Results 41 to 50 of about 397 (141)

Advanced Virtual Impedance for Power‐Sharing Improvement in Microgrids Using Different SOGI Methods: A Comparative Study

Energy Technology, Volume 14, Issue 2, February 2026.
Advanced virtual impedance control integrating multiple second‐order generalized integrator (SOGI) variants—SOGI, ESOGI, MSOGI, and DSOGI—enhances power and harmonic sharing accuracy in islanded microgrids. The comparative study quantifies performance–complexity trade‐offs, demonstrating up to 65% total harmonic distortion (THD) reduction and improved ...
Camelia Ait Hammouda, Abdellah Benallal, Rafik Bradai, Adrian Ilinca   +3 more
wiley   +1 more source

An Enhanced Double Second‐Order Generalised Integrator–Based Phase‐Locked Loop Featuring Multisource Frequency Fusion and Adaptive Damping for Weak‐Grid Conditions

IET Energy Systems Integration, Volume 8, Issue 1, January/December 2026.
ABSTRACT As the penetration rate of renewable energy represented by photovoltaic (PV) power in power systems continues to increase, the synchronisation stability of grid‐connected inverters under weak‐grid conditions faces severe challenges. The double second‐order generalised integrator–based phase‐locked loop (DSOGI‐PLL), a key technology for grid ...
Changzhou Yu, Wei Fang, Deyu Zhu, Junhua Dong, Yanying Tu, Haizhen Xu, Leilei Guo   +6 more
wiley   +1 more source

A Novel Coordinated Control Strategy for VSG to Enhance Power Tracking Speed Without Degrading Inertia Support Capability

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
ABSTRACT The virtual synchronous generator (VSG), as a representative grid‐forming control method, has become a key technology in distributed renewable energy systems. However, there exists an inherent trade‐off between fast power reference tracking and high virtual inertia support in conventional VSG control.
Yubin Pang, Xiaohui Qu, Guanglei Yan, Zhicong Huang   +3 more
wiley   +1 more source

A Review of State‐of‐the‐Art Developments in Large‐Scale Photovoltaic Solar Renewable Energy Systems

Journal of Engineering, Volume 2026, Issue 1, 2026.
This paper provides a comprehensive review of recent advancements in large‐scale photovoltaic (PV) systems, covering technological innovations, optimization strategies, power converter integration methods, and challenges in monitoring and maintenance.
Lyu Guanghua, Syed Hadi Hussain Shah, Asad A. Zaidi, Faisal Nawaz, Sohaib Z. Khan, Assed Naked Haddad   +5 more
wiley   +1 more source

A Grid Synchronization PLL Method Based on Mixed Second- and Third-Order Generalized Integrator for DC-Offset Elimination and Frequency Adaptability [PDF]

, 2018
The second order generalized integrator (SOGI) has been widely used to implement grid synchronization for grid-connected inverters, and from grid voltages it is able to extract the fundamental components with an output of two orthogonal sinusoidal ...
Xiaohuan Wang, Xiuhui Chai, Zhao, Xiaojun, Wang, Xiaohuan, Guo, Xiaoqiang, Xiaoqiang Guo, Chai, Xiuhui, Chunjiang Zhang, Zhang, Zhe, Zhang, Chunjiang, Zhe Zhang, Xiaojun Zhao   +11 more
core   +1 more source

Research on TOGI‐EFLL flux observer for IPMSM sensorless control

IET Power Electronics
For the purpose of enhancing the performance of interior permanent magnet synchronous motors (IPMSMs) sensorless control, a flux observer based on a third‐order generalized integrator with enhanced frequency‐locked loop (TOGI‐EFLL) is introduced in this ...
Xue Hao, Yutao Luo
doaj   +1 more source

Speed and Position Estimation for 5-ph PMSM Using SOGI Based on SMO Considering Short-Circuit Fault

IEEE Access
To cancel harmonics and get fundamental back EMFs for precise rotor position and speed estimations under short-circuit (SC) fault, this article introduces a new sensorless fault-tolerant control method for 5-phase PMSM using a sigmoid sliding mode ...
Abdallah Farahat, Zhengmeng Liu, Guohai Liu, Qian Chen   +3 more
doaj   +1 more source

“Sexual Orientations, Like Relationships, Are Messy”: How LGBTQ+‐Related Stressors Contribute to College Students' Relationship Dissolution

Personal Relationships, Volume 32, Issue 4, December 2025.
ABSTRACT Individuals who identify as lesbian, gay, bisexual, transgender, queer, or other minoritized sexual and gender identities (LGBTQ+) are at greater risk of experiencing stressors due to their diverse sexual and gender identities. These stressors extend to LGBTQ+ individuals' romantic relationships and can result in relationship dissolution.
Alyssa N. Clark, Tracy L. Walters, Veronica Hanna‐Walker, Madeline J. Hebert, Amanda Denes, Eva S. Lefkowitz   +5 more
wiley   +1 more source

Improved Nonlinear Flux Observer-Based Second-Order SOIFO for PMSM Sensorless Control [PDF]

, 2019
The conventional rotor flux estimation method has issues of dc offset and harmonics, which are caused by initial rotor flux, detection errors, etc. To eliminate these defects, one improved nonlinear flux observer is proposed for sensorless control of ...
Yajie Jiang, Chaoxu Mu, Jiang, Yajie, Wei Xu, Mu, Chaoxu, Blaabjerg, Frede; id_orcid, Frede Blaabjerg, Xu, Wei   +7 more
core   +1 more source

Standard SOGI-FLL and Its Close Variants:Precise Modeling in LTP Framework and Determining Stability Region/Robustness Metrics [PDF]

, 2021
In recent years, single-phase frequency-locked loops (FLLs) are gaining more popularity as a signal processing and synchronization tool in a wide variety of engineering applications.
Guerrero, Josep M.; id_orcid, Al-Turki, Yusuf, Abusorrah, Abdullah M., Vasquez, Juan C.; id_orcid, Golestan, Saeed; id_orcid   +4 more
core   +1 more source