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KR101314123B1 - Switchgear for controling peak using distributed generation of grid connected - Google Patents

Switchgear for controling peak using distributed generation of grid connected Download PDF

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Publication number
KR101314123B1
KR101314123B1 KR1020130086643A KR20130086643A KR101314123B1 KR 101314123 B1 KR101314123 B1 KR 101314123B1 KR 1020130086643 A KR1020130086643 A KR 1020130086643A KR 20130086643 A KR20130086643 A KR 20130086643A KR 101314123 B1 KR101314123 B1 KR 101314123B1
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South Korea
Prior art keywords
power
power supply
distributed
distributed power
emergency
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KR1020130086643A
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Korean (ko)
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문희봉
조영숙
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조영숙
오성기전주식회사
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    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H02J3/144—Demand-response operation of the power transmission or distribution network
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/62—The condition being non-electrical, e.g. temperature
    • H02J2310/64—The condition being economic, e.g. tariff based load management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/248—UPS systems or standby or emergency generators

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

Abstract

PURPOSE: A grid-connected peak control switchgear for a distribution power source is provided to reduce power rates by using the distribution power source when power consumption is increased. CONSTITUTION: An automatic integrated controller (100) receives an electrical pulse signal and continuously monitors a peak demand power value. The automatic integrated controller applies a control signal to a distribution power source (200) in the excess of the peak demand power value. The distribution power source and a power system of a power plant are operated in parallel. The automatic integrated controller cuts the peak demand power value by a parallel operation. [Reference numerals] (100) Automatic integrated controller (peak control, coupling, primary protection of system connection); (200) Distribution power source; (AA) Electric power corporation service cable; (BB) Digital complex relay for system connection; (CC) Power control system; (DD) Transformer #1; (EE) Transformer #2; (FF) Bypass high-speed circuit breaker; (GG) Transient reactor (use when necessary); (HH) General load low-tension panel #1; (II) General load low-tension panel #2; (JJ) Important (emergency) load low-tension panel

Description

계통연계형 분산전원용 피크제어 수배전반{SWITCHGEAR FOR CONTROLING PEAK USING DISTRIBUTED GENERATION OF GRID CONNECTED}Peak control switchgear for grid-connected distributed power supply {SWITCHGEAR FOR CONTROLING PEAK USING DISTRIBUTED GENERATION OF GRID CONNECTED}

본 발명은 계통연계형 분산전원(비상발전기, 가스터빈 동기발전기, 엔진구동 동기발전기, 연료전지 또는 전력저장장치 등)을 이용한 피크제어 수배전반 및 그 운전방법에 관한 것으로 더욱 상세하게는, 전력소비가 증가되는 시점에 분산전원을 활용하여 최대수요전력치(피크치)를 낮추(Peak Cut)어 전력요금을 절감시키는 기술에 관한 것이다.The present invention relates to a peak control switchgear using a grid-connected distributed power source (emergency generator, gas turbine synchronous generator, engine driven synchronous generator, fuel cell or power storage device, etc.), and more particularly, to consume power. The present invention relates to a technology that reduces the electric power bill by lowering the peak demand power (peak) by using distributed power at an increasing time point.

일정 규모 이상의 전기 수용가는 한전에서 전력을 수전하여 사용하는 데에 있어서 전력요금이 건물의 운영 및 공장운영 등에 크게 부담이 되는 것이 사실이다. 전력요금은 기본요금과 사용량요금으로 구성되는데, 하절기 및 동절기 등 전력 수요가 타 계절보다 증가되는 시기에는 전력사용량의 증가와 더불어 기본요금 부과의 근거가 되는 최대수요전력도 상승하게 된다.It is true that the electricity bill is a huge burden on the operation of the building and the operation of the plant when receiving electricity over a certain scale. The electricity bill consists of the basic fee and the usage fee. When the demand for electricity in summer and winter seasons is higher than in other seasons, the electricity consumption increases and the maximum demand power, which is the basis for the basic charges, also increases.

그러나, 일단 최대수요전력치를 한번이라도 상승하여 경신하게 되면 1년 동안 이 경신치로 기본요금을 적용받게 됨에 따라 전력요금 절감을 위해 다양한 노력이 뒤따르고 있다.However, once the maximum demand power value has been raised and renewed, various efforts have been made to reduce the power rate as the base rate is applied to the renewed value for one year.

현재는 대부분의 수용가에서 고가의 전력요금을 부담하거나, 이 피크치를 줄이기 위하여 부하의 우선순위를 정하여 인위적으로 일부 부하에 공급되는 전력을 차단하여 피크치를 줄이는 노력이 계속되고 있다. 그러나, 전력공급을 인위적으로 차단함에 따라 조업의 축소 및 많은 불편이 초래되는 문제점이 있다.At present, efforts are being made to reduce the peak value by most of the consumers paying an expensive power rate or by prioritizing the load to cut off the power artificially supplied to some loads in order to reduce the peak value. However, there is a problem that the reduction of the operation and a lot of inconvenience caused by artificially blocking the power supply.

대한민국 등록특허 제10-1157651호(피크시 발전기로 전원절체 가능한 최대수요전력 관리장치 및 그 제어방법)에는, 최대수요전력이 목표전력 이상인 경우, 발전기를 기동하도록 발전기 감시제어부를 제어하고, 자동전환스위치(ATS)가 발전기의 전원을 공급전원으로 선택하도록 ATS 감시제어부를 제어하고, 발전기의 전원으로 절체되어 복수의 부하를 운용하는 경우, 발전기가 비정상상태일 때, 발전기에 연결된 복수의 부하의 가동을 소정 순서에 의해 오프 하도록 부하 감시제어부를 제어하는 최대수요전력 관리장치에 기술이 개시되어 있다.In Korean Patent No. 10-1157651 (the maximum demand power management device capable of switching power to a peak generator and its control method), when the maximum demand power is higher than the target power, the generator supervisory control unit is controlled to start the generator, and is automatically switched. When the switch (ATS) controls the ATS supervisory control unit to select the power of the generator as the supply power, and switches to the power of the generator to operate a plurality of loads, when the generator is in an abnormal state, operation of the plurality of loads connected to the generator is performed. The technique is disclosed in the maximum demand power management device for controlling the load monitoring control unit to turn off the power in a predetermined order.

그러나, 전술한 선행특허의 경우, 회로 구조상 ATS측에 연결된 부하에만 발전 전력공급이 가능토록 구성되어있기 때문에 분산전원에서 발전되는 발전용량을 최대로 활용할 수가 없고, 또한 ATS 측에 부하가 안 걸렸을 경우에는 피크 컷을 목표한대로 제어할 수 없는 문제점이 있다.However, in the case of the above-described prior patent, since the power generation power supply is possible only to the load connected to the ATS side due to the circuit structure, it is impossible to maximize the generation capacity generated from the distributed power source, and the load is not applied to the ATS side. There is a problem that the peak cut cannot be controlled as intended.

