Transient causing overvoltages occur in the system due to
different causes, and the peak values of these can be much in excess of
the operating voltage. Therefore, an area of critical importance in the
design of power systems is the consideration of the insulation
requirements for lines, cables and stations. Transient overvoltages due
to the energizing of capacitor banks are the most common source of
overvoltages on many power systems. There is however a problem
that is associated with the switching of a capacitor bank. Transient
overvoltages are always created during this switching. This paper
analyzes the instantaneous values of the voltages during the capacitor
banks switching. Several switching cases are developed represented and
simulated using MATLAB/SIMULINK software in order to evaluate
the conditions which affect the associated capacitor bank energization
transient overvoltage. The simulations tacked into account the operation
of different switches, using the Fast Fourier Transfer (FFT) the total
harmonic content of transient overvoltages and currents waveforms
is estimated at all system buses.
Keywords-component; Switching capacitor bank; Transient
overvoltages and currents; Fast Fourier Transfer (FFT) |
