Results 51 to 60 of about 471 (171)

A Comparative Study on Battery Modelling via Specific Hybrid Pulse Power Characterization Testing for Unmanned Aerial Vehicles in Real Flight Conditions

World Electric Vehicle Journal
Battery modelling is essential for optimizing the performance and reliability of Unmanned Aerial Vehicles (UAVs), particularly given the challenges posed by their dynamic power demands and limited onboard computational resources. This study evaluates two
Waiard Saikong, Prasophchok Phumma, Suradet Tantrairatn, Chaiyut Sumpavakup   +3 more
doaj   +1 more source

A New Approach for Estimation of Lithium‐Ion Battery State of Charge and Health Using Mixed H∞/H2 Control With Sliding Mode Observer

Battery Energy, Volume 5, Issue 1, January 2026.
The rise of renewable energy sources is accompanied with a depletion of raw materials used in batteries. The project summarized in this paper presents a system aiming to estimate the SOC and SOH of Lithium‐Ion Battery. This is achieved Using Mixed H∞/H2 Control with Sliding Mode Observer.
Chadi Nohra, Jalal Faraj, Bechara Nehme, Mahmoud Khaled, Rachid Outbib   +4 more
wiley   +1 more source

The analysis of the threshold value of the complex short-circuit ratio index and its significance in the context of static voltage stability

Frontiers in Energy Research
The short-circuit ratio index (SCR) can effectively quantify the voltage support strength in traditional DC grid-connected scenarios, yet it cannot reasonably describe the voltage support strength in diverse device grid connection scenarios.
Pan Lei, Jinquan Zhao
doaj   +1 more source

HYBRID EQUIVALENT CIRCUIT GENERATION [PDF]

Carpathian Journal of Electrical Engineering, 2021
The main objective of this paper is to correctly define the hybrid equivalent circuits. These circuits allow the separation of the linear portions of electronic circuits from the nonlinear ones and in this way the polarization process of electronic ...
Mihaela GRIB, Ionela VLAD, Ovidiu Dorin LĂUDATU, Alexandru Radu GRIB, Mihai IORDACHE   +4 more
doaj  

Identifying Oscillation‐Vulnerable Buses Using Impedance‐Based Reflection Coefficient

Electronics Letters, Volume 62, Issue 1, January/December 2026.
We propose a method to identify oscillation‐vulnerable buses by applying the Barkhausen criterion to an impedance‐based reflection‐coefficient analysis in power systems. The method computes the reflection‐coefficient magnitude and phase from the Thevenin impedance seen from each bus and the corresponding load impedance, and evaluates phase variations ...
Taewan Choi, Hyun‐Keun Ku, Jaehyeong Lee, Dongho Lee   +3 more
wiley   +1 more source

Real‐Time Active Power Control Method Considering Voltage Security Constraints and Effective Regulation Space of Multitype Resources

IET Energy Systems Integration, Volume 8, Issue 1, January/December 2026.
ABSTRACT Renewable energy bases in Desert‐Gobi‐Wasteland (DGW) areas connected with high‐voltage direct current (HVDC) transmission systems show notable weak‐grid features, including low inertia, weak damping and a low short‐circuit ratio. This results in strong active power–voltage (P–V) coupling effects, making existing real‐time active power control
Guoqing Li, Heyang Sun, Shouqi Jiang, Yechun Xin, Jian Lou   +4 more
wiley   +1 more source

A High-Efficiency RF Harvester with Maximum Power Point Tracking

Proceedings, 2018
This paper presents the implementation of a high-efficiency radiofrequency (RF) harvester, which consists of a rectenna and a maximum power point tracker (MPPT).
Manel Gasulla, Francesc J. Robert, Josep Jordana, Edgar Ripoll-Vercellone, Jordi Berenguer, Ferran Reverter   +5 more
doaj   +1 more source

Ferromagnetically Shielded Fault Current Limiter (FS‐FCL) Evaluation in Power Line

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This study introduces a new ferromagnetically shielded FS‐FCL design and its control strategy for limiting and interrupting fault currents. The fully shielded core structure enhances inductance and prevents saturation, enabling an immediate fault response without causing voltage drop during normal conditions.
Kamran Ghorbanyan, Selim Acar
wiley   +1 more source

Stability and Synchronization of MMC‐HVDC Systems Using SRF and Inertia‐Based PLLs

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This study investigates the influence of synchronous reference frame PLL (SRF‐PLL) and the inertia PLL (IPLL) on the stability of grid‐connected modular multilevel converter high voltage direct current (MMC‐HVDC) systems. The findings highlight intrinsic stability limitations of PLL‐based systems, offering insights toward more stable, PLL‐less ...
Shuai Wang, Robin Preece, Mike Barnes
wiley   +1 more source

Total Distortion—A New Power Quality Index on Current Harmonic Evaluation for Users With Internal Loads and DERs

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
ABSTRACT The IEEE Std 519–2022 IEEE Standard for harmonic control in electric power systems is widely used for controlling the harmonics in the electric power system. It uses the total demand distortion (TDD) for current harmonic evaluation at the point of common coupling (PCC).
Sivaraman P, Sharmeela C, Sanjeevikumar P, Sabari B. K   +3 more
wiley   +1 more source