Open AccessImpact assessment of clearance in corona testing for a high‐voltage substation connector set using FEM
Author(s) -
De La Hoz Manuel,
Etxegarai Agurtzane,
Larrea Ane Miren,
Mazon Angel Javier,
Zorrozua Miguel Angel
Publication year - 2020
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2019.1798
Subject(s) - cable gland , voltage , finite element method , enclosure , engineering , set (abstract data type) , reliability engineering , high voltage , computer science , electronic engineering , structural engineering , electrical engineering , programming language
The relevance of clearance in the inception voltage at which a positive corona effect occurs on a substation connector set rated at 500kV rms is studied. The methodology for the inception voltage prediction is based on Pedersen's criterion and uses the finite element method (FEM). The calculation and simulation procedure is then applied to the connector set under study in a reference test set‐up under the conditions established by NEMA CC1 and IEC 61284 standards. To analyse the impact of the proximity of substation connectors to the laboratory walls and between them, the enclosure size and the connector's separation have been modified for the present study. As a result, it can be concluded that clearance can create differences in inception voltage up to 15%. Therefore, the relevance of clearance in inception voltage depends not only on the connectors' geometry but also on their location within the set‐up and the proximity of other elements. Additional contributions are also presented in the present study regarding the definition of the critical line and improvements in the calculation for run‐time and error minimisation time. Thus, the implementation of the proposed methodology for industrial applications is streamlined.