Analysis of Transient Stability in Synchronous Generator Using Nyquist Method

  • Authors

    • Mohammad Noor Hidayat
    • Syarifatul Izza
    • Ratna Ika Putri
    2018-12-01
    https://doi.org/10.14419/ijet.v7i4.44.26856
  • Transient stability, synchronous generator, nyquist method, power system stability

  • Abstract

    There are two factors that must be considered for the power quality analysis of an electrical power system, i.e. frequency and voltage stability. The system that can return to the initial condition or the steady state after a disturbance occurred indicates that the system is stable. This paper aims to detect the transient stability of three generators, which have identical specification of 2.25 MW 6.6 kV and are operated in parallel, based on the frequency performance. In this paper, the stability analysis is determined by using the nyquist method, where the system stability is indicated by the value of the response curve of the system. The analysis results show that the system of three paralleled generators have the value that far from 1 + j0 and the phase margin value and gain margin tend to be minimum. These values indicate that the system is unstable. The system slowly changes into more unstable because the oscillations are getting bigger until the final state. So, it is necessary to change the parameters of each generator that can affect the system stability during synchronization state.

     

     

     

  • References

    1. [1] Kundur,Praba, “Power System Stability And Controll," Washington Dc, Mc Graw Hill, 1994.

      [2] Jun Zhou, Qiufang Zhang, Huimin Qian, “ s-Domain Generalized Nyquist Criterion For Double Loop Sampled-Data Systems", in 2015 IEEE International Conference on Chinese Automation Congress (CAC), pp. 139-144, 2015.

      [3] K. Ogata, Modern Control Engineering, Prentice Hall, 2001.

      [4] S. Gomes, Guimarães C.H.C, Martins N, Taranto G.N., “Damped Nyquist Plot for a pole placement design of power system stabilizersâ€, Electrical Power Research, pp.158-169, January 2018.

      [5] Rygg Atle, Amin Mohammad, Molinas Marta, “Apparent impedance analysis: A new method for power system stability analysisâ€, in IEEE Journal of Emerging and Selected Topics in Power Electronic, Vol.5, no.4, pp.1474-1486, 2017.

      [6] Busetti Hadrien, Sohail Khan, “Transient Stability In Oscillating Multi-Machine System Using Lyapunov Vectors", in IEEE Transaction On Power System, Vol.33, no.2, pp. 2078-2086, 2018.

      [7] Supegina Fina, “Dasar Sistem Kontrolâ€, in Pusat Pengembangan Bahan Ajar, Universitas Mercu Buana, Vol 12 , 2016.

      [8] B.C. Kuo, Automatic Control Systems, 7th ed., John Willey & Sons, New York, NY, 1995

      [9] Razzaghi Reza, Davarpanah Mahdi, And Majid Sanaye-Pasand, “A Novel Protective Scheme To Protect Small-Scale Synchronous Generators Against Transient Instability", in IEEE Transactions on Industrial Electronics, Vol 60, no.4, pp. 1659-1667, April 2013.

      [10] Qiufang zhang, Jun Zhou’, Xinbau LU, Huimin Qian, â€Stability Analysis Via Contraposition Nyquist Approach For Sampled-Data System With Auxiliary Continuos-Time Feed Back" in IEEE International Conference on The 27th Chinese Control and Decision Conference (CCDC), July 2015.

      [11] Turner Robert, Walton Simon, And Duke Richard, “A Case Study On Aplication Of The Nyquist Stability Criterion As Applied To Interconnected Loads And Sources On Grids" in IEEE Transaction On Industrial Electronics, Vol.60, no.7, pp.2740-2749, July 2013.

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  • How to Cite

    Noor Hidayat, M., Izza, S., & Ika Putri, R. (2018). Analysis of Transient Stability in Synchronous Generator Using Nyquist Method. International Journal of Engineering & Technology, 7(4.44), 22-27. https://doi.org/10.14419/ijet.v7i4.44.26856

    Received date: 2019-01-31

    Accepted date: 2019-01-31

    Published date: 2018-12-01