Open AccessClarification on power system stabiliser design
Author(s) -
Ma Jin,
Wang Hao Jing,
Lo Kowk Lun
Publication year - 2013
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2012.0219
Subject(s) - stabiliser , reliability engineering , power (physics) , computer science , electric power system , risk analysis (engineering) , biochemical engineering , engineering , business , materials science , nanotechnology , physics , quantum mechanics
The application of power system stabiliser (PSS) since 1960s has exerted a great effect on improving power system dynamic stability and has become a very important auxiliary excitation control measure to deal with low frequency oscillation. The common design approach is to compensate for the phase lag caused by the excitation system, and thereby increase damping of the system. Is that the real key in stabilising the system? This study clarifies the damping torque concept and analyses the flaws of the damping torque‐based PSS design theory. The key parameters in PSS design to stabilise the power system are fully investigated, based on which the study reveals the real nature of the PSS working mechanism. It has been shown in the study that phase compensation is not the necessary condition in stabilising the system; stabiliser gain is very important for controller design. Case studies in the real power system validate the analysis results.