A Novel SPLL and Voltage Sag Detection Based on LES Filters and Improved Instantaneous Symmetrical Components Method

• Published in: IEEE transactions on power electronics Vol. 30; no. 3; pp. 1177 - 1188
• Main Authors: Chen, Guodong, Zhang, Liang, Wang, Ruiting, Zhang, Luhua, Cai, Xu
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.03.2015; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Computer programs; Computer simulation; Dynamic response; Educational institutions; Electric potential; Electrical equipment; Electronics; Filtering algorithms; Harmonic analysis; Heuristic algorithms; Matlab; Performance evaluation; Power harmonic filters; Power system dynamics; Prototypes; Sag; Simulation; Software; Voltage; Voltage fluctuations; symmetrical components; voltage sag detection; Cascaded H-bridge; dynamic response; least error squares (LES) filter
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2014.2318051

The software phase-locked loop and the voltage sag detection algorithm are the two key factors to evaluate the performance of a dynamic voltage restorer, whose dynamic response is usually impacted by phase jump, voltage unbalance, and harmonics of the grid voltage. This paper proposes a novel algorithm based on the combination of least error squares filters and an improved instantaneous symmetrical components method. Hence, a detailed theoretical procedure is first presented. Then, the simulation model is built in MATLAB/SINMULINK. To verify its effectiveness, a series of comparison and analysis have been carried out. Also, a 10-kV/2-MVA prototype is developed with a voltage sag generator platform. Finally, experiments have been done and the results show that the novel algorithm has an improved dynamic response compared with the traditional methods.