Evaluation of the influence of repair-joint number increase on the outage frequency of medium voltage cables

A method for forecasting the outage frequency of cable sections including the influence of repair-joint increase is presented. Time series of joint numbers are processed by a computation procedure applying aging models for cable sections and joints. The methods were tested using data of a real-life medium voltage cable network. It could be shown that outage frequency of cable sections can be substantially reduced by appropriate maintenance measures.