Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/JEET.2011.6.5.658
Title & Authors
Novel Fast Peak Detector for Single- or Three-phase Unsymmetrical Voltage Sags Lee, Sang-Hoey; Cha, Han-Ju;
In the present paper, a novel fast peak detector for single- or three-phase unsymmetrical voltage sags is proposed. The proposed detector is modified from a single-phase digital phase-locked loop based on a d-q transformation using an all-pass filter (APF). APF generates a virtual phase with phase delay. However, this virtual phase cannot reflect a sudden change of the grid voltage in the moment of voltage sag, which causes a peak value to be significantly distorted and to settle down slowly. Specifically, the settling time of the peak value is too long when voltage sag occurs around a zero crossing, such as phase and . This paper describes the operating principle of the APF problem and proposes a modified all-pass filter (MAPF) to mitigate the inherent APF problem. In addition, a new fast peak detector using MAPF is proposed. The proposed detector is able to calculate a peak value within 0.5 ms, even when voltage sag occurs around zero crossing. The proposed fast peak detector is compared with the conventional detector using APF. Results show that the proposed detector has faster detection time in the whole phase range. Furthermore, the proposed fast peak detector can be effectively applied to unsymmetrical three-phase voltage sags. Simulation and experimental results verify the advantages of the proposed detector and MAPF.
Fast peak detector;All-pass filter;Modified all-pass filter;
A Novel Hybrid Sequential Start Control System for Large Inductive Loads, Journal of Electrical Engineering and Technology, 2015, 10, 1, 388
Fast Detection Algorithm for Voltage Sags and Swells Based on Delta Square Operation for a Single-Phase Inverter System, Journal of Electrical Engineering and Technology, 2016, 11, 1, 157
Cost-Effective APF/UPS System with Seamless Mode Transfer, Journal of Electrical Engineering and Technology, 2015, 10, 1, 195
R. Naidoo, P. Pillay," A New Method of Voltage Sag and Swell Detection", IEEE Transactions on power delivery, vol. 22, NO. 2, APRIL 2007, pp 1056-1063.
M. Gonzalez, V.Cardenas, R. Alvarez, "A Fast Detection Algorithm for Sags, Swells, and Interruptions Based on Digital RMS Calculation and Kalman Filtering", in Proc. Int. Power Electronics Congress 2006, 16-18 Oct. 2006, pp1 - 6
P. Wang, N. Jenkins, and M. H. J. Bollen, "Experimental investigation of voltage sag mitigation by an advanced static VAR compensator," IEEE Trans. Power Del., vol. 13, no. 4, pp. 1461-1467, Oct. 1998.
J. C. Gomez and G. N. Campetelli, "Voltage sag mitigation by current limiting fuses," in Proc. Industry Applications Conf., 2000, pp. 3202-3207.
X. Xiangning, X. Yonghai, and L. Lianguang, "Simulation and analysis of voltage sag mitigation using active series voltage injection," in Proc. Int. Conf. Power System Technology, 2000, pp. 1317- 1322.
N. S. Tunaboylu, E. R. Collins, Jr., and P. R. Chaney, "Voltage disturbance evaluation using the missing voltage technique," in Proc. 8th Int. Conf. Harmonics and Quality of Power, 1998, pp. 577-582.
A. C. Parsons, W. M. Grady, and E. J. Powers, "A wavelet based procedure for automatically determining the beginning and end of transmission system voltage sags" ,Power Engineering Society Winter meeting,Vol. 2, 1999, pp. 1310-1315.
Fitzer C., Barnes M., Green P., "Voltage sag detection technique for a dynamic voltage restorer", IEEE Transactions on Industry Applications,Vol. 40, NO 1, Jan-Feb 2004, pp. 203-212.
S. Lee., H. Cha, B. Han, "A new single-phase voltage sag/swell compensator using direct power conversion", in Proc. Energy Conversion Congress and Exposition, 2009. 20-24 Sept. 2009, pp 2704- 2710
B. Bae, J. Jeong, J. Lee, B. Han, "Novel Sag Detection Method for Line-Interactive Dynamic Voltage Restorer",IEEE Transactions on power delivery, vol. 25, NO. 2, APRIL 2010, pp 1210-1211.
J. Jeong, Ji. Lee, B. Han "Three-Phase Line- Interactive Dynamic Voltage Restorer with a New Sag Detection Algorithm", Journal of Power Electronics, vol. 10, no. 2, 2010, pp.210-217.
N. Tuaboylu, E. Collins, P. Chaney, "Voltage Disturbance Evaluation Using the Missing Voltage Technique", Harmonics And Quality of Power, vol.1, 1998, pp. 577-582
J. Kwon, K. Nam, B. Kwon, "Photovoltaic Power Conditioning System With Line Connection", IEEE Transactions On Industrial Electronics, vol. 53, no. 4, August 2006, pp. 1048-1054.
S. Lee, T. An, H. Cha" Mitigation of Low Frequency AC Ripple in Single-Phase Photovoltaic Power Conditioning Systems", Journal of Power Electronics, vol. 10, no. 3, pp.328-333, 2010