OTA-C based high-speed analog processing for real-time fault location in electrical power networks

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• 作者：François Gaugaz ; François Krummenacher…
• 关键词：Analog emulation ; Transmission lines ; Power network fault location ; Electromagnetic time ; reversal
• 刊名：Analog Integrated Circuits and Signal Processing
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：89
• 期：1
• 页码：61-67
• 全文大小：1,192 KB
• 刊物类别：Engineering
• 刊物主题：Circuits and Systems
  Electronic and Computer Engineering
  Signal,Image and Speech Processing
  
• 出版者：Springer Netherlands
• ISSN：1573-1979
• 卷排序：89

文摘

This paper explores the potential and limitations of analog integrated circuit techniques for the simulation of low-loss or lossless 1D or 2D transmission mediums. In this approach, a transmission line is mapped into a ladder consisting of N identical LC elements, each modeling a finite length increment of the line. Inductors are then emulated by a gyrator-capacitor combination, yielding a classical transconductor-capacitor (gm-C) circuit, suitable for integration. The validity of this approximation is discussed in the context of fault location in power networks, an application based on the electromagnetic time-reversal method. Design constraints on gm-C circuits are derived and non-ideal effects such as finite open-loop gain and component mismatches are evaluated. It is shown that a simple analog implementation can locate the fault within 1 % accuracy with a significant speed advantage over classical computational methods, reducing the processing time to <100 ms.