본 발명의 목적은, 전력소비가 증가되는 시점에 각종 분산전원(비상발전기, 가스터빈 동기발전기, 엔진구동 동기발전기, 연료전지 또는 전력저장장치 등)을 활용하여 최대수요전력치(피크치)를 낮춤(Peak Cut)으로써, 전력요금을 절감시키는데 그 목적이 있다.An object of the present invention is to lower the maximum demand power (peak) by utilizing various distributed power sources (emergency generator, gas turbine synchronous generator, engine driven synchronous generator, fuel cell or power storage device, etc.) at the time when power consumption is increased. (Peak Cut), the purpose is to reduce the power bill.

또한, 본 발명의 목적은, 기존에 설치된 각종 분산전원 및 신설되는 분산전원에도 적용이 가능함으로써, 소비자의 부담을 최소화 할 수 있고 동시에 절체시 무정전으로 작동하므로 전력품질 유지에도 탁월한 피크제어 수배전반을 제공하는데 그 목적이 있다.In addition, the object of the present invention can be applied to a variety of existing distributed power supply and newly installed distributed power supply, thereby minimizing the burden on the consumer and at the same time operating uninterrupted during switching to provide an excellent peak control switchgear for maintaining the power quality Its purpose is to.

또한, 본 발명의 목적은, 한전계통 전원에 분산전원을 연계시켜 운전중에 한전전원이 불시에 정전이 되어도 고속차단기를 적용하여 순간전압강하에 민감한 중요부하 등에 허용순간전압강하 범위 내에서 무정전으로 전력을 계속적으로 공급하는데 그 목적이 있다.In addition, the object of the present invention is to connect a distributed power supply to the KEPCO system power supply, even if the KEPCO power supply is unexpectedly interrupted during operation, by applying a high-speed circuit breaker to the uninterruptible power supply within the allowable instantaneous voltage drop range, such as critical loads sensitive to instantaneous voltage drop The purpose is to continuously supply

또한, 분산전원을 계통에 연계시킬 경우 전기계통 단락 및 지락고장시에 분산전원에서 기여전류를 공급함으로써, 고장 전력계통에 연결된 각종 차단기류의 차단용량의 증가가 필요로 하는 경우, 분산전원의 간선말단에 한류 리액터를 적용하여 각종 차단기류의 차단용량 증가를 억제하는데 목적이 있다.In addition, when the distributed power supply is connected to the grid, the distributed current is supplied from the distributed power supply in case of short circuit or ground fault, so that the increase in the breaking capacity of various breakers connected to the faulty power system is required. The purpose of the present invention is to suppress the increase in the blocking capacity of various circuits by applying a current-limiting reactor at the end.

또한, 본 발명의 목적은, 각종 분산전원, 최대수요전력치 제어장치 및 이에 관련된 수배전반을 통합적으로 공급함으로써, 수요자의 요구에 부합하는 시스템을 제공하는데 그 목적이 있다.In addition, an object of the present invention is to provide a system that meets the needs of the consumer by integrally supplying various distributed power supplies, maximum demand power value control device and related switchgear.

그리고, 본 발명의 목적은, 운영자의 편리성을 도모하기 위하여 로컬운전을 기본으로 유무선 선로를 이용하여 전용단말기, 인터넷망에 연결된 컴퓨터 또는 스마트폰을 이용하여 원격감시제어를 제공하는데 그 목적이 있다.In addition, an object of the present invention is to provide a remote monitoring control using a dedicated terminal, a computer or a smart phone connected to the Internet network using a wired or wireless line based on local operation in order to facilitate the operator's convenience. .

이러한 기술적 과제를 달성하기 위한 본 발명의 계통연계형 분산전원 이용 피크제어 수배전반은, 발전소로부터의 수전이 정상적으로 이루어지되, 부하측의 소비전력이 기 설정된 1단계 기준전력을 초과하여 지속적으로 증가하는 경우, 수전용 인입간선에 설치된 적산전력계의 소비전력량과 비례하는 전기적 펄스신호를 인가받아 최대수요전력치(피크치)를 연속적으로 모니터링하되, 모니터링 중인 최대수요전력치가 지속적으로 증가하여 기 설정된 목표 피크치를 초과할 것으로 예측되는 경우, 분산전원의 가동을 위한 제어신호를 분산전원(200)으로 인가하며, 발전전압 및 주파수가 정격에 도달하는 경우, 동기검출 기능을 이용하여 발전소의 전력계통과 분산전원(200)을 병렬 운전하여 피크치를 낮추(Peak Cut)도록 제어하는 자동종합제어기(100);를 포함한다.
In order to achieve such a technical problem, the grid-connected distributed power supply peak control switchgear according to the present invention has a normal power reception from a power plant, but when the power consumption on the load side continuously exceeds the preset first stage reference power, The maximum demand power value (peak value) is continuously monitored by receiving an electric pulse signal proportional to the power consumption of the integrated power meter installed in the power supply incoming line, but the maximum demand power value under monitoring is continuously increased to exceed the preset target peak value. If it is expected that the control signal for the operation of the distributed power supply to the distributed power supply 200, when the generation voltage and frequency reaches the rating, the power system of the power plant and the distributed power supply 200 using the synchronous detection function It includes; an automatic integrated controller 100 to control to lower the peak value by parallel operation (Peak Cut); The.

그리고, 전술한 시스템을 기반으로 하는 본 발명의 계통연계형 분산전원용 피크제어 수배전반 운전방법은, 자동종합제어기가 부하측의 소비전력이 기 설정된 1단계 기준전력을 초과하여 지속적으로 증가하는지 여부를 판단하는 (a) 단계; (a) 단계의 판단결과, 부하측의 소비전력이 기 설정된 1단계 기준전력을 초과하여 지속적으로 증가하는 경우, 자동종합제어기가 수전용 인입간선에 설치된 적산전력계의 전기적 펄스신호를 인가받아 최대수요전력치(피크치)를 연속적으로 모니터링하는 (b) 단계; 자동종합제어기가 모니터링 중인 최대수요전력치가 지속적으로 증가하여 기 설정된 목표 피크치의 초과가 예상되는지 여부를 판단하는 (c) 단계; 모니터링 중인 최대수요전력치가 지속적으로 증가하여 기 설정된 목표 피크치 초과가 예상되는 경우, 자동종합제어기가 분산전원의 가동을 위한 제어신호를 분산전원으로 인가하는 (d) 단계; 자동종합제어기가 발전전압이 정격전압에 도달하고 주파수가 정격에 도달하는지 여부를 판단하는 (e) 단계; (e) 단계의 판단결과, 발전전압이 정격전압에 도달하고 주파수가 정격에 도달하는 경우, 자동종합제어기가 동기검출 기능을 이용하여 발전소의 전력계통과 분산전원을 병렬 운전하도록 제어하여 피크치를 낮추는 (f) 단계; 및 모니터링결과 전력수요가 기 설정된 1단계 기준전력 미만으로 감소하는 경우, 자동종합제어기가 분산전원 가동을 중단시키는 제어신호를 분산전원으로 인가하여 분산전원을 정지시키는 (g) 단계;를 포함한다.And, the peak control switchgear operation method for grid-connected distributed power supply of the present invention based on the system described above, the automatic integrated controller determines whether the power consumption of the load side continuously exceeds the preset one-step reference power (a) step; As a result of step (a), when the power consumption on the load side continuously increases beyond the preset 1st stage reference power, the automatic integrated controller receives the electric pulse signal of the integrated power meter installed on the incoming lead line (B) continuously monitoring the tooth (peak); (C) determining, by the automatic comprehensive controller, whether the maximum demand power value being monitored is continuously increased to exceed the preset target peak value; (D) applying, by the automatic integrated controller, a control signal for operating the distributed power supply to the distributed power supply when the maximum demand power value being monitored is continuously increased to exceed the preset target peak value; (E) determining, by the automatic comprehensive controller, whether the generated voltage reaches the rated voltage and the frequency reaches the rated voltage; As a result of step (e), when the generated voltage reaches the rated voltage and the frequency reaches the rated voltage, the automatic integrated controller uses the synchronous detection function to control the power system and the distributed power supply of the power plant in parallel to lower the peak value. (f) step; And (g) stopping the distributed power supply by applying a control signal for stopping the distributed power supply to the distributed power supply when the power demand decreases below the preset first stage reference power as a result of the monitoring.

