Details

Autor(en) / Beteiligte

• Hernández-Guiteras, Joan
• Riba, Jordi-Roger
• Romeral, Luís

Titel

Improved design of an extra-high-voltage expansion substation connector through magnetic field analysis

Ist Teil von

• Simulation modelling practice and theory, 2014-04, Vol.43, p.96-105

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Extra high voltage substation connectors deliver large amounts of electric current.•A 400kV – 3000A substation connector with four aluminum wires is analyzed.•Preliminary tests showed an unequal current distribution through the wires.•3D finite element simulations are used to improve the design.•Experimental results show an improved performance of the redesigned connector. In many countries worldwide, the energy demand is growing faster than the transmission capacity. However, due to environmental constrains, social concerns and financial costs, the construction of new power transmission lines is an arduous task. In addition, power transmission systems are often loaded close to their nominal values. Therefore, improving power transmission system efficiency and reliability is a matter of concern. This work deals with a 400kV, 3000A, 50Hz extra-high-voltage expansion substation connector used to connect two substation bus bars of 150mm diameter each. This substation connector has four aluminum wires which provide the conductive path between both bus bars. Preliminary tests showed an unequal current distribution through the wires which was mainly attributed to the proximity effect. A three-dimensional finite elements method approach was applied to improve the design and evaluate the electromagnetic and thermal behavior of both the original and improved versions of the connector. Experimental tests made under laboratory conditions have validated the accuracy of the simulation method presented in this paper, which may be a valuable tool to assist the design process of substation connectors, therefore allowing improving both the thermal performance and reliability of the redesigned connectors.