CN103840378A - Improved PT1 type power distribution station - Google Patents
Improved PT1 type power distribution station Download PDFInfo
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- CN103840378A CN103840378A CN201410124328.4A CN201410124328A CN103840378A CN 103840378 A CN103840378 A CN 103840378A CN 201410124328 A CN201410124328 A CN 201410124328A CN 103840378 A CN103840378 A CN 103840378A
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Abstract
The invention provides an improved PT1 type power distribution station. A 10 kV inlet wire is communicated to a transformer through a 10 kV load switch, and the transformer enables 10 kV inlet wire voltage to be converted to be 0.4 kV and then to be output. Furthermore, a 0.4 kV switch is used for being communicated with a 0.4 kV busbar, a plurality of outgoing wires arranged below the 0.4 kV are respectively provided with an outgoing wire switch, and a set of 0.4 kV capacitors are connected to the 0.4 kV busbar through a capacitor switch. The 10 kV load switch is arranged on an SF6 ring main unit, and the 0.4 kV switch, the outgoing wire switch and the capacitor switch are arranged on a vacuum circuit breaker of a GGD cabinet. According to the improved PT1 type power distribution station, under the premise that an original scale and a main wiring mode are not changed, primary equipment of the power distribution station is replaced, the health level and the safety operation level of the equipment can be better improved, the workload of repairing and maintaining is reduced, and the reliability of power supply is improved.
Description
Technical field
The present invention relates to power distribution field, particularly a kind of improved PT1 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 eighties, move a distribution transforming that capacity is 800kVA, and 10kV side is on-load switch inlet wire, and 0.4kV wiring adopts single bus scheme.
As shown in Figure 1, one road 10kV inlet wire is communicated to transformer through on-load switch S1, this transformer is exported after 10kV primary voltage is converted to 0.4kV, and be further communicated with 0.4kV bus by 0.4kV switch S 2, eight outlets that this 0.4kV bus is divided into are provided with outlet switch separately, and one group of 0.4kV capacitor is connected to this bus by capacitor switch.
Fig. 2 is the floor plan of existing power distribution station, and high voltage load switch uses FN3-10 high voltage knife, controls being communicated with or disconnection between 10kV inlet wire and transformer; In low-pressure chamber, arrange corresponding switch with PGL2 cabinet as 0.4kV low voltage incoming line cabinet, 0.4kV low-pressure line-outgoing cabinet and capacitor box.
But equipment is outmoded 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.
Summary of the invention
The object of this invention is to provide a kind of improved PT1 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, technical scheme of the present invention is to provide a kind of improved PT1 type power distribution station, and it comprises:
One road 10kV inlet wire is communicated to transformer through 10kV on-load switch, this transformer is exported after 10kV primary voltage is converted to 0.4kV, and be further communicated with 0.4kV bus by 0.4kV switch, many the outlets that this 0.4kV bus is divided into are provided with outlet switch separately, and one group of 0.4kV capacitor is connected to this 0.4kV bus by capacitor switch;
10kV on-load switch is arranged at SF6 ring main unit, and described 0.4kV switch, outlet switch, capacitor switch are the vacuum circuit-breakers that is arranged at GGD cabinet.
Preferably, described 10kV on-load switch one end is connected with 10kV inlet wire, this 10kV on-load switch other end is by after fuse, current transformer point of two-way, leads up to capacity earth, and another road is connected to leading-out terminal and is connected to transformer by outlet cable.
Preferably, described 10kV on-load switch one end is connected with 10kV inlet wire, and this 10kV on-load switch 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 described transformer is direct ground connection; The 10kV side of this transformer is provided with one group of lightning arrester.
Preferably, one group of SF6 ring main unit that 10kV on-load switch is set is positioned at hyperbaric chamber;
One arranges the 0.4kV low voltage incoming line cabinet of 0.4kV service entrance switch, and four arrange the 0.4kV low-pressure line-outgoing cabinet of 2 outlet switchs separately, and a 0.4kV low-voltage capacitor box that capacitor switch is set is positioned at low-pressure chamber; Transformer is by the 0.4kV low voltage incoming line cabinet of low pressure copper busbar access low-pressure chamber.
Preferably, in SF6 ring main unit, be provided with SF6 warning device.
