JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2013, Vol. 43 ›› Issue (5): 39-43.

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An output power optimization method based on impedance matching for a small wind generation system

JING Ye-fei1, ZHANG Cheng-hui1*, XU Bei-bei, LI Ke1, CHU Xiao-guang1   

  1. 1.School of Control Science and Engineering, Shandong University, Jinan 250061, China;
    2. Shenzhen Entry-exit Insection and Quarantine Bureau, Shenzhen 518067, China
  • Received:2013-08-10 Online:2013-10-20 Published:2013-08-10

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Abstract:

In order to solve the problem that the wind energy utilization was very low in most of small wind power generation systems, a novel method based on impedance matching for optimizing output power was proposed. The mathematic model of small wind power generation system was built and analyzed, and it was pointed out that the stable operation point of the wind power generation system would be changed by adding series impedance between the generator and rectifier. The output power would be increased if the parameter of impedance is set reasonably. Base on this principle, the parameter of impedance was confirmed by using the particle swarm optimization algorithm. And the output in a period of time considering the probability distribution of wind speed and battery voltage was used as an optimization object functions. The simulation results showed that the output power of wind generator was effectively improved if the parameter of impedance was correctly selected, and the average output power was increased by 21％.

Key words: small wind power generation, particle swarm optimization, impedance matching, Weibull distribution, average output power

CLC Number: 

  • TM614
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