Simulation the transient over voltage caused by lightning and protect transmission line against it

In this paper the mechanism of transient overvoltage caused by lightning is discussed. Also, in order to protect transmission line against the overvoltage of lightning, the factors that can reduce its destructive power are studied by ATP software. In order to consider the effect of frequency changes in model, the J-Marti model in EMTP software is used. In this paper, effective factors on inducted voltage such as, current amplitude of lightning, conductor height from ground level, line length and the effect of lightning arrester and its installation place to the induced voltage are considered. Simulation results show that the induced voltage is proportionate to the amplitude of the lightning and conductor height. Frequency of Inducted voltage increased by the line length and also if lightning accrued on a phase, the dangerous voltages can be induced in the other phases and lightning arrester must be installed in three phases.

کلیدواژه ها:

active fault tolerant MPC ، Sliding mode observer ، control effectiveness Factor ، Satellite Attitude control system