Results 51 to 60 of about 4,059 (119)

A Review on Transformerless Step-Up Single-Phase Inverters with Different DC-Link Voltage for Photovoltaic Applications

Energies, 2019
Photovoltaic (PV) energy has been competitive in power generation as an alternative to fossil energy resources over the past decades. The installation of grid-connected solar energy systems is expected to increase rapidly with the fast development of the
Wenjie Liu, Kamran Ali Khan Niazi, Tamas Kerekes, Yongheng Yang   +3 more
doaj   +1 more source

Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

Energies, 2018
Currently, the Direct-Current (DC) microgrid has been gaining popularity because most electronics devices require a DC power input. A DC microgrid can significantly reduce the AC to DC energy conversion loss.
Abdul Motin Howlader, Hidehito Matayoshi, Saeed Sepasi, Tomonobu Senjyu   +3 more
doaj   +1 more source

A Three-Phase Bidirectional Grid-Connected AC/DC Converter for V2G Applications

Journal of Control Science and Engineering, 2020
The smart grid and electric vehicles (EVs) are widely used all over the world. As the key role, the Vehicle-to-Grid (V2G) has been attracting increasing attention.
Jingang Han, Xiong Zhou, Song Lu, Pinxuan Zhao   +3 more
doaj   +1 more source

Coupling Characteristics and Construction Method of Single-AC Multi-DC Hybrid Grid

Energies
In regions with concentrated load centers in China, the AC transmission network is dense, leading to challenges such as difficulties in power flow control and excessive short-circuit currents.
Xingning Han, Ying Huang, Guoteng Wang, Hui Cai, Mingxin Yan, Zheng Xu   +5 more
doaj   +1 more source

An improved grid tied photovoltaic system based on current conditioning

Engineering Science and Technology, an International Journal, 2018
An interconnection of a renewable energy source: photovoltaic generator (PVG) with the power grid is investigated. The interconnection uses the conventional power inverter to link the DC PVG with the AC power grid sides.
Maamar Taleb, Noureddine Mansour, Khaled Zehar   +2 more
doaj   +1 more source

Enhanced dynamic support strategies of grid-forming-PMSG based on DC-voltagesynchronization: Frequency and Q support perspective

International Journal of Electrical Power & Energy Systems
The DC-Voltage Synchronization based Grid-Forming PMSG has voltage source characteristics, e.g. frequency and reactive power support function, however, the support capability is limited, and the regulation potential is not fully utilized.
Dejian Yang, Tongyu Hu, Taiying Zheng, Minhui Qian, Chaoquan Li, Zhijie Cao, Gangui Yan   +6 more
doaj   +1 more source

Vulnerability analysis of power grid structure based on complex network theory

Frontiers in Energy Research
IntroductionThe key nodes of an intelligent distribution network significantly impact the reliability and stability of the distribution network’s operation. The failure of these key nodes can severely affect the safe operation of the distribution network.
Zhichun Yang, Huaidong Min, Jie Zhao, Xuzhu Dong, Fan Yang, Chenhao Wang, Nan Zhang   +6 more
doaj   +1 more source

Hybrid Game-Based Optimal Scheduling of Multiple Integrated Energy Microgrids Considering Distribution Network Constraints

Energies
With the increasing penetration of distributed renewable energy, coordinated operation between distribution networks and multiple integrated energy microgrids (IEMs) has become increasingly important for improving operational economy and maintaining ...
Zhilu Liu, Lin Zheng, Jianfeng Zheng, Haoyang Tang, Longzhu Zhou, Zhijian Hu, Xue Chen   +6 more
doaj   +1 more source

Dual lanthanides synergistically boost stability and kinetics for spinel LiMn2O4 cathodes

Communications Chemistry
Mn-site doping in spinel LiMn2O4 (LMO) mitigates Mn3+-induced Jahn-Teller distortion. However, this strategy faces inherent trade-offs. Specifically, low-valent doping weakens oxygen bonding, while high-valent doping increases Mn3+ content.
Zhushun Zhang, Jun Du, Tenghao Li, Hengchao Sun, Shuai bing Li, Huakun Peng, Peng Liu, Dapeng Du, Tianyi Wang, Chengyin Wang, Likun Pan, Jiabao Li   +11 more
doaj   +1 more source

Coordinated Low-Voltage Ride-Through Control Strategy for Flywheel Energy Storage Systems

Applied Sciences
To address DC-link voltage fluctuation, active-power imbalance between the machine side and the grid side, and double-frequency distortion in the grid current of a flywheel energy storage system (FESS) under symmetrical and asymmetrical voltage sag ...
Dahai Guo, Guangchen Liu, Jianwei Zhang, Guizhen Tian, Sufang Wen, Zicheng He, Yan Wang   +6 more
doaj   +1 more source