KR101506955B1 - Power control device for wind power generation system using wire-wounded reistor - Google Patents

Power control device for wind power generation system using wire-wounded reistor Download PDF

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KR101506955B1
KR101506955B1 KR1020130121661A KR20130121661A KR101506955B1 KR 101506955 B1 KR101506955 B1 KR 101506955B1 KR 1020130121661 A KR1020130121661 A KR 1020130121661A KR 20130121661 A KR20130121661 A KR 20130121661A KR 101506955 B1 KR101506955 B1 KR 101506955B1
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South Korea
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wind
power
power generation
generation system
turbine
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KR1020130121661A
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Korean (ko)
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김영부
추영열
이상진
최현덕
박영일
정성희
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동명대학교산학협력단
주식회사 네오텍
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/30—Control parameters, e.g. input parameters
    • F05B2270/32—Wind speeds
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

The present invention relates to a power control device for a small wind power generation system using wire sound resistance having an improved structure such that the efficiency of producing electricity can be improved. According to the present invention, the power control device for a small wind power generation system using wire sound resistance relates to a power control device for a wind power generation system receiving electricity produced by a wind power equipment including a turbine, and converting the received electricity to a voltage necessary to charge a battery and supply the converted voltage to the battery. The power control device comprises: a variable resistance unit changing into different resistance values; a sensor unit measuring one piece of data of a wind speed and a rotating speed of the turbine; and a control unit determining a resistance value of the variable resistance unit in accordance with the data measured by the sensor unit.

Description

권선저항을 이용한 소형 풍력발전시스템용 전원제어장치{Power control device for wind power generation system using wire-wounded reistor}TECHNICAL FIELD [0001] The present invention relates to a power control device for a wind power generation system using a wind resistance,

본 발명은 권선저항을 이용한 소형 풍력발전시스템용 전원제어장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control apparatus for a small wind power generation system using a winding resistance.

풍력을 이용하여 전기를 생산하는 풍력발전시스템에 관해서는 공개특허 10-2013-0102274호 등을 비롯하여 많은 특허가 공개된 바 있다. 그리고, 이와 같은 풍력발전기를 가동하여 얻은 전력은 풍속에 따라 시시각각 변화하므로 매우 불안정한 에너지이다. 따라서 획득한 전력을 직접 이용하기는 어려우므로 발생한 전력을 배터리에 충전하여 축적된 전력을 이용한다. A number of patents have been disclosed for a wind power generation system that uses wind power to produce electricity, as disclosed in Japanese Patent Laid-Open No. 10-2013-0102274. The power obtained by operating such a wind turbine is very unstable because it varies with the wind speed. Therefore, it is difficult to directly use the acquired power, so the accumulated power is used by charging the generated power to the battery.

한편, 풍력발전기를 항상 최적 조건으로 동작시키기 위해 입력전압의 세제곱에 비례하여 입력전류가 흐르도록 하여야 하지만, 엄밀하게 세제곱 특성을 만들기는 어려운 일이다. 또한, 풍력발전기에 의해 생산된 전력을 배터리에 충전함에 있어서도, 생산되는 전력 자체가 불안정하면 저장 효율 역시 저하되는 문제점이 있다. On the other hand, in order to operate the wind turbine at optimum conditions at all times, the input current should flow in proportion to the cube of the input voltage, but it is difficult to form the cubic characteristic strictly. In addition, even when the power generated by the wind turbine generator is charged into the battery, the storage efficiency also deteriorates when the generated power itself becomes unstable.

선행특허1 : 대한민국공개특허 10-2013-0102274호(명칭 : 풍력저장발전시스템)Prior Art 1: Korean Patent Laid-Open No. 10-2013-0102274 (name: wind power generation and storage system)

본 발명은 상기한 문제점을 해결하기 위하여 안출된 것으로, 본 발명의 목적은 전력생산효율이 향상되도록 구조가 개선된 권선저항을 이용한 소형 풍력발전시스템용 전원제어장치를 제공하는 것이다.SUMMARY OF THE INVENTION It is an object of the present invention to provide a power control apparatus for a small wind power generation system using a winding resistance improved in structure to improve power production efficiency.

