Product - POWER QUALITY ANALYSIS AND HARMONIC MITIGATION SOLUTION
It is to foresee or predict the quality of power that is being maintained at customer site and the Harmonics level managed. It is strange to note that we are really neither aware that we should have Quality Power nor much care to utilize it healthily. This study emphasize as many of the dangers and problems that would arise due to poor quality & Harmonics.
TNEB has mandated to limit harmonic distortion starting from the year 2012, which in turn is based on CEA-2007 regulation, devised to improve quality of power supply as well as to stabilize & prevent it from a sudden collapse by re- living it together with connected generating stations from the cascading effects of a possible built up of a stressful power system conditions. It is difficult to deconstruct the root cause of a grid collapse. And even after a decade no convincing reason has emerged from the American grid collapse. It is however certain that grid collapse when multiple reasons swell up cascading one after another and reach the threshold trigger point.
Power quality harmonic mitigation Solutionis one of the major constituents that define a stable grid. Power surge viz. voltage sag, which is also a consequence of power quality harmonic; is the single major cause that inflicts billions of dollars damages in terms of industrial equipment failures and productivity losses every year worldwide. Further electrical harmonics are unpredictable and under favorable power systems impedance, trigger harmonic resonance that magnifies harmonics as well as power fluctuations in the grid supply.
HARMONIC LIMITS IN ELECTRIC POWER SYSTEMS (IEEE 519 1992)
The harmonic voltage limitations set forth by IEEE 519 1992 are:
1) Maximum Individual Frequency Voltage Harmonic: 3%
2) Total Harmonic Distortion of the Voltage: 5%
Harmonic limitations have been established by IEEE 519 1992 for the following reasons:
o To limit the damage to power factor correction capacitors and harmonic filter systems caused by excessive har- monics
o To prevent series or parallel resonance in the electrical system
o To keep the level of harmonics at the PCC (Point of Common Coupling) from being excessive and distorting the system voltage and damaging other equipment on the system
o The PCC is defined as the electrical connecting point or interface between the utility distribution system and the customers electrical distribution system.
Power quality can be defined as the comparison of voltage and current wave forms to their fundamental clean sinusoidal wave