KR20040084809A

KR20040084809A - Incoming transfer facility

Info

Publication number: KR20040084809A
Application number: KR1020040020260A
Authority: KR
Inventors: 가지와라사토루; 츠치야겐지; 기쿠가와슈이치
Original assignee: 가부시끼가이샤 히다치 세이사꾸쇼
Priority date: 2003-03-26
Filing date: 2004-03-25
Publication date: 2004-10-06
Also published as: JP2004312989A; JP4110411B2; CN1538585A; TWI234328B; CN1331292C; TW200423513A

Abstract

PURPOSE: A power receiving and distributing facility is provided to reduce an electric power loss generated during a power distribution and to reduce the size of an Electrical equipment room. CONSTITUTION: A power receiving and distributing facility includes a switch for power reception and a plurality of power receiving-distributing plates. The switch for power reception is arranged in an electrical equipment room(4) and receives a power from a power distributing system. The plurality of power receiving-distributing plates receive the power from the switch for power reception by way of an electric power cable(3,3a,3b) and distribute the electric power to a load. The plurality of power receiving-distributing plates includes a transformer(11) which reduces a voltage applied on the electric power cable and outputs the reduced voltage to the load.

Description

Water substation facility {INCOMING TRANSFER FACILITY}

본 발명은, 수변전설비에 관한 것으로, 특히 빌딩이나 공장 등에 있어서, 배전계통으로부터의 전력을 수전하여 변압하고, 변압된 전력을 복수의 부하에 배전하는 것에 적합한 수변전설비에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water substation facility, and more particularly, to a water substation facility suitable for receiving and transforming electric power from a distribution system and distributing the transformed electric power to a plurality of loads in buildings and factories.

종래, 빌딩 등의 건물 내에 있어서, 배전계통으로부터의 전력을 수전하여 강압하고, 강압된 전력을 복수의 부하에 배전할 때에 있어서, 건물 내의 전기실에 차단기, 변압기, 개폐기 등을 설치하고, 3상 고압간선(6.6kV/22kV)으로부터의 전력을 차단기를 거쳐 수전하고, 수전한 전력을 변압기로 강압(105/210V)하여 강압된 전력을 개폐기와 저압모선(전력케이블)을 거쳐 복수의 부하에 배전하는 구성이 채용되어 있다(특허문헌 1 참조)Conventionally, in a building such as a building, when receiving and stepping down electric power from a distribution system, and distributing the stepped power to a plurality of loads, a circuit breaker, a transformer, a switch, and the like are installed in an electric chamber in the building, It receives power from the main line (6.6kV / 22kV) through a breaker, and stepping down the received power with a transformer (105 / 210V) to distribute the stepped power to a plurality of loads through a switch and a low voltage bus (power cable). The structure is employ | adopted (refer patent document 1).

[특허문헌 1][Patent Document 1]

일본국 특개평8-251820호 공보(제3페이지 내지 제4페이지, 도 1)Japanese Patent Laid-Open No. 8-251820 (pages 3 to 4, Fig. 1)

종래기술에 있어서는, 전기실 내에 변압기를 설치하고, 변압기로 강압한 전력을 저압모선을 거쳐 복수의 부하에 배전하도록 구성되어 있기 때문에, 전기실에 배전의 대상이 되는 부하의 용량에 따른 대용량의 변압기를 설치하는 것이 부득이하게 되어 전기실의 설치면적이 커진다. 또한 대용량의 변압기는 소음이나 배기대책을 위한 설비가 필요하게 되어, 전기실의 설치면적이 더욱 커진다. 또 전기실과 부하를 연결하는 저압모선이 건물 내에 배선되면, 배전에 의한 전력손실은 전류의 2승에 비례하기 때문에, 저압모선의 길이가 길어짐에 따라 전력손실이 증대한다.In the prior art, since a transformer is installed in an electric chamber and power distributed by the transformer is distributed to a plurality of loads through a low voltage bus, a large-capacity transformer is installed in the electric chamber according to the capacity of the load to be distributed. Inevitably, the installation area of the electrical room becomes large. In addition, large-capacity transformers need facilities for noise and exhaust measures, and thus the installation area of the electrical room becomes larger. When the low voltage bus connecting the electric chamber and the load is wired in the building, the power loss due to the power distribution is proportional to the power of the current, so the power loss increases as the length of the low voltage bus becomes longer.

