Performance evaluation of an energy meter for low-voltage system monitoring

IEEE Trans. Instrum. Meas.

Tinarelli

2020

This paper presents a study on Low-Power Passive Current Transformer. In particular, the performance analysis of 3 Rogowski coils have been assessed when multiple influence quantities where acting on them: conductor position, frequency, and ambient temperature. First of all, their single effects have been assessed, then all their possible combination have been tested. From the results it can be concluded that ratio error is mostly affected by the combination of uncentered positions and temperature applied to Rogowski coils. Conversely, phase error is substantially not influenced by any quantities. Therefore, the proposed set of tests could become a benchmark in the Rogowski coils testing.

Section: Rogowski Coilsmentioning

confidence: 99%

Effects of Multiple Influence Quantities on Rogowski-Coil-Type Current Transformers

IEEE Trans. Instrum. Meas.

Tinarelli

2020

“…Of course, an IT is not the only grid component that has to work in both normal and anomalous conditions. In fact, all electrical assets, such as energy meters [ 12 , 13 , 14 ], electric machines [ 15 , 16 ], and accessories [ 17 , 18 , 19 ], have to be properly designed to avoid (i) encountering any grid malfunctions or (ii) having corrupted and incorrect measurements sent and processed by typical algorithms dedicated to the control and management of the network [ 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

On the Long-Period Accuracy Behavior of Inductive and Low-Power Instrument Transformers

Bartolomei

et al. 2020

Sensors

The accuracy evaluation of instrument transformers is always a key task when proper control and management of the power network is required. In particular, accuracy becomes a critical aspect when the grid or the instrumentation itself is operating at conditions different from the rated ones. However, before focusing on the above non-rated conditions, it is important to fully understand the instrument transformer behavior at rated conditions. To this end, this work analyzed the accuracy behavior of legacy, inductive, and low-power voltage transformers over long periods of time. The aim was to find patterns and correlations that may be of help during the modelling or the output prediction of voltage transformers. From the results, the main differences between low-power and inductive voltage transformers were pointed out and described in detail.

“…To this purpose, this paper focuses on LPITs, in particular the passive current type: the Rogowski coil [15]. Both current and voltage LPITs are widely adopted in many Smart Grids application [16][17][18], as a matter of fact they are more versatile, light, compact, and suitable for all the new arising grid applications. Turning to the Rogowski coils, their use has increased over time due to their flexibility in the installation in uncommon places.…”

Section: Introductionmentioning

confidence: 99%

A Smart Frequency Domain-Based Modeling Procedure of Rogowski Coil for Power Systems Applications

IEEE Trans. Instrum. Meas.

Tinarelli

2020

Rogowski coils are a key measurement instruments in several applications due to their flexibility, large bandwidth, linearity, etc. Like the majority of the instrument transformers, also Rogowski coils are standardized and their use is regulated almost for every application. This work focuses on a smart way for the equivalent parameters' computation of the Rogowski coil. The parameter computation is performed evaluating the Rogowski response when subjected to a single waveform generated to fulfil a specific requirement on its frequency content. Results demonstrates the equivalency of the presented method compared to the typical frequency sweep test. In addition, the results have been used to validate a Rogowski's output estimate procedure presented by the authors in a previous work.