Title :
Operation of a phase locked loop system under distorted utility conditions
Author :
Kaura, Vikram ; Blasko, Vladimir
Author_Institution :
Rockwell Autom., Allen-Bradley Co., Mequon, WI, USA
Abstract :
Operation of a phase locked loop (PLL) system under distorted utility conditions is presented. A control model of the PLL system is developed and recommendations are made on tuning of this model specially for operation under common utility distortions such as line notching, voltage unbalance/loss, and frequency variations. The PLL is completely implemented in software without any filters. All analytical results are experimentally verified
Keywords :
electrical faults; electricity supply industry; harmonic distortion; phase control; phase locked loops; power system control; power system harmonics; synchronisation; PLL model tuning; PLL system; distorted utility conditions; frequency variations; line notching; phase angle; phase locked loop system operation; software implementation; utility distortions; utility harmonics; utility interface; utility synchronisation; voltage loss; voltage unbalance; Communication system control; Control systems; Electric variables control; Feedback; Frequency synchronization; Phase distortion; Phase locked loops; Power industry; Regulators; Voltage control;
Journal_Title :
Industry Applications, IEEE Transactions on
