JPH10145912A - Unit integration type private transformation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect high voltage receiving apparatuses from moisture and adhesion of dusts and suppress the temperature rise of transformers by a method wherein a high voltage apparatus unit mounted in a box which is enclosed with a cover plate and high voltage apparatuses attached in the box, and transformer units which are composed of transformers and branch boxes in which groups of wiring breakers are housed and which are attached to the transformers are installed in a transformation chamber. SOLUTION: A high voltage apparatus unit 204, a single-phase 3-wire system 100V lighting transformer unit 206 and a 3-phase 200V power transformer unit 209 are installed in a private transformation chamber 201. The high voltage apparatus unit 204 is formed of high voltage apparatuses such as disconnectors, power fuses, a fault current breaker, supply meter current transformers, etc., which are attached to a frame which is covered with an enclosing plate. On the other hand, the respective transformer units 206 and 209 are so constructed as to have branch boxes 207 and 210 in which groups of respective wiring breakers are housed and respective transformer cooling sirocco fans 208 and 211 attached to oil-filled transformers with radiation fins integrally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private substation.

[0002]

2. Description of the Related Art In a conventional private substation, devices such as a disconnector and a fault current breaker are mounted in an open type distribution panel of a substation room in a state of being individually exposed. In some cases, these devices are stored in a cubicle, but the devices are mounted in the cubicle in an exposed state.

[0003]

In a private substation room, ventilation is performed, so that outside air flows in, and accordingly, moisture and dust enter the room. In conventional private substation equipment, the equipment is installed in a state where it is exposed to the open-type switchboard in the substation room, so moisture and dust fall down and adhere to the equipment, resulting in reduced insulation of the equipment and poor electrical contact of the contacts. It may cause an accident of substation equipment or electric shock.

Devices are stored in a cubicle, and the cubicle may be placed in a substation room or outdoors. Ventilation is required to suppress the temperature rise inside the cubicle for both indoor and outdoor use. In the case of an indoor cubicle, moisture and dust in the substation room flow into the cubicle due to the ventilation of the cubicle, and adhere to devices that are exposed and mounted in the cubicle. In the case of an outdoor cubicle, moisture and dust contained in the outside air enter the cubicle due to ventilation, and adhere to exposed internal devices. In addition, in the case of outdoor cubicles, when hot air in the cubicle rapidly cools and contracts rapidly, such as during a sunset in midsummer, a large amount of mist-like outside air containing dust is sucked into the cubicle. There is a phenomenon.

[0005] In the case of an open-type switchboard in a substation room or a cubicle, in natural ventilation, the ventilation airflow is an ascending airflow due to an increase in the temperature of the air, but the speed of the airflow is not so high. Therefore, when the transformer capacity is large and the calorific value is large, natural ventilation alone is not sufficient. Therefore, if forced ventilation with an electric fan is used, the airflow velocity of the ventilation will be considerably high, but the air flow path is often disconnected from the transformer, and the airflow of the ventilation does not sufficiently touch the radiating fins of the transformer, so the heat flow from the transformer The effect of taking away is not enough.

[0006]

According to the present invention, in order to protect equipment from moisture and dust entering a substation room or a cubicle by ventilation, the equipment is mounted in a box and the box is closed with a cover plate. Then, a single high-voltage device unit is installed in a substation room or a cubicle. In addition, a transformer unit in which a branch box containing a group of circuit breakers is firmly attached to a transformer is installed in a substation room or a cubicle.

[0007] Since the high-pressure equipment unit has a box body closed by a cover plate, the inside of the unit is hardly ventilated. Therefore, the invasion of air from the outside is extremely small, and the invasion of moisture and dust is hardly. Therefore, moisture and dust do not adhere to the devices in the unit. In particular, control parts that dislike moisture and dust have a hermetically closed structure. Since the amount of heat generated by each device and the circuit breaker is not so large, even with a closed structure, the temperature rise in the unit is slight and does not harm the devices.

In order to suppress the temperature rise of the transformer in the substation room or the cubicle, the present invention mounts an electric fan on the side of the transformer and blows strong wind directly to the radiating fins of the transformer to sufficiently radiate the heat of the transformer. Due to the sufficient heat radiation of the transformer, the temperature difference between the transformer and the surrounding air is reduced, and the rise in the temperature of the transformer is suppressed accordingly. In addition, since the air containing sufficiently radiated heat is ventilated, the ventilation efficiency is high.

[0009]

FIG. 1 to FIG. 9 show an embodiment of the present invention. FIG. 1 is a front view showing the internal structure of the high-voltage device unit, and FIG. 2 is a side view thereof. 1 and 2 show a state in which the outer closing plate is removed. FIG. 3 and FIG.
FIG. 3 is a front view, and FIG. 4 is a side view of the external view with an outer closing plate.

In FIGS. 1 and 2, reference numeral 1 denotes a disconnector, which is attached to an upper part of a frame 4 made of steel. In this embodiment, a power fuse 7 is incorporated in the disconnector 1. Reference numeral 2 denotes an accident current circuit breaker, which is attached to the center of the framework 4 after the decorative plate 6, and is a vacuum circuit breaker (VCB) in this embodiment.
Reference numeral 3 denotes a transaction metering transformer (PCT) which is installed at a lower portion.
Reference numeral 5 denotes a cable terminal processing unit, which attaches a bracket 8 to a lower portion of the framework 4 and holds a cable in the framework. Reference numeral 9 denotes a storage box for maintenance and inspection instruments.

In FIGS. 3 and 4, reference numeral 10 denotes a closing plate which is detachably attached to the upper front part of the framework 4 and 11 to the lower front part thereof. Reference numeral 12 denotes a side closing plate, and the upper and rear surfaces are also closed with closed plates (not shown). Each closing plate is fixed to the framework 4 by a stopper 13. Although not shown, the lower bottom surface of the transaction metering transformer 3 is also closed in FIG.

