NEW SYNCHRONIZATION METHOD FOR THYRISTOR POWER CONVERTERS TO WEAK AC-SYSTEMS

被引：64
作者：
WEIDENBRUG, R
DAWSON, FP
BONERT, R
机构：
[1] Aachen University of Technology, Institute for Power Electronics and Electrical Drives, Aachen
[2] Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario
来源：
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 1993年 / 40卷 / 05期
关键词：
D O I：
10.1109/41.238019
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper presents an improved approach to obtaining good zero voltage crossing signals. These signals are subsequently used as synchronization signals for a phase controlled thyristor power converter. Detection of accurate zero crossings are possible even under the following conditions: large frequency changes, sudden load changes, and large commutation overlap angles. The improved accuracy in the integrity of the zero crossing is obtained by reconstructing a voltage representing the ac source voltage . This voltage is determined from the distorted thyristor converter input voltage, the converter input current, and an online identification of the source impedance using a microcontroller-based adaptive algorithm. The improvement provided by the new zero crossing detection scheme is verified experimentally.
引用
收藏
页码：505 / 511
页数：7
相关论文
共 16 条
  • [1] Kennell R., Detecting crossover moments of alternating voltages, Power Electronics and Applications, 1, pp. 2.23-2.27, (1985)
  • [2] Rumpf E., Ranade S., Comparison of suitable control systems for HVDC stations connected to weak ac systems, Part I: New Control System, IEEE Trans. Power App. Syst., PAS-91, pp. 549-555, (1979)
  • [3] Dawson F.P., Bonert R., High performance single chip gating circuit for a three-phase controlled bridge, EPE Conf, pp. 1203-1206, (1989)
  • [4] Tso S.K., Ho P.T., Dedicated microprocessor scheme for thyristor phase control of multiphase converters, IEEE Proc., 128, pp. 101-107, (1981)
  • [5] Simard S., Rajagopolan V., Economical equidistant pulse firing scheme for thyristorized DC drives, IEEE Trans. Ind. Electron. and Control Instrum., IECI-22, pp. 425-459, (1975)
  • [6] LeHuy H., Raye D., Perret R., Microprocessor control of a thyristor converter, IEEE J. IECON Proc., pp. 97-102, (1982)
  • [7] Mirbod A., EI-Amawy A., Performance analysis for a novel microprocessor-based controller for a phase-controlled rectifier connected to a weak ac-system, IEEE Trans. Ind. Appl., IA-23, pp. 57-66, (1987)
  • [8] Pfitscher G.H., A microprocessor control scheme for naturally commutated thyristor converter with variable frequency supply, Conf Record IFAC Contr. Power Electron. Electrical Drives, pp. 431-435, (1983)
  • [9] Huy H.L., Feuillet R., Roye D., A digital firing scheme for thyristor converters, IEEE Ind. Appl. Conf. Record, pp. 503-507, (1979)
  • [10] Bourbeau F.J., LSI based three phase thyristor firing circuit, IEEE Trans. Ind. Appl., 19, pp. 571-578, (1989)
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