Preliminary communication

Stabilization of the Electromechanical Oscillations of Synchronous Generator

Damir SUMINA ; Faculty of Electrical Engineering and Computing University of Zagreb, Zagreb, Croatia
Neven BULIĆ
Srđan SKOK ; Faculty of Engineering University of Rijeka, Rijeka, Croatia

Abstract

Power system stabilizer (PSS) is used in synchronous generator excitation control system for damping electromechanical oscillations. The objective of the PSS is to generate a stabilizing signal, which produces a torque damping component on the generator rotor. Created torque component must be in phase with speed deviation. Today’s power system stabilizers (IEEE types) use speed deviation and/or acceleration of synchronous generator as input signals and are based on a phase compensation method. This paper compares the performance of IEEE type PSS1A and PSS2B stabilizers. The algorithms of stabilizers were implemented into the DSP based digital control system and tested in a laboratory environment on an 83kVA, 50Hz synchronous generator connected by transmission lines to the power system. The stabilizers’ performance was compared in cases of voltage and active power change. In case of voltage change, both stabilizers performance is satisfactory, whilst in the case of active power change, only the PSS2B satisfies. The PSS1A stabilizer generates an unwanted stabilizing signal and causes variations in voltage and reactive power.

Keywords

Excitation control; Power system stabilizer; Synchronous generator

Hrčak ID:

78446

URI

https://hrcak.srce.hr/78446

Publication date:

30.6.2011.

Article data in other languages: croatian

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