Well researched and documented real-industry live case studies covering a wide rage of Industries and PQ issues from Asia on harmonic distortions, under-voltage and over-voltage, voltage dips, sags, flicker/sag/swell, transients, earthing, reactive compensation and so on , are available here for downloading. The case studies offer detailed analysis of the PQ issues ad solutions including economic analysis to enable users and top managements to readily go in for implementable economical solutions.
Large continuous process plants are increasingly resorting to use of non linear loads (NLL) such as DC drives, variable speed AC drives, UPS, increased electronic controls etc. to improve performance and productivity of their plants. The plant engineers are increasingly facing unfamiliar problems related to power quality (PQ) mainly problem of distortion of fundamental wave shape and associated effects.
Power quality is of major concern to most of the industries, especially those operating with critical electronic controller oriented machinery and equipments. Poor quality of power leads to major problems like unexplained breakdowns, production interruptions, excess energy consumption etc.
Large corporates before setting a new plant in an industrial locality would like to be sure of power quality of the electricity supplied by the utility. Especially when the supply is at extra high voltage level of 230 kV, which is availed by a few consumers of huge power requirement, it would be prudent to check incoming power quality of an existing consumer in the vicinity.
Electrical systems in high rising office building play an important role in day to day to functionality because of application of various electrical utilities like lighting, air conditioning, water pumping, office equipment (computers, printers, faxes, and xerox machines), lifts etc.
While Indian garment business is generally regarded as one of the countries benefited due to phasing out of quotas, there will be winning and loosing enterprises. This transformation might have negative impact, especially if the trend towards pure economies of scale and mass production prevails.
This Power Quality survey was conducted in a leading textile mill at south India manufacturing various counts of yarns. The industry had added number of variable frequency drives for enhancing efficiency and also to have better process control.
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