KR101322449B1 - Power stabilizing apparatus linked with new regeneration energy - Google Patents

Power stabilizing apparatus linked with new regeneration energy Download PDF

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Publication number
KR101322449B1
KR101322449B1 KR1020120041833A KR20120041833A KR101322449B1 KR 101322449 B1 KR101322449 B1 KR 101322449B1 KR 1020120041833 A KR1020120041833 A KR 1020120041833A KR 20120041833 A KR20120041833 A KR 20120041833A KR 101322449 B1 KR101322449 B1 KR 101322449B1
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South Korea
Prior art keywords
power
converter
battery
renewable energy
commercial
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KR1020120041833A
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Korean (ko)
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박경선
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주식회사 맥스컴
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • H02J3/472For selectively connecting the AC sources in a particular order, e.g. sequential, alternating or subsets of sources
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/2176Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20The dispersed energy generation being of renewable origin
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/123Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/14Energy storage units

Abstract

PURPOSE: A power stabilizing apparatus linked with new energy generation is provided to use power efficiently, by installing a bidirectional converter. CONSTITUTION: A battery (150) stores an output power of a DC/DC converter. An AC/DC converter (160) converts an AC power source to a DC power source. The AC/DC converter supplies the DC power source to the battery. A bidirectional converter (120) supplies a power source to the AC power source and the battery. A control unit stabilizes the output power of the bidirectional converter. [Reference numerals] (140) Control part; (170) Generator; (AA) Solar energy; (BB) Wind energy; (CC) Tidal energy; (DD) Hydro energy

Description

신재생 에너지 연계형 전력 안정화 장치{POWER STABILIZING APPARATUS LINKED WITH NEW REGENERATION ENERGY} Renewable Energy Linked Power Stabilizer {POWER STABILIZING APPARATUS LINKED WITH NEW REGENERATION ENERGY}

본 발명은 신재생 에너지 연계형 전력 안정화 장치에 관한 것으로서, 더욱 상세하게는 신재생 에너지로부터 발전된 전력을 상용전원을 통하여 공급함은 물론 상용전원을 통하여 전원 공급이 불가능하거나 상용전원에 이상이 발생할 경우 상용전원을 안정화시킬 수 있는 신재생 에너지 연계형 전력 안정화 장치에 관한 것이다.
The present invention relates to a renewable energy-linked power stabilization device, and more particularly, power supplied from renewable energy through commercial power supply, as well as commercial power supply through the power supply is not available or commercial power is abnormal It relates to a renewable energy-linked power stabilization device that can stabilize the power supply.

일반적으로 화석연료의 고갈로 인하여 다양한 형태의 에너지원을 개발하고 있으며, 최근에는 신재생 에너지(태양력, 화력, 수력, 조력 등)를 이용하여 전력을 생산하고 생산된 전력을 소비함은 물론 잉여 전력을 상용전원(GRID)(예 : 한전라인)으로 공급하고 있다.In general, due to the depletion of fossil fuels, various types of energy sources are being developed, and recently, renewable power (solar, thermal, hydro, tidal, etc.) is used to produce power and consume the generated power. Is supplied to commercial power (GRID) (eg KEPCO line).

상기 신재생 에너지에 의한 전력은 다양한 에너지 원을 이용하게 됨은 물론, 생산되는 전력의 규모(생산 시간, 최대 값, 최소 값 등)가 서로 다르게 되는 것이다.The power of the renewable energy is to use a variety of energy sources, as well as the scale (production time, maximum value, minimum value, etc.) of the power produced is different.

최근에는 전자산업의 발달로 인하여 전기의 공급이 차단되거나 불안정할 경우에는 심각한 사회적 혼란을 야기하게 된다. 그러므로 각종 산업현장은 물론 사무실 등은 안정적인 전원공급이 중요시되고 있는 실정이다.Recently, when the supply of electricity is cut off or unstable due to the development of the electronic industry, it causes serious social disruption. Therefore, stable power supply is important in various industrial sites as well as offices.

