Performance Analysis for the Modified Excitation System of Synchronous Machine Connected to HVDC System

  • 발행 : 2002.03.01

초록

This paper analysis the transient performance of the modified excitation system using 4-quadrant chopper for a synchronous machine connected to HVDC system. Conventionally, capacitors are used to supply reactive power requirement at a strong converter bus. And the installation of a synchronous machine is essential in an isolated weak network to re-start after a shutdown of HVDC and to increase the system strength. However, a conventional static excitation system has some problems which are harmonic instability and the system stress due to overvoltage. To reduce these problems, the new excitation system, which has 4-quadrant chopper, is proposed. As the proposed system provides the capability to allow reverse current and isolate between AC network and excitation power, problems of overvoltage and harmonic instability can be solved. The investigation is performed and confirmed by the time domain digital simulation using PSCAD/EMTDC program.

키워드

참고문헌

  1. V. Crastan, 'Investigation of Self-excitation of Synchronous Machines', The Brown Boveri Review, Vol. 49, No. 3/4, pp. 80-94, 1962
  2. F.P.de Mello, A.C.Dolbec, and D.A.Swann, 'Analog Computer Studies of System Overvoltages Following Load Rejections', IEEE Transactions on Power Apparatus and Systems, pt. III, PAS, pp. 42-49, April 1963
  3. F.P.de Mello, L.M.Leuzinger, and RJ.Mills, 'Load Rejection Overvoltages as Affected by Excitation System Control', IEEE Transactions on Power Apparatus and System, vol. PAS -94, No. 2, pp. 280-287, March/April 1975
  4. S.Nishida, H.Suzuki, and S.Takeda, 'Analysis of Overvoltage Caused by A Self-excitation in A Separated Power System With Heavy Load and Large Shunt Capacitance', IEEE Transactions on Power Apparatus and Systems, vol. PAS -102, pp. 1970-1978, July 1983
  5. A.M.Gole, R.W.Menzies, J.Chand and R.W.Haywood, 'Capacitive Load Induced Field Stresses on Generators Connected into DC Systems', IEEE Transactions on Power Apparatus and Systems, vol. PAS - 105, No.3, pp.543-549, March 1985
  6. A.M.Gole, 'Exciter Stresses In Capacitively Loaded Synchronous Generators', Ph.D. Thesis, The University of Manitoba, 1982
  7. Yi Hu, P.G.McLaren, A.M.Gole, D.J.Fedirchuk and A.Castro, 'Misoperation of Hydro Generator Protections Under HYDC Load Rejection', Proceedings of International Conference on The Development of Protection and Control Systems, May 1994, Beijing, P.R.China
  8. IEEE Power System Relaying Committee, 'Impact of HV and EHV Transmission on Generator Protection', IEEE Transactions on Power Delivery, Vol. 8, No.3, pp. 962-974, July 1993 https://doi.org/10.1109/61.252624
  9. Nayak, O.B. et al, 'A Totally Graphical User Interface for Electromagnetic Transients Programs' IEEE Computer Applications in Power, Vol 8, No. 1, January 1995