Cont'd WHAT ARE HARMONICS?

Cont'd Methods of Harmonic Mitigation

Phase Staggering

• Phase staggering is simply the phase shifting of individual loads such that the harmonics produced by one or more loads cancels the harmonics produced by others.
• For phase staggering to be successful at least two balanced loads of similar ratings are required.
  

Active Filters

AIM (active injection mode) Filter

• AIM filters are the most technically advanced and effective solution in reducing the total harmonic current distortion to below 5%, in line with IEEE 519-1992 or UK Engineering Recommendation G5/4 harmonics standards.
• The AIM filter continuously monitors the harmonic current demanded by the load and generates an adaptive waveform which matches exactly the shape of the non linear portion of the load current.
• AIM injects this adaptive current into the load at the point of connection. Only fundamental (50Hz) current is drawn from the source by the load.
• AIM compensates from 2nd to 51st harmonic. Response time ~ 100 micro-seconds, especially suitable for dynamic loads.