Results 51 to 60 of about 2,611 (226)

Inrush current method of transformer based on wavelet packet and neural network

The Journal of Engineering, 2018
The transformer is an important equipment of power system; its operation state is directly related to the security and stability of the power system. Aiming at the problem that the differential protection of power transformer has been plagued by inrush ...
Wei Wang, Lin Yan, Tao Jin, Hong Liu, Fan Hu, Dongxun Wu   +5 more
doaj   +1 more source

Three-Phase Transformer Inrush Current Reduction Strategy Based on Prefluxing and Controlled Switching

IEEE Access, 2021
Inrush current with high amplitude is generated when the transformer is energized. On the one hand, it will have a negative impact on the safety of the transformer itself, and even cause the relay protection to malfunction.
Yuanlin Pan, Xianggen Yin, Zhe Zhang, Binyan Liu, Maolin Wang, Xin Yin   +5 more
doaj   +1 more source

Electronic suppression of transformer inrush currents

International Journal of Electrical Power & Energy Systems, 1988
Abstract A novel electronic technique for suppressing transformer inrush currents is outlined. The suppression concept is based on the generation of a time-expanding triggering signal controlling an electronic switch which is connected to the primary winding of the transformer.
El-Hosseiny T. El Shirbeeny, A.Y. Yakka
openaire   +1 more source

Nanoelectronic Detection of Opioids: Machine Learning‐Powered Screening With Carbon Nanotube Field‐Effect Transistor Sensor Array

Small, EarlyView.
A carbon nanotube field‐effect transistor (NTFET) sensor array is constructed to screen different opioids with machine learning models. Codeine, fentanyl, hydrocodone, and morphine are tested using the NTFET sensor array and classified with both conventional supervised learning models and deep learning models.
Zhengru Liu, Mehdy Dousty, Wenting Shao, Jieyu Wang, Samia Afrin, Wuqi Li, Ervin Sejdić, Alexander Star   +7 more
wiley   +1 more source

Inrush Current Control Circuit [PDF]

, 2002
An inrush current control circuit having an input terminal connected to a DC power supply and an output terminal connected to a load capacitor limits the inrush current that charges up the load capacitor during power up of a system.
Cole, Steven W.
core  

PRINCIPLES OF IMPLEMENTATION OF BLOCKING OF CURRENT PROTECTION OF ELECTRICAL POWER UNITS WITH TRANSFORMERS

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2017
Principles of implementation of current protection of elements of electric power systems with power transformers are considered. In some cases, in facilities with power transformers there could be an inrush of a magnetizing current that can cause a false
F. A. Romaniuk, A. G. Shapozhnikova
doaj   +1 more source

Two‐Stage Power Management for Triboelectric Nanogenerators: Toward Reliable and Efficient Self‐Powered Systems

Safety Science and Technology, EarlyView.
This review systematically outlines two‐stage power management circuits for TENGs, integrating AC–DC and DC–DC conversion to overcome high impedance and unstable output. It highlights strategies for efficient energy extraction and stable power delivery, enabling the development of reliable self‐powered systems for safety monitoring and applications in ...
Jiaxin Hu, Zhiyong Zhang, Haiyang Shao, Tianyu Shi, Baoling Yuan, Ming‐Lai Fu   +5 more
wiley   +1 more source

Study on the Time–Frequency Characteristics of Excitation Inrush Current and Its Induced Converter Transformer Vibration

Applied Sciences
An inrush current will be generated inside a converter transformer during no-load switching on or off. The inrush current will cause severe vibration of the winding and other components of the converter transformer.
Jinzhuang Lv, Zhanlong Zhang, Jun Deng, Zhicheng Pan, Heng Wu, Haibin Zhou, Wenhao He, Yu Yang   +7 more
doaj   +1 more source

Improved Capacitor Voltage Feedforward for Three-Phase LCL-Type Grid-Connected Converter to Suppress Start-Up Inrush Current

Energies, 2017
Three-phase active damping LCL-type grid-connected converters are usually used in distributed power generation systems. However, serious inrush current will be aroused when the grid-connected converter starts, especially in rectifier mode, if no ...
Shiying Zhou, Xudong Zou, Donghai Zhu, Li Tong, Yong Kang   +4 more
doaj   +1 more source

A Preventive Static Security Control Strategy for Distribution Networks Based on Phase Shifting Transformer Loop‐Closing Devices

IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
As the share of renewable energy in the energy mix continues to increase, the penetration of distributed renewable generation in distribution networks is also rising steadily. Loop‐closing operation provides an effective means to enhance renewable energy accommodation across different grid partitions.
Ningyu Zhang, Yuqiao Jia, Xun Huang, Yuxuan Huang, Xin Zhao, Shan Gao, Jinyang Li   +6 more
wiley   +1 more source