본 발명의 과제는, 배전에 따르는 전력손실을 저감하는 것에 있다.An object of the present invention is to reduce power loss caused by distribution.

도 1은 본 발명의 일 실시예를 나타내는 수변전설비의 블록 구성도,1 is a block diagram of a water substation facility showing an embodiment of the present invention;

도 2는 본 발명에 관한 수변전설비의 단선 접속도,2 is a disconnected connection diagram of a water substation facility according to the present invention;

도 3은 변압기를 분할하였을 때의 각 부품의 사시도,3 is a perspective view of each part when the transformer is divided;

도 4는 본 발명에 관한 수변전설비에 있어서의 폐쇄루프방식을 설명하기 위한 단선 접속도,4 is a disconnection connection diagram for explaining a closed loop method in the water substation facility according to the present invention;

도 5는 고체 절연모선을 사용한 변압기장치의 블록 구성도,5 is a block diagram of a transformer device using a solid insulated bus,

도 6은 전력케이블을 사용하였을 때의 변압기장치의 블록 구성도이다.6 is a block diagram of a transformer device when a power cable is used.

※도면의 주요부분에 대한 부호의 설명※ Explanation of symbols for main parts of drawing

1a, 1b, 1c, 1d : 부하 개폐기 2a, 2b : 계기용 변성기1a, 1b, 1c, 1d: load switch 2a, 2b: instrument transformer

3, 3a, 3b : 전력케이블 4 : 전기실3, 3a, 3b: power cable 4: electric room

11 : 변압기장치 12a, 12b, 12c : 1차 개폐기11: transformer device 12a, 12b, 12c: primary switch

13 : 변압기 14 : 2차 개폐기13 transformer 14 secondary switch

상기 과제를 해결하기 위하여 본 발명은 전기실에 배치되어 배전계통으로부터의 전력을 수전하는 수전용 개폐기와 부하에 배전하는 복수의 수배전반을 전력케이블을 거쳐 접속하고, 상기 각 수배전반을 각각 부하측에 분산하여 배치함과 동시에, 상기 각 수배전반에 상기 전력케이블에 인가된 전압을 강압하여 부하에 출력하는 변압기를 설치한 것이다.In order to solve the above problems, the present invention is connected to a plurality of switchgear to be arranged in the electrical room to receive power from the distribution system and to distribute the power to the load via a power cable, each of the switchgear is distributed to the load side At the same time, a transformer for stepping down the voltage applied to the power cable and outputting it to the load is provided at each switchgear.

이하, 본 발명의 일 실시형태를 도면에 의거하여 설명한다. 도 1은 본 발명의 일 실시예를 나타내는 수변전설비의 블록구성도, 도 2는 수변전설비의 단선접속도이다.EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described based on drawing. 1 is a block diagram of a water substation facility according to an embodiment of the present invention, and FIG. 2 is a disconnection diagram of the water substation facility.

도 1 및 도 2에 있어서, 수변전설비를 빌딩 등의 건물에 설치할 때에 빌딩을 구성하는 계층 중 지하실에 전기실(4)을 설치하고, 지상의 각 계층 또는 1층 걸러 수배전반으로서의 변압기장치(11)를 설치하여 전기실(4)에서 수전한 전력(6.6 kV/22 kV)을 강압하지 않고 그대로 전력케이블(3a, 3b)을 거쳐 각 변압기장치(11)에 공급하는 구성이 채용되어 있다.1 and 2, when the water substation equipment is installed in a building such as a building, an electric chamber 4 is installed in a basement among the layers constituting the building, and the transformer device 11 as a switchgear in each floor or the first floor of the ground. Is provided to supply each transformer device 11 via the power cables 3a and 3b as it is without lowering the electric power (6.6 kV / 22 kV) received in the electric chamber 4.

