Development of Economical Hardware Enhancement for Load Break Switch in
Smart Distribution Network
Abstract
This study explores the design and evaluation of an economical hardware
platform aimed at enhancing load break switches (LBS) in distribution
systems. Simulations conducted using DIgSILENT Power Factory and PSCAD
validated the proposed method. The Provincial Electricity Authority of
Chiang Mai Province successfully implemented this hardware platform in
the Ban Khun Pae Smart Microgrid project. The hardware platform
underwent rigorous laboratory testing using an overcurrent algorithm to
detect fault currents. It successfully identified all potential issues,
including saturation currents on feeders, and autonomously transmitted
data to operators for timely corrective action. The findings confirmed
that single line-to-ground fault currents were the most frequent fault
type. The Intelligent Electronic Devices relay and the InHand Wireless
Overhead-Line System fault current detectors at the site worked just as
well as the improved LBS, showing that they are strong and reliable ways
to find faults. This economical and efficient platform not only enhances
operational reliability but also paves the way for improved fault
monitoring and management in distribution systems, ensuring faster
response times, and minimizing downtime during faults. The seamless
integration with existing feeder infrastructure further highlights its
practical utility and scalability, providing an innovative solution to
the challenges faced in modern distribution networks.