5 Ways In Which Harmonics Impact Capacitor Banks

Harmonic distortion is a significant issue for many power systems, as it adversely affects the overall efficiency of the system. For this, numerous tools are employed, such as active harmonic filters, power capacitor banks, and more. The latter in particular is a popular choice in improving the stability of the power system and storing energy. However, harmonic distortion can adversely impact capacitor banks. This blog outlines five ways in which it negatively affects capacitors, thereby necessitating the use of harmonic filters for harmonic mitigation.

How Do Harmonics Impact Capacitor Banks?

1. Overcurrent And Overload

The first challenge faced by capacitor banks concerning harmonics is overcurrent and overloading. Harmonic distortion increases the amount of current and voltage at the capacitor terminals. The result is that the current in the capacitor surpasses its rated capacity, leading to its overheating.

2. Increased Power Losses And Rise In Temperature

As mentioned above, harmonics cause a surge of current and voltage. Consequently, the capacitor is overheated. This directly translates to more power loss in the form of heat. Moreover, the excessive heat will also compromise the insulation of the capacitor, thereby shortening its lifespan. The damage to insulation also leads to an increase in partial discharge, which further damages the capacitor internally.

3. Burned Out Terminals

The capacitor terminals are most affected due to harmonic current amplification. This can lead to the terminals getting completely burned out in the long term. This is why the use of active harmonic filters is vital to offset the ill effects of harmonic distortion.

4. Increased Mechanical Stress

Harmonics can also increase the vibrations within the capacitor, especially the internal plates. This form of mechanical resonance can also damage the capacitor internally, much like the partial discharge.

5. Deterioration Of Power Grid Quality

If the compromised capacitor banks are connected to a power grid with increased harmonics, then it will result in deterioration of the power quality of the entire grid. Therefore, active harmonic filters are necessary to maintain the quality and reliability of the power grid.

ADM Engineering Inc. is a proud distributor of harmonic filters. We offer active harmonic filters for dynamic applications, passive harmonic filters for more static tasks, and hybrid harmonic filters that combine the features of both active and passive filters when it comes to harmonic mitigation. To learn more about specifications and other technical details of our products, contact us at 877-236-8337 today.