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Report RSE 18000010

Feasibility study for the development of an innovative polymeric sensor for the detection of the electric field in DC



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A. Barbareschi Villa (RSE SpA), L. Barbieri (RSE SpA), T. Santaniello (Università degli studi di Milano), R. Malgesini (RSE SpA) , P. Milani (Università degli studi di Milano)

T&D-C.C. 2017 - Transmission and Distribution in Continuous Current

Study for the development of a sensor to measure the DC electric field and primary test verification

DC current is gaining more and more importance due to the spread of renewable resources that make the transportation of a huge amount of energy a necessity. The current study focuses on the development of a sensor to measure the DC electric field near the active parts or the grounded electric field. The desired properties are an operating frequency that ranges from 0 to 100 Hz and an electric field measurement range of 80 kV/m ÷ 200 kV/m. The sensor is a fully dielectric ionic cross-linked copolymer poly(AA-co-AN) with an electro-active response, developed in the C.I.Ma.I.Na. (Centro Interdisciplinare Materiali e Interfacce Nanostrutturati University of Milan) laboratories.

The polymer is robust, flexible and has very interesting charge transport properties. When it undergoes an electric field it shows a displacement easily to be detected by eyes, stable monotonous while increasing the field and reproducible. The research is conducted first analyzing a material with a standard formulation and then some modifications both on the material formulation and its geometrical characteristics have been made to optimize the performance. In particular the addition of nanoclusters of clay is shown to be beneficial for the actuation mechanism and the material stiffness.

The polymer shows a bending deformation toward the cathode with a displacement in the range of few hundreds microns up to 3 mm when an electric field lower than 1 kVcc (125 V/cm) is applied.

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