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.
In this case study a world leader in a non-ferrous metal industry engaged in manufacturing of ACSR conductors for HT & EHV electrical power transmission & distributions had been facing high incidence of operational problems across its plants A & B, due to Power Quality (PQ) issues arising out of Harmonic Distortions.
A call center in a metro city was faced with problems of unreliable operation due to higher degree of harmonic amplification with the existing APFC Capacitors, which caused its frequent failures. The standard, unchoked capacitors in the APFC System offered very low impedance to harmonic currents thus acting as sink for higher frequency components.
A leading tyre manufacturing company in India was facing PQ problems due to lower factor of the system due to non-linear loads present in the system. A leading tyre manufacturing company in India was facing problems due to lower power factor of the system due to non-linear loads present in the system.
An Indian health center located in a metro city was faced with problems of high kVA demand (beyond the contracted demand with the utility), low power factor, etc., resulting in high energy bills. After a detailed study and analysis of the key parameters, a solution of ‘Real time power factor correction’ (RTPFC) was recommended and implemented.
The DC drives with six-pulse rectifier, generate significant 5th and 7th harmonics and appear as a stress and skin effect on cable leading to insulation failure. A generally accepted method of coping with these problems is to de-rate all the electrical component even by 50%.
A sophisticated, state-of-the-art data center calls for a highly secured physical environment in addition to reliable power supply/uninterrupted signal transmission. There has to be round-the-clock restricted access with alarms, emergency system and intrusion prevention at area of both power & data handling.
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