• Title/Summary/Keyword: Wind Power System

Search Result 1,635, Processing Time 0.039 seconds

Study of Optimal Design Parameter for Gearbox on Wind Power System (풍력발전시스템용 증속기의 최적화 설계요소에 관한 연구)

  • 이근호;성백주;최용혁
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2003.06a
    • /
    • pp.737-741
    • /
    • 2003
  • The wind power system is spotlighted as one of the no-pollution power generation systems. The system uses winds as power source that are rotated the blade and the rotating power from blade generate the electricity power. Gearbox needs to transfer the wind powers that have the high-torque-low-speed characteristics to generator that have the low-torque-high-speed characteristics. Because the wind power system generally locates the remote place like seaside or mountainside and the gearbox installs on the limited and high placed space, the gearbox of the wind power system is required the optimal space design and high reliability. In this paper, the structure of the gearbox is proposed to achieve the optimal space and efficiency by compounding the planetary gear train that has the high power density and parallel type gear train that has the long service life. The design parameters that are affected the service life are studied. The gear ratio and face width are investigated as an affected parameter for design sensitivity of service life.

  • PDF

The Development of the Monitoring System for Power performance using the Lab View (LabView를 이용한 풍력발전 성능평가용 모니터링 시스템 개발)

  • Ko, Seok-Whan;Jang, Moon-Seok;Ju, Young-Chul;Lee, Yoon-Sub
    • Journal of the Korean Solar Energy Society
    • /
    • v.29 no.6
    • /
    • pp.69-74
    • /
    • 2009
  • Monitoring system is an absolutely-required system for assessing a performance and fatigue load of the wind turbine in an on-shore wind energy experimental research complex. It was implemented for the purpose of monitoring the wind information measured from a meteorological tower at the monitoring house, and of utilizing the measured data(fatigue data and electric analyzing data of wind turbine)for the performance assessment, by using the LabVIEW program. Then, by adding the performance assessment-related data acquired from the wind turbine during the performance assessment and the data recorder for synchronizing the data of meteorological tower, the system(BusDAQ) was implemented. Because it transmitted the data by converting the output 'RS-232' of data logger which measures the wind condition into CAN protocol, the data error rate was minimized. Also, This paper is introduced to make the best use of the developed monitoring system and to explain about construct of the system and detailed data communication of its system.

A Study on Optimal Flywheel Capacity Estimation for Ulleung-do Power System (울릉도 계통에 대한 플라이휠 최적 용량 산정에 관한 연구)

  • Choi, Seong-Won;Lee, Han-Sang;Lee, Jung-Pil;Han, Sang-Chul;Sung, Tae-Hyun;Han, Young-Heui;Jang, Gil-Soo
    • Proceedings of the KIEE Conference
    • /
    • 2007.07a
    • /
    • pp.606-607
    • /
    • 2007
  • This paper is about optimal flywheel capacity estimation for Ullueng-do power system. The power system of Ullueng-do has some differences with other island power system in Korea. It includes wind generator, hydro-generators as well as diesel generators. There are some problems on 600kW wind generator. Because of frequent drop of wind generator, the Ulleung-do power system have been threatened on frequency. The power frequency is 60Hz, and it should be between 59.9 and 60.1Hz. However, since the electrical inertia is small and the weight of wind generation is relatively high, generator drop of wind generation might make the power frequency out of boundary. In this paper, the flywheel energy storage system is assumed to be installed on Ulleung-do power system. Then, the maximum wind generation capacity and the optimal superconducting flywheel energy storage system capacity is estimated by the transient stability simulations.

