Electrical Harmonics Calculator

Electrical Harmonics Calculator

Electrical harmonics calculator is a tool used in electrical engineering to analyze and calculate harmonic frequencies and their effects in electrical systems. 

What is Electrical Harmonics?

The harmonic interference problem in electrical railway systems has received increasing attention with the widespread utilization of power electronic devices in both supply systems and vehicles. The presence of harmonics can cause interference in signal circuits and communication systems as well as lead to stability problems.

Formula:

Electrical harmonics = Primary Frequency × n                

Where,

• (n is integer 1,2,3,4….)

However, a precise determination of harmonic components as required for control purposes is in many practical situations not an easy task. Both the magnitude and phase angle of these harmonic components are usually not constant but time-variant.

Even in steady-state vehicle operation, they vary due to the changing power supply and railway slip-slide conditions. Unlike in common signal processing applications, the line current harmonic components of interest are extremely small compared to other existing time-varying frequency components in the same measured data and result in a very poor signal-noise ratio.

Examples

Example 1:

Determine the Harmonic 1,2 when the primary frequency is 3.

Solution

Example 2:

Determine the electrical harmonics when the primary frequency is 43.

Solution