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Participant

Join Date: Feb 2008
Location: Mumbai(India)
Posts: 2

Single-Phase PLL

03/25/2010 5:39 AM

Dear All,

Can anybody suggest better way to generate PLL (phase locked loop) for single phase voltage source.

I have PLL for 3 phase.i.e by converting three phase to 2 phase etc..

But for single phase can any body shae some idea on how to impelemt PLL for single phase grid connected inverter.

Rgds

Mukesh

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Guru

Join Date: Jun 2009
Location: South of Minot North Dakota
Posts: 8376
Good Answers: 775
#1

Re: Single Phase PLL

03/25/2010 10:54 AM

Are you trying to make a homemade Grid Tie Inverter system?

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Guru
Canada - Member - Specialized in power electronics

Join Date: Feb 2008
Location: Montreal, Canada.
Posts: 1372
Good Answers: 80
#2

Re: Single-Phase PLL

03/26/2010 10:38 AM

It always depends on the response time and precision you are looking for.

If slow is OK, you can filter the AC and use a zero crossing with very little hysteresis to generate a nice square wave used for the phase comparator. Of course, the following filter will be very slow as it will only get valid phase info twice per cycle. It will have some phase jitter.

Good luck

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Experienced is earned, common sense is taught, both are rare essentials of life.
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Anonymous Poster
#3

Re: Single-Phase PLL

03/26/2010 11:08 AM

Actually am working on single phase active filter and to provide syncrhonisation with grid i need single pha PLL efficent mehtod.

I want to write this PLL in my software only...

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