  • PDF

Capacity Credit and Reasonable ESS Evaluation of Power System Including WTG combined with Battery Energy Storage System (에너지저장장치와 결합한 WTG를 포함하는 전력계통의 Capacity Credit 평가 및 ESS 적정규모 평가방안)

  • Oh, Ungjin;Lee, Yeonchan;Choi, Jaeseok;Lim, Jintaek
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.65 no.6
    • /
    • pp.923-933
    • /
    • 2016
  • This paper proposes a new method for evaluating Effective Load Carrying Capability(ELCC) and capacity credit(C.C.) of power system including Wind Turbine Generator(WTG) combined with Battery Energy Storage System(BESS). WTG can only generate electricity power when the fuel(wind) is available. Because of fluctuation of wind speed, WTG generates intermittent power. In view point of reliability of power system, intermittent power of WTG is similar with probabilistic characteristics based on power on-off due to mechanical availability of conventional generator. Therefore, high penetration of WTG will occur difficulties in power operation. The high penetration of numerous and large capacity WTG can make risk to power system adequacy, quality and stability. Therefore, the penetration of WTG is limited in the world. In recent, it is expected that BESS installed at wind farms may smooth the wind power fluctuation. This study develops a new method to assess how much is penetration of WTG able to extended when Wind Turbine Generator(WTG) is combined with Battery Energy Storage System(BESS). In this paper, the assessment equation of capacity credit of WTG combined with BESS is formulated newly. The simulation program, is called GNRL_ESS, is developed in this study. This paper demonstrates a various case studies of ELCC and capacity credit(C.C.) of power system containing WTG combined with BESS using model system as similar as Jeju island power system. The case studies demonstrate that not only reasonable BESS capacity for a WTG but also permissible penetration percent of WTG combined with BESS and reasonable WTG capacity for a BESS can be decided.

Analysis of losses within SMES system for compensating output fluctuation of wind power farm

  • Park, S.I.;Kim, J.H.;Le, T.D.;Lee, D.H.;Kim, D.J.;Yoon, Y.S.;Yoon, K.Y.;Kim, H.M.
    • Progress in Superconductivity and Cryogenics
    • /
    • v.16 no.4
    • /
    • pp.57-61
    • /
    • 2014
  • Output fluctuation which is generated in wind power farm can hinder stability of total power system. The electric energy storage (EES) reduces unstable output, and superconducting magnetic energy storage (SMES) of various EESs has the proper performance for output compensation of wind power farm since it charges and discharges large scale power quickly with high efficiency. However, because of the change of current within SMES, the electromagnetic losses occur in the process of output compensation. In this paper, the thermal effect of the losses that occur in SMES system while compensating in wind power farm is analyzed. The output analysis of wind power farm is processed by numerical analysis, and the losses of SMES system is analyzed by 3D finite element analysis (FEA) simulation tool.

Wind Analysis and Site Assessment for Test Site of 3MW Wind Power System (3MW 풍력발전시스템 개발품의 육상풍력실증단지 조성 타당성 평가를 위한 풍황 및 지형평가 연구)

  • Woo, Sangwoo;Lee, Ki-Hak;Lee, Sang-Il;Park, Jong-Po
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 2011.11a
    • /
    • pp.35.2-35.2
    • /
    • 2011
  • A wind turbine power performance test is very important to wind turbine manufacturers because a wind farm developer or planner must want to define power performance characteristics and reliability of new wind turbines. Based on the IEC 61400-12-1, A wind turbine test site has to be nicely installed at flat terrain for testing. We are developing the wind power system which is IEC wind class IIa model with rated power of 3MW. KEPCO's Gochang power testing center was considered as candidates to build the test site without site calibration. This paper aims to verify the validity of the test site by using implement site assessment result that was based on IEC 61400-12-1.

  • PDF

Steady-State Performance Analysis of an Integrated Wind Turbine Generating System in a DC Transmission System with Power Compensation System

  • Yamashita, Ken-Ichiro;Nishikata, Shoji
    • Journal of international Conference on Electrical Machines and Systems
    • /
    • v.1 no.1
    • /
    • pp.121-127
    • /
    • 2012
  • An electric power compensation system for a DC transmission system with an integrated wind turbine generator is proposed. The proposed compensation system consists of a synchronous generator and a duplex reactor. This apparatus is connected to the sending-end circuit of the DC transmission system. A set of steady-state equations of the system is first derived. Then, the effect of the duplex reactor, which can eliminate the sending-end grid current distortion due to commutation of the converter, is explored. The relationships among power at the sending-end circuit are also revealed. It is shown that fluctuations in the sending-end grid power due to changes in wind velocities are compensated with the proposed system. Finally, the effects of the sending-end grid conditions on the steady-state characteristics of the system are studied.

