Electric power system, method and voltage regulator for controlling excitation of generator, storage medium

Abstract

The invention provides a power system, a method for controlling the excitation of a generator, a voltage regulator, and a storage medium. The power system comprises: at least one synchronous generator (101); a signal converter (102) for generating a magnitude signal indicative of the magnitude of the generator voltage; and a controller (103). The signal converter and controller are part of a voltage control loop for controlling the excitation of the synchronous generator based on the magnitude signal and the reference magnitude. The voltage control loop includes a band-stop filter (104) or another signal conditioning device for suppressing frequency components corresponding to torsional mode oscillations of the rotating system including synchronous power generation The rotor of a machine and the rotating part of an engine or another prime mover. Thereby, the unfavorable phenomenon that the voltage control loop sustains or even amplifies torsional mode oscillations can be avoided.

Description

technical field [0001] The present disclosure generally relates to power systems including one or more synchronous generators. More particularly, the present disclosure relates to a method for controlling excitation of a synchronous generator and a voltage regulator for controlling excitation of a synchronous generator. Furthermore, the present disclosure relates to a computer program for configuring a voltage regulator of an electric power system. Background technique [0002] In many cases, an electrical system for generating electrical energy includes one or more prime movers arranged to rotate one or more synchronous generators. Each prime mover may for example be a turbine or a piston engine such as a diesel engine. For each synchronous generator, the power system comprises an excitation device configured to supply an excitation current to a rotor winding of the synchronous generator under consideration. The excitation device can be, for example, a non-contact rotati...

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Problems solved by technology

[0004] However, control systems of the kind described above are not immune to the challenges

One challenge is that a Power System Stabilizer "PSS" may have an adverse effect on the damping of torsional mode oscillations that may occur in a rotating system including the rotor and turbine of a synchronous generator or the rotating part of another prime mover

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