본 발명에 따른 권선저항을 이용한 소형 풍력발전시스템용 전원제어장치는 터빈을 포함하는 풍력발전설비에서 생산된 전력을 공급받으며, 상기 공급받은 전력을 배터리의 충전에 필요한 전압으로 변환하여 상기 배터리로 공급하는 풍력발전시스템용 전원제어장치에 있어서, 서로 다른 저항값으로 변경되는 가변저항부와, 상기 터빈의 회전속도 및 풍속 중 적어도 하나의 데이터를 측정하는 센서부와, 상기 센서부에서 측정된 데이터에 따라 상기 가변저항부의 저항값을 결정하는 제어부를 포함하는 것을 특징을 특징으로 한다.A power supply control apparatus for a small wind power generation system using a winding resistance according to the present invention receives power generated by a wind power generation facility including a turbine, converts the supplied power into a voltage necessary for charging the battery, And a control unit for controlling at least one of a rotational speed and a wind speed of the turbine, and a control unit for controlling at least one of a rotational speed and a wind speed of the turbine, And a control unit for determining a resistance value of the variable resistance unit.

본 발명에 따르면, 상기 센서부는 상기 회전속도 데이터 및 상기 풍속 데이터를 측정하며, 상기 제어부는 상기 회전속도 데이터와 상기 풍속 데이터를 비교하여 상기 센서부의 오작동 여부를 감지하는 것이 바람직하다.According to the present invention, the sensor unit measures the rotational speed data and the wind speed data, and the controller compares the rotational speed data and the wind speed data to detect whether the sensor unit malfunctions.

또한, 본 발명에 따르면 상기 센서부는 온도 및 습도를 더 측정하는 것이 바람직하다.Further, according to the present invention, it is preferable that the sensor unit further measures temperature and humidity.

본 발명에 따르면, 풍속에 따라 저항을 변경함으로써 일정하고 높은 전력을 얻을 수 있다.According to the present invention, constant and high power can be obtained by changing the resistance according to the wind speed.

도 1은 본 발명의 일 실시예에 따른 풍력발전시스템의 개략적인 구성도이다.
도 2는 본 발명의 일 실시예에 따른 터빈의 개략적인 사시도이다.
도 3 및 도 4는 저항과 전력의 관계를 나타내는 그래프이다.1 is a schematic block diagram of a wind power generation system according to an embodiment of the present invention.
2 is a schematic perspective view of a turbine according to one embodiment of the present invention.
3 and 4 are graphs showing the relationship between resistance and power.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 따른 풍력발전시스템 및 풍력발전시스템용 전원제어장치에 관하여 설명한다.Hereinafter, a wind power generation system and a power control system for a wind power generation system according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 풍력발전시스템의 개략적인 구성도이며, 도 2는 본 발명의 일 실시예에 따른 터빈의 개략적인 사시도이며, 도 3 및 도 4는 저항과 전력의 관계를 나타내는 그래프이다.2 is a schematic perspective view of a turbine according to an embodiment of the present invention, and Figs. 3 and 4 are diagrams showing a relationship between a resistance and a power FIG.

도 1 내지 도 4를 참조하면, 본 실시예에 따른 풍력발전시스템(1000)은 풍력발전설비와, 배터리(300)와, 풍력발전시스템용 전원제어장치(100)를 포함한다.1 to 4, the wind power generation system 1000 according to the present embodiment includes a wind power generation facility, a battery 300, and a power supply control apparatus 100 for a wind power generation system.

풍력발전설비는 풍력을 이용하여 전기를 생산하는 것으로, 이와 같은 풍력발전설비는 도 2에 도시된 바와 같이 풍력에 의해 회전가능하도록 다수의 블레이드를 가지는 터빈(200)을 포함한다. 터빈(200)의 구조 및 전기가 생산되는 원리는 이미 공지되어 있으므로, 상세한 설명은 생략한다.The wind power generation facility generates electricity using wind power. Such a wind power generation facility includes a turbine 200 having a plurality of blades so as to be rotatable by wind power as shown in FIG. Since the structure of the turbine 200 and the principle of electricity generation are already known, a detailed description thereof will be omitted.

배터리(300)는 풍력발전설비에 의해 생산된 전력을 저장하기 위한 것이다. 배터리는 후술하는 제어장치를 통해 풍력발전설비에 의해 생산된 전력을 전달받아 이를 저장한다.The battery 300 is for storing the electric power produced by the wind turbine. The battery receives and stores the electric power produced by the wind power generation facility through a control device described later.