Compared with prior art, PT1 type power distribution station provided by the invention, do not changing under the prerequisite of original scale and main wiring mode, power distribution station primary equipment is changed, SF6 on-load switch 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 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 PT1 type power distribution station of the present invention;
Fig. 4 is 0.4kV electrical wiring schematic diagram in PT1 type power distribution station of the present invention;
Fig. 5 is the floor plan of power distribution station of the present invention.
Embodiment
As shown in Figure 3,4, the invention provides a kind of PT1 type power distribution station (PT1 type, the i.e. looped network power distribution station with 1 station power distribution transformer and 10kV outlet), one road 10kV inlet wire is communicated to transformer through 10kV on-load switch, this transformer is exported after 10kV primary voltage is converted to 0.4kV, and be further communicated with 0.4kV bus by 0.4kV switch S 2, and eight outlets that this 0.4kV bus is divided into are provided with outlet switch S3 separately, and one group of 0.4kV capacitor is connected to this bus by capacitor switch S4.
10kV on-load switch is positioned at hyperbaric chamber, is equipped with 2 of 10kV line SF6 ring main units, 1 of 10kV distribution transforming SF6 ring main unit.
In SF6 ring main unit as shown in Figure 3, a switch cubicle uses following device mode to arrange: wherein one end of on-load switch is connected with 10kV inlet wire, this on-load switch other end is leaded up to capacity earth after by fuse, current transformer, and another road is connected to leading-out terminal and is further connected to transformer 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.
Two other switch cubicle uses following another kind of device arrangements mode: on-load switch is 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 pass through leading-out terminal connection transformer, or be connected to meet different wiring needs from the device in other switch cubicles.
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 on-load switch 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, the outlet of distribution transforming 0.4kV side adopts low pressure copper bus-bar.Each position in storehouse primary equipment ground connection is used 5*40 band iron, and is connected with indoor ground connection main line.
10kV/0.4kV transformer is positioned at distribution transforming chamber, is used for changing 10kV primary voltage into 0.4kV output, and transformer neutral point ground connection form is direct ground connection.The 10kV inlet wire side of this transformer is provided with one group of 10kV inlet wire lightning arrester, plays lightning protection effect.
As shown in Figure 4, the switch of all 0.4kV sides is all 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 invention, be provided with altogether 1 0.4kV service entrance switch, 8 outlet switchs, 1 capacitor switch.Be equipped with altogether 1 of 0.4kV low voltage incoming line cabinet, 4,0.4kV low-pressure line-outgoing cabinet, 1 of 0.4kV low-voltage capacitor box, and auxiliary be furnished with SF6 warning device 1 and overlap.
That is, the 0.4kV low-pressure side of transformer is connected to 0.4kV bus by 0.4kV service entrance switch S2, current transformer, in 8 outlets dividing into, corresponding outlet switch S3 and current transformer is set separately.One group capacitor (240kVar) plays inactive power compensation, is arranged in capacitor panel, is connected to 0.4kV bus by capacitor switch S4.
Be the floor plan of power distribution station of the present invention as shown in Figure 5, one group of SF6 ring main unit 4 is positioned at hyperbaric chamber; In low-pressure chamber, be equipped with 6 GGD cabinets, P1 cabinet is the 0.4kV low voltage incoming line cabinet that 0.4kV service entrance switch is set, and P2-P5 cabinet is the 0.4kV low-pressure line-outgoing cabinet that 2 outlet switchs are set separately, and P6 cabinet is the 0.4kV low-voltage capacitor box that capacitor switch is set; Auxiliary in this example be furnished with SF6 warning device 1 and overlap.Transformer is communicated with respectively the relevant device of hyperbaric chamber and low-pressure chamber by corresponding turnover cable.
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. 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, PT1 type power distribution station provided by the invention, do not changing under the prerequisite of original scale and electrical wiring mode, power distribution station primary equipment is changed, SF6 on-load switch 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 invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Read after foregoing those skilled in the art, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
1. an improved PT1 type power distribution station, is characterized in that, comprises:
One road 10kV inlet wire is communicated to transformer through 10kV on-load switch, this transformer is exported after 10kV primary voltage is converted to 0.4kV, and be further communicated with 0.4kV bus by 0.4kV switch, many the outlets that this 0.4kV bus is divided into are provided with outlet switch separately, and one group of 0.4kV capacitor is connected to this 0.4kV bus by capacitor switch;
10kV on-load switch is arranged at SF6 ring main unit, and described 0.4kV switch, outlet switch, capacitor switch are the vacuum circuit-breakers that is arranged at GGD cabinet.