상기와 같은 본 발명에 따르면, 전력소비가 증가되는 시점에 분산전원을 활용하여 최대수요전력치(피크치)를 낮춤(Peak Cut)으로써, 전력요금을 절감시키는 효과가 있다.According to the present invention as described above, by lowering the maximum demand power value (Peak value) by using a distributed power supply at the time when the power consumption is increased (Peak Cut), there is an effect of reducing the power bill.

또한, 본 발명에 따르면, 기존에 설치된 분산전원 및 신설되는 분산전원에도 적용이 가능함으로써, 소비자의 부담을 최소화 할 수 있고 동시에 절체시 무정전으로 작동하므로 전력품질 유지에도 탁월한 최대수요전력 초과 방지 시스템을 제공하는 효과가 있다.In addition, according to the present invention, it can be applied to the existing distributed power supply and new distributed power supply, thereby minimizing the burden on the consumer and at the same time operating uninterrupted when switching, the maximum demand power exceeding prevention system excellent in maintaining the power quality It is effective to provide.

또한, 본 발명에 따르면, 분산전원을 계통에 연계시키는 종합제어장치 및 분산전원장치(분산전원은 선택 사항)를 통합적으로 공급함으로써, 수요자의 요구에 부합하는 시스템을 제공하는 효과가 있다.In addition, according to the present invention, there is an effect to provide a system that meets the needs of the consumer by integrally supplying the integrated control device and the distributed power supply (optional distributed power supply) for linking the distributed power supply to the system.

그리고, 본 발명에 따르면, 운영자의 편리성을 도모하기 위하여 로컬운전을 기본으로 유무선 선로를 이용하여 전용단말기, 인터넷망에 연결된 컴퓨터 또는 스마트폰을 이용하여 원격감시제어를 제공하는 효과가 있다.In addition, according to the present invention, there is an effect of providing a remote monitoring control using a dedicated terminal, a computer or a smart phone connected to the Internet network using a wired or wireless line based on local operation in order to facilitate the operator's convenience.

도 1은 본 발명에 따른 계통연계형 분산전원용 피크제어 수배전반을 도시한 구성도.
도 2는 본 발명에 따른 계통연계형 분산전원용 피크제어 수배전반 운전 방법을 도시한 순서도.
도 3은 본 발명에 따른 계통연계형 분산전원용 피크제어 수배전반 운전 방법의 제S60단계 이후과정을 도시한 순서도.
도 4는 본 발명에 따른 계통연계형 분산전원용 피크제어 수배전반 운전 방법의 제S70단계 이후과정을 도시한 순서도.1 is a block diagram showing a peak control switchgear for grid-connected distributed power supply according to the present invention.
Figure 2 is a flow chart illustrating a peak control switchgear operating method for a grid-connected distributed power supply according to the present invention.
3 is a flowchart illustrating a process after step S60 of a method for operating a peak control switchgear for a grid-connected distributed power supply according to the present invention;
4 is a flowchart illustrating a process after step S70 of a method for operating a peak control switchgear for a grid-connected distributed power supply according to the present invention.

본 발명의 구체적인 특징 및 이점들은 첨부도면에 의거한 다음의 상세한 설명으로 더욱 명백해질 것이다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 발명자가 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야 할 것이다. 또한, 본 발명에 관련된 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는, 그 구체적인 설명을 생략하였음에 유의해야 할 것이다.Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It should be interpreted in terms of meaning and concept. In addition, when it is determined that the detailed description of the configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, it should be noted that the detailed description is omitted.

도 1에 도시된 바와 같이, 본 발명에 따른 계통연계형 분산전원용 피크제어 수배전반(A)은 자동종합제어기(100) 및 분산전원(200)을 포함하여 구성된다.As shown in FIG. 1, the peak control switchgear A for the grid-connected distributed power supply according to the present invention includes an automatic comprehensive controller 100 and a distributed power supply 200.

구체적으로, 도 1을 참조하여 본 발명에 따른 계통연계형 분산전원용 피크제어 수배전반(A)의 제1 운전모드 에 대해 살피면 아래와 같다.Specifically, referring to FIG. 1, the first operation mode of the peak control switchgear A for grid-connected distributed power sources according to the present invention is as follows.

자동종합제어기(100)는 발전소로부터의 수전이 정상적으로 이루어지되, 부하측의 소비전력이 기 설정된 1단계 기준전력을 초과하여 지속적으로 증가하는 경우, 수전용 인입간선에 설치된 적산전력계의 소비전력량과 비례하는 전기적 펄스신호를 인가받아 최대수요전력치(피크치)를 연속적으로 모니터링 한다.The automatic integrated controller 100 normally receives power from the power plant, but when the power consumption on the load side continuously increases beyond the preset first-stage reference power, the automatic power controller 100 is proportional to the power consumption of the integrated power meter installed on the incoming lead. The maximum demand power value (peak value) is continuously monitored by applying electric pulse signal.

이때, 모니터링 중인 최대수요전력치가 지속적으로 증가하여 기 설정된 목표 피크치를 초과할 것으로 예측되는 경우, 자동종합제어기(100)가 분산전원 가동을 위한 제어신호를 각종 비상발전기, 가스터빈 동기발전기, 엔진구동 동기발전기, 연료전지 또는 전력저장장치 중에 어느 하나를 포함하는 분산전원(200)으로 인가하며, 발전전압 및 주파수가 정격에 도달하는 경우, 바이패스 고속차단기를 ON상태로 전환하여 발전소의 전력계통과 분산전원(200)을 병렬 운전하여 피크치를 낮추(Peak Cut)도록 제어한 다음, ATS(Automatic Transfer Switch)를 분산전원(200)측으로 전환시켜 발전소로부터의 정전시 중요(비상)부하에 무정전으로 분산전원의 전력이 공급되도록 대비한다.At this time, when it is predicted that the maximum demand power value being monitored continuously increases to exceed the preset target peak value, the automatic integrated controller 100 generates control signals for operating a distributed power source, various emergency generators, gas turbine synchronous generators, and engine drives. It is applied to the distributed power source 200 including any one of a synchronous generator, a fuel cell, or a power storage device. When the generation voltage and frequency reach the rated value, the bypass high-speed circuit breaker is turned on to turn on the power system of the power plant. The distributed power supply 200 is operated in parallel to control the peak value to be cut, and then the ATS (Automatic Transfer Switch) is switched to the distributed power supply 200 side to distribute uninterrupted power to critical (emergency) load during power failure from the power plant. Be prepared to supply power.

