OTA-C based high-speed analog processing for real-time fault location in electrical power networks
- 178 Downloads
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.
KeywordsAnalog emulation Transmission lines Power network fault location Electromagnetic time-reversal
This research has been funded by the Swiss National Science Foundation (SNSF), within the Project N: 146414.
- 3.Nagel, I., Fabre, L., Cherkaoui, R., & Kayal, M. (2010). Microelectronic, high-speed data processing calculators for power system analysis: Comparison. In NEWCAS (pp. 137–140).Google Scholar
- 4.Nagel, I., Fabre, L., Pastre, M., Krummenacher, F., Cherkaoui, R., & Kayal, M. (2013). High-speed power system transient stability simulation using highly dedicated hardware. IEEE Transactions on Power Systems, 28(4), 1–10.Google Scholar
- 5.Lee, T. H. (2004). The design of CMOS radio-frequency integrated circuits (2nd ed.). Cambridge: Cambridge University Press.Google Scholar
- 6.Huelsman, L. P. (1968). Theory and design of active RC circuits. New York: McGraw-Hill.Google Scholar
- 8.Manesh, H. M., Lugrin, G., Razzaghi, R., Romero, C., Paolone, M., & Rachidi, F. (2012). A new method to locate faults in power networks based on electromagnetic time reversal. In IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) (pp. 469–474).Google Scholar