WO2010059014A2 - Tableau de distribution avec transformateur pour panneau - Google Patents

Tableau de distribution avec transformateur pour panneau Download PDF

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Publication number
WO2010059014A2
WO2010059014A2 PCT/KR2009/006936 KR2009006936W WO2010059014A2 WO 2010059014 A2 WO2010059014 A2 WO 2010059014A2 KR 2009006936 W KR2009006936 W KR 2009006936W WO 2010059014 A2 WO2010059014 A2 WO 2010059014A2
Authority
WO
WIPO (PCT)
Prior art keywords
transformer
low voltage
panel
load
circuit breaker
Prior art date
Application number
PCT/KR2009/006936
Other languages
English (en)
Korean (ko)
Other versions
WO2010059014A3 (fr
Inventor
정운태
Original Assignee
Chung Woon Tae
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chung Woon Tae filed Critical Chung Woon Tae
Publication of WO2010059014A2 publication Critical patent/WO2010059014A2/fr
Publication of WO2010059014A3 publication Critical patent/WO2010059014A3/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/30—Staggered disconnection

Definitions

  • the present invention relates to a panel transformer switchgear, and more particularly, in a panel transformer switchgear for supplying a load by lowering it from ultra high pressure or extra high pressure to high pressure or low pressure, the panel transformer having the same load characteristics regardless of the transformer type and capacity. Accordingly, the present invention relates to a panel transformer switchgear capable of automatically controlling the number of driving units to reduce load and no load loss.
  • the transformer capacity is calculated in consideration of the building power load density table and the building floor area, and then the standard capacity is calculated using the transformer standard capacity calculation table. 3, 5, 7.5, 10, 15, 20, 30, 50, 75, 100 (KVA), whether single phase or three phase. ... Although it is standardized by a customer, it is possible to purchase and install any non-standard product according to the demand of the customer.
  • the specific capacity of the transformer can be used to determine whether Even if it is calculated, the devices used in the building, such as electric lights, computers, washing machines, and small power equipment, are composed of high efficiency devices these days, and when the capacity of the transformer is excessive, one of them or at least parallel operation is performed. In order to reduce the losses, parallel operation was practically difficult due to different transformer capacity and load characteristics.
  • FIG. 1 is a view showing an embodiment of a disconnection diagram according to the prior art, which will be described below with reference to the description of the reference numerals of the main parts of the drawings.
  • an interlook is set between a light load transformer, a power load transformer, and a computer load transformer 30, and a tie van is installed.
  • the faulty transformer is separated from the track, and then the interlock is artificially released, and then the low voltage circuit breaker 246 is input to load the load on the faulty transformer together with other transformers to install the load for temporary use.
  • an object of the present invention is to install a plurality of panel transformer having the same load characteristics irrespective of type or capacity, current transformer for sensing the amount of load current
  • the average load is 70 (%) when the panel transformer logarithmic control operation under heavy load is installed.
  • the power transformer is 30 (%) and the computer transformer is 40 (%), all of them are operated in parallel or if the load is reduced, only one unit is operated to reduce the load and no load loss. It aims to provide.
  • the breaking capacity of the low voltage circuit breakers installed in the load stage is increased by the number of transformers operated in parallel. It is an object of the present invention to provide a panel transformer switchgear that can facilitate selection of the load side breaker by reducing the breaking capacity by operating the tie-ban breaker before other breakers to increase the line impedance by separating the lines. .
  • the present invention when calculating the transformer capacity of the consumer in the design stage, when calculated as three, such as electric light transformer, power transformer, computer transformer, etc., the installation of the transformer to prevent the load characteristics and installation area and voltage fluctuation or harmonic generation of the customer
  • the present invention when calculated as three, such as electric light transformer, power transformer, computer transformer, etc., the installation of the transformer to prevent the load characteristics and installation area and voltage fluctuation or harmonic generation of the customer
  • customers who have already installed and used transformers can replace the old or oversized transformers with high-efficiency transformers to carry out energy saving projects (ESCO).
  • Another object is to provide a panel transformer switchgear with adjustable number of installations.
  • Panel transformer switchgear for realizing the above object is a high-voltage power circuit breaker connected to the high-voltage power source that is drawn from the outside, the high-voltage power supply is passed through the branch high-voltage circuit breaker is pulled down to low voltage power supply
  • a panel transformer comprising a transformer for supplying electric power to a load side, a low voltage circuit breaker and a low voltage cable installed at the low voltage side of the transformer, and a low voltage circuit breaker for connecting or disconnecting the low voltage power drawn from the transformer to the load;
  • a plurality of panel transformer units connected to the transformer and the low voltage circuit breaker forming a high voltage circuit breaker and a panel transformer to supply or cut off power to the transformer;
  • a low voltage distribution panel connected to a low voltage power supply drawn by a low voltage breaker of each panel transformer forming the panel transformer;
  • a current transformer installed on the high and low voltage blocking base to sense an amount of load current flowing through a cable connected to the high and low voltage breakers;
  • a control unit for
