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To calculate % THD in lab view vi

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rashmi venugopal

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fundamental, pure sine wave= 50hz

2) harmonics injected= 100 hz ( ie, 1st harmonic) ( harmonics is the integral multiple of fundamental wave)

then we add both pure and harmonic , to get combination = distortion ( shown in gragh as combination)

then we pass through filter, and reproduce pure sine wave.

now here,, next step is to find out how much % of harmonic has to be injected to get the distortion,

ie.., 1% of 100hz= does not make any change

10% 100hz = some changes
30% of 100hz = some more changes in distortion
40% of 100 hz = more changes

here now to design to specify these % of harmonic injection????????
like supose we want to send only 10 % of 100hz harmonic frequency,

link-- for the design vi "
LabViewDesignOnToMeasureTHD
 

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