Transactions of China Electrotechnical Society  2015, Vol. 30 Issue (24): 76-83    DOI:
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Segmented Binary Tree Method for Power Electronic System Impedance Measurement
Yue Xiaolong, Zhuo Fang, Zhang Zhenghua, Shi Hongtao, Zhang Dong
Xi’an Jiaotong University Xi’an 710049 China

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Abstract  Impedance measurement is very important in power electronic based systems because of the close relationship between impedance and stability. However, traditional frequency sweep method always selects the equal frequency interval without guiding theory, which results in low accuracy, low reliability and low efficiency. In this paper, the relationship between measured result and the frequency interval is built firstly, then a segmented binary tree method for power electronic system impedance measurement is proposed. With this method, injection frequency points can be selected automatically according to the requirement of measurement accuracy. Compared to the traditional frequency sweep method, the proposed one can measure impedance more accurately and efficiently. The experimental results validate the effectiveness of the proposed method.
Key wordsPower electronics based systems      impedance measurement      frequency sweep      binary tree      error calibration     
Received: 31 December 2013      Published: 30 December 2015
PACS: TM46  
  TM934  
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Yue Xiaolong
Zhuo Fang
Zhang Zhenghua
Shi Hongtao
Zhang Dong
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Yue Xiaolong,Zhuo Fang,Zhang Zhenghua等. Segmented Binary Tree Method for Power Electronic System Impedance Measurement[J]. Transactions of China Electrotechnical Society, 2015, 30(24): 76-83.
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