Normally in every industry they are using VFD & UPS system, LED light, unbalance load & Utilization electronic Instruments, SMPS , Computer, harmonics can generated.Compensation of harmonics, reactive power and load balancing.
Harmonic Filter
Harmonic is defined component of periodic wave whose frequency is integral multiple of the fundamental frequency. Non liner load such as rectifier, inverter, variable speed drive, furnaces create harmonics.