2. PT1 type power distribution station as claimed in claim 1, is characterized in that,
Described 10kV on-load switch one end is connected with 10kV inlet wire, and this 10kV on-load switch other end is by after fuse, current transformer point of two-way, leads up to capacity earth, and another road is connected to leading-out terminal and is connected to transformer by outlet cable.
3. PT1 type power distribution station as claimed in claim 1, is characterized in that,
Described 10kV on-load switch one end is connected with 10kV inlet wire, and this 10kV on-load switch 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.
4. PT1 type power distribution station as claimed in claim 1, is characterized in that,
The neutral ground form of described transformer is direct ground connection; The 10kV side of this transformer is provided with one group of lightning arrester.
5. PT1 type power distribution station as claimed in claim 1, is characterized in that,
One group of SF6 ring main unit that 10kV on-load switch is set is positioned at hyperbaric chamber;
One arranges the 0.4kV low voltage incoming line cabinet of 0.4kV service entrance switch, and four arrange the 0.4kV low-pressure line-outgoing cabinet of 2 outlet switchs separately, and a 0.4kV low-voltage capacitor box that capacitor switch is set is positioned at low-pressure chamber; Transformer is by the 0.4kV low voltage incoming line cabinet of low pressure copper busbar access low-pressure chamber.
6. the PT1 type power distribution station as described in claim 2 or 3 or 5, is characterized in that,
In SF6 ring main unit, be provided with SF6 warning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410124328.4A CN103840378A (en) | 2014-03-31 | 2014-03-31 | Improved PT1 type power distribution station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410124328.4A CN103840378A (en) | 2014-03-31 | 2014-03-31 | Improved PT1 type power distribution station |
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| CN103840378A true CN103840378A (en) | 2014-06-04 |
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| CN201410124328.4A Pending CN103840378A (en) | 2014-03-31 | 2014-03-31 | Improved PT1 type power distribution station |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319726A (en) * | 2014-10-23 | 2015-01-28 | 国家电网公司 | Low voltage cable branch box wiring system |
| CN104682246A (en) * | 2015-02-11 | 2015-06-03 | 国网浙江海盐县供电公司 | SF6 leakage warning device for distribution network switching station |
| CN106376198A (en) * | 2016-11-10 | 2017-02-01 | 南京铁道职业技术学院 | Positioning type transformer substation centralized dispatching system and method |
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| CN101295860A (en) * | 2008-06-19 | 2008-10-29 | 江苏省电力公司泰州供电公司 | Chamber type communication transforming plant for reducing voltage from 10kV to 0.4kV |
| CN201282292Y (en) * | 2008-09-01 | 2009-07-29 | 哈尔滨亿汇达电气科技发展有限公司 | Intelligent high/low-voltage prepackage box-type transformer substation |
| CN101577400A (en) * | 2009-06-15 | 2009-11-11 | 江苏省电力公司泰州供电公司 | Chamber type liaison transforming plant reduced by 0.4kV from 20kV/10KV |
| CN203813217U (en) * | 2014-03-31 | 2014-09-03 | 国网上海市电力公司 | Improved PT1 type power distribution station |
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2014
- 2014-03-31 CN CN201410124328.4A patent/CN103840378A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295860A (en) * | 2008-06-19 | 2008-10-29 | 江苏省电力公司泰州供电公司 | Chamber type communication transforming plant for reducing voltage from 10kV to 0.4kV |
| CN201282292Y (en) * | 2008-09-01 | 2009-07-29 | 哈尔滨亿汇达电气科技发展有限公司 | Intelligent high/low-voltage prepackage box-type transformer substation |
| CN101577400A (en) * | 2009-06-15 | 2009-11-11 | 江苏省电力公司泰州供电公司 | Chamber type liaison transforming plant reduced by 0.4kV from 20kV/10KV |
| CN203813217U (en) * | 2014-03-31 | 2014-09-03 | 国网上海市电力公司 | Improved PT1 type power distribution station |
Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319726A (en) * | 2014-10-23 | 2015-01-28 | 国家电网公司 | Low voltage cable branch box wiring system |
| CN104682246A (en) * | 2015-02-11 | 2015-06-03 | 国网浙江海盐县供电公司 | SF6 leakage warning device for distribution network switching station |
| CN106376198A (en) * | 2016-11-10 | 2017-02-01 | 南京铁道职业技术学院 | Positioning type transformer substation centralized dispatching system and method |
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Application publication date: 20140604 |