Results 41 to 50 of about 639 (185)

RES‐AD: An AutoML‐Driven Robust Ensemble Framework for Real‐Time Anomaly Detection and Energy Forecasting in Smart Grids

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT Accurate load forecasting and reliable anomaly detection are critical for the stable operation of modern smart grids (SGs), which increasingly rely on cyber‐connected infrastructures. However, the integration of smart metres and two‐way communication exposes SGs to data integrity attacks that can manipulate consumption measurements, degrade ...
Murad Ali Khan, Naeem Iqbal, Syed Shehryar Ali Naqvi, Muhammad Faseeh, Do‐Hyeun Kim   +4 more
wiley   +1 more source

Investigation of the Simplified Equivalent Circuit Model of the Post‐Arc Sheath Stage in DC Vacuum Circuit Breakers

High Voltage, EarlyView.
ABSTRACT This paper presents a simplified equivalent circuit model (ECM) for the post‐arc sheath stage in DC vacuum circuit breakers and outlines the method for calculating circuit parameters using the particle‐in‐cell Monte Carlo collision (PIC‐MCC) method. The post‐arc sheath is modelled as a parallel combination of a variable resistor and a variable
Xubin Li, Xingyu Guo, Wen Wang, Xiaoming Liu, Minfu Liao, Jiyan Zou   +5 more
wiley   +1 more source

Surface Micro‐Discharge Plasma for Multiple Teeth Bleaching: Efficacy, Mechanism and Safety

High Voltage, EarlyView.
ABSTRACT Hydrogen peroxide (H2O2) is the commonly‐used bleaching chemical in clinical practice, but its excessive concentrations can cause tooth damage. Atmospheric pressure cold plasma is considered a promising new technique for tooth bleaching. Surface micro‐discharge (SMD) devices can generate large‐scale plasma, which holds potential for treating ...
Ruike Chen, Haoran Feng, Yinglong Li, Hong Pan, Hangbo Xu, Zhen Jiao, Dongjie Cui, Ruonan Ma   +7 more
wiley   +1 more source

T-Type Modular DC Circuit Breaker (T-Breaker) as a Compensator for Future DC Grids

IEEE Access, 2023
When ac and dc microgrids get exposed to load power changes or voltage transients, instability could occur owing to constant power loads’ (CPLs) behaviour. CPL has the negative impedance behaviour which is the reason behind such instability. A flexible alternating current transmission system (FACTS) devices are used in ac grid to help improve ...
Faisal Alsaif, Yue Zhang, Xiao Li 0078, Nihanth Adina, Khalid Alkhalid, Jin Wang   +5 more
openaire   +2 more sources

Interruption characteristics of self-powered hybrid DC circuit breaker with synergistic effect of step-down and divided current

International Journal of Electrical Power & Energy Systems
The DC voltage level of photovoltaic and PEDF applications have continuously advanced, reaching up to DC3000V. This presents new requirements for DC circuit breakers operating at higher voltages (>DC1500V) to ensure effective fault protection in the DC ...
Jianning Yin, Xiaojian Lang, Jiandong Duan, Shuhua Liang, Xingwen Li   +4 more
doaj   +1 more source

Short-Circuit Fault Current Modeling of a DC Light Rail System with a Wayside Energy Storage Device

Energies, 2022
This paper proposes a simulation model to calculate short-circuit fault currents in a DC light rail system with a wayside energy storage device. The simulation model was built in MATLAB/Simulink using the electrical information required to define a ...
Petru Valentin Radu, Miroslaw Lewandowski, Adam Szelag, Marcin Steczek   +3 more
doaj   +1 more source

Post‐Arc Transient Dielectric Recovery Characteristics of Vacuum Interrupter in the Large‐Capacity Generator Circuit Breaker

High Voltage, EarlyView.
ABSTRACT Large‐capacity generator circuit breaker (GCB) based on vacuum interrupter technology is the key power equipment to ensure the safe operation of the power system. When the short‐circuit current was forced to cross zero, the large‐capacity GCB was difficult to generate a zero‐voltage environment through freewheeling, the vacuum interrupter (VI)
Xiangyu Han, Fei Yang, Yili Chen, Yunqi Wang, Chenle Zhai, Xuliang Zhao, Zhaowei Diao, Yi Wu, Mingzhe Rong   +8 more
wiley   +1 more source

Arc Resistance Enhancement of Converter Transformer Tank Through Structural Improvements: Simulation and Experimental Validation

High Voltage, EarlyView.
ABSTRACT Currently, limited research exists on the structural response and protection methods of the converter transformer tank for ± 800 kV ultra‐high voltage direct current transmission project to high energy arc faults. This research investigates the dynamic response and the vulnerable areas of the ultra‐high voltage converter transformer under the ...
Ke Wang, Shuqi Zhang, Yikun Zhao, Yichen Wang, Zongliang Zhang, Jinhua Zhang   +5 more
wiley   +1 more source

Advancements in Z-Source Solid-State Circuit Breakers for Enhanced Protection of DC Distribution Networks: A Comprehensive Review

Active and Passive Electronic Components
DC technologies constitute essential components within the scope of DC distribution networks. All DC networks confront inherent threats, such as DC short-circuit faults, necessitating robust protective measures.
Sabah Daniar, Amirhossein Khosravi Sarvenoee   +1 more
doaj   +1 more source

Comparison of Dielectric Recovery After Arc Burning in SF6 Gas and Its Potential Alternatives

High Voltage, EarlyView.
ABSTRACT Although sulphur hexafluoride (SF6) exhibits exceptional insulating properties, it is a potent greenhouse gas. Therefore, studying alternatives to SF6 is critical for developing environmentally friendly high‐voltage electrical equipment.
Ziqi Liu, Hao Sun, Yi Wu, Mingzhe Rong, Zeyuan Luo   +4 more
wiley   +1 more source