Here we are presenting the notes of POWER QUALITY for the students of Electrical Engineering / Electrical & Electronics Engineering Department. This subject is an Departmental elective and deals in the quality of power on various basis. These notes are a collection of study materials from various sources and just for the preparation of the students of these branches in engineering. These notes are arranged and managed by Mr. Deepak Pandey.

Terms and definitions of transients, Long Duration Voltage Variations: under Voltage, Under Voltage and Sustained Interruptions; Short Duration Voltage Variations: interruption, Sag, Swell; Voltage Imbalance; Notching D C offset; waveform distortion; voltage fluctuation; power frequency variations.