구체적으로는 빌딩의 지하실에 설치된 전기실(4) 내에는 주 수전용 개폐기로서의 부하 개폐기(1a, 1b)와, 보조 수전용 개폐기로서의 부하 개폐기(1c, 1d), 사용전력을 계측하기 위하여 전력회사 등으로부터 공급되는 계기용 변성기(2a, 2b)가 설치되어 있다. 부하 개폐기(1a)는, 2회선의 특별 고압 배전선(6.6kV/22kV) 중 본선(21)에 접속되고, 부하 개폐기(1b)는 예비선(22)에 접속되어 있으며, 각 부하 개폐기(1a, 1b)는 각각 본선(21) 또는 예비선(22)으로부터의 전력을 수전하여 부하 개폐기(1c, 1d)측으로 출력하도록 되어 있다. 부하 개폐기(1c)는 부하 개폐기(1a또는 1b)의 수전에 의한 전력을 계기용 변성기(2a), 전력케이블(3a)을 거쳐 각 변압기장치(11)에 공급하도록 되어 있다. 한편 부하 개폐기(1d)는 부하 개폐기(1a 또는 1b)의 수전에 의한 전력을 계기용 변성기(2b), 전력케이블(3b)을 거쳐 각 변압기장치(11)에 공급하도록 되어 있다. 전력케이블(3a, 3b)은 서로 직렬로 접속되어 있고, 부하 개폐기(1c, 1d)와 함께 루프회로를 형성하여, 이 루프회로 중에 각 변압기장치(11)가 삽입되어 있다.Specifically, in the electric room 4 installed in the basement of the building, load switchgear 1a, 1b as a main power switchgear, load switchgear 1c, 1d as a switchgear for auxiliary power supply, power company, etc. to measure the power used. Instrument transformers 2a and 2b supplied from the installation are provided. The load switch 1a is connected to the main line 21 among two high-voltage special high-voltage distribution lines (6.6kV / 22kV), and the load switch 1b is connected to the spare line 22, and each load switch 1a, 1b) receives electric power from the main line 21 or the reserve line 22 and outputs them to the load switch 1c, 1d side, respectively. The load switch 1c is configured to supply electric power by the power reception of the load switch 1a or 1b to each transformer device 11 via the instrument transformer 2a and the power cable 3a. On the other hand, the load switch 1d is to supply electric power by the power reception of the load switch 1a or 1b to each transformer device 11 via the meter transformer 2b and the power cable 3b. The power cables 3a and 3b are connected in series with each other, and form a loop circuit together with the load switch 1c and 1d, and each transformer device 11 is inserted in this loop circuit.

각 변압기장치(11)는, 제 1의 1차 개폐기(12a), 제 2의 1차 개폐기(12b), 제 3의 1차 개폐기(12c), 변압기(13), 복수의 2차 개폐기(14)를 구비하여 구성되어 있다. 1차 개폐기(12a, 12b)는 서로 직렬로 접속되어 루프회로 중에 삽입되어 있고, 1차 개폐기(12c)는, 1차 개폐기(12a)와 1차 개폐기(12b)의 접속점과 변압기 (13)의 1차측을 연결하는 회로 중에 삽입되어 있다. 각 1차 개폐기(12a, 12b, 12c)로서는, 예를 들면 진공 절연된 개폐기를 사용함으로써 소형화를 도모할 수 있다.Each transformer device 11 includes a first primary switch 12a, a second primary switch 12b, a third primary switch 12c, a transformer 13, and a plurality of secondary switch 14 ) Is configured. Primary switch 12a, 12b is connected in series with each other, and is inserted in a loop circuit, and primary switch 12c of the junction of the primary switch 12a and primary switch 12b, and the transformer 13 is carried out. It is inserted in the circuit connecting the primary side. As each primary switch 12a, 12b, 12c, miniaturization can be aimed at, for example by using the vacuum insulated switchgear.