한편, 신재생 에너지를 이용하는 형태는 신재생 에너지에 의해서 생산된 전력을 상용전원으로 공급하는 연계형과 신재생 에너지에 의해서 생산된 전력을 부하로 공급하는 독립형으로 크게 구분된다.On the other hand, the form of using renewable energy is largely divided into a link type of supplying power produced by renewable energy to a commercial power supply and a stand-alone type supplying power produced by renewable energy to a load.

상기 연계형은 도 1에 나타낸 바와 같이 신재생 에너지(10)에서 생산된 직류 전원을 DC/AC 컨버터(20)를 통과하여 교류 전원으로 변환한 후 상용전원(30)으로 공급하는 구성을 갖는다.As shown in FIG. 1, the associated type has a configuration in which a DC power produced by renewable energy 10 is converted into AC power through a DC / AC converter 20 and then supplied to commercial power 30.

상기 독립형은 도 2에 나타낸 바와 같이 신재생 에너지(10)에서 생산된 직류전원을 DC/DC 컨버터(40)를 통하여 안정적인 레벨의 직류전원으로 변환한 후 배터리(50)에 저장하거나 DC/AC 컨버터(20)를 통과하여서 교류 전원으로 변환한 후 부하(60)로 공급하는 구성을 갖는다.As shown in FIG. 2, the DC power generated by the renewable energy 10 is converted into DC power having a stable level through the DC / DC converter 40 and then stored in the battery 50 or the DC / AC converter. It passes through 20 and converts it into AC power, and supplies it to the load 60. FIG.

도 2의 경우 신재생 에너지(10)에서 발생하는 전력이 감소하거나 차단되면, 배터리(50)에 저장된 전원이 DC/AC 컨버터(20)를 통하여 교류 전원으로 변환하여 부하로 공급될 수 있다.In the case of FIG. 2, when power generated from the renewable energy 10 is reduced or cut off, power stored in the battery 50 may be converted into AC power through the DC / AC converter 20 and supplied to a load.

도 1 및 도 2와 같이, 종래의 신재생 에너지를 이용한 전원 공급 장치는 전원을 변환하는 DC/AC 컨버터(20)가 전원을 일방향으로만 공급하도록 구성된다. 그러므로 신재생 에너지를 이용하여 생산된 전원을 상용전원 또는 부하로 각각 공급하여야 하는 문제점이 있었다.1 and 2, the conventional power supply using renewable energy is configured such that the DC / AC converter 20 for converting the power supply the power only in one direction. Therefore, there has been a problem in that power supplied by using renewable energy must be supplied to commercial power or load, respectively.

또한, 상용전원을 통하여 공급되는 전원이 급격한 무효전력의 변화, SAG, 역율, 고조파에 의하여 불안정할 경우에는 전원을 안정적으로 공급하지 못하게 되는 등의 문제점이 있었다.In addition, when the power supplied through the commercial power is unstable due to a sudden change in reactive power, SAG, power factor, harmonics, there was a problem such as not being able to supply the power stably.

이를 방지하기 위하여 종래에는 상용전원(30)에 무효전력보상기, 역률보상기, SAG보상기 및 고조파보상기를 별도로 설치하는 경우도 있으나, 이때에는 설비 비용이 증가하게 되는 문제점이 있었다.In order to prevent this, conventionally, the reactive power compensator, the power factor compensator, the SAG compensator and the harmonic compensator may be separately installed in the commercial power supply 30, but there is a problem in that the facility cost increases.

또한 종래에는 독립형과 연계형이 각각 구분되어 있으므로 신재생 에너지를 효과적으로 활용하는데 한계가 있었다.
In addition, since the independent type and the linked type are separated in the related art, there is a limit in effectively utilizing renewable energy.