또한, 자동종합제어기(100)는 분산전원(200)과 한전전력계통간의 병렬운전시, 한전의 분산전원 연계기술기준에 의거 어떠한 경우에라도 분산전원이 단독운전을 수행하는 것을 방지하며, 분산전원(200)에서 발전소와 연결된 계통측으로 전력이 역 송전되는 것을 방지한다.In addition, the automatic integrated controller 100 prevents the distributed power supply from performing independent operation in any case based on the KEPCO's distributed power supply technology standard in parallel operation between the distributed power supply 200 and the KEPCO power system. 200) prevents reverse power transmission to the grid side connected to the power plant.

또한, 자동종합제어기(100)는 모니터링결과 전력수요가 기 설정된 1단계 기준전력 미만으로 감소하는 경우, ATS를 발전소측으로 전환한 다음, 바이패스 고속차단기를 차단시킨 후, 분산전원(200)을 정지시킨다.In addition, the automatic integrated controller 100 switches the ATS to the power plant side when the power demand decreases below the preset first-stage reference power, and then shuts down the bypass high-speed circuit breaker and stops the distributed power supply 200. Let's do it.

그리고, 자동종합제어기(100)는 모니터링한 최대수요전력치(피크치)를 기 설정된 전용단말기, 인터넷망에 연결된 컴퓨터 또는 스마트폰으로 전송하여 관리자가 전력계통 상태를 실시간으로 확인하도록 한다.In addition, the automatic comprehensive controller 100 transmits the monitored maximum demand power value (peak value) to a preset dedicated terminal, a computer or a smartphone connected to the Internet network, so that the administrator checks the power system status in real time.

또한, 본 발명에 따른 계통연계형 분산전원 이용 피크제어 수배전반(A)은, 발전소로부터 수전되어 한전전력계통으로의 전원인가를 제어하도록 변류기(CT) 및 계기용변압기(PT)와 접속되는 계통연계용 디지털 복합 계전기를 포함하여 구성될 수 있다.In addition, the grid-connected distributed power supply peak control switchgear (A) according to the present invention, the grid connection is connected to the current transformer (CT) and instrument transformer (PT) so as to control the power supply from the power plant to the KEPCO power system. It can be configured to include a digital composite relay for.

또한, 본 발명에 따른 자동종합제어기(100)는 정보통신망을 통해 접속된 전력제어시스템 또는 빌딩 에너지 관리 시스템(BEMS: Building Energy Management System)의 제어에 따라 구동될 수 있다.In addition, the automatic integrated controller 100 according to the present invention may be driven under the control of a power control system or a building energy management system (BEMS) connected through an information communication network.

이하에서는 그 구체적인 언급을 생략하겠으나, 본 발명에 따른 시스템에는 단독운전 방지장치 및 역송전 방지장치가 구비되어있어 전기안전에 문제가 없으며, 한전의 분산전원 연계기술기준에도 100% 만족하도록 구성되어있다.
In the following, the detailed description will be omitted, but the system according to the present invention is equipped with a single operation prevention device and a reverse power transmission prevention device, so there is no problem in electrical safety, and is configured to satisfy 100% of KEPCO's distributed power supply technology standards. .

이하, 도 1을 참조하여 본 발명에 따른 계통연계형 분산전원 이용 피크제어 수배전반(A)의 제2 운전모드 에 대해 살피면 아래와 같다.Hereinafter, the second operation mode of the peak-controlled switchgear A using the grid-connected distributed power supply according to the present invention will be described with reference to FIG. 1.

전술한 제1 운전모드 상태로 운전중에, 발전소로부터의 수전이 비정상적으로 중단되는 경우, 분산전원(200)과 기연결된 ATS를 경유하여 무정전으로 중요(비상)부하에 비상전력을 공급한다.When the power supply from the power plant is abnormally interrupted while operating in the above-described first operation mode, emergency power is supplied to the critical (emergency) load uninterrupted via the ATS previously connected to the distributed power supply 200.

또한, 중요(비상)부하에 비상전력 공급 중에 발전소로부터의 전력공급이 복전되는 경우, 자동종합제어기(100)가 바이패스 고속차단기를 ON상태로 전환하여 발전소의 전력계통과 분산전원(200)이 병렬운전을 수행하도록 제어하되, 모니터링한 최대수요전력치(피크치)의 증가가 멈추는 경우, ATS를 발전소측으로 전환한 다음, 바이패스 고속차단기를 차단시킨 후, 분산전원(200)을 정지시켜서 중요(비상)부하에 무정전으로 전력을 공급하도록 제어한다.
In addition, when the power supply from the power plant is restored during the emergency power supply to the critical (emergency) load, the automatic integrated controller 100 switches the bypass high-speed circuit breaker to the ON state so that the power system and the distributed power supply 200 of the power plant are turned off. If the increase in the monitored maximum demand power (peak value) stops, the ATS is switched to the power plant side, the bypass fast circuit breaker is cut off, and then the distributed power supply 200 is stopped. Emergency) to control the uninterrupted power supply to the load.

그리고, 도 1을 참조하여 본 발명에 따른 계통연계형 분산전원 이용 피크제어 수배전반(A)의 제3 운전모드 에 대해 살피면 아래와 같다.In addition, referring to FIG. 1, the third operation mode of the peak-controlled switchgear A using the grid-connected distributed power source according to the present invention is as follows.

발전소로부터 수전하고 분산전원이 정지하고 있는 상태에서 발전소로부터의 수전이 중단되는 경우, 자동종합제어기(100)가 ATS를 분산전원(200)측으로 전환토록하고 분산전원(200)을 자동으로 가동시켜 중요(비상)부하에 전력을 공급하도록 제어하되, 발전소로부터의 전력공급이 복전되는 경우, 바이패스 고속차단기를 ON상태로 전환하여, 병렬운전 상태를 만든 다음, ATS를 발전소측으로 전환한 후 바이패스 고속차단기를 차단하고, 분산전원(200)의 작동을 정지시켜 중요(비상)부하에 무정전으로 전력을 공급한다.
In the case of receiving power from the power plant and receiving power from the power plant is stopped while the distributed power supply is stopped, the automatic integrated controller 100 causes the ATS to switch to the distributed power supply 200 side and automatically operates the distributed power supply 200. Control the power supply to the (emergency) load, but if the power supply from the power plant is restored, switch the bypass high-speed circuit breaker to the ON state, create a parallel operation state, and then switch the ATS to the power plant side, then bypass high-speed. The circuit breaker is shut off, and the distributed power supply 200 is stopped to supply power to the critical (emergency) load uninterrupted.

