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luc4van
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When carrying out a system analysis During design stage (Variable speed drives connected to 3 transformers in parallel) is it a normal practise to check/measure neutral - Earth harmonics, can this be predicted?
Neutral-earth harmonic resonance is a phenomenon that occurs when there is a perfect balance between the voltage and current in an electrical system. This results in a resonance frequency that can cause unwanted vibrations and energy losses.
Neutral-earth harmonic resonance can lead to increased heating and losses in power systems, as well as damage to equipment. It can also cause flickering lights, voltage fluctuations, and harmonic distortion.
Neutral-earth harmonic resonance is caused by a combination of factors, including the presence of nonlinear loads (such as computers and electronic devices), system impedance, and the presence of a neutral-ground connection.
There are several ways to mitigate neutral-earth harmonic resonance, including adding filters or reactors to reduce the harmonic current, adjusting system grounding, and minimizing the use of nonlinear loads.
In addition to causing damage to equipment and power systems, neutral-earth harmonic resonance can also pose a safety hazard to workers and the public. It can result in electric shocks, fires, and other dangerous situations.