본 발명은 상기한 문제점을 해결하기 위하여 발명한 것으로서, 그 목적은 신재생 에너지에서 발생하는 전력을 배터리에 공급함은 물론 상용전원과 배터리의 사이에 전원을 양방향으로 공급할 수 있는 양방향 컨버터를 설치하여 상용전원을 배터리로 공급하거나 신재생 에너지에서 발생된 전력을 상용전원으로 공급하는 것으로서, 신재생 에너지에서 발생된 전력을 효율적으로 활용함과 동시에 불안정한 상용전원을 신속하게 안정화 시킬 수 있는 신재생 에너지 연계형 전력 안정화 장치를 제공함에 있다.
The present invention has been invented to solve the above problems, the purpose of which is to supply the power generated from renewable energy to the battery, as well as to install a bi-directional converter that can supply power in both directions between the commercial power source and the battery commercial By supplying power to the battery or supplying power generated from renewable energy to commercial power, it is a renewable energy-linked type that can efficiently utilize the power generated from renewable energy and stabilize the unstable commercial power quickly. It is to provide a power stabilization device.

상기 목적을 해결하기 위한 본 발명의 특징적인 구성은 신재생 에너지를 이용하여 생산된 직류전원을 직류전원으로 변환하는 DC/DC 컨버터; 상기 DC/DC 컨버터의 출력 전원을 저장하는 배터리; 발전기에서 생산된 교류전원을 직류전원으로 변환하여 배터리로 공급하는 AC/DC 컨버터; 상기 DC/DC 컨버터의 출력 전원 또는 배터리에 충전된 전원을 교류 전원으로 변환하여 상용전원으로 공급하고, 상용전원의 교류 전원을 직류 전원으로 변환하여 배터리 또는 상용전원으로 공급하도록 양방향으로 전원이 공급되는 양방향 컨버터; 상기 양방향 컨버터의 전원 공급방향 및 전원의 역률, SAG 및 고조파를 검출하고, 양방향 컨버터의 출력 전원이 안정화 되도록 역률, SAG 및 고조파를 보상하는 제어부가 포함된 것이다.A characteristic configuration of the present invention for solving the above object is a DC / DC converter for converting the DC power produced by using renewable energy to DC power; A battery storing an output power of the DC / DC converter; An AC / DC converter which converts AC power produced by the generator into DC power and supplies the battery to the battery; Power is supplied in both directions to convert the output power of the DC / DC converter or the power charged in the battery into AC power and supply it to commercial power, and convert the AC power of commercial power into DC power and supply the battery or commercial power. Bidirectional converter; The control unit detects a power supply direction of the bidirectional converter, power factor of the power source, SAG and harmonics, and compensates the power factor, SAG and harmonics so that the output power of the bidirectional converter is stabilized.

이와 같이 본 발명은 신재생 에너지 및 발전기에서 발생되는 전력을 배터리에 공급함은 물론, 상용전원과 배터리의 사이에 전원을 양방향으로 공급할 수 있는 양방향 컨버터를 설치하여 상용전원을 배터리로 공급하거나 신재생 에너지 및 발전기에서 발생된 전력을 상용전원으로 공급하는 것으로서, 전력을 효율적으로 활용함과 동시에 불안정한 상용전원을 신속하게 안정화 시킬 수 있는 특유의 효과가 있다.As described above, the present invention supplies the power generated from the renewable energy and the generator to the battery, and installs a bidirectional converter capable of bidirectionally supplying the power between the commercial power source and the battery to supply the commercial power to the battery or the renewable energy. And by supplying the power generated by the generator to the commercial power, there is a unique effect that can effectively stabilize the unstable commercial power while utilizing the power efficiently.

도 1은 종래의 신재생 에너지 연계형을 나타낸 개략도.
도 2는 종래의 신재생 에너지 독립형을 나타낸 개략도.
도 3은 본 발명에 따른 신재생 에너지 연계형 전력 안정화 장치를 나타낸 개략도.
도 4 내지 도 7은 본 발명에 따른 신재생 에너지 연계형 전력 안정화 장치의 전력 흐름을 나타낸 개략도.
1 is a schematic diagram showing a conventional renewable energy-linked type.
Figure 2 is a schematic diagram showing a conventional renewable energy independent type.
Figure 3 is a schematic diagram showing a renewable energy-linked power stabilization apparatus according to the present invention.
4 to 7 is a schematic view showing the power flow of the renewable energy-linked power stabilization apparatus according to the present invention.

