DC-offset elimination method for grid synchronisation

DC-offset elimination method for grid synchronisation

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
Electronics Letters — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

For three-phase power system, the synchronous reference frame (SRF) phase-locked loop (PLL) is probably the most widely used synchronisation technique under ideal grid condition. However, the presence of dc-offset causes fundamental frequency oscillations errors in estimated phase. To deal with this problem, delay signal cancellation (DSC) operator is utilised in SRF-PLL in recent published literature at the cost of slowing down the dynamic behaviour. The aim is to propose a rapid dc-offset rejection method in three-phase PLL for grid synchronisation. With the employment of modified DSC operator, the dynamic performance of the conventional DSC-based PLL is improved. The effectiveness of the proposed method is confirmed through simulation results.


    1. 1)
    2. 2)
      • 2. Lubura, S., Soja, M., Lale, S., Ikic, M.: ‘Single-phase phase locked loop with DC offset and noise rejection for photovoltaic inverters’, Power Electron., 2014, 7, (9), pp. 22882299.
    3. 3)
    4. 4)
    5. 5)
      • 5. Golestan, S., Guerrero, J.M.: ‘DC-offset rejection in phase-locked loops: a novel approach’, IEEE Trans. Ind. Electron., 2016, 63, (8), pp. 49424946.
    6. 6)
    7. 7)
    8. 8)
      • 8. Leonard, W.: ‘Control of electrical drives’ (Springer-Verlag, Berlin, Germany, 1990).

Related content

This is a required field
Please enter a valid email address