difficult to expansion scale, transformation difficulty is large.
Utility model content
The purpose of this utility model is to provide a kind of two and enters the PT2 type power distribution station of scene 2 band segmentation, not changing under the prerequisite of original scale and main wiring mode, power distribution station primary equipment is changed, to improve equipment power supply reliability.
In order to achieve the above object, the technical solution of the utility model is to provide a kind of two and enters the PT2 type power distribution station of scene 2 band segmentation, and it comprises:
One road 10kV inlet wire is communicated with mono-section of bus of 10kV, also by a set of SF6 load plug-in strip, is communicated with No. 1 transformer, and the mono-section of bus of 0.4kV and many outlets thereof that convert to after 0.4kV as being connected to by a set of 0.4kV service entrance switch after No. 1 transformer are powered;
Another road 10kV inlet wire is communicated with bis-sections of buses of 10kV, also by another set of SF6 load plug-in strip, is communicated with No. 2 transformers, and the bis-sections of buses of 0.4kV and many outlets thereof that convert to after 0.4kV as being connected to by another set of 0.4kV service entrance switch after No. 2 transformers are powered;
Between bis-sections of buses of mono-section of bus of described 10kV and 10kV, by 10kV block switch, be connected; Between bis-sections of buses of mono-section of bus of described 0.4kV and 0.4kV, by 0.4kV block switch, be connected.
Preferably, described SF6 load plug-in strip is arranged at SF6 ring main unit;
Described 0.4kV service entrance switch is arranged at GGD cabinet.
Preferably, one end of described SF6 load plug-in strip is connected with 10kV inlet wire by copper bus-bar, this SF6 load plug-in strip other end is by after fuse, current transformer minute two-way, leads up to capacity earth, and another road is connected to leading-out terminal and is connected to No. 1 or No. 2 transformers by outlet cable.
Preferably, one end of described SF6 load plug-in strip is connected with 10kV inlet wire by copper bus-bar, and this SF6 load plug-in strip other end is by Fen San road after current transformer, and two-way is connected to respectively electric capacity and the lightning arrester of ground connection, and another road is connected to leading-out terminal.
Preferably, the neutral ground form of No. 1, No. 2 transformer is direct ground connection; The 10kV side of No. 1, No. 2 transformer is installed respectively one group of lightning arrester.
Preferably, in each outlet of mono-section of bus of 0.4kV and bis-sections of buses of 0.4kV, be respectively equipped with outlet switch;
Two group capacitors, by corresponding capacitor switch, are connected to respectively mono-section of bus of described 0.4kV and bis-sections of buses of 0.4kV; Each 0.4kV service entrance switch, 0.4kV block switch, outlet switch, capacitor switch are all the vacuum circuit-breakers that are arranged at GGD cabinet.
Preferably, two groups of high-voltage boards that SF6 load plug-in strip is set are respectively positioned at hyperbaric chamber;
The low voltage incoming line cabinet of two relative set 0.4kV service entrance switchs, the low-pressure line-outgoing cabinet of six relative set outlet switchs, two capacitor panels, a low pressure segmentation cabinet that 0.4kV block switch is set are positioned at low-pressure chamber;
No. 1, No. 2 transformers, by corresponding line cable, access respectively the high-voltage board in hyperbaric chamber, and by the low voltage incoming line cabinet of low pressure copper busbar access low-pressure chamber.
Compared with prior art, the PT2 type power distribution station that the utility model provides, do not changing under the prerequisite of original scale and electrical wiring mode, power distribution station primary equipment is changed, SF6 load plug-in strip is set and is equipped with SF6 warning device, be conducive to improve the general level of the health and the safety operation level of equipment, the workload of reduce maintenance, safeguarding, improves power supply reliability.
Accompanying drawing explanation
Fig. 1 is the electrical wiring schematic diagram of existing power distribution station;
Fig. 2 is the floor plan of existing power distribution station;
Fig. 3 is 10kV electrical wiring schematic diagram in PT2 type power distribution station described in the utility model;
Fig. 4 is 0.4kV electrical wiring schematic diagram in PT2 type power distribution station described in the utility model;
Fig. 5 is the floor plan of the utility model power distribution station.
Embodiment
As shown in Figure 3,4, the utility model provides a kind of PT2 type power distribution station (PT2 type, with the looped network power distribution station of 2 transformers and 10kV outlet), and main electrical scheme still adopts two to enter the mode of scene 2 band segmentation, and 0.4kV wiring adopts single-trunk segmental wiring mode.That is, mono-section of bus of No. 1 transformer, 0.4kV that a road 10kV inlet wire is 10kV/0.4kV and six outlet power supplies thereof, bis-sections of buses of No. 2 transformers, 0.4kV that another road 10kV inlet wire is 10kV/0.4kV and six outlet power supplies thereof.Between mono-section, two sections buses of 10kV, by 10kV block switch and lead-in wire, connect; Between mono-section, two sections buses of 0.4kV, by 0.4kV block switch and lead-in wire, connect.
