Frequency domain model of an HVDC link with a line-commutated current-source converter. Part I: fixed overlap

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Frequency domain model of an HVDC link with a line-commutated current-source converter. Part I: fixed overlap

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This study presents a frequency-domain model of an high voltage direct current (HVDC) transmission link with a line-commutated current-source converter. Using space-vector transfer functions between superimposed oscillations in the control signal and the AC and DC sides, expressions for voltages and currents have been derived. The dynamic properties of the HVDC link, taking the characteristics of the networks on both the AC and the DC sides into consideration, can be studied by applying classical Bode/Nyquist/Nichols control methods. The resulting model was validated by time-domain studies in PSCAD/EMTDC. The model is described in two papers. In this paper (Part I), it has been assumed that the overlap angle during commutation remains constant. It is shown in the validation that this assumption introduces resonances that cause severe errors at certain network conditions. In the second paper (Part II), the model is extended so as to cope with the varying overlap angle in order to bring the frequency-domain model into agreement with the results obtained from time-domain simulations.

Inspec keywords: power system CAD; constant current sources; frequency-domain analysis; time-domain analysis; HVDC power transmission

Other keywords: fixed overlap; line-commutated current-source converter; space vector transfer functions; frequency domain model; Bode/Nyquist/Nichols control; superimposed oscillations; time domain simulations; PSCAD/EMTDC; HVDC transmission link

Subjects: d.c. transmission; Power convertors and power supplies to apparatus; Mathematical analysis; Power engineering computing; Mathematical analysis

References

    1. 1)
      • J. O'Reilly , A.R. Wood , C.M. Osauskas . Frequency domain based control design for an HVDC converter connected to a weak AC network. IEEE Trans. Power Deliv. , 3 , 1028 - 1033
    2. 2)
      • A.R. Wood , J. Arrillaga . Composite resonance; a circuit approach to the waveform distortion dynamics of an HVDC converter. IEEE Trans. Power Deliv. , 4 , 1882 - 1888
    3. 3)
      • P.F. de Toledo , L. Ängquit , H.-P. Nee . Frequency domain model of a HVDC link with line-commutated current source converter for small signal analysis – Part II: Varying overlap. IET Gener. Transm. Distrib. , 8 , 771 - 782
    4. 4)
      • X. Yang , C. Chen . HVDC Dynamic modeling for small signal analysis. IEE Proc. Gener. Transm. Distrib. , 6 , 740 - 746
    5. 5)
      • V.P. Erik . Calculation of transfer functions in grid-controlled converter systems, with special reference to HVDC transmissions. PROC. IEE , 5 , 989 - 997
    6. 6)
      • C. Osauskas , A. Wood . Small-signal dynamic modeling of HVDC systems. IEEE Trans. Power Deliv. , 1 , 220 - 225
    7. 7)
      • Wood, A.R., Osauskas, C.M., Hume, D.J.: `Small signal modeling of HVDC transmission systems', AC–DC Power Transmission, 28–30 November 2001, Conference Publication No. 485.
    8. 8)
      • C.M. Osauskas , D.J. Hume , A.R. Wood . Small signal frequency domain model of an HVDC converter. IEE Proc. Gener. Transm. Distrib. , 6 , 573 - 578
    9. 9)
      • D. Jovcic . Nalin Pahalawaththa and Mohamed Zavahir, ‘Analytical modeling of HVDC-HVAC systems. IEEE Trans. Power Deliv. , 2 , 506 - 511
    10. 10)
      • Jalali, S.G.: `Dynamic response of a thyristor controlled switched capacitor', Paper 94-WM-065-3 PWRD, IEEE PES, 1994.1, New York.
    11. 11)
      • de Toledo, P.F.: `Modeling and control of a line-commutated HVDC transmission system interacting with a VSC STATCOM', 2007, , Doctoral thesis in eElectrical Systems, Stockholm, Sweden.
    12. 12)
      • K.K. Pál . Transient Phenomena in electrical machines.
    13. 13)
      • D. Jovcic . Nalin Pahalawaththa and Mohamed Zavahir, ‘Small signal analysis of HVDC-HVAC interactions. IEEE Trans. Power Deliv. , 2 , 525 - 530
    14. 14)
      • S. Todd , A.R. Wood , P.S. Bodger . An s-domain model of an HVDC converter. IEEE Trans. Power Deliv. , 4 , 1723 - 1729
    15. 15)
    16. 16)
      • D.J. Hume , A.R. Wood , C.M. Osauskas . Frequency-domain modeling of inter-harmonics in HVDC systems. IEE Proc. Gener. Transm. Distrib. , 1 , 41 - 48
    17. 17)
      • A.R. Wood , J. Arrillaga . The frequency dependent impedance of an HVDC converter. IEEE Trans. Power Deliv. , 3 , 1635 - 1641
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