KR200420240Y1 - Hydroelectric Power Plant's Bus having Automatic Power Factor Control Unit - Google Patents

Hydroelectric Power Plant's Bus having Automatic Power Factor Control Unit Download PDF

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KR200420240Y1
KR200420240Y1 KR2020060009287U KR20060009287U KR200420240Y1 KR 200420240 Y1 KR200420240 Y1 KR 200420240Y1 KR 2020060009287 U KR2020060009287 U KR 2020060009287U KR 20060009287 U KR20060009287 U KR 20060009287U KR 200420240 Y1 KR200420240 Y1 KR 200420240Y1
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power
power factor
factor control
control device
transformer
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KR2020060009287U
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Korean (ko)
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박종제
이준수
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한국서부발전 주식회사
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/70—Regulating power factor; Regulating reactive current or power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
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  • Automation & Control Theory (AREA)
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  • Supply And Distribution Of Alternating Current (AREA)

Abstract

본 고안은 발전소 내의 모선 내에 역률 제어장치를 설치하여 전력의 효율을 높이고 장치의 오동작을 방지하여 수명을 연장하는 자동역률 제어장치를 갖는 발전소의 모선에 관한 것이다.The present invention relates to a power plant busbar having an automatic power factor control device that extends the lifespan by increasing the power efficiency by preventing power supply malfunction by installing a power factor control device in a busbar in the power plant.

본 고안에 따르는 자동역률 제어장치를 갖는 발전소의 모선은, 모선의 고압수전단 인입측에 설치된 자동역률 제어장치와 모선의 저압 수전용 변압기 인입측에 설치된 저압단 자동역률 제어장치 및 모선의 내부 부하(모터) 말단에 설치된 진상콘덴서인 자동역률 제어장치를 포함한다.The busbar of the power plant having the automatic power factor control device according to the present invention has an automatic power factor control device installed on the inlet side of the high voltage power terminal and a low voltage stage automatic power factor control device installed on the inlet side of the low voltage power transformer of the busbar and the internal load of the busbar. It includes an automatic power factor control device which is a fastening capacitor installed at the end of the (motor).

즉, 발전소 내 모선의 역률을 개선하여 변압기 부하손실(동손)을 저감하고 전압변동률을 개선하여 기기의 수명연장과 저소음, 소내전력 절감하며 수전설비의 유효 여유용량 및 손실전력 감소로 인해 변압기에서 다량의 유효전력을 얻을 수 있는 효과가 있으며, 부하 말단에 역률 개선용 전력 콘덴서를 병렬접속하면 전류의 제곱에 비례하여 발생되는 부하 전선로의 저항손실이 저감하고 모터 부하의 입력이 개선되어 효율 향상되며 콘덴서의 필터링 효과로 현저한 고조파에 의한 계전기류의 오작동을 방지하는 효과를 제공한다.In other words, by improving the power factor of the bus in the power plant, the transformer load loss (copper loss) is reduced, and the voltage fluctuation rate is improved, thus extending the service life of the equipment, low noise, low power consumption, and large amount of transformer in the transformer due to the reduction of effective spare capacity and loss power of the power receiving equipment Effective power can be obtained, and if the power capacitor for power factor improvement is connected in parallel at the load end, the resistance loss of the load line generated in proportion to the square of the current is reduced and the input of the motor load is improved to improve the efficiency. Its filtering effect provides the effect of preventing the malfunction of relays due to significant harmonics.

발전소, 고저압 모선, 고저압 수전단, 고압 수전용 변압기, 역률 제어장치 Power plants, high and low voltage busbars, high and low voltage switchgear, high voltage transformers, power factor controller

Description

자동역률 제어장치를 갖는 발전소의 모선{Hydroelectric Power Plant's Bus having Automatic Power Factor Control Unit}Hydroelectric Power Plant's Bus having Automatic Power Factor Control Unit

도 1은 본 고안의 실시예에 따른 발전소의 모선의 구성을 도시한다.1 shows a configuration of a bus bar of a power plant according to an embodiment of the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1: 발전소의 모선(Bus) 2: 기동용 변압기1: Bus of power plant (Bus) 2: Starting transformer

3: 각호기 Auxilary Transformer 4: 각호기 Power Center Transformer3: Units Auxilary Transformer 4: Units Power Center Transformer

5: 고압단 자동역률 제어장치 6: 저압단 자동역률 제어장치5: High Pressure Automatic Power Factor Control 6: Low Pressure Automatic Power Factor Control

본 고안은 자동역률 제어장치를 갖는 발전소의 모선으로서, 더욱 상세하게는 발전소 내의 모선의 고압 수전단과 저압 수전단 및 각 부하의 말단에 자동역률 제어장치를 설치하여 소비전력을 절감하는 자동역률 제어장치를 갖는 발전소의 모선에 관한 것이다.The present invention is a mother bus of a power plant having an automatic power factor control device, and more specifically, an automatic power factor control that reduces power consumption by installing an automatic power factor control device at the ends of each load and a high-voltage receiver and a low-voltage receiver of a bus in a power plant. It relates to a mother bus of a power plant having a device.

