Mathematical model of turbine unit considering shaft line torsional vibrations

The article considers a complex mathematical model of a turbo-unit for studying transient processes in order to clarify the mechanical strength indicators of the design elements. Significant danger for the unit is posed by alternating torques with frequencies of 50 and 100 Hz, arising during short circuits in the electrical network. An important element is the model of a diode brushless exciter located on the same shaft with a generator, which is a powerful electric machine operating in a transient mode under the control of an automatic excitation regulator. It is shown that electromagnetic torques arising during short circuits can negatively affect the mechanical strength of the design elements of the turbo-unit, in particular, the connection between the generator and the exciter.

Authors: A. A. Safronov, F. V. Chmilenko, V. D. Rozhdestvensky, Yu. D. Dudnik

Direction: Electrical Engineering

Keywords: synchronous generator, diode brushless excitation system, asymmetric short circuit, non-simultaneous short circuit

---

View full article