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MATLAB-Simulink를 이용한 Newton method의 MPPT 출력특성 분석
백승학(S.H. Baek),임지혜(J.H. Im),임양수(Y.S. Lim),박정민(J.M. Park),임홍우(H.W. Lim),최문한(M.H. Choi),조금배(G.B. Cho),백형래(H.L. Baek) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
Now a days has problem of energy resource shortage and environmental pollution. We are looking up various solution plans regarding this problem. Solar power is one of the solution to solve the energy shortage problem. But solar power is affected by the weather. So variation weather we can use Maximum Power Point Tracing device for solar PV system. In this paper, the new MPPT method using MATLAB - Simulink analysis of output characteristics. Using Newton Method in this paper, set up ever search step of the tracking process. Like this way analyze MPPT method.
전기분야 실적공사비 적산제도에서 이윤산정 분석 및 제안
서순석(S.S. Seo),임승학(S.H Lim),권용만(Y.M. Kwon),김광곤(K.G. Kim),김재현(J.H. Kim),손홍관(H.K. Sohn),박인표(I.P. Park) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
Since Jan. 2004, the Ministry of Construction and Transportation has partly introduced estimation system of historical cost data in order to reflect result cost of construction market to cost estimation for public construction. It is expected that the purpose of the introduction would be evaluated considering the long-term development of domestic construction industry. In article 3, paragraph 4 of the planning criteria of estimated cost of financial regulation related to government contract rule, the profit estimated by historical cost data indicates sales profit and it is calculated by multiplying the sum of direct cost, indirect cost and general overhead by rate of profit. Finally, it is said that rate of profit cannot exceeds 10%. However, there are a lot of constructions for electronic equipment in the electronic construction and the proportion of government furnished material is very high, not like engineering works or constructions. Therefore, as the proportion of material cost over direct cost is relatively lower, if current rate of profit (10%) is applied, there would be a wide difference of cost in the items of profit under the estimation system of historical cost data. This paper was conducted to examine estimation methods of the items of profit under the estimation system of historical cost data and suggest reasonable applications.