변압기(13)는, 예를 들면 인화점이 300℃ 이상인 실리콘오일 절연 변압기 또는 난연성의 에폭시수지 몰드로 절연된 에폭시 몰드 절연 변성기를 사용하여 구성되어 있고, 전력케이블(3a 또는 3b)로부터 공급된 전력(6.6 kV/22 kV)을 105V 또는 210V로 강압하여 강압된 전력을 2차측으로부터 2차 개폐기(14)에 출력하도록 되어 있다. 이 변압기(13)로서는 도 3에 나타내는 바와 같이, 철심(13a)의 주위에 배치되는 1차 코일(13b), 2차 코일(13c)이 단일 부품으로 분할 가능한 에폭시 몰드 절연 변압기로 구성할 수도 있다. 분할 가능한 변압기를 채용한 경우, 철심(13a), 1차 코일(13b), 2차 코일(13c)이나 그 밖의 부품 등을 분할하여 반입하여 설치장소에서 조립하는 것도 가능하다.The transformer 13 is configured using, for example, a silicon oil insulation transformer having a flash point of 300 ° C. or higher or an epoxy mold insulation transformer insulated with a flame-retardant epoxy resin mold, and the electric power supplied from the power cable 3a or 3b ( 6.6 kV / 22 kV) is stepped down to 105 V or 210 V to output the reduced power from the secondary side to the secondary switch 14. As this transformer 13, as shown in FIG. 3, the primary coil 13b and the secondary coil 13c arrange | positioned around the iron core 13a can also be comprised with the epoxy mold insulation transformer which can be divided into a single component. . In the case of employing a splittable transformer, the core 13a, the primary coil 13b, the secondary coil 13c, other components, and the like can be divided and carried in and assembled at the installation site.

이와 같이, 본 실시예에 있어서는 부하 개폐기(1a 내지 1d)로 수전한 전력을 전기실(4) 내에서 강압하지 않고 그대로 전력케이블(3a, 3b)을 거쳐 각 층의 변압기장치(11)에 공급하고, 각 층에 분산되어 배치된 변압기(13)로 수전한 전력을 강압하여 강압한 전력을 각각 각 층의 부하에 공급하도록 하였기 때문에, 전기실(4) 내에 대용량의 변압기를 설치할 필요가 없어 전기실(4)의 설치면적을 작게 할 수 있다. 또한 배전에 의한 손실은 전류의 2승에 비례하기 때문에, 저전압으로 배전하면 그 만큼 전력손실이 커지는 것에 대하여 본 실시예에서는 고압(6.6 kV/22 kV) 그대로 각 층의 변압기장치(11)에 전력을 공급하도록 하였기 때문에 배전에 따르는 전력손실을 저감할 수 있다. 예를 들면 22 kV와 210V에서는 동일한 전력을 보내는 데 필요한 전류는 22 kV의 경우, 210V인 경우의 약 100분의 1 이 되어 22 kV로 배전함으로써 대폭으로 전력손실을 저감할 수 있다.Thus, in this embodiment, the electric power received by the load switch 1a to 1d is supplied to the transformer apparatus 11 of each layer as it is via the power cables 3a and 3b as it is, without being forced down in the electric chamber 4. Since the power received by the transformer 13 distributed in each floor is stepped down to supply the stepped power to the load of each floor, it is not necessary to install a large-capacity transformer in the electric room 4, so that the electric room 4 The installation area of the can be reduced. In addition, since the loss due to power distribution is proportional to the square of the current, the power loss increases as much as the low voltage power is distributed. In this embodiment, the power is applied to the transformer device 11 of each layer as it is at a high voltage (6.6 kV / 22 kV). Since power supply is supplied, power loss due to power distribution can be reduced. For example, at 22 kV and 210 V, the current required to send the same power is approximately one hundredth of the case of 22 kV and 210 V, and the power loss is significantly reduced by powering it at 22 kV.

또 각 층의 변압기장치(11)에는 소용량, 예를 들면 수 100 kVA의 변압기(13)를 설치할 수 있으므로, 소음이나 배기열량을 적게 할 수 있다.In addition, since the transformer 13 of each layer can be provided with a transformer 13 having a small capacity, for example, several 100 kVA, the noise and the amount of heat of exhaust gas can be reduced.

