Investigation on magneto-thermal-structural coupled field effect of nano coated 230 kV busbar

Abstract

The coupled field, Magnetic-thermal-structural analysis has been carried out for 230 kV bare and nano Fe coated busbar. The integrated coupled field analytical equations were developed by using electrical parameters to predetermine the temperature rise and mechanical stress. The finite element method software ANSYS APDL commercial package has been used for simulation analysis with magneto-thermal-structural sequential weak coupling methods. The 6061-T6 hollow aluminium busbar size of 1 m length and 8 mm thickness with the load current of 1000 A was modelled and the magnetic field effect was analysed through magnetostatic solver. From the analysis, it was inferred that the nano iron coated busbar diminishes the magnetic field around 80% in the vicinity areas. The magnetic field reduction is achieved by high conductivity and high permeability of the material. It also reduces the rise of temperature by 4 °C with the property of high thermal conductivity, thus reduces the thermal flux by 50 W m−2. Thermal dependent mechanical stress is decreased by 35% for coated conductor compare with the bare conductor. Due to the thermal expansion coefficient, the coated material aid to protect the busbar against the mechanical stress. The simulation results were analyzed and compared with the analytical results. The nano coated conductor exhibit the low electromagnetic pollution in the environment by reducing the electromagnetic field and temperature rise.

Optimization of spatial arrangement of magnetic field sensors of closed loop system of overhead power lines magnetic field active silencing

“…A similar situation is typical for most industrialized countries of the world [8][9][10][11]; however, in these countries, normalization technologies of magnetic field of existing power transmission lines have already been created and are widely used [12][13][14][15][16]. The most effective technology is the reconstruction of power transmission lines by removing it to a safe distance from residential buildings, or replacing an overhead transmission line with a cable line.…”

“…In this minimax optimization problem it is necessary to find the minimum of the vector objective function (11) by the vector X, but the maximum of the same vector objective function by the vector .…”

“…(12) Note that the components of the vector criterion (11) and constraints (12) are the nonlinear functions of the vector of the required parameters of the regulators and their calculation is performed basis on the Biot-Savart law [5,6].…”

“…The method for problem solving. The solution of the vector minimax optimization problem wits vector objective function (11) is the set of unimprovable solutions -the Pareto set of optimal solutions if only one vector objective function is given [48,49]. Such a statement of the optimization problem is an ill-posed problem, since the solution in the form of a Pareto optimal set of unimprovable solutions is devoid of engineering sense from the point of view of practical application [50,51].…”

The method of multi-objective parametric design of magnetic field active canceling robust system for residential multy-story buildings closed to double-circuit overhead power lines

“…Therefore, over the past 15 years, sanitary standards constantly strengthened around the world from the maximum permissible level of magnetic field (MF) induction of power frequency and intensive research is being conducted to develop methods for normalizing the magnetic field [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”