  • the energy saving project is carried out by adjusting the installed capacity and quantity of the transformer, and selecting the capacity and number of transformers with the least loss for the customer.
  • a controller using a general computer, a power protection monitoring device, a concentrated display device, a protocol converter, or the like, or a maximum demand meter (DEMAND METER), which is commercially available in the market may be configured with a preset current value detected by the current transformer. It is to perform the function of separating or connecting the transformer from the line by controlling the circuit breakers before and after the transformer compared with the reference value.
  • the high-voltage circuit breaker includes an air circuit breaker that connects or cuts off the secondary low voltage power supply of the transformer.
  • the transformer is composed of a single phase or three phase, and even if the transformer capacity is different, it has the same load characteristics.
  • the load characteristic is that the polarity, the primary and secondary voltage, the ratio of resistance and reactance, the angular displacement, the phase rotation direction, the impedance voltage has the same characteristics.
  • Another desirable feature of the present invention is to install transformers according to the past load types and uses in consideration of the effects of harmonics or voltage fluctuations generated in the load on other loads, but the above elements can be suppressed by increasing the transformer capacity. Therefore, it is desirable to increase the transformer capacity whenever possible.
  • a tievan is installed and a separate current transformer is installed at the load stage. If the detected current is more than a certain value by operating the tie breaker before other breakers, if the line is separated, the short-circuit current supply is reduced, the line impedance is doubled, and the short-circuit current is reduced by half.
  • Advantages It is desirable to apply a system separation scheme to facilitate interruption.
  • the load loss increases at light load, resulting in an increase in the overall electric charge. It is desirable to select the transformer type and capacity in consideration of the load factor of the power factor to contribute to reducing the power loss of the customer.
  • the panel transformer unit is connected in parallel with a plurality of high-voltage power introduced from the outside, or branched from the high-voltage power supply drawn from the high-voltage circuit breaker for receiving.
  • the panel transformer switchgear according to the present invention has the effect of reducing the electric charge by reducing the load loss or no load loss by installing a plurality of panel transformer switchgear having the same load characteristics.
  • the remaining capacity of the transformer, or the power used in different time zones i.e., a lot of load in the morning in a business hotel, and a lot of load in the evening time in a general hotel
  • the low-load consumer panel transformer is separated from the line, and the high-load consumer panel transformer is put on the line, allowing balanced distribution of power in KEPCO, thus saving additional installation costs for KEPCO transmission and distribution lines. It can be effective.
  • a plurality of consumers of a certain size or more that is, a general lamp, a heat transformer, an emergency light, a heat transformer, a computer transformer, a power transformer 1/2, a cooling transformer, a landscape and stage lighting transformer, a stage sound and a mechanical and visual transformer
  • a general lamp a heat transformer, an emergency light
  • a heat transformer a computer transformer
  • a power transformer 1/2 a cooling transformer
  • a landscape and stage lighting transformer a stage sound and a mechanical and visual transformer
  • the transformer when the transformer is operated in parallel, impedance is reduced, voltage fluctuations are suppressed, and the voltage and frequency are constant, that is, the effect of supplying high-quality power to the load, which extends the life of various high-tech devices sensitive to noise, surge and voltage fluctuations. It is effective.
  • the panel transformer of the customer with less load is separated from the line, and the short circuit capacity is reduced, so that the operation responsibility of the breaker of the KEPCO transmission line is easy, so that the KEPCO breaker circuit breaker is reliably shut off in the past 2003. It has the effect of preventing a major blackout, such as that caused in the US in August.
  • FIG. 1 is a diagram showing a disconnection connection diagram according to the prior art
  • FIG. 2 is a representative disconnection wire diagram for installing a panel transformer capable of parallel operation according to an embodiment of the present invention
  • FIG. 3 is a disconnection diagram showing a modified embodiment of FIG. 2 with a panel transformer capable of parallel operation;
  • Figure 4 is a disconnection diagram according to an embodiment of the present invention to reduce the installation area and the installation cost, and to install a tie-down in preparation for the occurrence of a short circuit and ground fault in consideration of the low-voltage circuit protection method to break the failure section Disconnected wiring diagram showing a modified embodiment of Figure 2 applying a system separation method to easily block,
  • FIG. 5 is a disconnection diagram for supplying stable power to a load by operating in parallel according to the voltage according to the present invention.
  • FIG. 6 is a disconnection diagram illustrating a modified embodiment of FIG. 2 in which a transformer is separately installed so as not to be influenced by noise and surge caused by a panel transformer in a slight manner.
  • FIG. 6 is a disconnection diagram illustrating a modified embodiment of FIG. 2 in which a transformer is separately installed so as not to be influenced by noise and surge caused by a panel transformer in a slight manner.
  • FIG. 2 is a diagram illustrating a disconnection connection diagram including a panel transformer switchgear according to an exemplary embodiment of the present invention.
  • the panel transformer A is composed of a transformer 130 and a low voltage circuit breaker 146.