As described above, each high voltage device is mounted in a framework and forms a high voltage device unit covered by a closure plate. Since the high-voltage device unit is installed in the substation room or cubicle, even if moisture and dust flow into the substation room or cubicle, they do not flow into the high-voltage device unit. Therefore, moisture and dust do not adhere to each high-pressure device.

1 and 2, reference numeral 14 denotes an input cable which is held by a bracket 8 attached to a lower portion of the framework 4. Reference numeral 15 denotes an internal cable in the high-voltage equipment unit, which is connected to an input cable in the cable terminal processing unit 5. As described above, the cable terminal processing unit 5 is housed in the unit box, so that it is safe.

FIG. 5 is a top view showing an embodiment of the transformer unit of the present invention, FIG. 6 is a side view, and FIG. 7 is a front view. 5 to 7, reference numeral 101 denotes an oil-filled transformer.
Reference numeral 102 denotes a radiation fin, and reference numeral 103 denotes a transformer mounting base. 104 is a branch box in which a group of circuit breakers 105
Is housed. Reference numeral 106 denotes a mounting base of a branch box, 107 denotes a secondary terminal of a transformer, 108 denotes a copper band, 109 denotes a sirocco fan, 110 denotes an intake port, 111 denotes a support, and 112 denotes an insulator.

FIG. 8 is a plan view showing an embodiment of the unit-integrated private substation according to the present invention. A high-voltage equipment unit 204 is disposed in the private substation room 201. Since the high-voltage unit 204 is closed and non-ventilated, moisture and dust mixed with the air in the private substation room do not enter the high-voltage unit 204. 20
Reference numeral 5 denotes instruments such as an integrated power meter (WHM). Also,
Two transformer units 206 and 2 in a private substation
09 is arranged. Reference numeral 206 denotes a single-phase three-wire type transformer for 100V electric lamps, and reference numeral 209 denotes a three-phase 200V power transformer. Each has branch boxes 207 and 210 and sirocco fans 208 and 211 for cooling the transformer. 212
Is a phase advance capacitor.

FIG. 9 is a plan view showing the arrangement of a high-voltage equipment unit and a transformer unit in an indoor or outdoor cubicle. The cubicle 301 houses a high-voltage device unit 305 and a transformer unit 306 for an electric lamp, and the cubicle 307 houses a transformer unit 310 for power. 302 and 308 are cubicle doors, and 303 and 309 are side plates. 304
Is a cable lead-in section, 311 is a controller storage box, and 312 is a low-voltage advance capacitor. Since the cubicle is ventilated to suppress the rise in temperature of the transformer, moisture and dust flow into the cubicle.
Further, since the transformer units 306 and 310 are closed, moisture and dust do not enter. Although not shown, the cubicle is provided with a sufficient natural ventilation device.

[0024]

As is clear from the above description, since the high-voltage power receiving equipment in the private substation equipment is arranged as two units, the high-voltage equipment unit and the transformer unit, moisture and dust adhere to the equipment. Can be prevented. Further, since a sirocco fan for cooling the transformer is mounted on the transformer unit, the rise in the temperature of the transformer can be effectively suppressed.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of an internal structure of a high-voltage equipment unit according to the present invention.

FIG. 2 is a side view relating to the above.

FIG. 3 is an external front view of the high-voltage device unit.

FIG. 4 is an external side view relating to the above.

FIG. 5 is a top view showing one embodiment of a transformer unit according to the present invention.

FIG. 6 is a side view relating to the above.

FIG. 7 is a front view relating to the above.

FIG. 8 is a diagram showing an embodiment of a device arrangement in a private substation room according to the present invention.

FIG. 9 is a diagram showing an embodiment of equipment arrangement of a private substation facility cubicle according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disconnector 2 ... Fault current circuit breaker 3 ... Transformer for measurement of transaction (PCT) 4 ... Framework 5 ... Cable terminal processing part 6 ... Decorative board 7 ... Power fuse 8 ... Bracket 9 ... Storage box 10 ... Closure board 11 ... Closing plate 12 ... Closing plate 13 ... Clasp 14 ... Input cable 15 ... Internal cable 101 ... Transformer 102 ... Radiation fins 103 ... Installation table 104 ... Branch box 105 ... Circuit breaker group 106 ... Mounting table 107 ... Secondary terminal 108 … Copper strip 109… Sirocco fan 110… Intake port 111… Post 112… Insulator 113… Pedestal 201… Private substation room 202… Wall surface 203… Maintenance area 204… High voltage equipment unit 205… WHM 206… Transformer unit 207… Branch box 211… Sirocco fan 212: low-voltage advance capacitor 301: cubicle 302: door 303: side plate 3 04 ... Cable lead-in section 305 ... High-voltage equipment unit 306 ... Transformer 307 ... Cubicle 308 ... Door 309 ... Side plate 311 ... Controller storage box 310 ... Transformer unit 312 ... Low-voltage lead capacitor

Claims (3)

[Claims] In a private substation, a disconnecting switch, a switch, a fault current breaker, and a transformer for transaction measurement (PCT) are mounted in a free-standing box, and the high-pressure box is closed by a cover plate. A unit-integrated private substation, comprising a plurality of transformer units in which an equipment unit and a transformer and a branch box accommodating a group of circuit breakers are integrally fixed. 2. The unit-integrated private substation according to claim 1, wherein an electric fan for cooling the transformer is mounted on the transformer unit. 3. The unit-integrated private substation according to claim 1, wherein the high-voltage unit and the transformer unit are housed in a cubicle.