Results 61 to 70 of about 3,331 (294)

Avoiding the non-detection zone of passive loss-of-mains (islanding) relays for synchronous generation by using low bandwidth control loops and controlled reactive power mismatches [PDF]

, 2014
Generation connected to electrical distribution systems requires reliable and timely detection of loss of-mains (islanding). Passive loss of mains detection relays typically use measurements of parameters such as frequency, phase, and the magnitudes of ...
Roscoe, Andrew, Burt, Graeme, Bright, C.G.   +2 more
core   +1 more source

Enhanced Power Decoupling Strategy for Virtual Synchronous Generator [PDF]

IEEE Access, 2020
Power coupling caused by high impedance ratio and nonzero power angle is a crucial issue for virtual synchronous generator (VSG), which may result in output power error, slower power response and even invalid operation. To solve this issue, a novel enhanced power decoupling method by using virtual steady-state synchronous impedance (VSSI) and current ...
Mingxuan Li, Yue Wang 0018, Yonghui Liu 0004, Ningyi Xu, Sirui Shu, Wanjun Lei   +5 more
openaire   +2 more sources

Memristor‐Driven Active‐Matrix Organic Light‐Emitting Diode for Energy Efficient and High‐Resolution Displays

Advanced Functional Materials, EarlyView.
This study demonstrates that memristors can replace conventional 2T–1C driving circuits with simplified 1T–1 m architectures by exploiting resistance switching. With ultra‐low switching voltages (< ±0.2 V) and multi‐level resistance states, the memristors precisely control the current injected into organic light‐emitting diodes (OLEDs).
Dong Hyun Kim, Nahyun Kim, Seok Hee Hong, Ho Jin Lee, Jin Suk Oh, Jae Seong Park, Tae Geun Kim   +6 more
wiley   +1 more source

Low‐frequency oscillation damping strategy for power system based on virtual dual‐input power system stabilizer

IET Renewable Power Generation
To keep pace with the construction of the new‐type power system, virtual synchronous generator control, as a classical method of virtual inertia control, has been widely adopted due to its electromechanical characteristics similar to synchronous ...
Shengyang Lu, Meng Wu, Jia Liu, Haixin Wang, Luyu Yang, Qingshan Liu, Junyou Yang, Yuqiu Sui   +7 more
doaj   +1 more source

Enhancement of low-voltage ride-through capability for virtual synchronous generators based on virtual impedance voltage control

Energy Reports, 2023
Virtual Synchronous Generator (VSG)-based grid-forming converters (GFC) increasingly serve as interfaces between renewable energy resources and the power grids with high penetration. Although the emulation of the characteristics of Synchronous Generator (
Feng Ji, Zhuang Xu
doaj   +1 more source

A Novel Pre-Synchronization Control for Grid Connection of Virtual Synchronous Generator

Elektronika ir Elektrotechnika, 2020
The virtual synchronous generator (VSG) introduces rotational inertia and damping through the droop control to take part in frequency regulation of the grid. By building the VSG model, the VSG controller, including both the frequency controller and the excitation controller, are analysed and designed.
Chen, Xuhai, Zhang, Yiwang, Dong, Jiqing, Mao, Xingkui, Chen, Jiaqiao, Wen, Buyin, Zhang, Zhe; id_orcid 0000-0001-8407-3167   +6 more
openaire   +4 more sources

Solution‐Processed Two‐Dimensional Indium Oxide on Sodium‐Embedded Alumina for Reconfigurable Optoelectronic Synaptic Transistors

Advanced Functional Materials, EarlyView.
Wafer‐scale two‐dimensioanl In2Se3 oxidized into InOx on sodium‐embedded beta‐alumina enables multifunctional reconfigurable electronics. Sodium ions accumulate within distinct spatial distribution under drain‐controlle and gate‐controlled operation. Drain‐control operation gives controllability of ultraviolet‐driven optoelectronic synaptic conductance
Jinhong Min, Yonghyun Albert Kwon, Hyunbin Kim, Jihyun Kim, Myeongjin Jung, Jaewon Heo, Gwang Ya Kim, Vlastimil Mazanek, Zdeněk Sofer, In Soo Kim, Jeong Ho Cho, Hyesung Park, Sang Min Won, Joohoon Kang   +13 more
wiley   +1 more source

LSTM Data-Driven Model of Multi-scene Virtual Synchronous Generator

, 2023
This paper proposes a data-driven modeling approach using LSTM to accurately describe the dynamic characteristics of Virtual Synchronous Generator (VSG) systems. VSG technology allows grid-connected inverters to resemble synchronous generators externally.
Zhao, Jinbin, Wang, Yuzong, Zhang, Zhenhua, Zhu, Xiangchen; id_orcid, Tian, Jiangbin, Zeng, Guohui   +5 more
core   +1 more source

Ultrasmall High‐Entropy Materials: Nanoscale Effects, Synthesis, and Mechanistic Insights

Advanced Functional Materials, EarlyView.
This review article focuses on sub‐10 nm high‐entropy materials that combine nanoscale design with complex compositions for next‐generation applications. ABSTRACT Ultrasmall high‐entropy nanomaterials (USHENMs, <10 nm) merge multicomponent chemistry with size‐dependent effects, forming a distinct class of materials with unprecedented properties.
Yueyue He, Wenbo Wang, Simon Schweidler, Yanjiao Ma, Ben Breitung, Torsten Brezesinski   +5 more
wiley   +1 more source

Inertia and Damping Collaborative Adaptive Control Strategy  of Virtual Synchronous Generator

Journal of Harbin University of Science and Technology, 2019
Aiming at the problem of conventional distributed generation control technology that does not have the similarinertia and damping characteristics of synchronous generators, it can not teffectively resist frequency mutation caused by the micro-source ...
YAN Jing bin, YANG Chen, CHANG Long long, HOU Chen   +3 more
doaj   +1 more source