이하 본 발명의 실시 예를 첨부된 도면을 참조해서 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 신재생 에너지 연계형 전력 안정화 장치를 나타낸 개략도이고, 도 4 내지 도 7은 본 발명에 따른 신재생 에너지 연계형 전력 안정화 장치의 전력 흐름을 나타낸 개략도이다.Figure 3 is a schematic diagram showing a renewable energy-linked power stabilization apparatus according to the present invention, Figures 4 to 7 is a schematic diagram showing the power flow of the renewable energy-linked power stabilization apparatus according to the present invention.

여기에서 참조되는 바와 같이 본 발명에 따른 신재생 에너지 연계형 전력 안정화 장치는 신재생 에너지(100)를 이용하여 생산된 불안정한 레벨의 직류전원을 안정화된 직류전원으로 변환하는 DC/DC 컨버터(110)가 마련되어 있다.As described herein, the renewable energy-linked power stabilization apparatus according to the present invention includes a DC / DC converter 110 for converting an unstable level DC power produced by using renewable energy 100 into a stabilized DC power source. Is provided.

상기 DC/DC 컨버터(110)의 출력측에는 출력 전원을 저장하는 배터리(150)가 연결되어 있고, 상기 배터리(150)에는 발전기(170)에서 생산된 교류 전원을 직류 전원으로 변환하여 공급하는 AC/DC 컨버터(160)가 연결되어 있다.A battery 150 for storing output power is connected to an output side of the DC / DC converter 110, and the battery 150 converts AC power produced by the generator 170 into DC power to supply AC / DC power. DC converter 160 is connected.

그리고 상기 DC/DC 컨버터(110)의 출력측에는 DC/DC 컨버터(110)의 출력 전원 또는 배터리(150)에 충전된 전원을 교류 전원으로 변환하여 상용전원(130)으로 공급하거나 상용전원(130)의 교류 전원을 직류 전원으로 변환하여 배터리(150)로 공급하도록 양방향으로 전원이 공급되는 양방향 컨버터(120)가 연결되어 있다.On the output side of the DC / DC converter 110, the output power of the DC / DC converter 110 or the power charged in the battery 150 is converted into AC power and supplied to the commercial power 130 or the commercial power 130. The bi-directional converter 120 is connected to the bi-directional power supply to convert the AC power of the DC power supply to the DC power supply to the battery 150.

한편, 상기 양방향 컨버터(120)를 통과하는 전원 공급방향 및 전원의 역률, SAG 및 고조파를 검출하고, 양방향 컨버터(120)의 출력 전원이 안정화 되도록 역률, SAG 및 고조파를 보상하는 제어부(140)가 마련되어 있다.On the other hand, the controller 140 for detecting the power supply direction and power factor, SAG and harmonics of the power supply direction passing through the bidirectional converter 120, and compensates the power factor, SAG and harmonics so that the output power of the bidirectional converter 120 is stabilized. It is prepared.

이와 같이 구성된 본 발명을 상세히 설명하면 다음과 같다.Referring to the present invention configured as described in detail as follows.

먼저, 상용전원(130)을 통하여 안정적인 전원이 공급될 경우에는 도 4에 나타낸 바와 같이 상용전원(130)으로 공급되는 교류 전원은 양방향 컨버터(120)를 통하여 직류전원으로 변환 된 후 배터리(150)에 충전된다.First, when stable power is supplied through the commercial power supply 130, the AC power supplied to the commercial power supply 130 is converted into DC power through the bidirectional converter 120 as shown in FIG. 4, and then the battery 150. Is charged.

