CN203826781U - PT2 power distribution station - Google Patents

PT2 power distribution station Download PDF

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Publication number
CN203826781U
CN203826781U CN201420149737.5U CN201420149737U CN203826781U CN 203826781 U CN203826781 U CN 203826781U CN 201420149737 U CN201420149737 U CN 201420149737U CN 203826781 U CN203826781 U CN 203826781U
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China
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switch
transformer
power distribution
bus
distribution station
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CN201420149737.5U
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Chinese (zh)
Inventor
谢邦鹏
游兆阳
王何舟
陈雪瓅
徐静芝
陆海风
沈晓清
张恺伦
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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 PT2 power distribution station. A 10kV inlet wire communicates with No.1 transformer through a set of SF6 load knife switch, and supplies power to a first section of 0.4 kV bus and a plurality of outlet wires behind the No.1 transformer after the 10kV power is converted into 0.4kV. Another 10kV inlet wire communicates with No.2 transformer through another set of SF6 load knife switch, and supplies power to a second section of 0.4 kV bus and a plurality of outlet wires behind the No.2 transformer after the 10kV power is converted into 0.4kV. The first section of bus is connected with the second section of bus through a section switch. Primary equipment of the power distribution station is changed without changing the original scale and main wiring mode. The PT2 power distribution station is improved the healthy and safety operation level, unkeeping and maintenance workload can be minimized, and the power supply reliability is improved.

Description

A kind of PT2 type power distribution station
Technical field
The utility model relates to power distribution field, particularly a kind of PT2 type power distribution station.
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, and Fig. 1, Fig. 2 have provided two kinds of sample situations.
As shown in Figure 1, a road 10kV inlet wire is connected to transformer No. 1 through K switch 1, K switch 11, fuse, and then for being connected in mono-section of bus of 0.4kV and six the outlets power supplies thereof after No. 1 transformer; Another road 10kV inlet wire is connected to transformer No. 2 through K switch 2, K switch 21, fuse, and then for being connected in bis-sections of buses of 0.4kV and six the outlets power supplies thereof after No. 2 transformers.Also be provided with the cable of K switch 3, K switch 4 and connect this two-way 10kV inlet wire.
As shown in Figure 2 in the device syndeton of 0.4kV side to above-mentioned similar, and 10kV Ce mono-road inlet wire is connected to transformer No. 1 through switch S 1, switch S 11, another road inlet wire of 10kV side is connected to transformer No. 2 through switch S 2, switch S 21, mono-section, two sections buses of 10kV connect by block switch S3, and these two bus places are also respectively arranged with lightning arrester.
Fig. 3 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.Place four high-voltage boards 6 in hyperbaric chamber, 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.
But the device of prior art mesohigh side (conventionally using the high-voltage board of GG1A type to realize), equipment is outmoded, and 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 PT2 type power distribution station, 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 PT2 type power distribution station, and it comprises:
One road 10kV inlet wire is communicated with No. 1 transformer by a set of SF6 load plug-in strip, converts to after 0.4kV as being connected to mono-section of bus of 0.4kV and many outlets power supplies thereof after No. 1 transformer;
Another road 10kV inlet wire is communicated with No. 2 transformers by another set of SF6 load plug-in strip, converts to after 0.4kV as being connected to bis-sections of buses of 0.4kV and many outlets power supplies thereof after No. 2 transformers; Between described one section of bus and two sections of buses, be connected by block switch.
Preferably, described SF6 load plug-in strip is arranged at SF6 ring main unit.
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 point of two-way, lead up to capacity earth, another road is connected to leading-out terminal and is further 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; One group of lightning arrester is installed respectively in the high-pressure side of No. 1, No. 2 transformer.
Preferably, the low-pressure side of No. 1 transformer connects mono-section of bus of 0.4kV by a distribution transformation switch, in each outlet of this section of bus, is respectively equipped with outlet switch;
The low-pressure side of No. 2 transformers connects bis-sections of buses of 0.4kV by another distribution transformation switch, in each outlet of these two sections of buses, is respectively equipped with outlet switch;
Two group capacitors are connected to respectively described one section of bus and two sections of buses by corresponding capacitor switch; Described distribution transformation switch, outlet switch, capacitor switch are vacuum circuit-breakers.
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 distribution transformation switchs, the low-pressure line-outgoing cabinet of six relative set outlet switchs, two capacitor panels, a low pressure segmentation cabinet that 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 main 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.
Brief description of the drawings
Fig. 1, Fig. 2 are two kinds of electrical wiring schematic diagrames of existing power distribution station;
Fig. 3 is the floor plan of existing power distribution station;
Fig. 4 is the electrical wiring schematic diagram of a main electrical scheme in PT2 type power distribution station described in the utility model;
Fig. 5 is the electrical wiring schematic diagram of PT2 type power distribution station described in the utility model;
Fig. 6 is the floor plan of the utility model power distribution station.
Embodiment
As shown in Figure 4,5, the utility model provides a kind of PT2 type power distribution station (PT2 type, i.e. the looped network power distribution station with 2 transformers and 10kV outlet), and main electrical scheme still adopts two to enter the mode of scene 2 band segmentation., 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 0.4kV, connect by block switch.
Two groups of 10kV high-voltage boards (first, second) are positioned at hyperbaric chamber, adopt respectively SF6 load plug-in strip, and configure spring operating mechanism, are communicated with or are disconnected corresponding 10kV inlet wire by load plug-in strip.
In this example, above-mentioned 10kV high-voltage board adopts SF6 ring main unit as shown in Figure 4.There are two switch cubicles to use following device mode: 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, another road is connected to leading-out terminal, and then can be connected to No. 1 or No. 2 transformers by outlet cable; 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 have and use following another kind of device arrangements mode in four switch cubicles: SF6 load plug-in strip is connected to respectively electric capacity and the lightning arrester of leading-out terminal and ground connection after by current transformer, can pass through leading-out terminal connection transformer, or (SF6 arranging such as above-mentioned front a kind of mode loads plug-in strip as K switch 11 to be connected to meet different wiring needs from the device in other switch cubicles, K12 or S11, S21, the SF6 load plug-in strip that rear a kind of mode is arranged is as other switches in square frame, the connection plan shown in design of graphics 1 or Fig. 2 cooperatively interacts, etc.).
Current period short circuit current level with reference to early stage equipment select, 10kV short circuit current level press 20kA consider.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 is done to reconfiguration, all used flame retardant cable.For example, adopt ZA-YJV-8.7/10-3X70 cable at 10kV side inlet wire, 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.One group of lightning arrester of the each installation in high-pressure side of No. 1, No. 2 transformer, plays lightning protection effect.
The switch of all 0.4kV sides is all positioned at 0.4kV switch gear room, all adopts vacuum circuit-breaker, and each switch 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 distribution transformation switchs, 12 outlet switchs, 2 capacitor switches, 1 0.4kV block switch.
, the 0.4kV low-pressure side of No. 1 transformer connects mono-section of bus of 0.4kV by distribution transformation switch Q31, divides into 6 outlet switch Q41; The 0.4kV low-pressure side of No. 2 transformers connects bis-sections of buses of 0.4kV by distribution transformation switch Q32, divides into other 6 outlet switch Q42; Between mono-section, two sections buses of 0.4kV, establish block switch Q5.
Two group capacitors play inactive power compensation, are arranged on respectively in two capacitor panels, connect respectively mono-section of 0.4kV, two sections of buses by corresponding capacitor switch.
Be the floor plan of the utility model power distribution station as shown in Figure 6, 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 distribution transformation 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 panels (as GGD) 3, one arrange low pressure segmentation cabinet (as GGD2-02) and some low pressure copper busbars 5(TMY-100 × 10 of 0.4kV block switch) 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 shutoff place both sides 1m.
As shown in Fig. 3, Fig. 6, in this example, can in existing site, transform, without other expropriation of land, need be changed the equipment in power distribution station hyperbaric chamber, and equipment in low-pressure chamber and line thereof are arranged and all can be continued to use original mode, effectively reduce workload.
In sum, the PT2 type power distribution station that the utility model provides, do not changing under the prerequisite of original scale and main 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.Read after foregoing those skilled in the art, for multiple amendment of the present utility model and substitute will be all apparent.Therefore, protection range of the present utility model should be limited to the appended claims.

