Results 51 to 60 of about 1,060 (162)

Performance Comparison of Grid-Faulty Control Schemes for Inverter-Based Industrial Microgrids

Energies, 2017
Several control schemes specifically designed to operate inverter-based industrial microgrids during voltage sags have been recently proposed. This paper first classifies these control schemes in three categories and then performs a comparative analysis ...
Antonio Camacho, Miguel Castilla, Franco Canziani, Carlos Moreira, Paulo Coelho, Mario Gomes, Pedro E. Mercado   +6 more
doaj   +1 more source

Proposal of voltage transient sag compensator with controlled gradational voltage

Electrical Engineering in Japan, 2005
This paper presents a new concept for a voltage transient sag compensator and the experimental result of its 400-V-class compensator. This compensator is composed of the series connection of some inverter units with gradational output voltages. Because each output voltage is different by 2n times, an approximate sinusoidal voltage is generated by ...
Masaki Yamada, Akihiro Suzuki, Akihiko Iwata, Toshiyuki Kikunaga, Hajimu Yoshiyasu, Kazuo Yamamoto, Nobuhiko Hatano   +6 more
openaire   +2 more sources

Voltage Compensation-Type Current Limiter Based on Hybrid Distribution Transformer for Power Quality Enhancement

EAI Endorsed Transactions on Energy Web
This paper presents a voltage compensation-type current limiter based on a hybrid distribution transformer (HDT) structure, which integrates a three-winding transformer, AC/DC converter, DC/AC converter, current-limiting unit, bypass switches, and a ...
Ruiayo Wang, Jianhua Wang, Han Yan, Weiming Chen, Yuanliang Fan   +4 more
doaj   +1 more source

Research on Voltage Prediction Using LSTM Neural Networks and Dynamic Voltage Restorers Based on Novel Sliding Mode Variable Structure Control

Energies
To address the issue of uncertainty in the occurrence time of voltage sags in power grids, which affects power quality, a voltage state prediction method based on LSTM neural networks is proposed for predicting voltage states.
Jian Xue, Jingran Ma, Xingyi Ma, Lei Zhang, Jing Bai   +4 more
doaj   +1 more source

Enhancing Electric-Gas–Integrated Energy Systems: Optimal Coupling Strategies for Mitigating Voltage Sag Effects

International Transactions on Electrical Energy Systems
Current research on electricity-gas–integrated energy systems (EG-IESs) often overlooks power quality issues prevalent in power systems. Voltage sags, critical and frequent power quality disturbance, significantly affect the EG-IES due to sensitive ...
Wei Zhao, Yi Zhang, Jiazhong Zhang
doaj   +1 more source

Measured Rare Voltage Sags and Clusters of Sags: Prediction Models Driven by the Intermittence Indices

IEEE Open Access Journal of Power and Energy
The field measurement campaigns have revealed that voltage sags also occur as clusters and not only as rare phenomena. The clusters of sags represent a stochastic process due to their time dependence; the rare satisfy the requirements for a Poisson ...
G. M. Casolino, M. de Santis, L. Di Stasio, C. Noce, P. Varilone, P. Verde   +5 more
doaj   +1 more source

Transient Synchronization Stability Control Strategy for Virtual Synchronous Converter Based on Phase Difference Locking

Technologies
With the increasing penetration of renewable energy sources, power systems require more grid-forming converters. Grid-forming converters with virtual synchronous generator control have transient stability problems similar to those of synchronous machines.
Jie Zhang, Si Yang, Kesheng Wang, Zhihao Wang, Weiyu Bao, Yunhai Lü, Hao Ding   +6 more
doaj   +1 more source

The influence of transformers, induction motors and fault resistance regarding propagation voltage sags

Ingeniería e Investigación, 2011
This article presents an analysis of voltage sag propagation. The ATPDraw tool was selected for simulating the IEEE 34 node test feeder. It takes into account both voltage sags caused by electrical fault network, as well as voltage sag propagation ...
Jairo Blanco, Ruben Darío Leal, Jonathan Jacome, Johann F. Petit, Gabriel Ordoñez, Víctor Barrera   +5 more
doaj  

Energy feature extraction and visualization of voltage sags using wavelet packet analysis for enhanced power quality monitoring. [PDF]

Sci Rep
Priyadarshini MS, Bajaj M, Zaitsev I.
europepmc   +1 more source

Fuzzy logic sliding mode controller based solar PV fed UPQC for improvement of dynamic performance and power quality enhancement in distribution power system. [PDF]

Sci Rep
Sravanthi G, Rosalina KM, Reddy TRS.
europepmc   +1 more source