| Lightning-induced voltages in power systems are nowadays one of the causes of the main power quality and electromagnetic compatibility issues. In recent years, due to the increasing demand by customers for good quality in the power supply along with the widespread use of sensitive devices connected to distribution lines, the protection against lightning-induced disturbances became of primary importance. Installing pipelines in energy utility corridors containing high-voltage AC transmission lines subjects the pipelines to induced AC voltages which are a real and serious problem which can place both operator safety and pipeline integrity at risk. In case of a lightning strike on power line, the electromagnetic field produce by this pulse induces voltages in the nearby metallic structures. An electromagnetic interference analysis has been performed in case of a metallic gas pipeline that runs nearby a 110 kV/ 50 Hz power line. Different scenarios regarding the lightning strike on HVPL were investigated. Due to high value of the separation distance between HVPL and MP, only the effect of inductive and capacitive coupling is taking into account. Professional software for power system transients (EMTP-RV) is used to create an original transient state equivalent electrical circuit model of the system and to perform simulation of the transient process during lightning strike and compute the induced voltages in the metallic pipeline. |
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