Lightning and High-Voltage Phenomena

Oscillation Phenomena in Isolated High Voltage Networks Caused by Lightning Strokes

Isolated networks are common practice for operating high voltage networks up to a small earth fault current defined by standards. The reason for choosing this type of network are the saving of the arc suppressing coils by coexistence of a self-healing grid in case of an earth fault. During the starting up of a 110-kV-isolated network long-time measurement were installed. During these measuremen...

SF6 High Voltage Circuit Breaker Contact Systems Under Lightning Impulse and Very Fast Transient Voltage Stress

In the past few years gas insulated high voltage circuit breakers have improved considerably, in particular with respect to required drive energy for operation, compactness and reliability. A further reduction in size implies increasing operational field stress inside the breaker and, thus, a reduction in built-in safety margins. If the design comes closer to its physical limits, in particular ...

Protection of Medium Voltage and Low Voltage Networks against Lightning Part 2: Lightning protection of Medium Voltage Networks

Statistical analysis of the lightning performance of high voltage OHLs using dynamic simulation of lightning leaders movements

0142-0615/$ see front matter 2010 Elsevier Ltd. A doi:10.1016/j.ijepes.2010.02.002 * Corresponding author. Tel.: +98 9133981029; fax E-mail address: [email protected] (M.R. Bank In this paper a simulation ground is designed to track the lightning path from cloud to the striking point on high voltage overhead line (OHL) structures. By using this simulation method, the strikes to towers, pha...

High frequency input impedance modeling of low-voltage residential installations - influence on lightning overvoltage simulations results

The overvoltage level of a system is strongly dependent on the connected loads and with more precise models, better and more reliable simulation results are obtained. This paper presents the input impedance characteristics, measured over a wide range of frequencies, of various actual low-voltage residential installations. The measured frequency responses were fitted by effective RLC models and ...