Calibration Procedure to Test the Effects of Multiple Influence Quantities on Low-Power Voltage Transformers

Sensors

Alessandro Mingotti¹  Lorenzo Peretto¹  Roberto Tinarelli¹ 

[1] Department of Electrical, Electronic and Information Engineering—Guglielmo Marconi, Alma Mater Studiorum—University of Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy;

关键词: accuracy;    voltage transformer;    influence quantities;    calibration procedure;    temperature;    electric field;    frequency;    ratio error;    phase displacement;   

DOI  :  10.3390/s20041172

来源: DOAJ

【 摘 要 】

The article presents a study on low-power voltage transformers (LPVTs). Considering their increasing spread among Smart Grids, it is fundamental to assess their accuracy behavior in as realistic conditions as possible. Therefore, this article presents a detailed calibration procedure to test LPVTs’ accuracy when various external influence quantities are simultaneously acting on them. In the calibration procedure, the considered quantities are frequency, air temperature, and external electric field. Afterwards, the designed procedure is applied on three different off-the-shelf LPVTs using a measurement setup developed in a laboratory environment. The presented results (i) confirm the easy applicability of the designed calibration procedure; (ii) highlight the various effects of the influence quantities on the accuracy of different types of LPVTs; (iii) confirm the need to include more realistic tests, like the type-tests presented, into the standards to appreciate a wider set of possible in-field behaviors.

【 授权许可】

Unknown