Title :
Voltage sag effects on energy-optimal controlled induction motor with time-varying loads
Author :
Kumar, Narendra ; Chelliah, Thanga Raj ; Srivastava, S.P.
Author_Institution :
Water Resources Dev. & Manage. Dept., Indian Inst. of Technol., Roorkee, Roorkee, India
Abstract :
In this paper, the impact of most severe symmetrical voltage sag (type A) on an energy-optimal controlled induction motor (IM) is analyzed with time-varying load (TVL). The simulation results are provided to describe the dynamic performances (speed and torque profile) of the motor under voltage sag. The results are compared with IM connected to 3-phase supply directly i.e without energy-optimal control (vector control). Model Based Control (MBC) is used to implement the said control. The effect of voltage sag in the operation of MBC is analyzed. To enhance ride through capability of IM and mitigate the effect of voltage sag, this paper investigates two techniques: (i) The Buck-Boost Converter, provides the desired DC link voltage (ii) Dynamic Voltage Restorer (DVR), provides the three phase voltage injection during voltage sag.
Keywords :
induction motors; machine vector control; optimal control; power control; power convertors; power supply quality; 3-phase supply; DC link voltage; DVR; IM ride through capability; TVL; buck-boost converter; dynamic voltage restorer; energy-optimal controlled induction motor; model-based control; motor dynamic performance; phase voltage injection; speed profile; symmetrical voltage sag; time-varying load; time-varying loads; torque profile; vector control; voltage sag effect mitigation; Induction motors; Power quality; Simulation; Torque; Vectors; Voltage control; Voltage fluctuations; boost converter; dynamic voltage restorer; model based control; time-varying load; voltage sag;
Conference_Titel :
Power Electronics, Drives and Energy Systems (PEDES), 2012 IEEE International Conference on
Conference_Location :
Bengaluru
Print_ISBN :
978-1-4673-4506-4
DOI :
10.1109/PEDES.2012.6484446