그리고, 본 발명에 따른 계통연계형 분산전원 이용 피크제어 수배전반(A)의 제1 운전모드, 제2 운전모드 및 제3 운전모드 중에 어느 하나의 모드에서, 피크가 계속 증가되어 분산전원(200)의 병렬운전만으로는 목표피크치 제어가 불가능한 경우, 자동종합제어기(100)가 종래의 최대수요전력제어기와 동일하게 부하의 중요도에 따라 미리 정한 순서대로 부하의 차단을 제어하도록 구성된다.In addition, in any one of the first operation mode, the second operation mode, and the third operation mode of the grid-connected distributed power supply using peak control switchgear A according to the present invention, the peak is continuously increased so that the distributed power supply 200 When the target peak control is not possible only by parallel operation of the automatic general controller 100, the automatic integrated controller 100 is configured to control the interruption of the load in a predetermined order according to the importance of the load, as in the conventional maximum demand power controller.

아울러, 전술한 바와 같이 본 발명에 따른 계통연계형 분산전원 이용 피크제어 수배전반(A)은, 제1 운전모드 내지 제3 운전모드 각각이, 1) 최대수요전력 감시기능, 2) 분산전원 단독운전방지 기능, 3) 동기운전 기능, 4) 병렬운전시 분산전원 발전전력의 발전소측으로 역송전방지 기능, 5) 병렬운전시 발전소측 전력이 분산전원측으로의 유입 방지 기능, 6) 분산전원의 전압조정 및 주파수제어, 출력제어 기능, 7) 각종 전기량 계측 기능, 8) 각종 안전 및 효율적인 운영을 위한 인터록 기능을 수행함으로써, 안전하고 효율적인 전력 운용을 제공한다.
In addition, as described above, the grid-connected distributed power supply peak control switchgear A according to the present invention includes the first operation mode and the third operation mode, respectively, 1) the maximum demand power monitoring function, and 2) the distributed power supply alone operation. Prevention function, 3) Synchronous operation function, 4) Reverse transmission prevention function of distributed power generation power generation in parallel operation, 5) Prevention of inflow of power generation side power into distributed power supply in parallel operation, 6) Voltage adjustment of distributed power supply And frequency control, output control function, 7) various electric quantity measurement functions, and 8) interlock functions for safe and efficient operation, thereby providing safe and efficient power operation.

이하, 도 2를 참조하여 본 발명에 따른 계통연계형 분산전원 이용 피크제어 수배전반 운전 방법에 대해 살피면 아래와 같다.Hereinafter, referring to FIG. 2, a method for operating a peak-controlled switchgear using a grid-connected distributed power source according to the present invention will be described below.

먼저, 자동종합제어기(100)가 부하측의 소비전력이 기 설정된 1단계 기준전력을 초과하여 지속적으로 증가하는지 여부를 판단한다(S10).First, the automatic comprehensive controller 100 determines whether the power consumption of the load side continuously increases beyond the preset first stage reference power (S10).

제S10단계의 판단결과, 부하측의 소비전력이 기 설정된 1단계 기준전력을 초과하여 지속적으로 증가하여 목표 최대수요전력의 초과가 예측되는 경우, 자동종합제어기(100)가 수전용 인입간선에 설치된 적산전력계의 소비전력량과 비례하는 전기적 펄스신호를 인가받아 최대수요전력치(피크치)를 연속적으로 모니터링 한다(S20).As a result of the determination in step S10, when the power consumption of the load side is continuously increased beyond the preset first stage reference power and the target maximum demand power is predicted to be exceeded, the integrated automatic controller 100 is integrated in the incoming lead line. An electric pulse signal proportional to the power consumption of the power meter is applied to continuously monitor the maximum demand power value (peak value) (S20).

뒤이어, 자동종합제어기(100)가 모니터링 중인 최대수요전력치가 지속적으로 증가하여 기 설정된 목표 피크치의 초과가 예측되는지 여부를 판단한다(S30).Subsequently, the automatic total controller 100 continuously increases the maximum demand power value being monitored to determine whether or not the exceeding of the preset target peak value is predicted (S30).

제S30단계의 판단결과, 모니터링 중인 최대수요전력치가 지속적으로 증가하여 기 설정된 목표 피크치의 초과가 예측되는 경우, 자동종합제어기(100)가 분산전원의 발전 가동을 위한 제어신호를 분산전원(200)으로 인가한다(S40).As a result of the determination in step S30, when the maximum demand power value being monitored is continuously increased to exceed the preset target peak value, the automatic integrated controller 100 transmits a control signal for generating and operating the distributed power source. Applies to (S40).

이어서, 자동종합제어기(100)가 발전전압이 정격전압 및 주파수가 정격에 도달하는지 여부를 판단한다(S50).Subsequently, the automatic integrated controller 100 determines whether the generated voltage reaches the rated voltage and the rated frequency (S50).

제S50단계의 판단결과, 발전전압이 정격전압 및 주파수가 정격에 도달하는 경우, 자동종합제어기(100)가 바이패스 고속차단기를 ON상태로 전환하여 발전소의 전력계통과 분산전원(200)을 병렬 운전하도록 제어하여 피크치를 낮춘다(S60). 다음에는 ATS를 분산전원(200)측으로 전환시켜 발전소로부터의 정전시 중요(비상)부하에 무정전으로 분산전원의 전력이 공급되도록 대비한다.As a result of the determination in step S50, when the generated voltage reaches the rated voltage and the rated frequency, the automatic integrated controller 100 switches the bypass high-speed circuit breaker to the ON state to parallel the power system of the power plant and the distributed power supply 200. Control to drive to lower the peak value (S60). Next, the ATS is switched to the distributed power supply 200 to prepare for supplying power of the distributed power supply uninterrupted to the critical (emergency) load during power failure from the power plant.

그리고, 모니터링 결과 전력수요가 기 설정된 1단계 기준전력 미만으로 감소하는 경우, 자동종합제어기(100)가 ATS를 발전소측으로 전환한 다음, 바이패스 고속차단기를 차단시킨 후, 분산전원(200)의 가동이 정지하도록 제어한다(S70).When the power demand decreases below the preset first stage reference power, the automatic integrated controller 100 switches the ATS to the power plant side and then shuts down the bypass high-speed circuit breaker, and then operates the distributed power supply 200. It is controlled to stop (S70).

이하, 도 3을 참조하여 본 발명에 따른 계통연계형 분산전원 이용 피크제어 수배전반 운전 방법의 제S60단계 이후과정에 대해 살피면 아래와 같다.Hereinafter, referring to FIG. 3, the process after step S60 of the method for operating a peak-controlled switchgear using a grid-connected distributed power source according to the present invention will be described.

제S60단계 이후, 자동종합제어기(100)가 발전소로부터의 수전이 비정상적으로 중단되는지 여부를 판단한다(S80).After the step S60, the automatic comprehensive controller 100 determines whether the faucet from the power plant is abnormally stopped (S80).

