Grid Synchronization Systems of Three-Phase Grid-Connected Power Converters: A Complex-Vector-Filter Perspective

Li, Weiwei; Ruan, Xinbo; Bao, Chenlei; Pan, Donghua; Wang, Xuehua

doi:10.1109/tie.2013.2262762

Cited by 193 publications

(92 citation statements)

References 43 publications

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“…The conventional TOGI structure in reference [8] is shown in Figure 2a, which has one input and two outputs. The two outputs are the direct axis component and quadrature axis of the filtered signal.…”

Section: Design Of Mtogimentioning

confidence: 99%

An Efficient Hybrid Filter-Based Phase-Locked Loop under Adverse Grid Conditions

Hui

Wang

2018

Energies

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Synchronous-reference-frame phase-locked loop (SRF-PLL) is widely used in grid synchronization applications. However, under unbalanced, distorted and DC offset mixed grid conditions, its performance tends to worsen. In order to improve the filtering capability of SRF-PLL, a modified three-order generalized integrator (MTOGI) with DC offset rejection capability based on conventional three order generalized integrator (TOGI) and an enhanced delayed signal cancellation (EDSC) are proposed, then dual modified TOGI (DMTOGI) filtering stage is designed and incorporated into the SRF-PLL control loop with EDSC to form a new hybrid filter-based PLL. The proposed PLL can reject the fundamental frequency negative sequence (FFNS) component, DC offset component, and the rest of harmonic components in SRF-PLL input three-phase voltages at the same time with a simple complexity. The proposed PLL in this paper has a faster transient response due to the EDSC reducing the number of DSC operators. A small-signal model of the proposed PLL is derived. The stability is analyzed and parameter design guidelines are given. Experimental results are included to validate the effectiveness and robustness of the proposed PLL.

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Section: Design Of Mtogimentioning

confidence: 99%

An Efficient Hybrid Filter-Based Phase-Locked Loop under Adverse Grid Conditions

Hui

Wang

2018

Energies

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“…In the literature, a large number of single-phase grid synchronization techniques have been proposed. Discrete Fourier transform [6], zero-crossing detection [7], Kalman filtering [8], least-squares estimation algorithm [9], artificial neural network [10], adaptive notch filter [11], complex-vector filter [12], and phase-locked loop (PLL) [13]- [25] are some of them. Among these reported grid synchronization approaches, PLLs have become the most widely used solutions.…”

Section: Introductionmentioning

confidence: 99%

A Novel Open-Loop Frequency Estimation Method for Single-Phase Grid Synchronization Under Distorted Conditions

Fang

Dong

et al. 2017

IEEE J. Emerg. Sel. Topics Power Electron.

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Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.2168-6777 (c) 2016 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information. This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Abstract-In this paper, a new open-loop architecture with good dynamic performance and strong harmonic rejection capability is proposed for single-phase grid synchronization under distorted conditions. Different from previous single-phase grid synchronization algorithms based on the phase locked loop (PLL) technique, the proposed method is to estimate the frequency and phase angle of the grid voltage in an open-loop manner so that fast dynamic response and enhanced system stability can be achieved. Firstly, an open-loop frequency estimation algorithm is introduced under ideal grid condition. Then, it is extended to distorted grid voltages through the combination of the developed frequency estimation unit and a pre-filtering stage consisting of a second-order lowpass filter and a cascaded delayed signal cancellation (DSC) module. In addition, a transient process smoothing (TPS) unit is designed to achieve smooth frequency transients in cases where the grid voltage experiences fast and large changes. The working principle of the new frequency estimation algorithm and the developed single-phase grid synchronization approach is given in detail, together with some simulation and experiment results for verifying their performance.

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“…These distributed generators (DGs) require new power electronic interfaces and control strategies to improve the efficiency and quality [2,3]. DG systems based on a single intermittent source, either photovoltaic (PV) or wind energy system are unreliable due to seasonal variations.…”

Section: Introductionmentioning

confidence: 99%

Sensorless Fuzzy-Logic-Based Maximum Power Point Tracking Control For A Small-Scale Wind Power Generation Systems With A Switched mode Rectifier

Selvi¹,

rajan²

2017

IJMSR

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Abstract:A fuzzy inference system (FIS) based sensor less maximum power point tracking (MPPT) algorithm has been proposed. The Fuzzy based controller has the ability to track the maximum power point (MPP) and the corresponding rotor speed of the wind generator by estimating wind speed with very little error compared to the conventional MPPT techniques. The algorithm developed is based on two series fuzzy networks, one for wind speed estimation and the other to determine the maximum power point and the corresponding rotor speed. The method demonstrates remarkable performance in estimating wind speed and to predict MPP accurately without undesired oscillations around maximum power point. The algorithm does not require any mechanical sensor for wind speed measurement. Nonlinear time domain simulations have been carried out to validate the effectiveness of the proposed controllers under different operating conditions. Simulation results confirm the effectiveness of the proposed MPPT controller in tracking the maximum power point under rapidly changing wind conditions.

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Grid Synchronization Systems of Three-Phase Grid-Connected Power Converters: A Complex-Vector-Filter Perspective

Cited by 193 publications

References 43 publications

An Efficient Hybrid Filter-Based Phase-Locked Loop under Adverse Grid Conditions

An Efficient Hybrid Filter-Based Phase-Locked Loop under Adverse Grid Conditions

A Novel Open-Loop Frequency Estimation Method for Single-Phase Grid Synchronization Under Distorted Conditions

Sensorless Fuzzy-Logic-Based Maximum Power Point Tracking Control For A Small-Scale Wind Power Generation Systems With A Switched mode Rectifier

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