Mingotti Alessandro, Bartolomei Lorenzo, Peretto Lorenzo, Tinarelli Roberto
Department of Electrical, Electronic and Information Engineering, Guglielmo Marconi Alma Mater Studiorum, University of Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy.
Sensors (Basel). 2020 Oct 14;20(20):5810. doi: 10.3390/s20205810.
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.
当需要对电网进行适当的控制和管理时，互感器的精度评估始终是一项关键任务。特别是，当电网或仪表本身在不同于额定条件的情况下运行时，精度就成为一个关键因素。然而，在关注上述非额定条件之前，充分了解互感器在额定条件下的行为非常重要。为此，本研究长期分析了传统型、感应型和低功率电压互感器的精度行为。目的是找到可能有助于电压互感器建模或输出预测的模式和相关性。从结果中，指出并详细描述了低功率和感应电压互感器之间的主要差异。