풍력발전시스템용 전원제어장치(100)는 풍력발전설비에서 생산된 전력을 배터리에 전달하는 것으로, 이때 생산된 전력을 배터리(300) 충전에 적합한 전압으로 변환한다. The power control device 100 for a wind power generation system transfers electric power generated by a wind power generation facility to a battery, and converts the generated electric power into a voltage suitable for charging the battery 300.

먼저, 본 발명의 핵심적 특징에 관하여 설명하면, 풍력발전시스템은 풍력에 의하여 터빈(200)을 돌림으로써 전기에너지를 생산하는 것으로, 이때 풍속은 시시각각으로 변하게 되고, 이에 따라 전력 생산량도 항상 변하게 된다. 그런데, 도 3 및 도 4에 도시된 바와 같이, 동일한 풍속을 이용하여 전력을 생산하더라도 인가되는 저항값에 의해 생산되는 전력량이 조금씩 변경되게 된다. 즉, 도 3에 도시된 바와 같이 풍속이 5m/s인 경우에는 저항값이 18.84일 때 최대전력량을 얻을 수 있고, 도 4에 도시된 바와 같이 풍속이 6m/s인 경우에는 저항값이 11.38일 때 최대전력량을 얻을 수 있다. 그리고, 비록 명세서상에 나타내지는 않았으나, 다른 풍속(7m/s, 8m/s 등)에서도 저항값에 따라 전력량이 변화되는 것이 확인되었다. 물론, 풍력발전설비의 스펙에 따라 각 풍속별 최대 전력이 생산되는 저항값의 크기는 달라질 수 있으나, 중요한 점은 동일 풍속이라도 저항값에 의해 생산되는 전력량의 값이 변경된다는 점이다. 이에, 본 발명에서는 사전 실험을 통해 풍속(또는 회전속도)별로 저항에 따른 전력량을 측정하고, 이를 활용하여 풍속에 따라 저항값을 변경함으로써 최대 전력을 생산하고자 한다.First, the key features of the present invention will be described. The wind power generation system generates electric energy by turning the turbine 200 by wind power. At this time, the wind speed is changed instantaneously, and accordingly, the electric power production amount also changes. However, as shown in FIGS. 3 and 4, even when power is produced using the same wind speed, the amount of power produced by the applied resistance value is slightly changed. 3, when the wind speed is 5 m / s, the maximum power amount is obtained when the resistance value is 18.84, and when the wind speed is 6 m / s as shown in FIG. 4, the resistance value is 11.38 The maximum amount of power can be obtained. Also, although not shown in the specification, it was confirmed that the power amount changes depending on the resistance value even at different wind speeds (7 m / s, 8 m / s, etc.). Of course, the magnitude of the resistance produced by the maximum power per wind speed can vary depending on the specification of the wind power plant, but the important point is that the value of the power produced by the resistance value changes even at the same wind speed. Accordingly, in the present invention, it is desired to produce a maximum electric power by measuring the amount of electric power according to the resistance for each wind speed (or rotation speed) through a preliminary experiment, and by changing the resistance value according to the wind speed.

본 실시예에 따른 풍력발전시스템용 전원제어장치(100)는 가변저항부(10)와, 센서부(20)와, 제어부(30)를 포함한다.The power supply control apparatus 100 for a wind power generation system according to the present embodiment includes a variable resistance unit 10, a sensor unit 20, and a control unit 30.

가변저항부(10)는 저항값이 변경될 수 있는 공지의 구성으로, 본 실시예의 경우 5Ω, 8Ω, 10Ω, 20Ω의 4개의 저항을 조합하여 가변저항부를 구성하였다.The variable resistor unit 10 is a known configuration in which the resistance value can be changed. In this embodiment, the variable resistor unit is formed by combining four resistors of 5?, 8 ?, 10? And 20?.

센서부(20)는 터빈의 회전속도 및 풍속 중 적어도 하나의 데이터를 측정하기 위한 것으로, 본 실시예의 경우 센서부는 터빈의 회전속도와 풍속 모두를 측정한다. 즉, 도 2에 도시된 바와 같이 센서부는 터빈에 설치되어 회전속도를 측정하는 RPM 센서와, 풍속을 측정하는 풍속계를 포함한다. 또한, 센서부는 온도를 측정하는 온도 센서와, 습도를 측정하는 습도 센서를 포함하여 구성될 수 있다.The sensor unit 20 measures at least one of the rotational speed and the wind speed of the turbine. In this embodiment, the sensor unit measures both the rotational speed and the wind speed of the turbine. That is, as shown in FIG. 2, the sensor unit includes an RPM sensor installed in the turbine and measuring the rotational speed, and an anemometer for measuring the wind speed. The sensor unit may be configured to include a temperature sensor for measuring the temperature and a humidity sensor for measuring the humidity.

