Disturbances at the commutation of the condensers batteries as part of the national Electrical Energetic System

The study presents the main electromagnetic stresses, generated by the transition state which happened at the commutation of simple and multiple condensers batteries. For successful compensation of wattless-inductive energy, the condensers batteries are characterised in the connection process by the powerful current shocks and by the dangerous increase of voltage for security function of the Electrical Energetic System and even of the surrounding environment. Thus, in the connection process and reenergization, the electric arc, powerful current shocks (with values from tens and even hundreds multiply by nominal current value), which produces dynamic, thermic stresses, from wear of electric contacts and from degradation of extinction environment of circuit breakers, appeared. At the disconnection of simple batteries but more striking at the disconnection of multiple condenser batteries, an important commutation overvoltage can appear, which in certain cases can become very dangerous for the apparatus-network and sometimes even for the environment. Both the transition current shock at connection and the commutating overvoltages at disconnection, generate important values of magnetic and electric fields, which, through their amplitudes, but especially the rapid variation in time direct to important stresses, sometimes cause destructive effects as part of the Electrical Energetic System. These phenomena are analysed, in theoretical aspects and illustrated in practical aspects