제S80단계의 판단결과, 발전소로부터의 수전이 비정상적으로 중단되는 경우, 분산전원(200)과 기연결된 ATS를 경유하여 무정전으로 중요(비상)부하에 비상전력을 공급한다(S90).As a result of the determination in step S80, when the power supply from the power plant is abnormally interrupted, emergency power is supplied to the critical (emergency) load as an uninterruptible power via the ATS connected to the distributed power supply 200 (S90).

이어서, 자동종합제어기(100)가 중요(비상)부하에 비상전력이 공급되는 중에 발전소로부터의 전력공급이 복전되는지 여부를 판단한다(S100).Subsequently, the automatic general controller 100 determines whether the power supply from the power plant is restored while emergency power is supplied to the critical (emergency) load (S100).

제S100단계의 판단결과, 중요(비상)부하에 비상전력 공급 중에 발전소로부터의 전력공급이 복전되는 경우, 자동종합제어기(100)가 바이패스 고속차단기를 ON상태로 전환하여 분산전원(200)이 병렬운전을 수행하도록 제어한다(S110).As a result of the determination in step S100, when the power supply from the power plant is restored during the emergency power supply to the critical (emergency) load, the automatic integrated controller 100 switches the bypass high-speed circuit breaker to the ON state so that the distributed power supply 200 Control to perform parallel operation (S110).

그리고, 모니터링한 최대수요전력치(피크치)의 증가가 멈추는지 여부를 판단한다(S120).Then, it is determined whether the increase in the monitored maximum demand power value (peak value) is stopped (S120).

제S120단계의 판단결과, 최대수요전력치(피크치)의 증가가 멈춘 경우, 자동종합제어기(100)가 ATS를 발전소측으로 전환 다음, 바이패스 고속차단기를 차단시킨 후, 분산전원(200)을 정지시켜서 중요(비상)부하에 무정전으로 전력을 공급하도록 제어한다(S130).
As a result of the determination in step S120, when the increase in the maximum demand power value (peak value) stops, the automatic integrated controller 100 switches the ATS to the power plant side, then shuts down the bypass high-speed circuit breaker, and then stops the distributed power supply 200. By controlling the power supply to the uninterrupted power to the critical (emergency) load (S130).

이하, 도 4를 참조하여 본 발명에 따른 계통연계형 분산전원 이용 피크제어 수배전반 운전 방법의 제S70단계 이후과정에 대해 살피면 아래와 같다.Hereinafter, referring to FIG. 4, the process after step S70 of the method for operating a grid-connected distributed power supply peak control switchgear according to the present invention is as follows.

제S70단계 이후, 자동종합제어기(100)가 발전소로부터의 수전이 비정상적으로 중단되는지 여부를 판단한다(S140).After the step S70, the automatic comprehensive controller 100 determines whether the faucet from the power plant is abnormally stopped (S140).

제S140단계의 판단결과, 발전소로부터의 수전이 비정상적으로 중단되는 경우, 자동종합제어기(100)가 ATS를 분산전원(200)측으로 전환하고, 분산전원(200)을 자동으로 가동시켜 중요(비상)부하에 전력을 공급하도록 제어한다(S150).As a result of the determination in step S140, when the faucet from the power plant is abnormally interrupted, the automatic integrated controller 100 switches the ATS to the distributed power supply 200 side, and automatically operates the distributed power supply 200 to be important (emergency). Control to supply power to the load (S150).

이어서, 자동종합제어기(100)가 발전소로부터의 전력공급이 복전되는지 여부를 판단한다(S160).Subsequently, the automatic integrated controller 100 determines whether the power supply from the power plant is restored (S160).

제S160단계의 판단결과, 발전소로부터의 전력공급이 복전되는 경우, 자동종합제어기(100)가 바이패스 고속차단기를 ON상태로 전환하여 병렬운전 상태를 만든 다음, ATS를 발전소측으로 전환 후에, 바이패스 고속차단기를 차단하고, 상기 분산전원(200)의 작동을 정지시켜 중요(비상)부하에 무정전으로 전력을 공급한다(S170).As a result of the determination of step S160, when the power supply from the power plant is restored, the automatic integrated controller 100 switches the bypass high-speed circuit breaker to the ON state to make a parallel operation state, and then, after switching the ATS to the power plant side, bypasses The high speed circuit breaker is shut off and the operation of the distributed power supply 200 is stopped to supply power to the critical (emergency) load uninterrupted (S170).

이상으로 본 발명의 기술적 사상을 예시하기 위한 바람직한 실시예와 관련하여 설명하고 도시하였지만, 본 발명은 이와 같이 도시되고 설명된 그대로의 구성 및 작용에만 국한되는 것이 아니며, 기술적 사상의 범주를 일탈함이 없이 본 발명에 대해 다수의 변경 및 수정이 가능함을 당업자들은 잘 이해할 수 있을 것이다. 따라서 그러한 모든 적절한 변경 및 수정과 균등 물들도 본 발명의 범위에 속하는 것으로 간주되어야 할 것이다.While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be appreciated by those skilled in the art that numerous changes and modifications may be made without departing from the invention. And all such modifications and changes as fall within the scope of the present invention are therefore to be regarded as being within the scope of the present invention.

A: 계통연계형 분산전원 이용 피크제어 수배전반
100: 자동종합제어기 200: 분산전원A: Peak control switchgear using grid-connected distributed power supply
100: automatic integrated controller 200: distributed power

Claims (8)

