MEASUREMENT ACCURACY OF SHORT-CIRCUIT LOOP IMPEDANCE IN POWER SYSTEMS

Ryszard Roskosz, Michal Ziólko

Abstract

This paper presents the problems relating to the measurement of power system loop impedance in present day low voltage networks particularly in presence of voltage disturbances. The paper discusses the main sources of loop impedance measurement errors such as: the difference in impedances arguments, transients in tested circuit and the distortion of the voltage waveform in the measurement point. The conditions how to minimize measurement inaccuracy are also given. Example of loop impedance measurement errors are presented in the form of graves for different parameters of the tested circuit.

Keywords

loop impedance, low voltage network, measurement accuracy

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PWC-2003-TC4-105.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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