Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

Browse

Author: search.filters.author.Shubhanga, K.N.Subject: search.filters.subject.Subsynchronous resonance

Search Results

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    Performance of power system stabilizers in a fixed series capacitor compensated system
    (2011) Shashidhara, M.K.; Shubhanga, K.N.
    In this paper, the performance of two IEEE-type power system stabilizers (PSS), i.e., a slip-signal PSS and a Delta-P-Omega PSS are studied in a fixed series capacitor compensated system employing the IEEE first benchmark system. An eigenvalue analysis of the well-known slip-signal-torsional interaction showed that the slip-signal-interactions occur only when the degree of line compensation is above a certain level depending on the loading condition. The time-domain verifications of the eigen-predictions are carried out through modal speed plots instead of a confusing participation factor-based method. Further, the swing-mode damping performances of PSS are analyzed for different levels of series compensation. This study not only validated the poor swing-mode damping performances of a slip-signal PSS, but also demonstrated that a Delta-P-Omega PSS does not worsen the damping of swing-mode even at higher levels of series compensation which permits a straight forward PSS design. © 2011 IEEE.
  • No Thumbnail Available
    Item
    Some aspects of power system stabilizer performance in subsynchronous resonance study
    (2011) Shashidhara, M.K.; Shubhanga, K.N.
    In this paper, behavioural aspects of two types of power system stabilizers (PSS), i.e., a slip-signal PSS and a Delta-P-Omega PSS are studied in a fixed series capacitor compensated system employing the IEEE first benchmark system for SSR study. The well-known slip-signal-torsional interaction is studied to understand its dependency on the magnitude of network compensation. From such a study it is noted that the slip-signal-interaction is prominent only at higher degree of line compensation. It is also shown that Delta-P-Omega PSS is immune to such torsional interactions. Further, using the eigenvalue-based study, the swing-mode damping performance of slip-signal PSS and Delta-P-Omega PSS are studied when a system is series compensated. This study not only demonstrated the superiority of Delta-P-Omega PSS, but also validated the poor performance of slip-signal PSS. All these observations are verified by carrying out simulations on PSCAD/EMTDC. To enhance the understanding about the SSR phenomenon, some fundamental observations made in the study are also listed. © 2011 IEEE.
  • No Thumbnail Available
    Item
    Dynamic phasor modelling and simulation
    (Institute of Electrical and Electronics Engineers Inc., 2016) Kotian, S.M.; Shubhanga, K.N.
    In this paper, the basics of dynamic phasor (DP) modelling has been introduced by employing a simple RL-series circuit. In the example, the actual time-domain simulation and the DP-based simulation are presented in addition to the eigenvalue analysis of the RL-circuit in the DP-domain. With this introduction, following a systematic procedure, the DP-model of a static VAr compensator (SVC) which involves periodic switchings, is derived. To verify this model, a case study with an SVC in the IEEE first benchmark system for subsynchronous resonance (SSR) study has been simulated. The simulation results are also compared with those obtained using a susceptance model for SVC. A PSCAD/EMTDC-based detailed simulation demonstrated that the DP-model offers good-enough accuracy with much less computational effort. © 2015 IEEE.
  • No Thumbnail Available
    Item
    A toy model to understand subsynchronous resonance and real-time simulation of the model using RTAI-Linux
    (Institute of Electrical and Electronics Engineers Inc., 2016) Kotian, S.M.; Latha, A.H.; Shubhanga, K.N.
    This paper presents a toy- model to demonstrate the concepts of torsional interactions that occur during the subsynchronous resonance (SSR) problem in power systems.The content of the paper evolves as a tutorial and motivates a novice to take up SSR studies on relatively complex systems such as the IEEE first and second benchmark systems which contain many intricate modal interactions. To show the utility of the model and to impart a realistic touch in the lab environment the complete system is simulated in real-time using real-time application interface (RTAI)-enabled Linux platform. Using a peripheral component interconnect (PCI) card, the real-time simulation results are captured on an oscilloscope and are validated using off-line MATLAB simulations. © 2015 IEEE.