Results 21 to 30 of about 352,699 (219)

Investigation on Diffusion Mechanisms of Methanol in Paper/Oil Insulation Based on Molecular Dynamics Simulation

IEEE Access, 2021
Methanol is regarded as an available indicator to analyze the aging condition of cellulose insulation. However, the diffusion mechanism of methanol molecules in the paper-oil insulation system is still unclear, since it cannot be explored by using only ...
Xianhao Fan, Huan Zhao, Tengyue Sun, Jiefeng Liu, Yiyi Zhang, Yubo Zhang   +5 more
doaj   +1 more source

A hybrid physical-data approach for solving dynamic optimal power flow considering uncertainties and different topology configurations

Energy Reports, 2023
The security and economy of power system operation or planning are threatened by various uncertain factors, including the unpredictability of renewable energy, the variation of topology configurations, and significant load fluctuation.
Liqin Zheng, Xiaoqing Bai, Zonglong Weng, Yujing Jia   +3 more
doaj   +1 more source

Storage capacity allocation strategy for distribution network with distributed photovoltaic generators

Journal of Modern Power Systems and Clean Energy, 2018
Distributed photovoltaic generators (DPGs) have been integrated into the medium/low voltage distribution network widely. Due to the randomness and fluctuation of DPG, however, the distribution and direction of power flow are changed frequently on some ...
Bin LI, Xingchen LI, Xiaoqing BAI, Zhineng LI   +3 more
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Optimal Placement of Fault Indicator and Sectionalizing Switch in Distribution Networks

IEEE Access, 2020
Distribution network automation is considered by power supply companies as an effective investment strategy to improve reliability and service quality. Switching devices and protective devices play an important role in the distribution automation system (
Bin Li, Jie Wei, Yufan Liang, Biyun Chen
doaj   +1 more source

Research on Predicting Line Loss Rate in Low Voltage Distribution Network Based on Gradient Boosting Decision Tree

Energies, 2019
Line loss rate plays an essential role in evaluating the economic operation of power systems. However, in a low voltage (LV) distribution network, calculating line loss rate has become more cumbersome due to poor configuration of the measuring and ...
Mengting Yao, Yun Zhu, Junjie Li, Hua Wei, Penghui He   +4 more
doaj   +1 more source

Evolution of Virtual Water Transfers in China’s Provincial Grids and Its Driving Analysis

Energies, 2020
In China, electricity transmission has increased rapidly over the past decades, and a large amount of virtual water is delivered from power generation provinces to load hubs.
Yiyi Zhang, Shengren Hou, Jiefeng Liu, Hanbo Zheng, Jiaqi Wang, Chaohai Zhang   +5 more
doaj   +1 more source

Optimization of Flue Gas Desulphurization Technologies Based on Cloud Model and Kernel Vector Space Model

IEEE Access, 2019
The flue gas desulfurization of coal-fired power plants is currently the main mean to control the emission of sulfur dioxide in China. How to select desulfurization technology that meets both technical and economic requirements becomes the issue of this ...
Yiyi Zhang, Yang Li, Jiefeng Liu, Hanbo Zheng, Chaohai Zhang, Ruqi Li, Haoyi Su, Junhui Zhao   +7 more
doaj   +1 more source

Multi-Time-Scale Rolling Optimal Scheduling of Virtual Power Plants in Energy and Flexible Ramping Product Markets

Energies, 2023
Virtual power plants (VPPs) offer a feasible solution for integrating various types of distributed energy resources (DERs) into the power grid in the electricity market. This paper proposes a multi-time-scale rolling optimal scheduling for VPPs, enabling
Xiaoqing Shi, Xiaoqing Bai, Puming Wang, Qinghua Shang   +3 more
doaj   +1 more source

A Resilience Enhancement Model for Complex Distribution Network Coupling with Human Resources and Traffic Network

Complexity, 2021
Resilience is the ability of a system to withstand and recover from deliberate accidents; as to distribution systems, it means the ability to withstand and recover from natural disasters or other serious accidents and ensure electricity supply. Generally,
Biyun Chen, Yumo Shi, Yanni Chen
doaj   +1 more source

Numerical Studies on the Performance of the PCM Mesh-Finned Heat Sink Base on Thermal-Flow Multiphysics Coupling Simulation

Energies, 2020
Operating temperature is an important parameter of thyristors to ensure the stable operation of power electronic devices. Thermal management technology is of great significance for improving the reliability of thyristors.
Jiefeng Liu, Shangxin Yu, Shichang Yang, Yiyi Zhang, Xianhao Fan, Bing Gao   +5 more
doaj   +1 more source