A novel quasi-type-1 PLL based on frequency-fixed complex filter for three phase grid synchronization

Three-phase grid synchronization is one of the main techniques of the three-phase grid connected power inverters used in photovoltaic systems. This technique was used to reach the fast and accurate three-phase grid tied inverter synchronization. In this paper a new synchronization method is presented on the basis of integrating the grid voltage two times (line-to-line or phase voltage). This method can be called “double integral synchronization method” (DISM) as it integrates the grid voltage signals two times to generate the reference signals of three-phase photovoltaic inverter currents. DISM is designed and simulated in this paper to operate in both analog and digital circuits of three-phase photovoltaic inverter system with the same topology. The digital circuit design and dsPIC33FJ256GP710A as a microcontroller (the dsPIC33FJ256GP710A with the Explorer 16 Development Board from microchip) was used practically in this paper to generate and control the sine pulse width modulation (SPWM) technique according to DISM for three-phase photovoltaic inverter system. The main advantage for this method (DISM) is learning how to eliminate the integration constant to generate the reference signals without needing any reference signals or truth table, just the line-to-line or phase voltage of grid.

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Modeling the grid synchronization induced negative-resistor-like behavior in the output impedance of a three-phase photovoltaic inverter

2013 4th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) ◽

10.1109/pedg.2013.6785602 ◽

2013 ◽

Cited By ~ 42

Author(s):

T. Messo ◽

J. Jokipii ◽

A. Makinen ◽

T. Suntio

Keyword(s):

Output Impedance ◽

Grid Synchronization ◽

Three Phase

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Diagnostic Performance of Three-Phase Bone Scan for Complex Regional Pain Syndrome Type 1 with Optimally Modified Image Criteria

Nuclear Medicine and Molecular Imaging ◽

10.1007/s13139-011-0104-x ◽

2011 ◽

Vol 45 (4) ◽

pp. 261-267 ◽

Cited By ~ 12

Author(s):

Hyun Woo Kwon ◽

Jin Chul Paeng ◽

Francis Sahngun Nahm ◽

Seog Gyun Kim ◽

Tanzeel Zehra ◽

...

Keyword(s):

Complex Regional Pain Syndrome ◽

Bone Scan ◽

Diagnostic Performance ◽

Pain Syndrome ◽

Syndrome Type ◽

Three Phase

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Three-phase grid synchronization techniques for grid connected converters in distributed generation systems

2009 IEEE International Symposium on Industrial Electronics ◽

10.1109/isie.2009.5222080 ◽

2009 ◽

Cited By ~ 10

Author(s):

Davood Yazdani ◽

Majid Pahlevaninezhad ◽

Alireza Bakhshai

Keyword(s):

Distributed Generation ◽

Grid Synchronization ◽

Three Phase ◽

Grid Connected Converters

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Adaptive Filtering-Based Pseudo Open-Loop Three-Phase Grid-Synchronization Technique

Energies ◽

10.3390/en13112927 ◽

2020 ◽

Vol 13 (11) ◽

pp. 2927 ◽

Cited By ~ 2

Author(s):

Hafiz Ahmed ◽

Samet Biricik ◽

Elhoussin Elbouchikhi ◽

Mohamed Benbouzid

Keyword(s):

Adaptive Filtering ◽

Adaptive Filters ◽

Frequency Estimation ◽

Open Loop ◽

Phase System ◽

Comparative Performance ◽

Reduced Order ◽

Grid Synchronization ◽

Synchronization Problem ◽

Three Phase

This paper studies the grid-synchronization problem of three-phase system. Second-order adaptive filters are a popular tool for grid-synchronization. In this context, reduced-order generalized integrator has attracted some attention in recent time. However, existing implementations cannot control directly the closed-loop poles (real and imaginary) of reduced-order generalized integrator. To overcome this limitation, this paper proposes a novel reduced-order generalized integrator structure. To make the proposed technique frequency adaptive, an open-loop frequency estimation technique is also used. Comparative performance analysis are provided over two other advanced and recently proposed techniques. Results demonstrate the suitability and effectiveness of the proposed technique.

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