PROJECT TITLE: Electrical Simulation and Test on Novel Composite Cross-Arm and Pylon
PhD period: 2015.10.01 – 2018.06.30.
Section: Electric Power Systems
Research Programme: Modern Power Transmission Systems
Supervisor: Claus Leth Bak
Co-Supervisor: Filipe Miguel Faria da Silva
Collaborators: Bystrup Architecture Design & Engineering, Tuco Marine ApS and DTU Mechanical Engineering.
Funding: The Danish National Advanced Technology Foundation (HTF).
The world is taking efforts to move into a cleaner planet which has to respond to issues such as a big increase in energy consumption over the next decades. With the limitation of traditional resources, the whole world pays more attention to distributed generation and renewable resources, which make the transmission system undergo major changes now and in the years to come. Also, growing opposition to the new projects with the use of traditional towers has emerged because traditional towers have paid few attention to visual appearance over the past 70 years. Underground cables, as an alternative to overhead transmission lines (OHLs), are more costly, and in some cases, only technically feasible for short distances. So to strike a balance among the need for capacity increase, visual impact and economic issues, a new type of transmission tower needs to be design which should be much smaller, more compact and friendly visual impact.
To fulfill this goal, an innovative transmission pylon is introduced in the project titled as Power Pylons of the Future (PoPyFu), which aims at the next generation of design OHTLs with benefits to both end-users (TSOs) and the public. The T-pylon is a whole composite pylon which means not only the cross-arm is made of composite material, but also the pylon body is insulated which is quite different from the traditional tower. Meanwhile, the functions of the composite cross-arm are supporting the conductor as well as insulating the conductors and the pylon body, getting rid of the use of insulator strings which makes the pylon more compact. The compactness of the pylon enjoys great advantages of reducing the transmission corridor while increasing the transmission capacity, reducing the cost and appearing more desirable to the public. Thus the T-pylon has a good application prospect.
As the configuration of the pylon is quite different from the traditional transmission towers, the technical experience and international standards for the design and validation of the T-pylon are scarce. Thus, the assessing methods to validate the feasibility of the unconventional pylon should be proposed. The main purpose of this PhD project is to develop testing methods for assessing electrical performance of the novel composite cross-arm and pylon. This includes both electrical insulation coordination tests as well as test methods to be used for estimating dielectric behavior of the composite material and assess lifetime degradation mechanisms.
Publications in journals and conference papers may be found at VBN.