Two-sample PLL with improved frequency response applied to single-phase current sensorless bridgeless PFCs

Lamo, Paula; López, Felipe; Pigazo, Alberto; Azcondo, F.J.

doi:10.1109/compel.2017.8013281

Cited by 1 publication

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…should be the same as those of the VLTD-PLL. Notice that (11) is obtained by arranging a pole-zero cancellation in the original closed-loop transfer function of the VLTD-PLL [i.e., (10)]. Therefore, the equivalence of the VLTD-PLL and ATD-PLL is valid as long as the pole-zero cancellation is considered.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…The transfer delay is also a key element in implementing finite impulse response (FIR) filters, which are widely used for enhancing the PLL filtering capability under adverse grid conditions. The most popular FIR filter in the PLL applications is probably the delayed signal cancellation (DSC) operator 1 Creating a fictitious orthogonal signal using a delay length less than a quarter cycle is also possible [6]- [10]. But, it may reduce the PLL highfrequency noise immunity and, therefore, it should be used carefully under a noisy environment.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research On Variable-Length Transfer Delay and Delayed-Signal-Cancellation-Based PLLs

Golestan

Guerrero

Vasquez

et al. 2018

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

In power and energy applications, implementing a large number of phase-locked loops (PLLs) involves using transfer delays. These delays are employed for different control and filtering purposes, such as creating a fictitious orthogonal signal (which is required for the frame transformation in singlephase PLLs) and filtering harmonics, dc offset, and other disturbances. Depending on the application in hand and the expected variation range of the grid frequency, the length of these delays may be variable or fixed. Roughly speaking, the variablelength delays are often preferred for applications where large frequency drifts are anticipated and a high accuracy is required. To the best of authors' knowledge, the small-signal modeling of a variable-length delay-based PLL has not yet been conducted. The main aim of this paper is to cover this gap. The tuning procedure and analysis of these PLLs are then presented. As design examples, some well-known single-phase and three-phase PLLs are considered.

show abstract

Section: Performance Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%