CN1538585A

CN1538585A - Allocation transformer equipment

Info

Publication number: CN1538585A
Application number: CNA2004100085434A
Authority: CN
Inventors: |原悟; 梶原悟; 治; 土屋贤治; 修一; 喜久川修一
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2003-03-26
Filing date: 2004-03-25
Publication date: 2004-10-20
Anticipated expiration: 2024-03-25
Also published as: JP2004312989A; KR20040084809A; JP4110411B2; TWI234328B; CN1331292C; TW200423513A

Abstract

The purpose of the invention is to reduce the power loss during power distribution. The power room 4 and the each transformer device 11 are allocated separately. The electrical power whose voltage which does not step-down is carried on the loading switch 1a-1d of the power room, and is supplied to each transformer device 11 without variation through the power cables 3a, 3b. The electrical power whose voltage steps down is carried on the transformer 13 of each transformer device 11, and is supplied to each load through the secondary switch 14.

Description

Allocation transformer equipment

Technical field

The present invention relates to allocation transformer equipment, particularly be suitable in building and factory etc., accept from the voltage of distribution system and carry out transformation, the allocation transformer equipment of the electric power after the transformation to a plurality of electric.

Background technology

Up to now, in buildings such as building, acceptance is from the voltage and the step-down of distribution system, when then the electric power after the step-down being supplied with a plurality of load, the structure that is adopted is, in the electric panel room in building, circuit breaker, transformer, switch etc. are set, by the voltage of circuit breaker acceptance from three-phase high-voltage main line (6.6kV/22kV), utilize transformer the voltage step-down of accepting (105/210V), and supply with a plurality of loads (with reference to patent documentation 1) by switch and the low-voltage bus bar voltage (power cable) after step-down.

Patent documentation 1 for the spy opens flat 8-251820 communique (the 3rd page to the 4th page, Fig. 1).

In the prior art, owing to adopted transformer be set in electric panel room, by low-voltage bus bar utilizing transformer to carry out the structure that voltage after the step-down is supplied with a plurality of loads, therefore have in electric panel room, to be provided with and the corresponding jumbo transformer of capacity, thereby the area occupied of electric panel room can increase as the load of distribution object.And jumbo transformer must be useful on the equipment that solves noise or exhausting problem, thereby the area occupied of electric panel room can further increase.In addition, connect low-voltage bus bar distribution in building of electric panel room and load, square being directly proportional of the power consumption that causes because of distribution and electric current, so follow the elongated power consumption of length of low-voltage bus bar big more.

Summary of the invention

Power consumption when problem of the present invention is to reduce distribution.

In order to solve above-mentioned problem, the present invention connects to be configured in by power cable and accepts in the electric panel room to be subjected to electricity with switch and to a plurality of distribution boards that are subjected to of load distribution from the voltage of distribution system, the above-mentioned distribution board that respectively is subjected to is dispersed in each load-side, simultaneously, described a plurality of transformer that the voltage that is added to described power cable is carried out step-down and exports to described load that is subjected to be provided with in the distribution board.

By the present invention, when can reducing to follow the power consumption of distribution, can also reduce the area occupied of electric panel room.

Description of drawings

Fig. 1 is the structured flowchart of the allocation transformer equipment of expression one embodiment of the present of invention.

Fig. 2 is the single line diagram of allocation transformer equipment related to the present invention.

The stereogram of each parts when Fig. 3 is separate transformers.

Fig. 4 is the single line diagram that is used for illustrating the closed circuit mode of allocation transformer equipment related to the present invention.

Fig. 5 is to use the structured flowchart of the device for transformer of solid insulation bus.

The structured flowchart of the device for transformer when Fig. 6 is to use power cable.

Embodiment

Below, with reference to the accompanying drawings an example of the present invention is described.Fig. 1 is the structured flowchart of the allocation transformer equipment of expression one embodiment of the present of invention, and Fig. 2 is the single line diagram of allocation transformer equipment.

In Fig. 1 and Fig. 2, when in the building that allocation transformer equipment is arranged on building etc., its structure that adopts is: the basement at the floor that constitutes building is provided with electric panel room 4, each floor on the ground or every a floor, be provided as the device for transformer that is subjected to distribution board, the voltage of accepting at electric panel room 4 (6kV/22kV) is not carried out step-down, directly supply with each potential device 11 by

power cable

3a, 3b.

