• Title/Summary/Keyword: small wind power

Search Result 328, Processing Time 0.041 seconds

The Prediction of the location and electric Power for Small Wind Powers in the H University Campus (대학교 캠퍼스 소형풍력발전기 설치 및 발전량 예측에 관한 연구)

  • Cho, Kwan Haeng;Yoon, JaeOck
    • KIEAE Journal
    • /
    • v.12 no.1
    • /
    • pp.127-132
    • /
    • 2012
  • The energy consumption in the world is growing rapidly. And the environmental issues of climate become a important task. The interest in renewable energy like wind and solar is increasing now. Especially, by reducing power transmission loss, a small wind power is getting attention at the residential areas and campus of university. In this study, we attempted to estimate and compare the wind energy density using wind data of AWS (Automatic Weather Station) of H University. In this case of a campus, the weibull distribution parameter C is 2.27, and K is 0.88. According to the data, the energy density of the small wind power is 12.7 W/m2. We did CFD(Computational Fluid Dynamics) simulations at H University campus by 7 wind directions(ENE, ESE, SE, NW, WNW, W, WSW). In the results, we suggest 4 small wind powers. The small wind power generating system can produce 4,514kWh annually.

Power Control of Small Wind Power System (소형 풍력발전시스템의 출력제어)

  • Kim, Chul-Ho;Lee, Hyun-Chae;Seo, Young-Taek;Cho, Hwan-Kee
    • Proceedings of the KIEE Conference
    • /
    • 2009.07a
    • /
    • pp.1066_1067
    • /
    • 2009
  • Wind power is one of most promising renewable energy. The output capacity of large wind turbine has been increased for off-shore application. Number of installation of small wind turbine also has been increased for the stand-alone and off-grid application of remote area and recently small wind turbine equipped with lamp on the pole is used for street lamp. Maximum wind energy must be extracted by wind turbine within rated wind speed. Power must be controlled to protect the system such as blade, generator, and power system above the rated wind speed. In this paper, small wind power system of 800W rating for battery charging is implemented and output power control by furling system is verified at wind tunnel test.

  • PDF

A study of overspeed-protection furling mechanism of Small Wind Turbine (소형 풍력의 과풍속 보호 장치에 관한 연구)

  • Kim, Hyoung-Gil;Kim, Chul-Ho;Seo, Young-Taek;Oh, Chul-Soo
    • Proceedings of the KIEE Conference
    • /
    • 2007.07a
    • /
    • pp.959-960
    • /
    • 2007
  • The wind power has been used steadily since long ago, but the importance of it has been faded because of the abundant and convenient fossil energy. Now, due to the energy crisis, experiencing the environmental problems etc, the necessity of using it growing bigger. Because the small wind turbines under a few kW grade has the merits of setting up with low costs by individuals, and get the energy saving effects that, it has the secured, separate markets from the range systems, and the developing of it is continuously proceeding. The small wind turbine system must have the output power regulating system for the over wind speed, to run steadily in the various wind speed environment. In case of the small wind turbine system, to prevent the breaking and for safety, at the over wind speed, additional system is required, and in most cases, output power is restricted by mechanical means. In this paper, the furling system makes the tail and the head move to make the blades to the wind in slanted angle, restrict the output power at the over wind speed. In thesis, small prototype wind turbine is made, and analyzing the output power characteristics at the over wind speed, and to verify, through the logical study and tests.

  • PDF

Configuration and Operation characteristics of a Small stand-alone Wind Power Generation System (독립형 소형 풍력발전시스템 구성 및 운전특성)

  • Hwang, In-Ho
    • Proceedings of the KIPE Conference
    • /
    • 2002.11a
    • /
    • pp.65-68
    • /
    • 2002
  • Most of the present demand in the world is met by fossil and nuclear power plants. A small part is met by renewable energy technologies. Among the renewable power sources, wind and solar energy have experienced a remarkably rapid growth in the past 10 years. Recently the utilization of wind power has been receiving close attention in this country, especially for the electrification of off-shore islands. The objective of this study is to demonstrate a small wind energy system as a stand-alone power source.

  • PDF

Measured AEP Evaluations of a Small Wind Turbine using Measured Power Curve & Wind Data (측정 출력곡선과 기상자료를 이용한 소형 풍력발전기 연간 발전량 비교평가)

  • Kim, Seokwoo
    • Journal of the Korean Solar Energy Society
    • /
    • v.33 no.6
    • /
    • pp.32-38
    • /
    • 2013
  • In an efforts to encourage renewable energy deployment, the government has initiated so called 1 million green homes program but the accumulated installation capacity of small wind turbine has been about 70kW. It can be explained in several ways such that current subsidy program does not meet public expectations, economic feasibility of wind energy is in doubt or acoustic emission is significant etc. The author investigated annual energy production of Skystream 3.7 wind turbine using measured power curve and wind resource data. The measured power curve of the small wind turbine was obtained through power performance tests at Wol-Ryoung test site. AEP(Annual Energy Production) and CF(Capacity Factor) were evaluated at selected locations with the measured power curve.