  • the panel transformer A has a load characteristic even if the transformer 130 has a capacity or a different capacity. Is characterized by having the same.
  • the same load characteristics means that even transformers with different capacity can be operated in parallel.
  • the load characteristics must be the same.
  • the load characteristics for parallel operation that is, polarity ( )
  • the primary and secondary voltage, the ratio of resistance and reactance, the angular displacement, the phase rotation direction, and the impedance voltage should be the same, but in the case of impedance voltage, the ratio (%) to the rated voltage is called percent impedance voltage.
  • the term panel transformer (A) includes a low voltage circuit breaker 146 at the load stage for the purpose of understanding, or a transformer 130 capable of parallel operation having the same load characteristics. It is defined as
  • the panel transformer A may be implemented by a general transformer 130 that is commercially available, that is, a known technique.
  • the high voltage circuit breaker 120-1 may be used as a gas circuit breaker or a vacuum circuit breaker, a gas circuit breaker or a vacuum circuit breaker may also be used as a branch high pressure circuit breaker, and as a low pressure circuit breaker 146, 147, a general air circuit breaker.
  • a circuit breaker or a magnetic circuit breaker may be used, but when the secondary voltage of the transformer is high, that is, as shown in FIG. 5, the circuit breaker 1200 such as the primary side may be used as the secondary circuit breaker 120 of the transformer 1300. ) Can be used.
  • the three panel transformer 130 is a high efficiency low noise transformer (laser mold transformer,% Z (mean% impedance) equal, less than, equal to the total loss) 1,000, 1,250, 750 ( KVA)
  • laser mold transformer,% Z (mean% impedance) equal, less than, equal to the total loss
  • KVA KVA
  • (KW / H) x 3 units will be 8.835 (KW / H) and the total loss will be 79.515 (KW / 9H). 1.777 (KW / H) The net total will be 26.655 (KW / 15H), and the total daily loss will be 106.17 (KW / day).
  • the annual calculation will include 250 out of 365 days as 115 working days and public holidays and loads outside of working hours.
  • the annual loss is 31,446 (KWH / year), and the annual energy savings is 19,691 (KWH / year).
  • the average load of three transformers is 45.834 (%) during working hours, and 2.713 (KW / H) x 3 is 8.139 (KW / H), and the total loss is 73.251 (KW / 9H), and there is little load outside working hours, so if you drive only one, it will load 18.5 (%) and the loss will be 0.986 (KW / H), and the total loss will be 14.79 (KW / 15H). If the total daily loss is 88.4 (KW / day), and the year is calculated, 250 days are 365 working days and 115 days are public holidays.
  • the energy saving principle as described above reduces the power conversion loss generated during power conversion by lowering the average load ratio in parallel operation by using the principle that the load loss generated in the transformer increases or decreases in proportion to the square of the load current. It is a principle to save energy by controlling the operation number of transformer by using the characteristic of saturation magnetic flux density.
  • Figure 3 is a preferred embodiment according to the present invention when the load increase of the customer is not expected, or if some load is expected to be closed in the future, or because the current transformer utilization rate is low in Korea, there is a lot of room for the purpose of reducing losses
  • the transformer capacity is 3,000 (KVA)
  • KVA 750, 750, 750, 750
  • the tievan may be installed, and in this case, the low voltage circuit breaker 246 for the tievan may be installed considering at least the capacity of two transformers operated in parallel.
  • KVA 4 is the sum of the capacity of the electric light, power, computer load transformer 30 is 3,000 (KVA), so it is installed as 1,500 (KVA) x 2, the electric equipment of the existing consumer as shown in Figure 1 energy saving business This is an example of how to apply it.
  • Figure 5 is an embodiment of the present invention is a commercially available transformer is a two-wound transformer, that is, a two-wound transformer (1400) having two primary and secondary windings occupy most of the large-scale faucet facilities, that is, large-scale intelligence
  • the high-voltage (154KV, 345KV) voltage received from KEPCO is connected to a large-capacity faucet transformer, which is a high-capacity transformer that transforms the primary into 154 (KV), the secondary into 22.9 (KV), and the tertiary into 6.6 (KV).
  • the load received by KV) voltage is usually a large load such as a large capacity induction motor or a furnace. Close the outlet valve, check the transformer and equipment inside the panel for failures, and check the failure of many large motors, pumps, etc., and open the discharge valve to start the engine. Not only this, but it takes a long time for the tap water to be pressurized again and transported to the water purification plant normally, and it takes much more time for the purified water to go to the consumer. It is desirable to operate these power supplies in parallel to supply water without any problem even if one transformer breaks down.
  • two or more external receiving power and consumer transformers can be used in parallel operation for stable power supply rather than reducing load loss.
  • the parallel operation method using a high efficiency transformer is less loss and the facility cost and installation area are reduced than the transformer series operation method, it is preferable to install the system in parallel operation by applying this example from the time of installation of the facility.
  • the load of the transformer 131 is light load when parallel operation is possible
  • the air circuit breaker 146 is operated by releasing the interlock setting by a signal sent from the controller. It is preferable to use all of them in parallel operation to reduce the load loss.
  • two current transformers are preferably installed to detect bidirectional currents flowing to the left and right of the air circuit breaker 146 for setting the Tai-Ban inter look.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Patch Boards (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Distribution Board (AREA)