A Study on the Application of Small Wind Power System in Apartment Housing (공동주택에서의 소형풍력발전시스템 적용에 관한 연구)

  • Park, Jin-Chul;Kyung, Nam-Ho
    • Journal of the Korean Solar Energy Society
    • /
    • v.23 no.2
    • /
    • pp.21-34
    • /
    • 2003
  • This study aims to present the applicability of wind turbine generator system to urban buildings for the utilization of clean renewable energy. The results are as follows; According to the wind resource analysis, it has been found that small sized wind power system can be viable for buildings application due to the amplification of wind velocity around buildings or building clusters, in spite of low mean velocity of 2-3m/s in Seoul and Kyunggi urban areas. But planners must perform micrositing analysis around building so that wind turbine can be located at high velocity zones. The system must be designed to avoid obstacles preventing prevailing wind in buildings. It should be recognized that wind speeds are changing depending on the height and length from buildings. The wind power system can be used as a symbol of landmark which shows a sustainable architecture from the scenary Itself A case study for apartment building in urban showed that wind power systems can be applicable in two kinds of place, rooftops and ground levels. Especially, the wind power systems must be carefully positioned so that wind resources do not decrease when it is installed at ground levels. and according to life cycle cost analysis, adaption of new small win4 power systems to buildings were proved to produce a profit if it is considered the expense of environment improvement and the wind speed increasing according to rise of building height. This research will ultimately achieve green architecture that preserves nature and at the same time provides pleasant environment to humans, and will play a great role in establishing the environment-preserving sustainable architecture of the 21th century.

A study on the power factor improvement of Wind Turbine Generation System at Haeng-Won in Jeju (제주 행원 풍력 발전 시스템의 역률 개선에 관한 연구)

  • Park S.G.;Kim J.W.;Kang G.B.;Kim E.H.
    • Proceedings of the KIPE Conference
    • /
    • 2003.07a
    • /
    • pp.375-378
    • /
    • 2003
  • This paper presents a study on the power factor improvement of the Wind turbine Generation System(WTGS) at Haeng-won wind farm in Jeju Island. Vestas WTGS named V47 as a model system is selected in this paper, and has 660 kW Power ratings. In this system, power factor correction is controlled by the conventional method with power condenor bank. So, model system at Haeng-won wind farm has very low power factor in the area of low wind speed, which is from 4 m/s to 6 m/s. This is caused by the power factor correction using power condenser bank To improve the power factor in the area of low wind speed, we used the static var compensator(SVC) using current controlled PWM power converter by IGBT switching device. finally, to verify the profosed method, the results of computer simulation using Psim program are presented to support the discussion.

  • PDF

Effects of Wind Generation Uncertainty and Volatility on Power System Small Signal Stability

  • Shi, Li-Bao;Kang, Li;Yao, Liang-Zhong;Qin, Shi-Yao;Wang, Rui-Ming;Zhang, Jin-Ping
    • Journal of Electrical Engineering and Technology
    • /
    • v.9 no.1
    • /
    • pp.60-70
    • /
    • 2014
  • This paper discusses the impacts of large scale grid-connected wind farm equipped with permanent magnet synchronous generator (PMSG) on power system small signal stability (SSS) incorporating wind generation uncertainty and volatility. Firstly, a practical simplified PMSG model with rotor-flux-oriented control strategy applied is derived. In modeling PMSG generator side converter, the generator-voltage-oriented control strategy is utilized to implement the decoupled control of active and reactive power output. In modeling PMSG grid side converter, the grid-voltage-oriented control strategy is applied to realize the control of DC link voltage and the reactive power regulation. Based on the Weibull distribution of wind speed, the Monte Carlo simulation technique based is carried out on the IEEE 16-generator-68-bus test system as benchmark to study the impacts of wind generation uncertainty and volatility on small signal stability. Finally, some preliminary conclusions and comments are given.