또 본 실시예에서는 부하개폐기(1c, 1d), 전력케이블(3a, 3b)로 구성되는 부하회로 중에 각 변압기장치(11)를 삽입하는 폐쇄루프방식을 채용하고 있기 때문에, 도 4에 나타내는 바와 같이 빌딩의 5층과 6층 사이에서 사고가 생겨, 빌딩의 5층과 6층을 연결하는 회로 중에 사고점(41)이 있는 것이 사고점 판정장치(도시 생략)에 의해 판정되었을 때에는, 사고점(41)의 양측에서 가장 가까운 1차 개폐기(12a, 12b)를 각각 개방함으로써 사고점(41)을 건전회로로부터 분리할 수 있음과 동시에,건전한 회로에는 각 전력케이블(3a, 3b)로부터 전력을 공급할 수 있다.In the present embodiment, since the closed loop method of inserting each transformer device 11 into the load circuit composed of the load breakers 1c and 1d and the power cables 3a and 3b is adopted, as shown in FIG. When an accident occurs between the fifth and sixth floors of a building, and an accident point 41 is determined by an accident point determination device (not shown) in the circuit connecting the fifth and sixth floors of a building, By opening the primary switch 12a, 12b closest to each other on both sides, the accident point 41 can be separated from the healthy circuit, and power can be supplied to the healthy circuit from each of the power cables 3a, 3b. Can be.

또 변압기(13)로서 인화점이 높은 것을 사용함으로써 사고시에 화재가 되는 것을 억제할 수 있어 안전성의 향상에 기여할 수 있다.In addition, by using a high flash point as the transformer 13, it is possible to suppress a fire at the time of an accident and contribute to the improvement of safety.

또 도 5에 나타내는 바와 같이, 1차 개폐기(12c)와 변압기(13)를 고체 절연모선(16)을 거쳐 접속함으로써 접속에 요하는 면적을 적게 할 수 있다. 또 도 6에 나타내는 바와 같이 고체 절연모선(16) 대신에 전력케이블(3)을 사용하여, 변압기장치(11)를 1차 개폐기반(17)과 변압기반(18)으로 분할하여 1차 개폐반(17) 내에 1차 개폐기(12a, 12b, 12c)를 수납하고, 변압기반(18) 내에 변압기(13)와 2차 개폐기(14)를 수납함으로써 기기의 배치에 대한 자유도가 커져, 스페이스에 제한이 많은 빌딩 등에도 적용이 용이해진다. 마찬가지로 변압기반(18) 내에 수납되어 있는 변압기(13)와 2차 개폐기(14)를 2개로 분할하는 것도 가능하다.As shown in FIG. 5, the area required for connection can be reduced by connecting the primary switch 12c and the transformer 13 via the solid insulated bus line 16. In addition, as shown in FIG. 6, by using the power cable 3 instead of the solid insulated bus 16, the transformer device 11 is divided into a primary switchgear base 17 and a transformer board 18 to form a primary switchgear. The primary switchgear 12a, 12b, 12c is accommodated in (17), and the transformer 13 and the secondary switch 14 are housed in the transformer board 18, which increases the degree of freedom in the arrangement of the equipment, thereby limiting the space. It is easy to apply to many buildings. Similarly, it is also possible to divide the transformer 13 and the secondary switch 14 stored in the transformer board 18 into two.

또 본 실시예에 있어서는, 각 변압기장치(11)를 각 층에 설치할 때에는 진공절연에 의한 1차 개폐기(12a 내지 12c)와 변압기(13)를 일체화하여 각 층에 배치 함으로써 설치공간을 줄일 수도 있다.In the present embodiment, when installing each transformer device 11 on each floor, the installation space can be reduced by integrating the primary switch 12a to 12c and the transformer 13 by vacuum insulation on each floor. .