Abstract

La présente invention concerne un tableau de distribution avec un transformateur pour panneau, comprenant : un transformateur pour panneau, une pluralité d'unités de transformation pour panneau, une carte de distribution basse tension, un transformateur de courant et une unité de commande, le transformateur pour panneau comprenant un coupe-circuit haute tension pour une ligne électrique, un transformateur, et un coupe-circuit basse tension. Le coupe-circuit haute tension pour une ligne électrique est connecté à une puissance haute tension d'alimentation externe. Les amplificateurs de transformateur fournissent une puissance haute tension passant à travers des coupe-circuits de lignes électriques, et transforme une puissance haute tension en puissance basse tension pour alimenter en puissance une charge. Le coupe-circuit basse tension est connecté à un coupe-circuit inférieur et à un câble basse tension qui sont installés du côté basse tension du transformateur, et permet la connexion et la déconnexion de la basse tension alimentée à partir du transformateur à la charge. La pluralité d'unités de transformation pour panneau sont configurées par connexion avec les coupe-circuits haute et basse tension et le transformateur, le coupe-circuit haute tension alimentant et coupant la puissance du transformateur pour panneau. Le tableau de distribution basse tension est connecté à la puissance basse tension par des câbles basse tension, la puissance basse tension étant alimentée à partir du coupe-circuit basse tension de chaque transformateur pour panneau qui constitue l'unité de transformation pour panneau. Le transformateur de courant est installé au niveau des coupe-circuits haute et basse tension, et détecte la résistance du courant de charge s'écoulant dans le câble connecté aux coupe-circuits basse et aux tensions. L'unité de commande fait fonctionner les coupe-circuits haute et basse tension par comparaison de la résistance de courant détectée par le transformateur de courant avec une valeur de données standard préfixée pour permettre la connexion ou la déconnexion de chaque transformateur pour panneau avec la charge en fonction de la variation de charge. Par conséquent, l'unité de commande est capable de commander le nombre de transformateurs pour panneau opérationnels.
PCT/KR2009/006936 2008-11-24 2009-11-24 Tableau de distribution avec transformateur pour panneau WO2010059014A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2008-0117061 2008-11-24
KR1020080117061A KR20100058305A (ko) 2008-11-24 2008-11-24 패널변압기 배전반

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WO2010059014A2 true WO2010059014A2 (fr) 2010-05-27
WO2010059014A3 WO2010059014A3 (fr) 2010-09-10

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WO (1) WO2010059014A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101154232B1 (ko) * 2011-11-03 2012-06-07 정운태 톱러너 배전반의 설계방법
CN112578182A (zh) * 2020-11-26 2021-03-30 国网山东省电力公司枣庄供电公司 三相配电变压器谐波损耗带电测算方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001218309A (ja) * 2000-02-04 2001-08-10 Hitachi Ltd 配電盤
KR20040039880A (ko) * 2002-11-05 2004-05-12 주식회사 케이디파워 부하율 특성을 이용한 변압기 병렬 운전장치 및 그제어시스템
KR20060114640A (ko) * 2005-05-02 2006-11-07 정운태 패널변압기 내장형 배전반
KR100808944B1 (ko) * 2007-08-01 2008-03-04 주식회사 베스텍 자동부하분석기능을 갖는 수배전반 운전제어방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001218309A (ja) * 2000-02-04 2001-08-10 Hitachi Ltd 配電盤
KR20040039880A (ko) * 2002-11-05 2004-05-12 주식회사 케이디파워 부하율 특성을 이용한 변압기 병렬 운전장치 및 그제어시스템
KR20060114640A (ko) * 2005-05-02 2006-11-07 정운태 패널변압기 내장형 배전반
KR100808944B1 (ko) * 2007-08-01 2008-03-04 주식회사 베스텍 자동부하분석기능을 갖는 수배전반 운전제어방법

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KR20100058305A (ko) 2010-06-03
WO2010059014A3 (fr) 2010-09-10

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