TITLE:
Effect of Switching Devices on Power Quality and Transient Voltage Suppression Using Capacitor Bank Model
AUTHORS:
Isaac Kofi Mensah Prah, Joseph Cudjoe Attachie
KEYWORDS:
Capacitor Banks, Inrush Current, Laplace Transform, Power Quality, Posi-tive Sequence, Switching, Transient Voltage
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.10 No.5,
May
31,
2022
ABSTRACT: The main purpose of the electrical power system is
to transport and distribute energy generated by the central power plants in a
safe and reliable manner to the customer premises. Most of the electrical
equipment is exposed within the open which suggests they can be vulnerable to
lightning strikes, road dwindling, windstorms, and a few engineering activities
with the potential of causing different degrees of damage to the electrical
equipment. One of the ways to guard the equipment is to deploy switching devices.
However, the operations of most of these switching devices produce oscillatory
transient in the electrical transmission and distribution systems which result
in voltage, current, and frequency fluctuations in the load. This paper
investigates the effect of switching devices on power quality and proposes a positive sequence voltage power transient suppression technique that can spontaneously improve the
distorted voltage at the instant of capacitor switching using the capacitor line model as a case study. MATLAB/Simulink software
was utilized for the analysis on an electrical network model with bus voltages
of 69 kV/12.47 kV and 480 V. The results showed that, during switching
operations, the positive sequence voltage power detector block produces ripple-free
accurate results.