Double fundamental frequency PLL with second order generalized integrator under unbalanced grid voltages

Yan, Zhaoyang; He, Hongyan; Li, Jianxia; Су, Минг; Zhang, Chunjiang

doi:10.1109/peac.2014.7037838

Cited by 13 publications

(6 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, frequency estimation can be achieved either by Phase Locked Loops (PLL)s [22], [24], [25] or Frequency Locked Loops (FLL)s [16], [26], [27], [28]. In the presence of DC-offsets, the classic frequency adaption is not possible anymore, so in [23] (see above), multiple PLL-designs are discussed.…”

Section: Motivation and Literature Reviewmentioning

confidence: 99%

A unified method for signal parameter estimation of arbitrarily distorted single-phase grids with DC-offset

Hackl¹

2020

Preprint

View full text Add to dashboard Cite

A unified method is presented which allows to estimate all harmonic components, DC-offset and fundamen- tal frequency in arbitrarily distorted single-phase grids us- ing a frequency-adaptive observer (FAO) consisting of modi- fied Second-Order Generalized Integrators (mSOGIs), a DC- Integrator (DCI) and a modified Frequency Locked Loop (mFLL). DCI and mSOGIs are tuned by pole placement which allows for an arbitrarily fast detection of DC-offset and harmonic components if the fundamental frequency is known. If the fundamental frequency must be estimated as well, a mFLL with Gain Normalization (GN), Rate Limitation (RL), Anti-Windup (AW) strategy and low-pass filters (LPF) must be employed. The effectiveness of the proposed FAO is validated by experimental results and its enhanced performance is shown by comparisons to existing estimation methods.

show abstract

Section: Motivation and Literature Reviewmentioning

confidence: 99%

A unified method for signal parameter estimation of arbitrarily distorted single-phase grids with DC-offset

Hackl¹

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Generally, an ideal QSG should have good properties, such as fast response, good filtering capability and it will be better if the QSG could generate the output voltages with the same THD even in imaginable grid conditions. Although many QSG schemes have been presented, such as SOGI‐based QSG [12, 13], no one scheme possesses all properties mentioned above. In this scenario, a new type of QSG is proposed.…”

Section: Proposed Qsgmentioning

confidence: 99%

Robust frequency‐locked loop algorithm for grid synchronisation of single‐phase applications under distorted grid conditions

Bei

Wang

2016

IET Generation, Transmission & Distribution

View full text Add to dashboard Cite

“…It is a great challenge to propose a strategy can eliminate random harmonic error if the estimated back-EMF contains multiple orders harmonics. The dual second order generalized integrator (DSOGI) has been used in the power system to eliminate the current harmonics [17,18]. Also, the DSOGI can be used in the rotor position observer to reduce the back-EMF harmonics.…”

Section: Introductionmentioning

confidence: 99%

Improved Sliding Mode Observer for Position Sensorless Open-Winding Permanent Magnet Brushless Motor Drives

Lu¹,

Li²,

Zhu³

et al. 2019

PIER M

View full text Add to dashboard Cite

To enhance the accuracy of estimated rotor position for sensorless controlled permanent magnet synchronous motor, the strategy based on sliding mode observer (SMO) with dual second order generalized integrator (DSOGI) is proposed. The SMO is utilized to estimate the back electromotive force (EMF). Considering the estimated back-EMF harmonics resulting from both flux spatial harmonics and inverter nonlinearities, the DSOGI is applied to eliminate multiple orders harmonics and extract the fundamental wave of the estimated back-EMF for calculating the rotor position. Therefore, the DSOGI can effectively reduce the influence of the estimated back-EMF harmonics and improve the accuracy of rotor position estimation. In addition, the software quadrature phase-locked loop with back-EMF normalization is utilized to calculate the rotor position in order to eliminate the influence of the changed back-EMF magnitude at different speed. Finally, to illustrate the effectiveness of the proposed strategy, the experimental platform of an open-winding permanent magnet brushless motor is built. The comparison results verified that the drive system performance of both steady state and dynamic state is improved.

show abstract

Double fundamental frequency PLL with second order generalized integrator under unbalanced grid voltages

Cited by 13 publications

References 9 publications

A unified method for signal parameter estimation of arbitrarily distorted single-phase grids with DC-offset

A unified method for signal parameter estimation of arbitrarily distorted single-phase grids with DC-offset

Robust frequency‐locked loop algorithm for grid synchronisation of single‐phase applications under distorted grid conditions

Improved Sliding Mode Observer for Position Sensorless Open-Winding Permanent Magnet Brushless Motor Drives

Contact Info

Product

Resources

About