Two groups of 10kV high-voltage boards are positioned at hyperbaric chamber, adopt respectively SF6 load plug-in strip to be communicated with or disconnect corresponding 10kV inlet wire.In this example, above-mentioned 10kV high-voltage board adopts SF6 ring main unit as shown in Figure 3, wherein, there are two switch cubicles to use following device mode to arrange: wherein one end of SF6 load plug-in strip is connected with 10kV inlet wire by copper bus-bar, this SF6 load plug-in strip other end is leaded up to capacity earth after by fuse, current transformer, and another road is connected to leading-out terminal and further by outlet cable, is connected to No. 1 or No. 2 transformers; In each switch cubicle, be also provided with SF6 pressure indicator, capacitance voltage indicating device, display device for short circuit, three position switch auxiliary contact, gas pressure auxiliary contact, fuse auxiliary contact, etc.
Also having in four switch cubicles uses following another kind of device arrangements mode: SF6 to load plug-in strip by current transformer Hou Fen tri-tunnels, be connected to respectively electric capacity and the lightning arrester of leading-out terminal and ground connection, can connect corresponding transformer by leading-out terminal, or (the SF6 load plug-in strip of arranging such as above-mentioned front a kind of mode is as 10kV service entrance switch to be connected to meet different wiring needs from device in other switch cubicles, the SF6 load plug-in strip that rear a kind of mode is arranged is as connecting the switch of lightning arrester or the block switch on bus etc., cooperatively interact the connection plan shown in design of graphics 1 etc.).
Current period short circuit current level with reference to early stage equipment select, 10kV short circuit current level is pressed 20kA and is considered.Preferably the parameter of load plug-in strip is as follows: rated voltage 12 kV, rated current 630 A, nominal short-circuit capacity 346 MVA, specified drop-out current 20 kA, moving drop-out current peak value 50 kA, 4 seconds heat-stable current 20 kA of stablizing.
In addition, in conjunction with primary equipment transformation, corresponding line cable has been done to reconfiguration, all used flame retardant cable.For example, at 10kV side inlet wire, adopt ZA-YJV-8.7/10-3X70 cable, 10kV distribution transforming outlet adopts ZA-YJV-8.7/10-3X70 cable.Each position in storehouse primary equipment ground connection is used 5*40 band iron, and is connected with indoor ground connection main line.
No. 1 transformer and No. 2 transformers are two 10kV/0.4kV transformers, lay respectively at distribution transforming chamber No. 1, No. 2, and these two transformers are incited somebody to action respectively 10kV primary voltage separately and changed 0.4kV output into, and transformer neutral point ground connection form is direct ground connection.The 10kV inlet wire side of No. 1, No. 2 transformer is respectively installed one group of lightning arrester, plays lightning protection effect.
As shown in Figure 4, the switch of all 0.4kV sides all adopts the 0.4kV voltage switchgear that is positioned at 0.4kV switch gear room, and each switch all adopts vacuum circuit-breaker, can be communicated with or disconnect corresponding outlet or its power pack.In this power distribution station of the present utility model, be provided with altogether 2 0.4kV service entrance switchs, 12 outlet switchs, 2 capacitor switches, 1 0.4kV block switch.
That is, the 0.4kV low-pressure side of No. 1 transformer is connected to mono-section of bus of 0.4kV by 0.4kV service entrance switch Q14, current transformer, in 6 outlets dividing into, corresponding outlet switch Q15 and current transformer is set separately; The 0.4kV low-pressure side of No. 2 transformers is connected to bis-sections of buses of 0.4kV by 0.4kV service entrance switch Q24, current transformer, divides in other 6 outlets corresponding outlet switch Q25 and current transformer are set separately; Between mono-section, two sections buses of 0.4kV, establish 0.4kV block switch Q31 and lead-in wire.
Two group capacitors (240kVar) play inactive power compensation, are arranged on respectively in two capacitor panels, by corresponding capacitor switch Q26, are connected to respectively mono-section of 0.4kV, two sections of buses.
Be the floor plan of the utility model power distribution station as shown in Figure 5, two groups of totally six 10kV high-voltage board 6(SF6 ring main units) be positioned at hyperbaric chamber.The 0.4kV low voltage incoming line cabinet 1(of two relative set 0.4kV service entrance switchs is as GGD2-02), the 0.4kV low-pressure line-outgoing cabinet 2(of six relative set outlet switchs is as GGD2-38), two capacitor panel 3(are as GGD), a low pressure segmentation cabinet 4(that 0.4kV block switch is set is as GGD2-02) and some low pressure copper busbars 5(TMY-100 * 10) be positioned at low-pressure chamber.No. 1 transformer and No. 2 transformers are connected to the relevant device in hyperbaric chamber and low-pressure chamber by turnover cable separately.
