Abstract
This paper presents a useful software tool to analyze an industrial power system. The program has two main functions. One is to let the personnel of the industrial plant graphically set up and access the electrical database, such as filtering or searching information. The database can be included in the company documentation. Based on the database, the other is to graphically perform a load-flow analysis and short-circuit current calculation on a PC. Considering the structure and connection of transformers, a system analysis is performed with appropriate phase shifts. In addition, the unbalanced fault current calculation is generalized with all types of faults happening in a power system such as single-phase fault or multiphase fault, with or without faulted impedance, and bus faults or cable faults. Using the results of load-flow analysis as the prefault condition instead of preset voltage, one can obtain more accurate and practical results. Therefore, this program is very useful for industrial companies to analyze their electrical power system and train their electrical personnel.
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