Title :
Discrete-Time Dynamic Model of NGH Damper
Author :
Cheriyan, Elizabeth P. ; Kulkarni, A.M.
Author_Institution :
Indian Inst. of Technol. Bombay, Mumbai
Abstract :
This paper presents a linearized discrete-time model of a pre-firing NGH damper based on the Poincare mapping technique. The performance of a pre-firing NGH damper can be predicted accurately with this model, including the possible undamping of off-tune torsional modes which has been reported in the literature. The paper analyzes two types of pre-firing schemes, one based on voltage zero crossings and the other based on a current synchronized phase-locked loop. The model is validated using digital simulation studies.
Keywords :
discrete time systems; power system control; power system simulation; subsynchronous resonance; vibration control; NGH damper; Poincare mapping technique; current synchronized phase locked loop; digital simulation; discrete time dynamic model; voltage zero crossings; Damping; Digital simulation; Phase locked loops; Power capacitors; Power transmission lines; Resistors; Resonance; Shock absorbers; Thyristors; Voltage; NGH damping scheme; series compensation; subsynchronous resonance (SSR);
Journal_Title :
Power Systems, IEEE Transactions on
DOI :
10.1109/TPWRS.2007.907352