계통연계형 분산전원용 피크제어 수배전반에 있어서,
부하측의 소비전력이 기 설정된 1단계 기준전력을 초과하여 지속적으로 증가하는 경우, 수전용 인입간선에 설치된 적산전력계의 소비전력량과 비례하는 전기적 펄스신호를 인가받아 최대수요전력치(피크치)를 연속적으로 모니터링하는 자동종합제어기(100);를 포함하되,
상기 자동종합제어기(100)는,
모니터링 중인 최대수요전력치가 지속적으로 증가하여 기 설정된 목표 피크치를 초과할 것으로 예측되는 경우, 분산전원 가동을 위한 제어신호를 분산전원(200)으로 인가하며, 발전전압이 정격전압에 도달하고, 주파수가 정격에 도달하는 경우, 바이패스 고속차단기를 ON상태로 전환하여, 발전소의 전력계통과 분산전원(200)을 병렬 운전하여 피크치를 낮추(Peak Cut)도록 제어한 다음, ATS를 분산전원(200)측으로 전환하여 발전소로부터의 수전이 비정상적으로 중단되는 경우에 대비하고,
발전소로부터의 수전이 비정상적으로 중단되는 경우, 상기 분산전원(200)과 기연결된 ATS를 경유하여 무정전으로 중요(비상)부하에 비상전력을 공급하며,
중요(비상)부하에 비상전력 공급 중에 발전소로부터의 전력공급이 복전되는 경우, 바이패스 고속차단기를 ON상태로 전환하여 발전소의 전력계통과 상기 분산전원(200)이 병렬운전을 수행하도록 제어하고, 모니터링한 최대수요전력치(피크치)의 증가가 멈추는 경우, ATS를 발전소측으로 전환한 다음, 바이패스 고속차단기를 차단시킨 후, 상기 분산전원(200)을 정지시켜서 중요(비상)부하에 무정전으로 전력을 공급하도록 제어하며,
발전소로부터 수전하고 분산전원(200)이 정지하고 있는 상태에서 발전소로부터의 수전이 중단되는 경우, ATS를 분산전원(200)측으로 전환하고 상기 분산전원(200)을 자동으로 가동시켜 중요(비상)부하에 전력을 공급하도록 제어하되,
발전소로부터의 전력공급이 복전되는 경우, 바이패스 고속차단기를 ON상태로 전환하여 병렬운전 상태를 만든 다음, ATS를 발전소측으로 전환한 후에 바이패스 고속차단기를 차단하고, 상기 분산전원(200)의 작동을 정지시켜, 중요(비상)부하에 무정전으로 전력공급하는 것을 특징으로 하는 계통연계형 분산전원용 피크제어 수배전반.In the peak control switchgear for grid-connected distributed power supply,
When the power consumption on the load side continuously increases beyond the preset 1st stage reference power, the maximum demand power value (peak value) is continuously received by receiving an electrical pulse signal proportional to the power consumption of the integrated power meter installed on the incoming lead line. Including; automatic monitoring controller 100;
The automatic comprehensive controller 100,
When the maximum demand power value being monitored is predicted to increase continuously and exceed the preset target peak value, the control signal for operating the distributed power supply is applied to the distributed power supply 200, and the generated voltage reaches the rated voltage and the frequency is increased. When the rated voltage is reached, the bypass high-speed circuit breaker is turned on, the parallel operation of the power system of the power plant and the distributed power supply 200 is controlled to reduce the peak value, and then the ATS is distributed to the distributed power supply 200. In case the power supply from the power plant is abnormally interrupted,
When the power supply from the power plant is abnormally interrupted, the emergency power is supplied to the critical (emergency) load uninterrupted via the ATS connected to the distributed power supply 200,
When the power supply from the power plant is restored during the emergency power supply to the critical (emergency) load, the bypass high-speed circuit breaker is turned on to control the power system of the power plant and the distributed power supply 200 to perform parallel operation. When the increase in the monitored maximum demand power (peak value) stops, switch the ATS to the power plant side, cut off the bypass high-speed circuit breaker, and then stop the distributed power supply 200 to power uninterrupted at an important (emergency) load. Control the supply of
In the case of receiving power from the power plant and receiving power from the power plant is stopped while the distributed power supply 200 is stopped, the ATS is switched to the distributed power supply 200 side, and the distributed power supply 200 is automatically operated to perform an important (emergency) load. To power the system,
When the power supply from the power plant is restored, the bypass fast circuit breaker is turned on to create a parallel operation state, and after the ATS is switched to the power plant side, the bypass fast circuit breaker is cut off, and the distributed power supply 200 is operated. A peak control switchgear for grid-connected distributed power supplies, characterized in that the power supply is supplied uninterrupted to a critical (emergency) load by stopping the power supply. 제 1 항에 있어서,
상기 분산전원(200)은,
비상발전기, 가스터빈 동기발전기, 엔진구동 동기발전기, 연료전지 또는 전력저장장치 중에 어느 하나를 포함하는 것을 특징으로 하는 계통연계형 분산전원용 피크제어 수배전반.The method of claim 1,
The distributed power supply 200,
A peak control switchgear for grid-connected distributed power supplies comprising any one of an emergency generator, a gas turbine synchronous generator, an engine driven synchronous generator, a fuel cell or a power storage device. 제 1 항에 있어서,
상기 자동종합제어기(100)는,
상기 분산전원(200)과 한전전력계통과 병렬운전시, 한국전력의 분산전원의 연계기술기준에 의거 어떠한 경우에라도 분산전원이 단독운전을 수행하는 것을 방지하며, 상기 분산전원(200)에서 발전소와 연결된 계통측으로 전력이 역 송전되는 것을 방지하는 것을 특징으로 하는 계통연계형 분산전원용 피크제어 수배전반.The method of claim 1,
The automatic comprehensive controller 100,
In parallel operation with the distributed power source 200 and the KEPCO power system, the distributed power source is prevented from performing a single operation in any case based on the linked technical standards of the distributed power source of the KEPCO. Peak control switchgear for grid-connected distributed power supply, characterized in that to prevent the reverse transmission of power to the connected grid side. 제 1 항에 있어서,
상기 자동종합제어기(100)는,
모니터링결과 전력수요가 기 설정된 기준전력 미만으로 감소하는 경우, ATS를 발전소측으로 전환 다음, 바이패스 고속차단기를 차단시킨 후, 상기 분산전원(200)의 작동을 정지시키는 것을 특징으로 하는 계통연계형 분산전원용 피크제어 수배전반.The method of claim 1,
The automatic comprehensive controller 100,
When the power demand decreases below the preset reference power as a result of monitoring, the ATS is switched to the power plant side, and then the bypass high-speed circuit breaker is shut off, and then the distributed power supply 200 is stopped. Peak control switchgear for power supply. 제 1 항에 있어서,
상기 자동종합제어기(100)는,
모니터링한 최대수요전력치(피크치)를 기 설정된 전용단말기, 인터넷망에 연결된 컴퓨터 또는 스마트폰으로 전송하여 관리자가 전력계통 상태를 실시간으로 확인하도록 하는 것을 특징으로 하는 계통연계형 분산전원용 피크제어 수배전반.The method of claim 1,
The automatic comprehensive controller 100,
A peak control switchgear for grid-connected distributed power supplies, characterized in that the administrator monitors the power system status in real time by transmitting the monitored maximum demand power (peak value) to a predetermined terminal, a computer or a smartphone connected to the Internet network. 삭제delete 계통연계형 분산전원용 피크제어 수배전반 운전 방법에 있어서,
(a) 자동종합제어기(100)가 부하측의 소비전력이 기 설정된 1단계 기준전력을 초과하여 지속적으로 증가하는지 여부를 판단하는 단계;
(b) 상기 (a) 단계의 판단결과, 부하측의 소비전력이 기 설정된 1단계 기준전력을 초과하여 지속적으로 증가하는 경우, 자동종합제어기(100)가 수전용 인입간선에 설치된 적산전력계의 전기적 펄스신호를 인가받아 최대수요전력치(피크치)를 연속적으로 모니터링하는 단계;
(c) 자동종합제어기(100)가 모니터링 중인 최대수요전력치가 지속적으로 증가하여 기 설정된 목표 피크치의 초과가 예상되는지 여부를 판단하는 단계;
(d) 모니터링 중인 최대수요전력치가 지속적으로 증가하여 기 설정된 목표 피크치 초과가 예상되는 경우, 자동종합제어기(100)가 분산전원(200)의 발전 가동을 위한 제어신호를 분산전원(200)으로 인가하는 단계;
(e) 자동종합제어기(100)가 분산전원(200)의 발전전압 및 주파수가 정격에 도달토록 함과 동시에 발전전압 및 주파수가 정격에 도달했는지 하는지 여부를 판단하는 단계;