제어부(30)는 센서부(20)와 유선 또는 무선의 방식으로 연결되며, 센서부로부터 풍속, 회전속도, 습도 및 온도 등의 데이터를 전송받는다. 그리고, 제어부는 전송받은 풍속 또는 회전속도 데이터에 따라 가변저항부의 저항값을 변경하며, 이에 따라 앞서 설명한 바와 같이 최대 전력을 생산할 수 있다. 이때, 앞서 도 3 및 도 4를 설명할 때에는 풍속별 저항값에 따른 전력량의 관계를 이용하여 최대 전력이 출력되도록 저항값을 결정하였다. 그런데, 풍속은 터빈의 회전속도와 매우 높은 관련성이 있는 데이터이므로, 풍속이 아닌 터빈의 회전속도별로 저항값에 따른 전력량의 관계를 사전 실험을 통해 구하고, 이를 이용하여 센서부에서 측정된 터빈의 회전속도에 따라 저항값을 변경함으로써 최대 전력량을 얻을 수도 있다.The control unit 30 is connected to the sensor unit 20 in a wired or wireless manner and receives data such as wind speed, rotation speed, humidity, and temperature from the sensor unit. The control unit changes the resistance value of the variable resistance unit according to the received wind speed or rotation speed data, and thus can produce the maximum electric power as described above. 3 and 4, the resistance value is determined so that the maximum power is output by using the relationship of the amount of power according to the resistance value by the wind speed. However, since the wind speed is very closely related to the turbine rotation speed, the relationship between the amount of power according to the resistance value and the rotation speed of the turbine, not the wind speed, is obtained through a preliminary experiment. The maximum power can also be obtained by changing the resistance value according to the speed.

또한, 제어부는 센서부(20)의 오작동 여부를 감지하고, 이를 사용자가 확인할 수 있도록 신호를 주는 기능을 포함할 수 있다. 예를 들어, 제어부는 풍속 데이터와 회전속도 데이터를 비교한다. 이때, 풍속계와 RPM 센서가 모두 정상적이라면, 두 데이터 값이 서로 상관관계를 가지게 되지만, 둘 중 하나가 오작동이 되는 경우라면 두 데이터 값이 상관관계를 가지지 못하게 되며(예를 들어, 풍속은 20m/s인데 RPM은 0), 이를 통해 풍속계와 RPM 센서의 오작동 여부를 확인할 수 있다.In addition, the control unit may include a function of detecting a malfunction of the sensor unit 20 and giving a signal to the user so that the user can confirm the malfunction. For example, the control unit compares the wind speed data and the rotation speed data. In this case, if both the anemometer and the RPM sensor are normal, the two data values are correlated with each other, but if one of them is malfunctioning, the two data values will not be correlated (for example, s, RPM is 0), so that it can check whether the anemometer and RPM sensor are malfunctioning.

또한, 도 1에 도시된 바와 같이 풍력발전시스템용 전원제어장치는 Boost & Back 변환기(Converter)를 포함하며, 이때 Boost와 Back의 기준은 DC +14.8V의 전압을 기준으로 하며, 초기에 필요한 전력량은 12W 이상으로 출력되는 발전량으로 Boost회로가 구동하게 된다. 전압을 기준으로 DC +14.8V이상이 될 경우 일정시간이 지나면 Back 기능이 사용되며, 충전되는 전력량을 일정하게 출력되도록 프로세서가 PWM 신호출력으로 2차 측의 전압검출 값의 변화를 감지하여 계속적인 일정한 충전 출력을 내어주게 된다.As shown in FIG. 1, the power control device for a wind power system includes a Boost & Back converter. In this case, the reference of Boost and Back is based on a voltage of DC + 14.8 V, The booster circuit is driven by the amount of power output over 12W. If DC + 14.8V or more based on the voltage is used, the back function is used after a predetermined time, and the processor detects the change in the voltage detection value of the secondary side by the PWM signal output so as to constantly output the amount of power to be charged, And gives a constant charging output.

