Investigation of the Ampacity of a Prefabricated Straight-Through Joint of High Voltage Cable
نویسندگان
چکیده
This paper presents a theoretical and experimental study on the ampacity of the prefabricated straight-through joint of a 110 kV high voltage cable. Thermal modelling revealed that the critical spot limiting the ampacity of this type of cable joint is located on its crosslinked polyethylene (XLPE) insulation section. The axial distribution of the thermal field in this type of cable joint was also determined. An algorithm for assessing ampacity in this type of cable joint was developed. Experiments were conducted on a real cable system with a prefabricated straight-through joint under different loading conditions. The experiments show a good agreement with the thermal modelling results.
منابع مشابه
Electrical and Thermal Analysis of Single Conductor Power Cable Considering the Lead Sheath Effect Based on Finite Element Method
This paper investigates the effect of metallic sheaths on losses and temperature of medium voltage power cables. Two grounding methods of sheaths, including both ends bonding and single point bonding that causes different situations on cable ampacity, are considered. Electrical losses of cables that are main sources of heat are calculated in both conductor and metallic sheath of the cables. She...
متن کاملSeismic Behavior of Prefabricated Column-Footing Connection
Results of an experimental investigation of the seismic performance of prefabricated column-footing connections are presented. Tests were conducted on six 1/4-scale prefabricated column specimens inserted into prefabricated footings in two Groups. Group-1 consisted of four specimens, which were tested under constant axial load and cyclic inelastic lateral displacements. The remaining two specim...
متن کاملComputation of Cable Ampacity by Finite Element Method Under Voluntary Conditions
This paper presents a new approach for the determination of underground cable ampacity that considers natural convection of air inside a conduit and heterogeneous soil around the conduit, and compares calculated results with conduit-less considerations. It shows how ampacity of a buried cable is affected by thickness of the soil above it, and by the surrounding soil’s heterogeneity and thermo-p...
متن کاملEffects of Stress Grading Materials’ Properties on the Performance of 20-kV Cable Terminations
Stress grading (SG) layer in cable terminations limits the critical electric field and properties of SG materials are important issues which have to be considered during manufacturing and selecting procedure. In this paper, two different types of (SG) materials are analyzed by both theory and test. According to the applied theory, important parameters as: electrical resistivity, breakdown volta...
متن کاملNumerical solution of base shear in high tensioned cable antenna
A finite element solution based on equevalent elements is proposed for the static and dynamic analysis of tallhigh tensioned cable antennas. To reduce high number of degrees of freedom in space frame body of a structure, a simple equivalent beam element is defined for each simulative substructure. This numerical procedure is applicable to analyze complex three dimensional assemblies of substruc...
متن کامل