최근 들어, 세계적으로 화석연료 고갈에 따라 에너지 비용이 증가하는 추세이며, 에너지 부존국가에서는 에너지의 효율을 높이기 위한 방안이 지속적으로 개발, 진행되고 있다. 이에 따라 국내에서도 이러한 노력의 일환으로 ESCO사업을 전 개하여 에너지 부존국가로써 에너지 소비율을 낮추어 국가 경쟁력 확보하기 위한 정책적인 노력이 계속되고 있다.In recent years, energy costs are on the rise due to the depletion of fossil fuels. In countries with no energy, measures to improve energy efficiency have been continuously developed. Accordingly, as part of such efforts in Korea, policy efforts are being made to secure national competitiveness by lowering energy consumption as an energy-free country by developing ESCO projects.

종래의 발전소의 소내부하 운전은 소내 부하가 모두 고, 저압 대용량의 유도전동기로 구성되며, 초기 모터 설계시 정격보다 여유율이 높게 제작되어 있어 가변부하나 부분부하 운전이 아니더라도 부하율이 낮아 효율 및 역률이 낮게 운전되고 있어 저부하, 저역률 운전시 효율저하 및 전력소비가 크다는 문제점이 있었다. 또한, 소내 보조기기는 고, 저압 대용량의 유도전동기로 구성되어 있고, 이는 유도성 부하의 특성인 무효전력의 발생원으로 소내전력계통의 역률을 떨어뜨리고, 그로 인하여 허용치 이내지만 소내전압강하 및 전압변동률을 증가시키고 있고 소내 소비전력량이 증가하는 문제가 있었다.The on-load operation of a conventional power plant is composed of all of the on-load load, low-voltage large-capacity induction motor, and the margin ratio is higher than the rated motor design at the initial motor design. There is a problem that the operation is low, low efficiency, high power consumption and low power consumption during low power factor operation. In-house auxiliary equipment is composed of high and low voltage large capacity induction motor, which is a source of reactive power, which is characteristic of inductive load, and reduces the power factor of the on-site power system, thereby reducing the on-site voltage drop and voltage fluctuation rate. There was a problem that increases the amount of power consumption in the house.

본 고안은 전술한 바와 같은 점에 착안하여 창출된 것으로서, 발전소 내의 모선의 가변부하와 부분부하의 역률을 개선하여 부하율을 높임으로써 전력효율을 증가시키고 이에 따라, 에너지손실을 감소키는 자동역률 제어장치를 제공하는 것을 목적으로 한다.The present invention was created based on the above-described points, and the automatic power factor control increases power efficiency by improving the power factor of the variable load and the partial load of the bus in the power plant, thereby increasing the power efficiency and thus reducing the energy loss. It is an object to provide a device.

전술한 바와 같은 목적을 달성하기 위한 본 고안의 자동역률 제어장치를 갖는 발전소의 모선으로써, 발전소 내의 모선의 가변부하와 부분부하의 역률을 개선하여 부하율을 높임으로써 전력효율을 증가시키고 이에 따라, 에너지손실을 감소키는 자동역률 제어장치를 제공하는 것을 특징으로 한다.As a bus of a power plant having an automatic power factor control device of the present invention for achieving the object as described above, by improving the power factor of the variable load and the partial load of the bus bar in the power plant to increase the load rate to increase the power efficiency and accordingly, It is characterized by providing an automatic power factor control device for reducing losses.

본 고안의 바람직한 특징에 따르면, 발전소 내의 모선에 있어서, 모선의 6.9kV의 고압수전단 인입측의 1차 측에 병렬설치된 진상콘덴서(Static Condenser)인 고압단 자동역률 제어장치 및 모선의 460V의 저압 수전용 변압기 인입측의 1차 측에 병렬설치된 진상콘덴서인 저압단 자동역률 제어장치를 포함하는 것을 특징으로 한다.According to a preferred feature of the present invention, in a bus in a power plant, a high-voltage stage automatic power factor control device, which is a static condenser installed in parallel on the primary side of the 6.9 kV high-voltage power supply inlet side of the bus, and a low voltage of 460 V of the bus It characterized in that it comprises a low-pressure automatic power factor control device which is a phase advance capacitor installed in parallel on the primary side of the transformer transformer inlet side.