또한, 풍력발전시스템용 전원제어장치는 환경에 따른 주변장치들의 오작동을 방지하고 겨울철 외부온도 급하강에 따른 동결&오작동을 대비하여 자체적으로 온도를 유지할 수 있도록 설계될 수 있다.Also, the power control device for the wind power system can be designed to prevent malfunction of peripheral devices according to environment and to maintain the temperature of itself in preparation for freezing & malfunction according to the fall of the outside temperature in winter.

상술한 바와 같이, 본 발명에 따르면 풍속 또는 회전속도에 따라 최적의 저항값으로 변경함으로써, 최대의 전력 생산량을 얻을 수 있다. As described above, according to the present invention, by changing to the optimum resistance value according to the wind speed or the rotation speed, the maximum electric power production amount can be obtained.

이상에서 본 발명의 바람직한 실시예에 대해 도시하고 설명하였으나, 본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the embodiment in which said invention is directed. It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

1000...풍력발전시스템 100...풍력발전시스템용 전원제어장치
10...가변저항부 20...센서부
30...제어부 200...터빈
300...배터리1000 ... Wind power system 100 ... Power controller for wind power system
10 ... variable resistor section 20 ... sensor section
30 ... controller 200 ... turbine
300 ... battery

Claims (3)

터빈을 포함하는 풍력발전설비에서 생산된 전력을 공급받으며, 상기 공급받은 전력을 배터리의 충전에 필요한 전압으로 변환하여 상기 배터리로 공급하는 풍력발전시스템용 전원제어장치에 있어서,
서로 다른 저항값으로 변경되는 가변저항부와,
상기 터빈의 회전속도 및 풍속 중 적어도 하나의 데이터를 측정하는 센서부와,
상기 터빈의 회전속도 또는 풍속 별로 상기 가변저항부의 저항값에 따라 생산되는 전력량에 대한 데이터가 저장되어 있으며, 상기 센서부에서 측정된 데이터에 따라 최대전력량이 생산되도록 상기 가변저항부의 저항값을 변경하는 제어부를 포함하며,
상기 센서부는 상기 회전속도 데이터 및 상기 풍속 데이터를 측정하며,
상기 제어부는 상기 회전속도 데이터와 상기 풍속 데이터를 비교하여 상기 센서부의 오작동 여부를 감지하는 것을 특징으로 하는 풍력발전시스템용 전원제어장치.1. A power supply controller for a wind power generation system, comprising: a power generation unit that receives power generated from a wind turbine including a turbine, converts the supplied power into a voltage necessary for charging the battery, and supplies the converted power to the battery,
A variable resistance portion which is changed to a different resistance value,
A sensor unit for measuring at least one of the rotational speed and the wind speed of the turbine,
Wherein the variable resistance unit changes the resistance value of the variable resistance unit so that the maximum amount of power is produced according to the data measured by the sensor unit And a control unit,
Wherein the sensor unit measures the rotational speed data and the wind speed data,
Wherein the controller compares the rotational speed data with the wind speed data to detect whether the sensor unit malfunctions. 삭제delete 제1항에 있어서,
상기 센서부는 온도 및 습도를 더 측정하는 것을 특징으로 하는 풍력발전시스템용 전원제어장치.The method according to claim 1,
Wherein the sensor unit further measures temperature and humidity.
KR1020130121661A 2013-10-14 2013-10-14 Power control device for wind power generation system using wire-wounded reistor KR101506955B1 (en)

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JP2002332950A (en) * 2001-05-07 2002-11-22 Yasuhide Kouchi Measuring device and specimen characteristic analyzing device
WO2005108784A1 (en) * 2004-05-07 2005-11-17 Mitsubishi Denki Kabushiki Kaisha Wind power generation evaluation system and prediction control service system for wind power generator
JP2010096121A (en) * 2008-10-17 2010-04-30 Nasu Denki Tekko Co Ltd Wind turbine generation type display system

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Publication number Priority date Publication date Assignee Title
JP2002332950A (en) * 2001-05-07 2002-11-22 Yasuhide Kouchi Measuring device and specimen characteristic analyzing device
WO2005108784A1 (en) * 2004-05-07 2005-11-17 Mitsubishi Denki Kabushiki Kaisha Wind power generation evaluation system and prediction control service system for wind power generator
JP2010096121A (en) * 2008-10-17 2010-04-30 Nasu Denki Tekko Co Ltd Wind turbine generation type display system

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