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Applied energy v.212, 2018년, pp.196 - 209   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Optimal operation of fuel cell/wind turbine hybrid power system under turbulent wind and variable load

Bizon, Nicu (Address: University of Pitesti, Faculty of Electronics, Communications and Computers Science, 1 Targu din Vale, Arges, 110040 Pitesti, Romania. ) ;
  • 초록  

    Abstract In this paper is proposed a new Extremum Seeking Control (ESC) algorithm for optimal operation of Wind Turbine (WT) under turbulent wind. In this proposal the dithers’ amplitude is WT system dependent, not constant or decreasing exponentially as in the classic ESC schemes. So, instead of one, the proposed ESC scheme has two loops: (1) the classic ESC loop controlled by the loop gain (k 1 ) to accurately find the Maximum Power Point (MPP); (2) the anticipative ESC loop controlled by the dither gain (k 2 ) to speed-up the localization of the current MPP under turbulent wind. The obtained results for a 100 Hz dither highlight the performance of the ESC-based MPP tracking algorithm proposed: about 99.9% tracking accuracy and a searching time less than 120 ms. This performance assures a tracking efficiency higher than 99% even for gusts of wind that may occur. The Fuel Cell is proposed as backup energy source for WT Hybrid Power System to sustain the load demand and reduce the size of the Energy Storage System (ESS), even for a high variability of the WT power. In comparison with Static Feed-Forward (sFF) strategy, a fuel economy of 5 lpm can be obtained using the ESC-based Real-Time Optimization (RTO) strategies proposed here, which means about 10% from the nominal fuel consumption. Highlights The Extremum Seeking Control (ESC) algorithm is efficient optimization tool. 99.9% accuracy and 0.12 s searching time for Wind Energy Conversion (WEC). Global ES (GES) Real Time Optimization (RTO) strategy is tested for 6 kW FC/WEC HPS. Up to 10% fuel economy for GES-RTO strategy as against Static Feed-Forward strategy. The fuel economy is less dependent on wind turbulence.


  • 주제어

    Extremum Seeking Control (ESC) .   Wind Turbine (WT) .   Maximum Power Point (MPP) .   Fuel Cell (FC) .   Fuel economy .   Real-Time Optimization (RTO).  

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