(f) 상기 (e) 단계의 판단결과, 발전전압이 정격전압에 도달하고 주파수가 정격에 도달하는 경우, 자동종합제어기(100)가 바이패스 고속차단기를 ON상태로 전환하여 발전소의 전력계통과 분산전원(200)을 병렬 운전하도록 제어하여 피크치를 낮춘 다음, ATS를 분산전원(200)측으로 전환함으로써 발전소로부터의 수전이 중단되는 경우를 대비하는 단계;
(g) 모니터링결과 전력수요가 기 설정된 1단계 기준전력 미만으로 감소하는 경우, 자동종합제어기(100)가 ATS를 발전소측으로 전환한 다음, 바이패스 고속차단기를 차단시킨 후, 분산전원(200)을 정지시키는 단계;
(h) 발전소로부터의 수전이 중단되는지 여부를 판단하는 단계;
(i) 상기 (h) 단계의 판단결과, 발전소로부터의 수전이 중단되는 경우, 자동종합제어기(100)가 ATS를 분산전원(200)측으로 전환하고, 분산전원(200)을 자동으로 가동시켜 중요(비상)부하에 전력을 공급하도록 제어하는 단계;
(j) 자동종합제어기(100)가 발전소로부터의 전력공급이 복전되는지 여부를 판단하는 단계; 및
(k) 상기 (j) 단계의 판단결과, 발전소로부터의 전력공급이 복전되는 경우, 자동종합제어기(100)가 바이패스 고속차단기를 ON상태로 전환하여 병렬운전 상태를 만든 다음, ATS를 발전소측으로 전환한 후, 바이패스 고속차단기를 차단하고, 상기 분산전원(200)의 작동을 정지시켜 중요(비상)부하에 무정전으로 전력공급하는 단계;를 포함하며,
상기 (f) 단계 이후,
(l) 자동종합제어기(100)가 발전소로부터의 수전이 비정상적으로 중단되는지 여부를 판단하는 단계;
(m) 상기 (l) 단계의 판단결과, 발전소로부터의 수전이 비정상적으로 중단되는 경우, 분산전원(200)과 기연결된 ATS를 경유하여 무정전으로 중요(비상)부하에 비상전력을 공급하는 단계;
(n) 자동종합제어기(100)가 중요(비상)부하에 비상전력 공급 중에 발전소로부터의 전력공급이 복전되는지 여부를 판단하는 단계;
(o) 상기 (n) 단계의 판단결과, 중요(비상)부하에 비상전력 공급 중에 발전소로부터의 전력공급이 복전되는 경우, 자동종합제어기(100)가 바이패스 고속차단기를 ON상태로 전환하여 분산전원(200)이 병렬운전을 수행하도록 제어하는 단계;
(p) 모니터링한 최대수요전력치(피크치)의 증가가 멈추는지 여부를 판단하는 단계; 및
(q) 모니터링한 최대수요전력치(피크치)의 증가가 멈춘 경우, 자동종합제어기(100)가 ATS를 발전소측으로 전환한 다음, 바이패스 고속차단기를 차단시킨 후, 분산전원(200)을 정지시켜서 중요(비상)부하에 무정전으로 전력을 공급하도록 제어하는 단계;를 포함하는 것을 특징으로 하는 계통연계형 분산전원용 피크제어 수배전반 운전 방법.In the peak control switchgear operation method for grid-connected distributed power supply,
(a) the automatic integrated controller 100 determining whether the power consumption at the load side continuously increases beyond the preset first stage reference power;
(b) As a result of the determination in step (a), when the power consumption of the load side continuously increases beyond the preset first stage reference power, the automatic integrated controller 100 is an electrical pulse of the integrated power meter installed in the incoming lead Continuously monitoring a maximum demand power value (peak value) by receiving a signal;
(c) determining, by the automatic comprehensive controller 100, whether the maximum demand power value being monitored continuously increases to predict exceeding a predetermined target peak value;
(d) When the maximum demand power value being monitored is continuously increased to exceed the preset target peak value, the automatic integrated controller 100 applies a control signal for generating power generation of the distributed power supply 200 to the distributed power supply 200. Doing;
(e) allowing the automatic comprehensive controller 100 to determine whether the generated voltage and frequency of the distributed power source 200 have reached the rated value and whether the generated voltage and the frequency have reached the rated value;
(f) As a result of the determination in step (e), when the generated voltage reaches the rated voltage and the frequency reaches the rated voltage, the automatic integrated controller 100 switches the bypass high-speed circuit breaker to the ON state to pass the power system of the power plant. Controlling the distributed power supply 200 to operate in parallel to lower the peak value, and then preparing the case where the power supply from the power plant is stopped by switching the ATS to the distributed power supply 200 side;
(g) When the power demand decreases below the preset first-stage reference power, the automatic integrated controller 100 switches the ATS to the power plant side, cuts off the bypass high-speed circuit breaker, and then switches off the distributed power supply 200. Stopping;
(h) determining whether the water supply from the power plant is interrupted;
(i) When the power reception from the power plant is stopped as a result of the determination in step (h), the automatic integrated controller 100 switches the ATS to the distributed power supply 200 side, and automatically operates the distributed power supply 200 so as to be important. Controlling to supply power to the (emergency) load;
(j) the automatic controller 100 determining whether the power supply from the power plant is restored; And
(k) As a result of the determination of step (j), when the power supply from the power plant is restored, the automatic integrated controller 100 switches the bypass high-speed circuit breaker to the ON state to create a parallel operation state, and then moves the ATS to the power plant side. After switching, the bypass high-speed circuit breaker is cut off, and the operation of the distributed power supply 200 is stopped to supply an uninterruptible power supply to a critical (emergency) load;
After the step (f)
(l) the automatic integrated controller 100 determining whether the power supply from the power plant is abnormally stopped;
(m) supplying emergency power to an uninterrupted critical (emergency) load via the ATS previously connected to the distributed power supply 200 when the power supply from the power plant is abnormally interrupted as a result of the determination in step (l);
(n) the automatic integrated controller 100 determining whether the power supply from the power plant is restored during the emergency power supply at the critical (emergency) load;
(o) When the power supply from the power plant is restored during the emergency power supply to the critical (emergency) load as a result of the determination in step (n), the automatic integrated controller 100 switches the bypass fast circuit breaker to the ON state and distributes it. Controlling the power supply 200 to perform parallel operation;
(p) determining whether the increase in the monitored maximum demand power value (peak value) stops; And
(q) When the increase in the monitored maximum demand power (peak value) stops, the automatic integrated controller 100 switches the ATS to the power plant side, cuts off the bypass high-speed circuit breaker, and then stops the distributed power supply 200. A method of operating a peak control switchgear for a grid-connected distributed power supply, comprising the steps of: controlling power to be supplied uninterrupted to critical (emergency) loads. 삭제delete
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CN108880402A (en) * 2018-06-22 2018-11-23 卧龙电气集团辽宁荣信高科电气有限公司 A kind of high-power nine phases motor phase failure combination method
CN115182794A (en) * 2021-04-02 2022-10-14 中核核电运行管理有限公司 Method for reducing disturbance of two loops of power plant during grid connection
KR102366551B1 (en) * 2021-06-28 2022-02-23 이종석 Closed transsition transfer switch

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