Results 21 to 30 of about 9,547 (132)
IEEE Access, 2022 To improve the performance of the frequency lock loop (FLL) under the conditions of a distorted power grid and unexpected noise, a new type of frequency locked loop (Al-FLL) is proposed, in which the AL-FLL prefilter is formed by fusing two first-order ...
Lei Pan, Zhen Li, Jingmei Zhang, Yi Pang
doaj +1 more source
IET Power Electronics, Volume 16, Issue 16, Page 2625-2637, 16 December 2023., 2023 The presented work utilized a solid‐state transformer with an active clamped L‐L type current fed front‐end converter for maximum power extraction from PV arrays by providing ZVS operation to primary side switches and ZCS operation to secondary side rectifier diodes.
Nitesh Kumar, Pramod Agarwal
wiley +1 more source
Analysis and modelling of a phase‐locked loop based on a novel cascade structure of SOGI
IET Power Electronics, Volume 16, Issue 15, Page 2549-2559, 25 November 2023., 2023 Make two unique in‐loop filter structures, namely cascade dual second‐order generalized integrator (CDSOGI) and corresponding phase‐locked loop structures. The proposed phase‐locked loop's approximation small signal model based on CDSOGI is established, and the method for designing the system control parameters is also provided Abstract In order to ...
Shanwen Ke, Yuren Li
wiley +1 more source
On‐line identification of power transformer short‐circuit parameters based on instantaneous phasor
IET Electric Power Applications, Volume 17, Issue 8, Page 1101-1110, August 2023., 2023 An instantaneous phasor extraction method based on Second‐Order Generalised Integrator Frequency‐Locked Loop is introduced, and then an on‐line identification algorithm of power transformer short‐circuit parameters based on an instantaneous phasor is proposed.
Meiyu Han +3 more
wiley +1 more source
IET Renewable Power Generation, Volume 17, Issue 9, Page 2160-2173, 6 July 2023., 2023 Based on the accurate small‐signal model with particular focus on the frequency adaption (FA), this paper proposes an optimal design method for these advanced PLLs. The analysis shows that the truly optimal parameters are quite different with those provided in the literature, and the dynamic performance is significantly enhanced without degrading the ...
Yihui Xia +3 more
wiley +1 more source
IET Generation, Transmission &Distribution, Volume 17, Issue 7, Page 1442-1460, April 2023., 2023 The proposed power‐sharing approach‐based primary control for a single‐phase inverter is shown in Figure 1. Power computation and virtual impedance based control method is highlighted in this figure. Abstract Computation of active and reactive powers is a crucial step in droop‐controlled single‐phase voltage source inverters (VSIs) in standalone ...
Abdelhamid Kherbachi +3 more
wiley +1 more source
IET Energy Systems Integration, Volume 5, Issue 1, Page 15-28, March 2023., 2023 Abstract This study presents a grid interactive solar photovoltaic (PV) system proficient with low voltage ride through capability. When the supply voltage drops more than 10%, the solar PV system remains connected and continues to supply the active power to the loads as well as to the grid. Along with the active power supply, the solar PV array system
Subarni Pradhan +2 more
wiley +1 more source
Improved generalised integrator for optimal dispatch of SyRG‐based pico‐hydro‐PV system
IET Energy Systems Integration, 2022 The fluctuating outputs from renewable energy sources (RESs) and variable load power demand deteriorate the current quality, thus an improved generalised integrator with a frequency‐locked loop (IGI‐FLL) control strategy is used, which is not only easy ...
Rohini Sharma, Bhim Singh, Seema Kewat
doaj +1 more source
Three‐phase algorithm for independent single‐phase grid frequency estimation under grid disturbances
IET Generation, Transmission &Distribution, Volume 17, Issue 2, Page 438-447, January 2023., 2023 Abstract This paper reports an algorithm for quick and precise estimation of the single‐phase grid frequency under DC offset and both odd and even harmonics. The proposed single‐phase grid frequency estimation method is derived from a three‐phase relation.
Md. Shamim Reza, Md. Maruf Hossain
wiley +1 more source
Simplified Second-Order Generalized Integrator - Frequency-Locked Loop
Advances in Electrical and Electronic Engineering, 2019 Second-Order Generalized Integrator -- Frequency-Locked Loop (SOGI-FLL) is a popular technique available in the grid synchronization literature. This technique uses gain normalization in the frequency locked-loop.
Hafiz Ahmed, Mohamed Benbouzid
doaj +1 more source