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Harmonic Analysis

The increasingly widespread application of SCR-controlled drives in industrial processes has brought harmonic consideration into the design of electrical systems. It is common practice for industrial plants with major harmonic sources to add harmonic filters to limit voltage distortion and harmonic current flows into the utility system. On existing systems, harmonic measurements are usually made to determine the extent of voltage and current distortion and are used as a base for further calculations. If calculations show that harmonic filters are required to meet specified criteria, filters can be designed and analytically tested.

Harmonic filters must be integrated with power factor correction capacitors and must withstand any harmonics absorbed from a utility system or neighboring plant. Filters must also continue to function when loads in the plant vary or major elements such as transformers are taken out of service for maintenance. With careful planning, filters can be designed to reliably serve their intended purpose without creating new problems.

EasyPower’s harmonic analysis will reveal:

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