Measurement methods of earthing resistance of transmission towers

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Dr. Ladányi József
Department of Electric Power Engineering

Nowadays electricity has become an essential part of our lives. In order to transfer the electric energy to application from power stations, we need transmission line networks with good conductivity and low energy loss rate. Electricity must be generated constantly because we don’t have the right technology yet to store the electric energy in large quantities, so the network must be reliable too.

Our question is that how we can make sure of reliability of service of parts of the network. Obviously we have to find a measurement method that can be done easily and without causing any damage. To avoid any pause in the service, the network can’t be disassembled at all or not for a long period during the measurement if possible.

In the spring and summer of 2012, I had the opportunity to take part in diagnostics during my internship and a measurement organized by the University. This way I could gain experience in person in measuring earthing resistance of HV transmission line towers.

My theory consists of three main parts. In the first part, I define the basic terminology and the measurement methods, after that I present the computer simulation and the model that I created. In the last part I write about the real measurement that I took part in. My main aims are to present the high frequency measurement method and to compare the results of the simulation and the actual values to prove the theoretical method right.


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