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Nowadays, the presence of nonlinear devices cannot be neglected either for their growing numbers or for their effect on the distribution network. In particular, these devices will produce relevant harmonics, which can cause problems such as increase of losses, over-heating in the power transformer malfunction of the circuit switch and, generally, an untimely aging process of connected devices. As...
Nowadays, voltage transducers in medium-voltage (MV) distribution networks operate in nonsinusoidal conditions while their calibration is still based on simple sine-wave tests. A more significant characterization could be achieved using complex multitone signals. However, this requires an MV generator able to apply arbitrary voltage waveforms to the transducer under test. The authors have recently...
The development of an arbitrary MV generator (AMVG) is a quite complex task. The level of voltage amplitude requires a careful analysis of any possible solutions at the level of its design, by finding the best tradeoff between performance and cost. In this perspective, a very attractive solution is represented by the way followed by the authors, in which the cost of the AMVG has been kept low thanks...
Medium voltage transducers are calibrated by applying sinusoidal signals at their primary side and comparing the secondary output with that of a reference transducer. It is clear that this is a particular working condition that is often quite different from the actual one. In fact, voltage distortion in nowadays distribution networks can be not negligible. The measurement of these harmonic components...
The increasing interest in the use in medium and high voltage networks as well as in the low voltage ones of non-conventional low power instrument measurement transformers entails the availability of dedicated calibration set-up, equipped with flexible and accurate measurement systems. The paper presents a measurement system for the calibration of both inductive and low power voltage and current transformers,...
The importance of power quality monitoring in medium voltage (MV) systems has dramatically increased in the last years. It is well known that a measurement system with wide bandwidth and very low distortion is mandatory for this purpose. Usually, the performance bottlenecks are the transducers which have to be carefully selected according to the required accuracy. Therefore, it is very important to...
As well known, the availability of an advanced and reliable model describing the real behavior of a physical device may strongly simplify the measurement activities devoted to its characterization. A model driven approach can meaningfully reduce the amount and the complexity of the required tests. This is very important when in field experimental activities are required. A typical example of this...
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