According to the filthy rank of site, the creepage of current period engineering equipment selected by III level than distance, and 10V and following equipment are creepage than considering by 31mm/kV apart from outdoor, and the indoor 25mm/kV that presses considers.Below newly-increased each electrical room and protection screen screen cabinet, and Cable Reformation, related cable interlayer, floor through walls, wall, cabinet, dish place has cable cavern and gap to carry out fireproof blocking when newly-increased.And adopt fire prevention band to paste or painting fireproof paint the cable sheath within the scope of each 1m of shutoff place both sides.
As shown in Fig. 2, Fig. 5, in this example, can in Nei Dui hyperbaric chamber, existing site, transform with low pressure indoor equipment, without other expropriation of land.
In sum, the PT2 type power distribution station that the utility model provides, do not changing under the prerequisite of original scale and electrical wiring mode, power distribution station primary equipment is changed, SF6 load plug-in strip is set and is equipped with SF6 warning device, be conducive to improve the general level of the health and the safety operation level of equipment, the workload of reduce maintenance, safeguarding, improves power supply reliability.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.Those skilled in the art, read after foregoing, for multiple modification of the present utility model with to substitute will be all apparent.Therefore, protection range of the present utility model should be limited to the appended claims.

Claims (7)

1. two enter a PT2 type power distribution station for scene 2 band segmentation, it is characterized in that, comprise:
One road 10kV inlet wire is communicated with mono-section of bus of 10kV, also by a set of SF6 load plug-in strip, is communicated with No. 1 transformer, and the mono-section of bus of 0.4kV and many outlets thereof that convert to after 0.4kV as being connected to by a set of 0.4kV service entrance switch after No. 1 transformer are powered;
Another road 10kV inlet wire is communicated with bis-sections of buses of 10kV, also by another set of SF6 load plug-in strip, is communicated with No. 2 transformers, and the bis-sections of buses of 0.4kV and many outlets thereof that convert to after 0.4kV as being connected to by another set of 0.4kV service entrance switch after No. 2 transformers are powered;
Between bis-sections of buses of mono-section of bus of described 10kV and 10kV, by 10kV block switch, be connected; Between bis-sections of buses of mono-section of bus of described 0.4kV and 0.4kV, by 0.4kV block switch, be connected.
2. PT2 type power distribution station as claimed in claim 1, is characterized in that,
Described SF6 load plug-in strip is arranged at SF6 ring main unit;
Described 0.4kV service entrance switch is arranged at GGD cabinet.
3. PT2 type power distribution station as claimed in claim 2, is characterized in that,
One end of described SF6 load plug-in strip is connected with 10kV inlet wire by copper bus-bar, this SF6 load plug-in strip other end was by after fuse, current transformer minute two-way, lead up to capacity earth, another road is connected to leading-out terminal and is connected to No. 1 or No. 2 transformers by outlet cable.
4. PT2 type power distribution station as claimed in claim 2, is characterized in that,
One end of described SF6 load plug-in strip is connected with 10kV inlet wire by copper bus-bar, and this SF6 load plug-in strip other end is by Fen San road after current transformer, and two-way is connected to respectively electric capacity and the lightning arrester of ground connection, and another road is connected to leading-out terminal.
5. the PT2 type power distribution station as described in any one in claim 1-4, is characterized in that,
The neutral ground form of No. 1, No. 2 transformer is direct ground connection; The 10kV side of No. 1, No. 2 transformer is installed respectively one group of lightning arrester.
6. PT2 type power distribution station as claimed in claim 5, is characterized in that,
In each outlet of mono-section of bus of 0.4kV and bis-sections of buses of 0.4kV, be respectively equipped with outlet switch;
Two group capacitors, by corresponding capacitor switch, are connected to respectively mono-section of bus of described 0.4kV and bis-sections of buses of 0.4kV; Each 0.4kV service entrance switch, 0.4kV block switch, outlet switch, capacitor switch are all the vacuum circuit-breakers that are arranged at GGD cabinet.
7. PT2 type power distribution station as claimed in claim 6, is characterized in that,
Two groups of high-voltage boards that SF6 load plug-in strip is set are respectively positioned at hyperbaric chamber;
The low voltage incoming line cabinet of two relative set 0.4kV service entrance switchs, the low-pressure line-outgoing cabinet of six relative set outlet switchs, two capacitor panels, a low pressure segmentation cabinet that 0.4kV block switch is set are positioned at low-pressure chamber;
No. 1, No. 2 transformers, by corresponding line cable, access respectively the high-voltage board in hyperbaric chamber, and by the low voltage incoming line cabinet of low pressure copper busbar access low-pressure chamber.
CN201420149736.0U 2014-03-31 2014-03-31 Two-input two-output PT2 power distribution station with subsections Active CN203813222U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106327842A (en) * 2016-10-26 2017-01-11 杭州欣美成套电器制造有限公司 Ring main unit temperature and current wireless collection device and collection method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106327842A (en) * 2016-10-26 2017-01-11 杭州欣美成套电器制造有限公司 Ring main unit temperature and current wireless collection device and collection method

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