또한, 모선의 내부 부하 말단에 병렬로 진상콘덴서를 설치하여 역률을 개선하는 것을 특징으로 한다.In addition, it is characterized in that the power factor is improved by installing a fastening capacitor in parallel at the end of the internal load of the bus.

이하, 이상과 같은 구성요소 들을 포함하여 이루어진 본 고안의 바람직한 실시 예를 첨부 도면을 통하여 보다 구체적으로 살펴본다.Hereinafter, a preferred embodiment of the present invention including the above components will be described in more detail with reference to the accompanying drawings.

도 1은 본 고안의 실시예에 따른 발전소의 모선(1)의 구성을 도시한다.1 shows a configuration of a busbar 1 of a power plant according to an embodiment of the present invention.

도 1을 참조하면, 발전소의 모선(1)은 기동용 변압기(Start Up Transformer, 고압단)(2), 각호기 Auxilary Transformer(고압단)(3), 각호기 Power Center Transformer(저압단)(4)와 고압단 자동역률 제어장치(5) 및 저압단 자동역률 제어장치(6)로 구성된다.Referring to Figure 1, the busbar 1 of the power plant is a Start Up Transformer (high pressure stage) (2), each unit Auxilary Transformer (high pressure stage) (3), each unit Power Center Transformer (low voltage stage) ( 4) and a high pressure automatic power factor control device 5 and a low pressure automatic power factor control device 6.

고압 및 저압의 자동역률 제어장치(5, 6)는 수변전 설비에 병렬로 접속하여 역률을 개선할 목적으로 설치되며, 전압과 전류의 위상차에 의한 지상 무효전력을 개선해주기 위해 진상콘덴서(Static Condenser)가 사용된다. Automatic power factor control devices (5, 6) of high and low pressure are installed for the purpose of improving the power factor by connecting them in parallel to the water substation facilities, and the static condenser to improve the ground reactive power by the phase difference between voltage and current. ) Is used.

따라서, 6.9KV의 기동용 변압기(2)의 인입측에 고압단 자동역률 제어장치(5)를 병렬로 설치하고, 460V의 저압수전단(4)의 인입측에 저압단 자동역률 제어장치(6)를 병렬로 설치한다. 즉, 기동용 변압기(2) 고압단 자동역률 제어장치(5)는 고압 수전단의 1차측(6.9kV Common BUS 인입측 브레이커 1차측)에 설치되어, 기동용 변압기(2)의 부하손실 감소와 유효 여유용량 이득을 발생시키고 소내 전압강하를 저감하며 변압기 1차 측의 역률 개선으로 피상전력(kVA)이 감소하여 이용률이 향상된다. 또한, Q = 2πfCV²[kVA] 이므로 전압이 높을수록 설치용 콘덴서는 소형화되어 1상당 콘덴서 설치비용 저렴하다. 각호기 Auxilary Transformer(4)의 인입측에 저압단 자동역률 제어장치(6)는 저압 수전단의 1차측(각 460V 인입측 브래이커 1차측)에 설치되어 역률개선 효과가 부하를 제외한 고압측과 저압측 모두에 적용되고 피상전력 감소에 의한 수전설비의 이용률 향상된다. 또한, 자동역률 제어장치에는 차단기가 설치되어 사용을 조절한다.Therefore, the high-voltage stage automatic power factor control device 5 is provided in parallel on the inlet side of the 6.9 KV starting transformer 2, and the low-voltage stage automatic power factor control unit 6 is provided on the inlet side of the 460 V low-pressure power stage 4. ) In parallel. That is, the high voltage stage automatic power factor control device 5 of the starting transformer 2 is installed on the primary side (6.9 kV Common BUS inlet side breaker primary side) of the high voltage receiving stage, thereby reducing the load loss of the starting transformer 2 and The utilization rate is improved by generating the effective margin gain, reducing the voltage drop in the field, and reducing the apparent power (kVA) by improving the power factor of the transformer primary side. In addition, since Q = 2πfCV² [kVA], the higher the voltage, the smaller the capacitor for installation and the lower the cost of capacitor installation per phase. Low voltage stage automatic power factor control device 6 is installed on the inlet side of each Auxilary Transformer 4 on the primary side (each 460V inlet side breaker primary side) of the low voltage receiving stage, so that the power factor improvement effect is higher than the load side. It is applied to both the low pressure side and the utilization rate of power receiving equipment is improved by reducing the apparent power. In addition, the automatic power factor control unit is provided with a breaker to control the use.

바람직하게 소내 부하(예컨대, 모터 등의 장치)의 말단에도 자동역률 제어장치인 진상콘덴서(Static Condenser)를 설치하여 역률개선 효과를 극대화할 수 있다.Preferably, the power factor improvement effect may be maximized by installing a static condenser, which is an automatic power factor control device, at the end of the on-site load (eg, a device such as a motor).