또 상기 실시형태에 있어서는, 전기실(4)이나 변압기장치(11)를 빌딩의 어느 한 층에 설치하는 것에 대하여 설명하였으나, 공장 등의 구조 내에 분산되어 배치된 복수의 건물 중 어느 하나의 건물에 전기실(4)과 변압기장치(11)를 분산하여 배치할 수도 있다.In the above embodiment, the installation of the electrical chamber 4 or the transformer device 11 on one floor of the building has been described. However, the electrical chamber is installed in any one of a plurality of buildings distributed and arranged in a structure such as a factory. (4) and the transformer device 11 may be distributed.

본 발명에 의하면 배전에 따르는 전력손실을 저감할 수 있음과 동시에, 전기실의 설치면적을 작게 할 수 있다.According to the present invention, power loss due to distribution can be reduced, and the installation area of the electrical chamber can be reduced.

Claims

A power switchgear disposed in an electric chamber and receiving power from a power distribution system, and a plurality of power switchboards which receive power from the power switch through a power cable and distribute the power to a load;

And the plurality of switchgear comprises a transformer for stepping down the voltage applied to the power cable and outputting the voltage to the load.

A plurality of main power switchgear each receiving power from a plurality of lines of a distribution system, and the main power switchgear are arranged in an electrical room to transfer power from the output of the main power switchgear to different power cables A plurality of auxiliary switchgear outputs and a plurality of switchboards which receive power from each of the auxiliary switchgear through any one of the power cables and distribute the power to the load;

A plurality of main power switchgear for receiving electric power from a plurality of lines of a distribution system, a plurality of auxiliary power switchgear for outputting power from the outputs of the main power switchgear to different power cables, and the plurality of An electrical chamber for housing the main power supply switch and the plurality of auxiliary power supply switches, and a plurality of switchboards for receiving power from each of the auxiliary power supply switches through the power cable and distributing them to the load.

The plurality of switchgear includes a transformer for stepping down the voltage applied to the power cable and outputting the voltage to the load, wherein the electrical chamber and the switchgear are distributed in one of a plurality of layers constituting a building. Water substation equipment characterized in that.

A plurality of main power switchgear for receiving electric power from a plurality of lines of a distribution system, a plurality of auxiliary power switchgear for outputting power from the outputs of the main power switchgear to different power cables, and the plurality of An electrical chamber for housing the main power supply switch and the plurality of auxiliary power supply switchgear, and a plurality of switchboards for receiving power from each of the auxiliary power supply switchgear through the power cable and distributing the load to the load;

The plurality of switchboards includes a transformer for stepping down the voltage applied to the power cable and outputting the voltage to the load, and distributing the electrical room and the switchboards in any one of a plurality of buildings distributed and arranged in a structure. Water substation equipment characterized in that made.

The method according to any one of claims 2 to 4,

Power cables connected to each of the auxiliary receiving switch is connected in series with each other, the water substation facility characterized in that to form a loop circuit with each of the auxiliary receiving switch.

The method according to any one of claims 2 to 4,

The switchgear includes a plurality of primary switches connected to any one of the power cables, and the plurality of primary switches include a first primary switch and a plurality of primary switches inserted in the power cable and connected in series with each other. And a third primary switch, inserted into a circuit connecting the transformer and a connection point between the first primary switch and the second primary switch and the transformer, wherein each of the auxiliary And the power cables connected to the switch are connected in series to each other to form a loop circuit together with the auxiliary switchgears.

The method according to any one of claims 1 to 4,

The switchgear comprises a plurality of primary switches connected to any one of the power cables, and the plurality of primary switches comprises a vacuum insulated switchgear.

The method according to any one of claims 1 to 4,

The transformer is a water substation facility, characterized in that consisting of a silicon oil insulation transformer insulated with silicon oil.

The method according to any one of claims 1 to 4,

The transformer is a water substation facility, characterized in that consisting of an epoxy mold insulation transformer insulated with an epoxy resin mold.

The method according to any one of claims 1 to 4,

The transformer includes an iron core and a primary coil and a secondary coil disposed around the iron core, and the iron core, the primary coil, and the secondary coil are configured to be splittable. .