이때 양방향 컨버터(120)에 연결된 제어부(140)는 상용전원(130)을 통하여 공급되는 교류전원의 역률, SAG 및 고조파를 검출하고, 양방향 컨버터(120)의 출력측으로 안정적인 전원이 출력되도록 역률, SAG 및 고조파를 보상하게 된다.At this time, the control unit 140 connected to the bi-directional converter 120 detects the power factor, SAG and harmonics of the AC power supplied through the commercial power supply 130, and the power factor, SAG to output stable power to the output side of the bidirectional converter 120. And harmonics.

한편, 신재생 에너지(100)에 의해서 발생된 전력은 도 5에 나타낸 바와 같이 DC/DC 컨버터(110)를 통과하면서 직류전원으로 변환된 후 배터리(150)에 충전된다.On the other hand, the power generated by the renewable energy 100 is converted to DC power while passing through the DC / DC converter 110, as shown in Figure 5 is charged in the battery 150.

또한, 발전기(170)에서 발생한 교류전원은 AC/DC 컨버터(160)를 통과하면서 직류전원으로 변환된 후 배터리(150)에 충전된다.In addition, the AC power generated by the generator 170 is converted to DC power while passing through the AC / DC converter 160 is charged in the battery 150.

그리고, 상용전원(130)을 통하여 공급되는 전력이 불안정할 경우에는 도 6에 나타낸 바와 같이 신재생 에너지(100)에 의해서 발생된 전력은 DC/DC 컨버터(110)를 통과하면서 직류전원으로 변환되고 양방향 컨버터(120)를 통과하면서 교류전원으로 변환된 후 상용전원(130)으로 공급된다.When the power supplied through the commercial power supply 130 is unstable, as shown in FIG. 6, the power generated by the renewable energy 100 is converted into the DC power while passing through the DC / DC converter 110. After passing through the bidirectional converter 120 is converted into AC power is supplied to the commercial power (130).

또는, 신재생 에너지(100)에 의해서 발생한 전력 또는 발전기(170)에서 발생한 전력이 배터리(150)로 공급하지 않을 경우 즉, 잉여 전력이 발생할 경우에는 도 6에 나타낸 바와 같이 신재생 에너지(100) 및 발전기(170)에 의해서 발생한 전력은 양방향 컨버터(120)를 통과하면서 교류전원으로 변환된 후 상용전원(130)으로 공급된다. Alternatively, when the power generated by the renewable energy 100 or the power generated by the generator 170 is not supplied to the battery 150, that is, when surplus power is generated, the renewable energy 100 is illustrated in FIG. 6. And the power generated by the generator 170 is converted to AC power while passing through the bi-directional converter 120 is supplied to the commercial power 130.

상술한 바와 같이 신재생 에너지(100)와 발전기(170)에 의해서 발생한 전력이 상용전원(130)으로 공급될 때 양방향 컨버터(120)에 연결된 제어부(140)는 상용전원(130)으로 공급되는 교류전원의 역률, SAG 및 고조파를 검출하고, 상용전원(130)으로 안정적인 전원이 출력되도록 역률, SAG 및 고조파를 보상하게 된다.As described above, when the power generated by the renewable energy 100 and the generator 170 is supplied to the commercial power supply 130, the control unit 140 connected to the bidirectional converter 120 is supplied to the commercial power supply 130. The power factor, SAG, and harmonics of the power source are detected, and the power factor, SAG, and harmonics are compensated to output a stable power source to the commercial power source 130.

즉, 상용전원(130)으로 공급되는 전원은 불안정한 원인(무효전력, SAG, 역률, 고조파 등)이 보상된 상태이므로 상용전원(130)을 안정화시키게 되는 것이다.That is, the power supplied to the commercial power 130 is to stabilize the commercial power 130 because the unstable cause (reactive power, SAG, power factor, harmonics, etc.) is compensated for.

