Results 41 to 50 of about 554 (136)
Echocardiography, Volume 43, Issue 6, June 2026.Patients with symptomatic primary hyperparathyroidism (PHPT) have increased cardiovascular risk related to biochemical abnormalities and structural cardiac changes. We performed a meta‑analysis of 24 studies (881 patients) to evaluate echocardiographic changes following parathyroidectomy. Global longitudinal strain significantly improved after surgery,
Arsalan Anees +2 more
wiley +1 more source
Energy Science &Engineering, Volume 14, Issue 4, Page 2263-2276, April 2026.Small‐signal modeling reveals that insufficient system damping positions conjugate poles near the imaginary axis, fundamentally explaining the SFR mechanism. A virtual resistance control is consequently proposed to damp the resonance and effectively suppress SFR, which is validated through Hardware‐in‐the‐Loop experiments.
Yujie Gu +3 more
wiley +1 more source
ENHANCING LOW VOLTAGE RIDE THROUGH CAPABILITY IN UTILITY GRID CONNECTED SINGLE PHASE SOLAR PHOTOVOLTAIC SYSTEM [PDF]
Journal of Engineering Science and Technology, 2018 The steady rise in utility grid penetration of single phase solar photovoltaic system has contributed to the mandatory requirement of Low Voltage Ridethrough (LVRT) capability. LVRT capability provides stable grid integration during transient conditions.
RINI ANN JERIN A. +3 more
doaj
Engineering Reports, Volume 8, Issue 2, February 2026.Under identical conditions, we benchmark PID against Fuzzy‐Logic control for a single‐phase H‐bridge inverter. FLC achieves faster rise/settling with lower THD and better disturbance rejection than tuned PID while requiring explicit rule design—offering a reproducible baseline and deployment guidance for power‐quality‐constrained inverter applications.
Baraa Taha +4 more
wiley +1 more source
Wind Energy, Volume 29, Issue 2, February 2026.ABSTRACT The focus on wind power frequency regulation has largely been on individual wind farms, which presents challenges in meeting the coordinated operation needs of multiple stations within large‐scale installations. To address issues of model simplification and accuracy, we propose a large‐scale wind farm equivalent modeling method based on ...
Hongchun Shu +4 more
wiley +1 more source
Energy Science &Engineering, Volume 14, Issue 1, Page 583-610, January 2026.Decentralized energy systems are gaining momentum, and microgrids have become a vital component of the modern power landscape. Yet, maintaining power quality within these systems presents ongoing challenges due to the presence of nonlinear loads, variable renewable energy sources, and frequent switching operations.
Mahnoor Zahid +5 more
wiley +1 more source
LVRT and Stability Enhancement of Grid-Tied Wind Farm Using DFIG-Based Wind Turbine
Applied System Innovation, 2021 According to the grid code specifications, low voltage ride-through (LVRT) is one of the key factors for grid-tied wind farms (WFs). Since fixed-speed wind turbines with squirrel cage induction generators (FSWT-SCIGs) require an adequate quantity of ...
Jannatul Mawa Akanto +2 more
doaj +1 more source
Energy Science &Engineering, Volume 14, Issue 1, Page 266-280, January 2026.This study establishes a hybrid microgrid model integrating a Doubly Fed Induction Generator (DFIG), a photovoltaic (PV) array, and a battery energy storage system, and proposes a coordinated control framework. The DFIG regulates DC‐bus voltage through the grid‐side converter and performs maximum power tracking via the rotor‐side converter, while the ...
Chunyan Li +4 more
wiley +1 more source
IET Circuits, Devices &Systems, Volume 2026, Issue 1, 2026.Aiming at the modeling problem of bipolar distributed photovoltaic (DPV) cluster, this paper proposes a clustering equivalent modeling method based on clustering algorithm. First, by analyzing the detailed model of bipolar DPV, it is found that the indexes that can reflect its steady‐state and dynamic characteristics mainly include energy storage ...
Tianyu Zhang, Hassan Haes Alhelou
wiley +1 more source
IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.This paper proposes a hybrid sensorless control strategy for a permanent magnet synchronous generator (PMSG)‐based wind energy conversion system (WECS). The approach integrates finite‐set predictive current control (FS‐PCC), a model reference adaptive system (MRAS) estimator and an optimal torque control maximum power point tracking (MPPT‐OTC) method ...
Hicham Sayhi +7 more
wiley +1 more source