Abstract
Based on the steepest descent theory(Edmonson W, Srinivasan K, Wang C and Principe J1997 IEEE Trans. Circuits Syst. 45 379-84, Neil E andMian O N 1992 IEEE Trans. Neural Netw. 3 308-14) andthe original response curve of a current probe used for powersystem electromagnetic compatibility measurement, an accurateanalogue model has been built for the probe, with a maximumerror of 5.2%. Before application the analogue model needs tobe discretized in the z domain, however the digital model gives asteeper frequency response than the analogue one. To compensatefor this effect, another digital band-pass filter was attachedto the above model, and its parameters were obtained by computersimulation. The compensated digital model presented a maximumerror of 5.8% compared with the probe's response curve. Thedigital modelling and compensating strategy can feasibly expandthe frequency band over which the probe is useful formeasurement applications.
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