또는 신재생 에너지(100)에 의해서 전력이 발생되지 않는 상태에서 상용전원(130)을 통하여 공급되는 전력이 불안정할 경우에는 도 7에 나타낸 바와 같이 배터리(150)에 저장된 전력은 양방향 컨버터(120)를 통과하면서 교류전원으로 변환 된 후 상용전원(130)으로 공급된다.Alternatively, when the power supplied through the commercial power supply 130 is unstable in a state in which power is not generated by the renewable energy 100, as shown in FIG. 7, the power stored in the battery 150 is bidirectional converter 120. After passing through the AC power is converted to commercial power 130 is supplied.

이때 양방향 컨버터(120)에 연결된 제어부(140)는 상용전원(130)으로 공급되는 교류전원의 역률, SAG 및 고조파를 검출하고, 상용전원(130)으로 안정적인 전원이 출력되도록 역률, SAG 및 고조파를 보상하게 된다.At this time, the control unit 140 connected to the bidirectional converter 120 detects the power factor, SAG, and harmonics of the AC power supplied to the commercial power supply 130, and outputs the power factor, SAG, and harmonics so that stable power is output to the commercial power supply 130. To compensate.

즉, 상용전원(130)으로 공급되는 전원은 불안정한 원인(무효전력, SAG, 역률, 고조파 등)이 보상된 상태이므로 상용전원(130)을 안정화시키게 되는 것이다.That is, the power supplied to the commercial power 130 is to stabilize the commercial power 130 because the unstable cause (reactive power, SAG, power factor, harmonics, etc.) is compensated for.

상술한 바와 같은 본 발명에 의하면, 상용전원(130)과 신재생 에너지(100)의 사이에 양방향 컨버터(120)를 설치하여 상용전원(130)을 배터리(150)로 공급함은 물론 신재생 에너지(100) 및 발전기(170)에서 발생된 전력을 상용전원(130)으로 공급하여 상용전원(130)의 불안정한 상태를 신속하게 안정화시킴은 물론 신재생 에너지에서 발생되는 잉여 전력을 상용전원(130)으로 공급하여 전력을 효과적으로 활용할 수 있게 되는 것이다.
According to the present invention as described above, the bidirectional converter 120 is installed between the commercial power source 130 and the renewable energy 100 to supply the commercial power source 130 to the battery 150 as well as renewable energy ( 100) and supply the power generated from the generator 170 to the commercial power supply 130 to quickly stabilize the unstable state of the commercial power supply 130, as well as surplus power generated from renewable energy to the commercial power supply 130 By supplying the power can be used effectively.

100 : 신재생 에너지 110 : DC/DC 컨버터
120 : 양방향 컨버터 130 : 상용전원
140 : 제어부 150 : 배터리
160 : AC/DC 컨버터 170 : 발전기
100: renewable energy 110: DC / DC converter
120: bidirectional converter 130: commercial power
140: control unit 150: battery
160: AC / DC converter 170: generator

Claims (4)

