摘要电压跌落检测是动态电压恢复器(Dynamic Voltage Restorer)控制系统的一个关键环节,要求具有较高的实时性和准确性。介绍了一种新型的动态电压恢复器电压跌落检测算法,并对该检测算法数学原理进行了分析和研究,从微分环节的频率特性入手解决了检测速度和抗干扰性之间的矛盾。仿真结果证明了该检测算法的快速性及准确性。
1Bollen M H J. Understanding power quality problems, voltage sags and interruptions[M]. IEEE Press, 2000.
2Chan K, Kara A. Voltage sags mitigation with an integrated gate commutated thyristor Based dynamic voltage restorer[A]. In: IEEE 8th International Conference on Harmonics and Quality of Power(ICHQP)[C]. Piscataway (NJ) : IEEE, 1998,1 : 561-565.
3Chan K,Kara A. Dynamic voltage restorer and its performance[J]. International Electric Power for China, 1998(1) :49-51.
4Song H S, Nam K. Instantaneous phase-angle estimation algorithm under unbalanced voltage-sag conditions [J]. IEEE Proceedings Generation Transmission and Distribution, 2000,147 (6) : 409-415.
5Parsons Antony C, Mack W Grady, Edward J. Powers. A wavelet-based procedure for automatically determining the beginning and end of transmission system voltage sags[A]. In: IEEE Proceedings of PES Winter Meeting [C]. New York, USA, 1999,2:1310-1315.
6Changjiang Zhan, Fitzer C, Ramaehandaramurthy V K, et al. Software phase-locked loop applied to dynamic voltage restorer[A]. In: IEEE Proceedings of PES Winter Meeting[C]. Columbus, USA, 2001,2 : 1033- 1038.
