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 EPE  Vol.5 No.4 B , July 2013
DC System Modeling and AC/DC System Harmonic Calculation under Asymmetric Faults
Abstract: The accurate DC system model is the key to fault analysis and harmonic calculation of AC/DC system. In this paper, a frequency domain analysis model of DC system is established, and based on it a unified fundamental frequency and harmonic iterative calculation method is proposed. The DC system model is derived considering the dynamic switching characteristic of converter and the steady-state response features of dc control system synchronously. And the proposed harmonic calculation method fully considers the AC/DC harmonic interaction and fault interaction under AC asymmetric fault condition. The method is used to the harmonic analysis and calculation of CIGRE HVDC system. Compared with those obtained by simulation using PSCAD/EMTDC software, the results show that the proposed model and method are accurate and effective, and provides the analysis basis of harmonic suppression, filter configuration and protection analysis in AC/DC system.
Cite this paper: H. Li, J. Liu, F. Wang and G. Wang, "DC System Modeling and AC/DC System Harmonic Calculation under Asymmetric Faults," Energy and Power Engineering, Vol. 5 No. 4, 2013, pp. 1202-1208. doi: 10.4236/epe.2013.54B228.
References

[1]   Y.B. Shu, “Present Status and Prospect of HVDC Transmission in China,” High Voltage Engineering, Vol. 30, No. 11, 2004, pp.1–2.

[2]   Q. Y. Yuan, “Present Status and Prospect of Ultre-HVDC Transmission in China,” Power System Technology, Vol. 29, No. 14, 2005, pp.1-3.

[3]   H. T. Su, Q. Xu, Y. Wu, “Study on Market Demand of UHVDC Power Transmission in China,” Power System Technology, Vol. 29, No. 2, 2005, pp.1-4.

[4]   Y. Zeng, Z. Ren, T. Yu, “Study on Multi-Harmonic Sources in AC/DC Hybrid Transmission System Based on Modulation and Iterative Harmonic Analysis Method,” Power System Technology, Vol. 30, No. 11, 2006, pp.27-31.

[5]   Q. Q. Ru, L. W. Jiao, Y. Zheng, Y. X. Ni, S. S. Chen, F. l. Wu, “Modeling and Simulation of HVDC with Dynamic Phasor,”Proceedings of the CSEE, Vol. 23, No. 12, 2003, pp.28-32.

[6]   L. H. Hu, R. E. Morrison. “The Use of Modulation Theory to Calculate the Harmonic Distortion in HVDC Systems Operating on An Unbalanced Supply,” IEEE Transactions On Power Electronics, Vol. 12, No. 2,1997, pp.973-980. doi:10.1109/59.589796

[7]   A. R. Wood, J. Arrillaga, “HVDC Convertor Waveform Distortion: A Frequency-domain Analysis,” IEEE Proceedings Generations Transmissions Distibution, Vol. 1, No. 142, 1995, pp. 88-96.

[8]   Y. L. Ma, X. N. Xiao, X. Jiang, “Analysis of the Impact of AC System Single-Phase Earth Fault on HVDC,” Proceedings of the CSEE, Vol. 62, No. 11, 2006, pp.144-149.

[9]   G. Wang, Z. K. Li, H. F. Li, “Dynamic Phasor Model of the Converter of the AC/DC System,” Proceedings of the CSEE,2010, Vol. 30, No. 1, 2010, pp.59-64.

[10]   H. F. Li, P. Zhang, G. Wang, G. L. Zhu, “Performance of Directional Protection Based on Variation of Power-frequency Components in HVDC/AC Interconnected System Part One DC-system Equivalent Impedance of Power-frequency Component Variation,” Automation of Electric Power Systems, Vol. 33, No. 9, 2009, pp.41-46.

[11]   Z. K. Li, G. Wang, H. F. Li, “An Analysis and Calculation Method of Harmonic Interaction between AC and DC System under Asymmetric Operating Conditions,” Automation of Electric Power Systems, 2010, Vol. 34, No. 6, 2010, pp. 42-47.

 
 
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