신재생 에너지를 이용하여 생산된 직류전원을 직류전원으로 변환하는 DC/DC 컨버터(110);
상기 DC/DC 컨버터(110)의 출력 전원을 저장하는 배터리(150); 및
상기 DC/DC 컨버터(110)의 출력 전원 또는 배터리(150)에 충전된 전원을 교류 전원으로 변환하여 상용전원(130)으로 공급하고, 상용전원(130)의 교류 전원을 직류 전원으로 변환하여 배터리(150)로 공급하도록 양방향으로 전원이 공급되는 양방향 컨버터(120);를 포함하는 신재생 에너지 연계형 전력 안정화 장치에 있어서,
발전기(170)에서 생산된 교류전원을 직류전원으로 변환하여 상기 배터리(150) 및 상기 양방향 컨버터(120) 중 적어도 하나 이상으로 공급하는 AC/DC 컨버터(160); 및
상기 양방향 컨버터(120)의 전원 공급방향 및 전원의 역률, SAG 및 고조파를 검출하고, 양방향 컨버터(120)의 출력 전원이 안정화 되도록 역률, SAG 및 고조파를 보상하는 제어부(140)를 포함함을 특징으로 하는 신재생 에너지 연계형 전력 안정화 장치.
A DC / DC converter 110 for converting the DC power produced by using renewable energy into DC power;
A battery 150 storing the output power of the DC / DC converter 110; And
The output power of the DC / DC converter 110 or the power charged in the battery 150 is converted into AC power to supply to the commercial power 130, and converts the AC power of the commercial power 130 to DC power to the battery In the renewable energy-linked power stabilization apparatus comprising a; bi-directional converter 120 is supplied in both directions to supply to the 150,
An AC / DC converter 160 converting AC power produced by the generator 170 into DC power to supply at least one of the battery 150 and the bidirectional converter 120; And
And a controller 140 that detects the power supply direction of the bidirectional converter 120 and the power factor of the power source, SAG, and harmonics, and compensates the power factor, SAG, and harmonics so that the output power of the bidirectional converter 120 is stabilized. Renewable energy-linked power stabilization device.
제1 항에 있어서,
상기 상용전원(130)이 안정적인 경우 상기 상용전원(130)의 전원을 상기 양방향 컨버터(120)를 통하여 상기 배터리(150)로 저장하고,
상기 상용전원(130)이 불안정한 경우 상기 DC/DC 컨버터(110)와 상기 배터리(150) 중 어느 하나로부터 전원이 상기 양방향 컨버터(120)를 통하여 상기 상용전원(130)으로 공급되며,
상기 배터리(150)에 전원을 공급하지 않을 경우 상기 DC/DC 컨버터(110)의 전원을 상기 양방향 컨버터(120)를 통하여 상기 상용 전원으로 공급됨을 특징으로 하는 신재생 에너지 연계형 전력 안정화 장치.
The method according to claim 1,
When the commercial power 130 is stable, the power of the commercial power 130 is stored in the battery 150 through the bidirectional converter 120,
When the commercial power 130 is unstable, power is supplied to the commercial power 130 through the bidirectional converter 120 from any one of the DC / DC converter 110 and the battery 150,
Renewable energy-linked power stabilization device, characterized in that the power supply of the DC / DC converter 110 is supplied to the commercial power through the bi-directional converter (120) when power is not supplied to the battery (150).
삭제delete 제1 항에 있어서,
상기 상용전원(130)이 안정적인 경우 상기 상용전원(130)의 전원을 상기 양방향 컨버터(120)를 통하여 상기 배터리(150)로 저장하고,
상기 상용전원(130)이 불안정한 경우 상기 DC/DC 컨버터(110)와 상기 AC/DC 컨버터(160) 및 상기 배터리(150) 중 어느 하나로부터 전원이 상기 양방향 컨버터(120)를 통하여 상기 상용전원(130)으로 공급되며,
상기 배터리(150)에 전원을 공급하지 않을 경우 상기 DC/DC 컨버터(110)와 상기 AC/DC 컨버터(160) 중 적어도 어느 하나의 전원을 상기 양방향 컨버터(120)를 통하여 상기 상용 전원으로 공급함을 특징으로 하는 신재생 에너지 연계형 전력 안정화 장치.
1st ≪
When the commercial power 130 is stable, the power of the commercial power 130 is stored in the battery 150 through the bidirectional converter 120,
When the commercial power supply 130 is unstable, power is supplied from one of the DC / DC converter 110, the AC / DC converter 160, and the battery 150 through the bidirectional converter 120. 130),
When no power is supplied to the battery 150, at least one of the DC / DC converter 110 and the AC / DC converter 160 is supplied to the commercial power through the bidirectional converter 120. Renewable energy-linked power stabilization device characterized in that.
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EP3001528A1 (en) * 2014-09-29 2016-03-30 Siemens Aktiengesellschaft Power plant with a constant electrical power output, method for providing a constant electrical power output by using the power plant and method for designing a battery for the power plant

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KR20110066646A (en) * 2009-12-11 2011-06-17 삼성에스디아이 주식회사 An apparatus and a controlling method for storing power
KR20110071157A (en) * 2009-12-21 2011-06-29 한국전기연구원 Integrated control apparatus and method for hybrid type wind turbine system

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