Defining Harmonics
Harmonics are voltage or current waveforms at multiples of the fundamental frequency. They distort the overall waveform, leading to various operational issues.
Sources of Harmonics
Harmonics are typically generated by non-linear loads such as rectifiers, variable speed drives, and fluorescent lighting. These loads draw current in a non-sinusoidal manner, creating harmonic currents that flow back into the power system.
Impact of Harmonics
The presence of harmonics can cause overheating in equipment, interference with communication lines, and malfunctioning of sensitive devices. It also reduces the efficiency of power systems and increases operational costs.
Managing Harmonics
Effective harmonic management involves:
- Harmonic Filters: These devices are used to block or reduce harmonic frequencies.
- Equipment Design: Designing equipment to be less sensitive to harmonics.
- Regular Monitoring: Continuous monitoring helps in identifying and mitigating harmonic issues promptly.