MÔ PHỎNG SỰ PHÂN BỐ NHIỆT VÀ ĐIỆN TRƯỜNG TRONG KHỚP NỐI CÁP HVDC SỬ DỤNG MÔ HÌNH VĨ MÔ

  • Vũ Thị Thu Nga
  • Trần Thanh Sơn
  • Trần Anh Tùng
Keywords: HVDC cable, cable joints, field distribution, temperature distribution.

Abstract

Energy transport through High Voltage Direct Current links are currently being developed for the
connection to distributed electrical energy sources for synchronization purpose among various HVAC
networks. Oil-impregnated paper insulated cables represent reliable solutions and tend to be
replaced by synthetic insulation based on polyethylene materials. One of the key issues with these
synthetic materials is the need to prevent space charge accumulation, which represents an early
failure mechanism for cables. Specifically, accessories like cable joints and terminations represent
weak points in the cable, particularly as regards the hazardous field distribution resulting from the
association of insulations of different nature. The aim of this research is to provide modelling
approaches of transient and steady state phenomena occurring in HVDC cable systems, with
consideration of non-equilibrium thermal conditions on the cables. The project is based on
experimental data on insulating materials constituting the modelled accessories and system design
taken from a real case study. It will enable to predict temperature distribution and associated field
distortion as a function of stressing condition and thermal environment.

điểm /   đánh giá
Published
2019-07-25
Section
Bài viết