Abstract
Capacitor bank system in substation has been a topic of interest in these past few years because of its advantage on system. This paper presents a study on transient signal that occurs when switching capacitor is integrated into the system. The method is based on building a capacitor bank switching experimental setup, which is downscaled from Electricity Generating Authority of Thailand (EGAT) at NongChok substation. This experimental setup is aimed to investigate transient signal in capacitor bank switching that has impact on the power system, such as inrush current and voltage transient. The result shows that switching transient causes an inrush current with high amplitude compared to nominal current. Moreover, an inductor installed in the system can limit inrush current; when inductor size is increased, inrush current will be decreased.
Highlights
In recent year, topic of interest in substation research is to reduce loss and increase power efficiency in distribution system
Capacitor bank consists of small capacitor unit connected in series and parallel inside enclosed bank. These banks provide reactive power to the system to compensate with inductive loads connected
The purpose of this paper is to study and present impact of switching transient generated from capacitor bank
Summary
Topic of interest in substation research is to reduce loss and increase power efficiency in distribution system. One of the systems that can solve this issue is capacitor bank system. Capacitor bank consists of small capacitor unit connected in series and parallel inside enclosed bank. These banks provide reactive power to the system to compensate with inductive loads connected. High power capacitor bank in substation can make system stabilized when voltage drop occurs due to peak period. Other advantages of adding capacitor bank in the system are loss reduction while power is transmitted between regions and power capacity increasing in transmission system (1)
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