Results 1 to 10 of about 1,612,116 (295)

Hybrid Solar Forecasting Method Based on Empirical Mode Decomposition and Back Propagation Neural Network [PDF]

E3S Web of Conferences, 2021
In order to improve the accuracy of solar radiation prediction and optimize the energy management system. This study proposes a forecasting model based on empirical mode decomposition (EMD) and Back Propagation Neural Network (BPNN).
Aghmadi Ahmed, El Hani Soumia, Mediouni Hamza, Naseri Nisrin, El Issaoui Fatima   +4 more
doaj   +1 more source

Optimal Configuration of Photovoltaic-wind-storage Microgrid for Agricultural Irrigation in Mountainous Areas [PDF]

E3S Web of Conferences, 2021
Water and electricity supply for irrigation is difficult in remote mountainous areas. This paper explores agricultural irrigation systems’ integration mechanism, pumped storage power plants, and renewable power sources in mountainous areas to solve this ...
Zhang Yangyang, Li Bin, Deng Youxiong, Lian Chunjie, Wang Jingde   +4 more
doaj   +1 more source

A Dynamic Nonlinear VDCOL Control Strategy Based on the Taylor Expansion of DC Voltages for Suppressing the Subsequent Commutation Failure in HVDC Transmission

Energies, 2023
Subsequent commutation failure in high-voltage DC transmission systems seriously emphasizes the safe and stable operation of power systems. Via analyzing the mechanism of commutation failure and the principle of voltage-dependent current order limiter ...
Hongzheng Li, Kunlun Han, Shuhao Liu, Hailin Chen, Xiongfeng Zhang, Kangtai Zou   +5 more
doaj   +1 more source

A Two-Terminal Directional Protection Method for HVDC Transmission Lines of Current Fault Component Based on Improved VMD-Hilbert Transform

Energies, 2023
The traveling wave protection of high voltage direct current (HVDC) transmission lines is susceptible to the influence of transition resistance. As a backup protection, current differential protection has absolute selectivity, but usually requires an ...
Shuhao Liu, Kunlun Han, Hongzheng Li, Tengyue Zhang, Fengyuan Chen   +4 more
doaj   +1 more source

Investigation on Formation Mechanisms of Methanol During Cellulose Insulation Aging Based on Molecular Dynamics Simulation

IEEE Access, 2021
In recent years, methanol has been proposed as a chemical indicator to assess the aging condition of cellulose insulation in oil-immersed power transformers. However, the formation mechanisms of methanol during cellulose degradation are not clear enough.
Jiefeng Liu, Huan Zhao, Xianhao Fan, Yiyi Zhang   +3 more
doaj   +1 more source

Normalization for FDS of Transformer Insulation Considering the Synergistic Effect Generated by Temperature and Moisture

IEEE Access, 2020
Frequency domain spectroscopy (FDS) technique is widely applied in the condition assessment of the oil-paper system in power transformers. However, the synergistic effect generated by moisture and temperature on the FDS data cannot be analyzed by the ...
Xianhao Fan, Shichang Yang, Lai Benhui, Jiefeng Liu, Yiyi Zhang, Zixiao Wang   +5 more
doaj   +1 more source

An Experimental Study of the Effect of High Electric Field on Mass Transfer Enhancement [PDF]

Journal of Petroleum Science and Technology, 2012
Applying corona wind as a novel technique can lead to a great level of heat and mass transfer augmentation by using a very small amount of energy.
R. Karami, M. Ayazi, L. Samiee,, M. Dehghani Mobarake, F. Goodarzvand-chegini   +4 more
doaj   +1 more source

A Novel Curve Database for Moisture Evaluation of Transformer Oil-Immersed Cellulose Insulation Using FDS and Exponential Decay Model

IEEE Access, 2020
In recent decades, moisture evaluation of transformer oil-immersed cellulose insulation has been widely studied by using the frequency domain spectroscopy (FDS) technique.
Jiefeng Liu, Zixiao Wang, Xianhao Fan, Yiyi Zhang, Jiaqi Wang   +4 more
doaj   +1 more source

Kubernetes-Container-Cluster-Based Architecture for an Energy Management System

IEEE Access, 2021
This paper proposes an energy management system (EMS) architecture based on the Kubernetes container cluster to solve the problem of traditional EMSs being unable to simultaneously achieve high reliability and high resource utilization. Container cluster
Zongsheng Li, Hua Wei, Zhongliang Lyu, Chunjie Lian   +3 more
doaj   +1 more source

Two terminals protection method for HVDC transmission lines based on maximal overlap discrete wavelet transform and cross-correlation coefficient of traveling wave

Energy Reports, 2023
This study presents a novel method of HVDC protection based on the maximal overlap discrete wavelet transform (MODWT) and the kurtosis of cross correlation coefficient.
Tengyue Zhang, Kunlun Han, Hongzheng Li, Shuhao Liu, Fengyuan Chen   +4 more
doaj   +1 more source