### Stefano Di Maio (@dimaios)

Automatic control specialist

## Re: 50Hz and harmonics filtering

Hi Fred,             thanks for your reply.The approch is good but the problem f the sawtooth wave step response.As explained before I've realized the...

## Re: 50Hz and harmonics filtering

Hi Rick,         that was one of the first attempts, unfortunately I've to filter both odd and even multiple of the fondamental.   Best regards

## Re: 50Hz and harmonics filtering

As explained before the signal s(t) to be analyzed is a random process with spectrum support within [0..1 kHz]. Grid harmonics are summed to this signal up to the...

## Re: 50Hz and harmonics filtering

"I am a firm believer that the easiest signal processing is the signal processing that you don't have to do!"Let's put that one in a frame ! :)

## Re: 50Hz and harmonics filtering

I try to answer to your questions:Does the desired AC signal consist of single or multiple frequencies? The signal s(t) to be analyzed is a random process with...

## Re: 50Hz and harmonics filtering

The best algorithm for achieving what you want (of which I am aware) is called the "shielded cable algorithm." :)Cables in the plant are shielded. :)At first......

## Re: 50Hz and harmonics filtering

Is the 50 Hz a power main signal?  Yes, but consider that frequency is not fixed but time variable. Alarm condition are signaled outside limits [49.9 - 50.1] Hz....

## Re: 50Hz and harmonics filtering

The sampling rate is about 3kHz and we are trying to attenuate both odd and even harmonics.The harmonics can extend a lot into the spectrum ( up to 700-800 Hz ).The...

## 50Hz and harmonics filtering

I'm facing a problem trying to filter 50Hz and harmonics from a signal s(t).I've implemented several techniques like Kalman filtering, optimized FIR and IIR filters...