또한, 차단기(CB 1 ~ CB 13)는 모선(1)에 장착되어 기동용 변압기(2)과 각호기 Auxilary Transformer(3)와 각호기 Power Center Transformer(4)에 이상 고압발생시 차단하는 역할을 한다.In addition, the breaker (CB 1 ~ CB 13) is mounted on the bus (1) serves to cut off the abnormal high voltage generated in the starting transformer (2), each unit Auxilary Transformer (3) and each unit Power Center Transformer (4). .

상술한 바와 같이, 본 고안에 따른 자동역률 제어장치를 갖는 발전소의 모선의 실시예가 구성된다. 본 고안은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 고안은 이것에 의해 한정되지 않으며 본 고안이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 고안의 기술사상과 아래에 기재될 특허청구범위의 균등범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.As described above, an embodiment of a busbar of a power plant having an automatic power factor control apparatus according to the present invention is configured. Although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and claims to be described below by those skilled in the art to which the present invention belongs. Of course, various modifications and variations are possible within the scope of equivalents.

본 고안에 따른 자동역률 제어장치를 갖는 발전소의 모선은, 발전소 내 모선의 역률을 개선하여 변압기 부하손실(동손)을 저감하고 전압변동률을 개선하여 기기의 수명연장과 저소음, 소내전력 절감하며 수전설비의 유효 여유용량 및 손실전력 감소로 인해 변압기에서 다량의 유효전력을 얻을 수 있는 효과가 있다.The busbar of the power plant having the automatic power factor control device according to the present invention improves the power factor of the busbar in the power plant, thereby reducing the transformer load loss (copper loss) and improving the voltage fluctuation rate, thus extending the life of the device and reducing the noise, power consumption, and receiving power. Due to the reduction of the effective spare capacity and the loss power, a large amount of active power can be obtained from the transformer.

또한, 부하 말단에 역률 개선용 전력 콘덴서를 병렬접속하면 전류의 제곱에 비례하여 발생되는 부하 전선로의 저항손실이 저감하고 모터 부하의 입력이 개선되어 효율 향상되며 콘덴서의 필터링 효과로 현저한 고조파에 의한 계전기류의 오작동을 방지하는 효과가 있다.In addition, parallel connection of power capacitor for power factor improvement at the load end reduces the resistance loss of the load line generated in proportion to the square of the current, improves the input of the motor load, improves efficiency, and relays due to significant harmonics due to filtering effect of the capacitor. It is effective in preventing malfunctions of oils.

Claims (2)

발전소 내의 모선(1)에 있어서, 상기 모선(1)의 6.9kV 기동용 변압기(2) 인입측에 1차 측에 병렬설치된 진상콘덴서(Static Condenser)인 고압단 자동역률 제어장치(5) 및 상기 모선(1)의 460V 각호기 Power Center Transformer(4) 인입측의 1차 측에 병렬설치된 진상콘덴서인 저압단 자동역률 제어장치(6)를 포함하는 것을 특징으로 하는 자동역률 제어장치를 갖는 발전소의 모선.In the bus (1) in the power plant, the high-voltage stage automatic power factor control device (5) which is a static condenser installed in parallel on the primary side on the inlet side of the 6.9 kV starting transformer (2) of the bus (1) and the Of a power plant having an automatic power factor control device comprising a low pressure stage automatic power factor control device (6) which is a phase condenser installed in parallel on the primary side of the 460V power unit Transformer (4) of the bus line (1). bus. 제 1항에 있어서, 상기 모선(1)의 내부 부하 말단에 진상콘덴서를 설치하여 역률을 개선하는 것을 특징으로 하는 자동역률 제어장치를 갖는 발전소의 모선.2. The busbar of a power plant having an automatic power factor control device according to claim 1, wherein a power condenser is installed at an end of an internal load of the bus bar to improve the power factor.
KR2020060009287U 2006-04-07 2006-04-07 Hydroelectric Power Plant's Bus having Automatic Power Factor Control Unit KR200420240Y1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100974327B1 (en) * 2008-03-07 2010-08-06 한국중부발전(주) Power Plant No Load Start-up Transformer Power Factor Compensation System
KR101545476B1 (en) * 2014-12-11 2015-08-19 (주)파워닉스 Power saving system and method in power plant using static var compensator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100974327B1 (en) * 2008-03-07 2010-08-06 한국중부발전(주) Power Plant No Load Start-up Transformer Power Factor Compensation System
KR101545476B1 (en) * 2014-12-11 2015-08-19 (주)파워닉스 Power saving system and method in power plant using static var compensator

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