Turbulence Intensity Effects on Small Wind Turbine Power Performance (난류강도가 소형 풍력발전기 출력에 미치는 영향)

  • Kim, Seokwoo
    • Journal of the Korean Solar Energy Society
    • /
    • v.33 no.6
    • /
    • pp.19-25
    • /
    • 2013
  • Energy generation from an instrumented Skystream 3.7 small wind turbine was used to investigate the effect of ambient turbulence levels on wind turbine power output performance. It is widely known that elevated ambient turbulence level results in decreased energy production, especially for large sized wind turbine. However, over the entire wind speed range from cut in to the rated wind speed, the measured energy generation increased as ambient turbulence levels elevated. The impact degree of turbulence levels on power generation was reduced as measured wind speed approached to the rated wind speed of 13m/s.

A Probabilistic Approach to Small Signal Stability Analysis of Power Systems with Correlated Wind Sources

  • Yue, Hao;Li, Gengyin;Zhou, Ming
    • Journal of Electrical Engineering and Technology
    • /
    • v.8 no.6
    • /
    • pp.1605-1614
    • /
    • 2013
  • This paper presents a probabilistic methodology for small signal stability analysis of power system with correlated wind sources. The approach considers not only the stochastic characteristics of wind speeds which are treated as random variables with Weibull distributions, while also the wind speed spatial correlations which are characterized by a correlation matrix. The approach based on the 2m+1 point estimate method and Cornish Fisher expansion, the orthogonal transformation technique is used to deal with the correlation of wind farms. A case study is carried out on IEEE New England system and the probabilistic indexes for eigenvalue analysis are computed from the statistical processing of the obtained results. The accuracy and efficiency of the proposed method are confirmed by comparing with the results of Monte Carlo simulation. The numerical results indicate that the proposed method can actually capture the probabilistic characteristics of mode properties of the power systems with correlated wind sources and the consideration of spatial correlation has influence on the probability of system small signal stability.

A Study on Generator Temperature and Power Converter Efficiency according to change of Wind Velocity (풍속 변화에 따른 발전기 온도 및 전력변환장치 효율에 관한 연구)

  • Song, Young-Sang;Han, Woon-Ki;Jung, Jin-Soo;Lim, Hyun-Sung;Cho, Sung-Koo;Jeon, Taehyun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.29 no.7
    • /
    • pp.8-13
    • /
    • 2015
  • Recently, because a renewable power source must operate as a constant rate in accordance with RPS(Renewable Portfolio Standard), the study of the renewable power sources has been ongoing. Especially because of noise of wind turbine, troubleshooting, and urban greening business, research related with small wind turbine are underway. The economics and reliability are important parts for the activation of small wind turbine, such as solar energy. In this paper, by analyzing the temperature variations for each location and efficiency of power conversion devices in accordance with short period wind speed changes in simulation test, we reviewed the safety about temperature variations of wind generator and the method of selection of power converter.

Generation Efficiency Characteristics of Small Wind Power for Green Energy Utilization (그린에너지 활용을 위한 소형풍력발전기의 효율 특성)

  • Lee, You-Seok;Kim, Jae-Yong
    • Applied Chemistry for Engineering
    • /
    • v.26 no.4
    • /
    • pp.489-494
    • /
    • 2015
  • As the world-wide supply of fossil fuel sources decreases, the need for efficient energy conservation in addition to developing green energy technologies becomes critical. Wind energy is now regarded as one of the most rapidly expanding energy sources in the world. However, due to the high cost for the foundation of large turbines and the high wind speed (over 12 m/s) required, it is very difficult to establish inland wind power plants. In order to solve issues mentioned above, experiments were performed using the small wind power system operated in a low wind speed. In this research, inland wind condition was first analyzed, and 300 W and 1 kW small wind power generators were then installed on a roof and efficiencies of generating electricities were compared.

Aero-elastic coupled numerical analysis of small wind turbine-generator modelling

  • Bukala, Jakub;Damaziak, Krzysztof;Karimi, Hamid Reza;Malachowski, Jerzy
    • Wind and Structures
    • /
    • v.23 no.6
    • /
    • pp.577-594
    • /
    • 2016
  • In this paper a practical modelling methodology is presented for a series of aero- servo- elastic- coupled numerical analyses of small wind turbine operation, with particular emphasis on variable speed generator modelling in various wind speed conditions. The following characteristics are determined using the available computer tools: the tip speed ratio as a function of the generator constant (under the assumption of constant wind speed), the turbine coefficient of power as a function of the tip speed ratio (the torque curve is modified accordingly and generator speed and power curves are plotted), turbine power curves and coefficient of power curve as functions of the incoming wind speed. The last stage is to determine forces and torques acting on rotor blades and turbine tower for specific incoming wind speeds in order to examine the impact of the stall phenomena on these values (beyond the rated power of the turbine). It is shown that the obtained results demonstrate a valuable guideline for small wind turbines design process.