Claims (7)

1. a PT2 type power distribution station, is characterized in that, comprises:
One road 10kV inlet wire is communicated with No. 1 transformer by a set of SF6 load plug-in strip, converts to after 0.4kV as being connected to mono-section of bus of 0.4kV and many outlets power supplies thereof after No. 1 transformer;
Another road 10kV inlet wire is communicated with No. 2 transformers by another set of SF6 load plug-in strip, converts to after 0.4kV as being connected to bis-sections of buses of 0.4kV and many outlets power supplies thereof after No. 2 transformers; Between described one section of bus and two sections of buses, be connected by block switch.
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.
3. PT2 type power distribution station as claimed in claim 1, 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 is by after fuse, current transformer point of 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 1, 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; One group of lightning arrester is installed respectively in the high-pressure side of No. 1, No. 2 transformer.
6. PT2 type power distribution station as claimed in claim 5, is characterized in that,
The low-pressure side of No. 1 transformer connects mono-section of bus of 0.4kV by a distribution transformation switch, in each outlet of this section of bus, is respectively equipped with outlet switch;
The low-pressure side of No. 2 transformers connects bis-sections of buses of 0.4kV by another distribution transformation switch, in each outlet of these two sections of buses, is respectively equipped with outlet switch;
Two group capacitors are connected to respectively described one section of bus and two sections of buses by corresponding capacitor switch; Described distribution transformation switch, outlet switch, capacitor switch are vacuum circuit-breakers.
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 distribution transformation switchs, the low-pressure line-outgoing cabinet of six relative set outlet switchs, two capacitor panels, a low pressure segmentation cabinet that 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.
CN201420149737.5U 2014-03-31 2014-03-31 PT2 power distribution station Active CN203826781U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420149737.5U CN203826781U (en) 2014-03-31 2014-03-31 PT2 power distribution station

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Application Number Priority Date Filing Date Title
CN201420149737.5U CN203826781U (en) 2014-03-31 2014-03-31 PT2 power distribution station

Publications (1)

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CN203826781U true CN203826781U (en) 2014-09-10

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103840380A (en) * 2014-03-31 2014-06-04 国网上海市电力公司 PT2 type power distribution station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103840380A (en) * 2014-03-31 2014-06-04 国网上海市电力公司 PT2 type power distribution station

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