engleski

The Dynamics of Diesel-Generator Unit in Isolated Electrical Network

The paper analyses behaviour of diesel-generator units in isolated power system. The aim of this paper is to investigate dynamics due to electrical loads and due to torsional strains on the shaft cable during direct impact load on a such grid. For the purposes of this analyze mathematical model of integral motor drives has been developed. The model includes: a prime mover and speed governor, synchronous generator with voltage control, passive load and induction motor drives. Diesel generator unit is represented as a system with two concentrated masses, synchronous generator rotor and rotating mass of diesel engine, thus the analysis of torsional dynamics during direct-on-line starting of induction motors is allowed. In order to make changes to the loading of an existing isolated electrical grid, it is necessary to analyse and document the effect of the additional loads on its normal and transient performance. This can be achieved by implementing modelling and simulation methods in the designing of power systems.

Isolated electrical network; diesel generator-unit; synchronous generator; torsional torque; induction motor starting

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