A Generic Open-Loop Algorithm for Three-Phase Grid Voltage/Current Synchronization With Particular Reference to Phase, Frequency, and Amplitude Estimation
- 13 February 2009
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Electronics
- Vol. 24 (1), 94-107
- https://doi.org/10.1109/tpel.2008.2005580
Abstract
This paper presents a new open-loop architecture for three-phase grid synchronization based on moving average and predictive filters, where accurate measurements of phase, frequency, and amplitude are carried out in real time. Previous works establish that the fundamental positive sequence vector of a set of utility voltage/current vectors can be decoupled using Park's transformation and low-pass filters. However, the filtering process introduces delays that impair the system performance. More specifically, when the input signal frequency is shifted above the nominal, a nonzero average steady-state phase error appears in the measurements. To overcome such limitations, a suitable combination of predictive and moving average finite impulse response (FIR) filters is used by the authors to achieve a robust synchronization system for all input frequencies. Moving average filters are linear phase FIR filters that have a constant time delay at low frequencies, a characteristic that is exploited to good effect to design a predictive filter that compensates such time delays, enabling zero steady-state phase errors for shifted input frequencies. In summary, the main attributes of the new system are its good frequency adaptation, good filtering/transient response tradeoff, and the fact that its dynamics is independent of the input vector amplitude. Comprehensive experimental results validate the theoretical approach and the high performance of the proposed synchronization algorithm.Keywords
This publication has 45 references indexed in Scilit:
- The Benefit of Excluding Institutional Investors from Fixed-Price IPOs: Evidence from TaiwanEmerging Markets Finance and Trade, 2006
- Reply to "concerning "Odd-harmonic digital repetitive control of a single-phase current active filter""IEEE Transactions on Power Electronics, 2006
- Power Converter Line Synchronization Using a Discrete Fourier Transform (DFT) Based on a Variable Sample RateIEEE Transactions on Power Electronics, 2005
- Operation of Static Series Compensator Under Distorted Utility ConditionsIEEE Transactions on Power Systems, 2005
- Odd-Harmonic Digital Repetitive Control of a Single-Phase Current Active FilterIEEE Transactions on Power Electronics, 2004
- Phase locked loop system for FACTSIEEE Transactions on Power Systems, 2003
- Analytical modelling of HVDC-HVAC systemsIEEE Transactions on Power Delivery, 1999
- Operation of a phase locked loop system under distorted utility conditionsIEEE Transactions on Industry Applications, 1997
- A space vector-based rectifier regulator for AC/DC/AC convertersIEEE Transactions on Power Electronics, 1993
- A PWM AC-to-DC converter with fixed switching frequencyIEEE Transactions on Industry Applications, 1990