An investigation on the use of power system stabilizers for damping inter-area oscillations in longitudinal power systems

Use of power system stabilizers for damping inter-area oscillations in the south systems of the Mexican electrical grid

“…A number of transmission lines were identified for assessment of power system behavior and contingency analysis, namely: Of particular relevance are the central-to-west and the southeastern-to-central power transfers since they limit the transmission of major generation [7]. Under normal operating conditions the power flow is from the SE and W systems to the central region; critical outages of 400 kV lines linking the SE system to the C system result in a significant weakening of the transmission system and may lead to undamped post-fault oscillations.…”

“…The Mexican interconnected system (MIS) exhibits several critical inter-area modes associated with the interaction of machines spread out over a large geographical area. Lowfrequency inter-area oscillations with periods in the range of 0.2-1.0 Hz have been routinely observed in both analytical studies and actual system recordings [4][5][6][7]. Troublesome oscillations manifest relatively strong magnitudes and contribute significantly to variations of power in critical interconnections and electrical power at major generating stations [5,7].…”

“…Lowfrequency inter-area oscillations with periods in the range of 0.2-1.0 Hz have been routinely observed in both analytical studies and actual system recordings [4][5][6][7]. Troublesome oscillations manifest relatively strong magnitudes and contribute significantly to variations of power in critical interconnections and electrical power at major generating stations [5,7]. Damping assessment and control of these modes is quite challenging and requires the identification of modal characteristics under conditions of varying load and changes in system configuration [6,8].…”

Decentralized exciter stabilizing control for multimachine power systems

“…Furthermore, PSS, which requires lower investment, is much more economical to introduce than FACTS equipment when the effectiveness of introduction is the same. The study of PSS design is also important and it is necessary to consider not only PSS design itself [4] but also coordination between PSS and FACTS [5].…”

Active Splitting in Longitudinal Power Systems based on a WAMPC

“…Among the most critical stability concerns are those related to transient and voltage stability [3], including low frequency oscillations (from a small signal stability viewpoint), and voltage collapse. Indeed, sustained low frequency oscillations [13][14][15][16] as well as voltage instability situations [17][18][19] have been reported in several power systems with longitudinal structure.…”