Specifically, in the electric panel room 4 of the basement that is located at building, be provided with as main be subjected to electricity with on-load switch 1a, the 1b of switch, as auxiliary be subjected to electric with on-load switch 1c, the 1d of switch and the transformer of using by the measuring instrument that electric company provides in order to measure employed electric power.On-load switch 1a is connected on the main line 21 among the extra-lnigh tension distribution wire (6.6kV/22kV) of 2 circuits, on-load switch 1b is connected on the preparation line 22, and each on-

load switch

1a, 1b accept from the voltage of main line 21 or preparation line 22 respectively and export to on-

load switch

1c, 1d one side.On-load switch 1c supplies with each device for transformer 11 to the voltage of accepting by on-

load switch

1a or 1b by measuring instrument with transformer 2a, power cable 3a.On the other hand, on-load switch 1d supplies with each device for transformer 11 to the voltage of on-

load switch

1a or 1b acceptance by metrical instrument with transformer 2b, power cable

3b.Power cable

3a, 3b are in series and connect and on-

load switch

1c, 1d together form the closed-loop path, are inserted with each device for transformer 11 in this closed-loop path.

Each device for transformer 11 is made of No. the 1 switch 12a, No. the 2 switch 12b, No. the 3 switch 12c, transformer 13, a plurality of secondary switches 14.No. one

time switch

12a, 12b are connected in series mutually, are inserted in the closed-loop path, and switch 12c is inserted in the circuit of primary side of the contact that connects a switch 12a and a switch 12b and transformer 13.As each switch 12a, a 12b, 12c, for example, can use the switch of vacuum insulation, to realize miniaturization.

Transformer 13 for example utilizes, and ignition point constitutes at the silicone oil insulating transformer more than 300 ℃ or by the epoxy casting mold insulating transformer that nonflammable epoxy resin casting mold insulate, voltage (6.6kV/22kV) from

power cable

3a or 3b supply is depressurized to 105V or 210V, and the voltage after the step-down is exported to secondary switch 14 from secondary side.As this transformer 13, as shown in Figure 3, also can utilize to be separated into the epoxy casting mold insulating transformer of single part to the primary winding 13b of the periphery that is configured in 13a unshakable in one's determination, secondary coil 13c and to constitute.In the occasion that adopts the transformer that can separate, also can be moving into after 13a unshakable in one's determination, primary winding 13b, secondary coil 13c and other the separation such as parts, and assemble at the scene.

Like this, in the present embodiment, owing to the voltage step-down that handle is not accepted by on-load switch 1a～1d in electric panel room 4, by

power cable

3a, 3b it is directly supplied with the device for transformer 11 of each layer, by being dispersed in transformer 13 that each layer dispose with the voltage step-down of being accepted, voltage after the step-down is supplied with the load of each layer respectively, so there is no need in electric panel room, to be provided with jumbo transformer, can reduce the area occupied of electric panel room 4.And, because square being directly proportional of the loss that brings of distribution and electric current, the situation of the corresponding increase of power consumption meeting during with respect to usefulness low-voltage distribution, in the present embodiment, owing to directly high pressure (6.6kV/22kV) is supplied with the device for transformer 11 of each layer, therefore can be reduced the power consumption of following distribution.For example, transmit the necessary electric current of same power with 22kV and 210V, when 22kV, one of percentage when being about 210V is by reducing power consumption significantly with the 22kV distribution.

In addition, for example count the transformer 13 of 100kVA because the transformer 11 of each layer can be provided with low capacity, thereby can reduce noise or exhaust gas heat.

In addition, in the present embodiment, owing to adopted by on-

load switch

1c, 1d, power cable 3a, insert the closed circuit mode of each device for transformer 11 in the load circuit that 3b constitutes, so, as shown in Figure 4, have an accident when between 5 layers and 6 layers of building, judge when in connecting the circuit of 5 layers of building and 6 layers, having accident point 41 by accident point judgment means (not shown), by respectively at the recent switch 12a in accident point 41 both sides, 12b disconnects, can be when normal circuit be separated accident point, can be from

power cable

3a, 3b is to normal circuit supply.

In addition,,, can restrain when having an accident, forming fire, can help to improve fail safe by using the high transformer of ignition point as transformer 13.

Also have, as shown in Figure 5, connect required area by utilizing solid insulation bus switch 12c of 16 connections and transformer 13, can reducing.In addition, as shown in Figure 6, replace solid insulation bus 16 by electrification cable 3, device for transformer 11 is separated into switch-board 17 and transformer dish 18, take in switch 12a, a 12b, 12c in a switch-board 17, take in transformer 13 and secondary switch 14 in the transformer dish, the degree of freedom of machines configurations strengthens, for the more building of spatial limitation etc., it is suitable for and also becomes easy.Similarly, also can be separated into two parts to the transformer 13 and the secondary switch 14 that are accommodated in the transformer dish 18.

