Abstract:
The present invention relates to a blade airfoil of an aerogenerator. More specifically, the present invention relates to the blade airfoil of the aerogenerator having the rear side in which an aerodynamic control device, which is inserted into a blade for controlling an aileron included on the rear of the blade of a large aerogenerator, can be inserted.
Abstract:
PURPOSE: A grid connection power system and streetlight using renewable energy, and a method of controlling the same are provided to generate electric power using renewable energy and provide the generated electric power to a streetlight, thereby reducing use of commercial electricity. CONSTITUTION: A grid connection power system using renewable energy comprises a load unit (110) operated by supplied power; a renewable energy unit (120) generating power using at least one of renewable energy resources for supplying the generated power to the load unit; an energy storage unit (140) storing the power generated by the renewable energy unit; a commercial electricity input unit (130) supplied with commercial electricity from the outside for supplying the commercial electricity to the load unit; and a control unit (150) controlling the energy storage unit and the commercial electricity input unit so that the stored power and the commercial electricity to the load unit is supplied to the load unit. [Reference numerals] (110) Load unit; (120) Renewable energy unit; (130) Commercial electricity input unit; (140) Energy storage unit; (150) Control unit; (152) Commercial electricity detection unit; (154) Electricity volume detection unit
Abstract:
본발명은계통연계형태양광발전시스템의고장검출진단장치및 그방법에관한것으로서, 태양광발전어레이및 태양광발전인버터를포함하는태양광발전시스템의정상상태또는고장상태를진단하는고장검출진단장치에의해수행되는계통연계형태양광발전시스템의고장검출진단방법에있어서, 상기태양광발전시스템의직류전력, 교류전력, 일사강도, 온도또는풍속값을포함하는운전데이터를저장하는성능데이터베이스에수집된상기일사강도, 직류전력및 교류전력의실측값을각각태양등가가동시간(Y), 태양광발전어레이등가가동시간(Y) 및태양광발전시스템등가가동시간(Y)으로변환하여산출하는단계; 상기등가가동시간(Y, Y, Y), 상기태양광발전어레이표면온도(T) 및상기태양광발전어레이직류전류(I)를기초로하여태양광발전어레이최대등가가동시간의실측값(Y), 태양광발전어레이최적등가가동시간의실측값(Y) 및태양광발전어레이온도보정후 등가가동시간의실측값(Y)을산출하는단계; 상기태양등가가동시간(Y)과상기태양광발전어레이표면온도(T) 및상기태양광발전어레이의직류전류의예측값(I)을기초로하여태양광발전어레이최적등가가동시간의예측값(Y), 태양광발전어레이온도보정후 등가가동시간의예측값(Y), 태양광발전어레이등가가동시간의예측값(Y) 및태양광발전시스템등가가동시간의예측값(Y)을산출하는단계; 상기등가가동시간(Y, Y, Y), 상기태양광발전어레이표면온도(T) 및상기태양광발전어레이직류전류(I)를기초로하여태양광발전시스템손실의실측값(Y, Y, Y, Y,Y)을산출하는단계; 상기태양등가가동시간(Y) 및상기태양광발전어레이표면온도(T) 및상기태양광발전어레이의직류전류의예측값(I)을기초로태양광발전시스템손실의예측값(Y, Y, Y, Y, Y)을산출하는단계; 상기태양광발전시스템손실의실측값(Y, Y, Y, Y,Y)과각각의상기태양광발전시스템손실의예측값(Y, Y, Y, Y, Y)의차이값(Y, Y, Y, Y, Y)을산출하는단계; 및상기태양등가가동시간(Y), 상기차이값(Y, Y, Y, Y, Y), 상기태양광발전시스템등가가동시간(Y) 및발생횟수(F)가미리설정된기준을만족하는지를비교하여태양광발전시스템의고장여부를판단한후에고장상태에대응하는고장모드를출력하는단계를포함한다. 따라서, 본발명은일사강도, 온도및 풍속등의주변환경의변화뿐만아니라옥외에서운전중인태양광발전시스템의정상혹은고장유무에대해진단할수 있어태양광발전시스템의고장에따른에너지손실을최소화할수 있고, 태양광발전시스템의수명이완료될때까지최대성능을장기간유지할수 있는성능과품질의보증이가능해질수 있다.