WSEAS Transactions on Power Systems
Print ISSN: 1790-5060, E-ISSN: 2224-350X
Volume 14, 2019
The Development of an Isolated Electric Power System Model to Determine the Voltage Dips During the Induction Motor Start
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Abstract: The article develops a model of an isolated electric power system with three diesel-generator units to calculate the voltage dip when the induction motor is connected. The necessity to estimate the voltage dip when connecting the induction motor to the generator is substantiated, and for this purpose a model experiment is proposed to be used. A block diagram of a power plant model for calculating voltage dips is presented. Algorithms of the synchronization system and power distribution system between generators in the form of digital automata have been developed. The use of transition graphs as a specification language for the description of operation algorithms of automation tools allows their software implementation on the basis of microprocessor technology. The modeling of the power plant operation in dynamic modes was carried out; oscillograph records of voltage dips when connecting induction motors of various rating were obtained. A software shell has been developed allowing the power station operator to estimate the magnitude of the voltage dip when an induction motor is connected, and, if necessary, to change the power station operation mode by connecting an additional generator to provide power reserve.
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Keywords: isolated power plant, diesel-generator, induction motor, voltage dip, modeling, digital automaton, transition graph.
Pages: 223-233
WSEAS Transactions on Power Systems, ISSN / E-ISSN: 1790-5060 / 2224-350X, Volume 14, 2019, Art. #28