Các anh down giúp em các bài này với:
1. The use of electromagnetic transient programs for voltage sag analysis
http://ieeexplore.ieee.org/xpl/freea...rnumber=759977
2. Effects of voltage sags on household loads
http://ieeexplore.ieee.org/xpl/freea...number=1489404
3. Ride-through issues for DC motor drives during voltage sags
http://ieeexplore.ieee.org/xpl/freea...rnumber=513056
cảm ơn.