The Integrity of ACSR Full Tension Single-Stage Splice Connector at Higher Operation Temperature

Wang, Jy-An John¹  Lara-Curzio, Edgar¹  King Jr, Thomas J¹ 

[1] ORNL

关键词: AGING;    CONNECTORS;    DESIGN;    ELECTRIC POWER;    ELECTRICITY;    HOT SPOTS;    LIFETIME;    OVERHEAD POWER TRANSMISSION;    POWER DEMAND;    POWER TRANSMISSION LINES Overhead Transmission;    Single Stage Splice Connector Fitting;    Thermal Cycling;    High temperature operation;   

DOI  :  10.2172/950000
RP-ID  :  ORNL/TM-2008/156
PID  :  OSTI ID: 950000
Others  :  Other: TD5216000
Others  :  TD5008010
Others  :  600303000
Others  :  CETD004
Others  :  TRN: US200910%%160

学科分类：电力

美国|英语

来源: SciTech Connect

【 摘 要 】

Due to increases in power demand and limited investment in new infrastructure, existing overhead power transmission lines often need to operate at temperatures higher than those used for the original design criteria. This has led to the accelerated aging and degradation of splice connectors. It is manifested by the formation of hot-spots that have been revealed by infrared imaging during inspection. The implications of connector aging is two-fold: (1) significant increases in resistivity of the splice connector (i.e., less efficient transmission of electricity) and (2) significant reductions in the connector clamping strength, which could ultimately result in separation of the power transmission line at the joint. Therefore, the splice connector appears to be the weakest link in electric power transmission lines. This report presents a protocol for integrating analytical and experimental approaches to evaluate the integrity of full tension single-stage splice connector assemblies and the associated effective lifetime at high operating temperature.