Analysis of Cause and Solutions for the Damaged 115 kV Cable Connector Used by the Metropolitan Electricity Authority

MEA’s 115 kV underground cables are used to transmit the power from the terminal station to other terminals due to high stability and beautiful design. In the case of long-distance transmission lines, it is necessary to connect the line with a 115 kV cable connector. In the past, it was found that connectors have a relatively high failure rate, especially those produced by certain manufacturers. This damage greatly reduced the stability and reliability of the MEA's power system. Therefore, this paper will analyze the cause of the problem and present solutions in the future.

I. Introduction

Nowadays, instead of overhead transmission lines, underground cables are increasingly being used by Metropolitan Electricity Authority (MEA) which operates in Bangkok Metropolitan of Thailand. This is because of the cable’s high stability and the areas without the overhead transmission lines become clean and beautiful. MEA’s 115 kV underground transmission line is one of the most important lines to send electricity to the high voltage customer or between terminal stations. A failure of the underground transmission line equipment will lead to widespread power outages, causing negative impact on the economy.