In addition, integrated and be disposed at each layer by utilizing vacuum insulation when each device for transformer 11 is arranged on each layer in the present embodiment switch 12a～12c and transformer 13, can cut down installing space.

Also have, in above-mentioned example, narrated about the form in any floor that electric panel room 4 or device for transformer 11 is arranged on building, also can be in the room arbitrarily in a plurality of rooms in the building that is dispersed in factory etc. electric panel room 4 and device for transformer 11 decentralized configuration.

Claims

1. allocation transformer equipment has: be configured in the electric panel room, accept to be subjected to the electricity switch from the voltage of distribution system; Accept from the described electricity that is subjected to it is characterized in that by power cable with the voltage of switch and to a plurality of distribution boards that are subjected to of load distribution,

Described a plurality of distribution board that is subjected to has: the voltage that is added to described power cable is carried out step-down and to the transformer of described load output.

2. allocation transformer equipment has: accept respectively to be subjected to the electricity switch from a plurality of masters of the voltage of a plurality of circuits of distribution system; Be configured in electric panel room with described each main electricity that is subjected to switch, described each main a plurality of auxiliary electricity switch that is subjected to that is subjected to electricity to export to different power cables with the voltage of switch output; Accept from described each auxiliary electricity that is subjected to it is characterized in that by described any power cable with the voltage of switch and to a plurality of distribution boards that are subjected to of load distribution,

3. allocation transformer equipment has: accept respectively to be subjected to the electricity switch from a plurality of masters of the voltage of a plurality of circuits of distribution system; A plurality of the assisting that described each main voltage that exported with switch by electricity is outputed in the different power cables is subjected to the electricity switch; Taking in described a plurality of master is subjected to electricity to be subjected to the electric panel room of electricity with switch with switch and described a plurality of assisting; Accept from described each auxiliary electricity that is subjected to it is characterized in that by described any power cable with the voltage of switch and to a plurality of distribution boards that are subjected to of load distribution,

Described a plurality of distribution board that is subjected to has: the voltage that is added on the described power cable is carried out step-down and this voltage is exported to the transformer of described load; Described electric panel room and described respectively being subjected on the random layer of distribution board decentralized configuration in a plurality of floors that constitute building.

4. allocation transformer equipment has: accept respectively to be subjected to the electricity switch from a plurality of masters of the voltage of a plurality of circuits of distribution system; A plurality of the assisting that described each main voltage that exported with switch by electricity is outputed in the different power cables is subjected to the electricity switch; Taking in described a plurality of master is subjected to electricity to be subjected to the electric panel room of electricity with switch with switch and described a plurality of assisting; Accept from described each auxiliary electricity that is subjected to it is characterized in that by described any power cable with the voltage of switch and to a plurality of distribution boards that are subjected to of load distribution,

Described a plurality of distribution board that is subjected to has: the voltage that is added on the described power cable is carried out step-down and this voltage is exported to the transformer of described load; Described electric panel room and described any one the room that respectively is subjected in a plurality of rooms of distribution board decentralized configuration in being dispersed in building.

5. as any described allocation transformer equipment in the claim 2,3,4, it is characterized in that, be connected in series mutually, form the closed-loop path with switch with described each auxiliary electricity that is subjected to described each auxiliary power cable that be connected with switch by electricity.

6. as any described converting equipment that is subjected in the claim 2,3,4, it is characterized in that, the described distribution board that is subjected to has a plurality of switches that are connected with described any power cable, a described a plurality of switch comprises: be inserted in the described power cable arbitrarily No. the 1 switch and No. the 2 switch of being connected in series mutually; Be inserted into No. the 3 switch in the circuit of the tie point that links described No. the 1 switch and described No. the 2 switch and described transformer; Connect described each auxiliary electricity that is subjected to and be connected in series mutually, form the closed-loop path with switch with described each auxiliary electricity that is subjected to the power cable of switch.

7. as any described converting equipment that is subjected among the claim 1,2,3,4, it is characterized in that the described distribution board that is subjected to has a plurality of switches that are connected with described any power cable, described a plurality of switches are made of the switch of vacuum insulation.

8. as any described converting equipment that is subjected among the claim 1,2,3,4, it is characterized in that described transformer is made of the silicone oil insulating transformer with the silicone oil insulation.

9. as any described converting equipment that is subjected among the claim 1,2,3,4, it is characterized in that the epoxy casting mold insulating transformer that transformer utilizes the epoxy resin casting mold to insulate constitutes.

10. as any described converting equipment that is subjected among the claim 1,2,3,4, it is characterized in that, described transformer has unshakable in one's determination and is configured in peripheral primary winding and secondary coil unshakable in one's determination, and described iron core constitutes in the mode that can separate with described primary winding and secondary coil.