Question

A factory has a sub-circuit found to have serious 3rd harmonic in the current, together with other harmonic orders (from 3rd up to 15th order).

(a) What are the advantages and limitations of adopting tuned LC filters for mitigating current harmonic distortions

Answer 1

Tuned LC filters provide effective and selective filtering for mitigating current harmonic distortions, but they can be costly and have limited bandwidth.

Step-by-step explanation:

The advantages of adopting tuned LC filters for mitigating current harmonic distortions in a factory sub-circuit include:

1. Effective Filtering: The tuned LC filters can effectively reduce the amplitude of specific harmonic frequencies, including the 3rd harmonic. This helps in reducing harmonic distortions in the current.
2. Selective Filtering: LC filters can be tuned to specific harmonic frequencies, allowing them to target and mitigate specific harmonic orders. This selective filtering helps in reducing distortions without affecting the fundamental frequency.

The limitations of adopting tuned LC filters include:

1. Cost and Complexity: Building and tuning LC filters can be expensive and requires technical expertise.
2. Limited Bandwidth: Tuned LC filters can only mitigate specific harmonic frequencies and may not be effective for a wide range of harmonics or changing load conditions.