Abstract
Following the theory and method of the ‘same‐phase power supply scheme’, as declared in United States and Taiwan patents, a novel power supply method is proposed to reduce damage to users when the supply power is in shortage. This paper proposes using the equivalent model function blocks, as built by MATLAB/Simulink, for simulations of the probable line‐to‐line and single line‐to‐ground faults in a distribution system when the power supply mode is switched from ‘normal’ to ‘same‐phase’. The simulation results prove that, when the power supply is switched to the ‘same‐phase’ power supply mode, all the short‐circuit fault currents are a little lower than that in the ‘normal’ power supply mode, and the maximum difference is less than 3%. Therefore, when the supplying power of the system is in shortage or the power distribution system has a short‐circuit fault between phase lines, the system can be directly switched to the ‘same‐phase’ power supply mode and can continue supplying power to the essential and basic loads for life‐support and people's livelihoods. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
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