overvoltage

Mathematical and digital models to study the long line switching processes with regard to their basic parameters are developed, providing the required adequate modeling.

In modern industrial power supply systems, there is observed rapid growth of time varying nonlinear loads having low power factor. The most adequate engineering solution for reactive power compensation of the loads is using compensation units including multiple single tuned passive filters. The practice of operating multiple single tuned filter circuits in the power supply systems has shown that switching transients in the supply system can generate high overvoltages and overcurrents on the filter circuit components.

The influence of iron sulfides created on 0.45%C steel and microstructure of this steel
on hydrogen overvoltage was investigated. It was shown, that iron sulfides on the surface of
0.45%C steel, usually, decrease hydrogen overvoltage of hydrogen depolarization. The
greatest effect was created by the cansite films. Corrosion of ferrite-perlite microstructure
passes under anode control. Corrosion of troostite microstructure passes under mixed
cathode-anode control, and for sorbite and martensite microstructures it passes under cathode