Analysis of PD Pulses in Transmission Wire Line Network

The aim of study is to understand Partial discharge, in order to locate this phenomenon within an HV system. Voltages 110 kV and above are regarded as transmission level voltages. In long lines with light loads, lower voltages like 66 kV and 33 kV are frequently used. These lower voltages are known as sub transmission voltages. For distribution, voltages less than 33 kV are generally used. Voltages above 230 kV are regarded extra high voltage and above 765 kV are considered ultra high voltages. The equipment used at higher voltages is of different design when compared to the equipment used at lower voltages. It is necessary to design and develop a compact and cost effective insulation structure for a proper power transmission at higher voltages. Due to mechanical, thermal and electrical stress, the insulation may breakdown which leads to catastrophic failure of the device. Hence it is necessary for the users to have a warning device which gives advance notice about the potential insulation problems so that they may be repaired during a scheduled shutdown.