Results 41 to 50 of about 3,762,663 (201)

Small Signal Model for VSC-HVDC Connected DFIG-Based Offshore Wind Farms

Journal of Applied Mathematics, 2014
Large-scale offshore wind farms are integrated with onshore ac grids through the voltage source converter based high voltage direct current (VSC-HVDC) transmission system. The impact on the stability of the ac grids will be significant.
Kai Liao, Zheng-you He, Bin Sun
doaj   +1 more source

Downlink Small-cell Base Station Cooperation Strategy in Fractal Small-cell Networks

, 2017
Coordinated multipoint (CoMP) communications are considered for the fifth-generation (5G) small-cell networks as a tool to improve the high data rates and the cell-edge throughput.
Bin, Fen, Chen, Jiaqi, Ge, Xiaohu, Xiang, Wei   +3 more
core   +1 more source

Dynamic interaction between synchronous machine and DC-power-modulated LCC in electromechanical timescale

The Journal of Engineering, 2018
Active power modulation of line-commutated converter (LCC)-based high-voltage direct current (HVDC) system is increasingly utilised, especially for the case of damping low-frequency oscillation associated with synchronous machine (SM) in ...
Jiazuo Hou, Shicong Ma, Xuan Gong, Jiabing Hu   +3 more
doaj   +1 more source

Very Degenerate Higgsino Dark Matter [PDF]

, 2016
We present a study of the Very Degenerate Higgsino Dark Matter (DM), whose mass splitting between the lightest neutral and charged components is ${\cal O}$(1) MeV, much smaller than radiative splitting of 355 MeV.
Chun, Eung Jin, Jung, Sunghoon, Park, Jong-Chul   +2 more
core   +1 more source

A Transient Damping Improvement Strategy for Enhancing Grid-Connected Active Power Response Performance of VSG

Energies
The given power and grid frequency disturbances can cause transient oscillations and steady-state deviations in the output power of a virtual synchronous generator (VSG), which can be effectively addressed by adding transient damping.
Yan Xia, Yang Chen, Renzhao Chen, Ke Li, Huizhu Li, Jinhui Shi, Yiqiang Yang   +6 more
doaj   +1 more source

Comprehensive Analysis and Design of Current-Balance Loop in Constant On-Time Controlled Multi-Phase Buck Converter

IEEE Access, 2020
Constant on-time (COT) controlled multi-phase buck converter has been widely used in high-current applications such as computing devices to achieve high entire-load-range efficiency.
Ching-Jan Chen, Zih-Yuan Zeng, Ching-Hsiang Cheng, Fu-To Lin   +3 more
doaj   +1 more source

Photovoltaic System with a Battery-Assisted Quasi-Z-Source Inverter: Improved Control System Design Based on a Novel Small-Signal Model

Energies, 2022
This paper deals with a photovoltaic (PV) system containing a quasi-Z-source inverter (qZSI) and batteries connected in parallel with the qZSI’s lower-voltage capacitor.
Ivan Grgić, Dinko Vukadinović, Mateo Bašić, Matija Bubalo   +3 more
doaj   +1 more source

Quasi-Electromechanical Oscillation Analysis of VSG Grid-Connected System Based on Small-Signal Model

IEEE Access
VSG is a pivotal control strategy for GFM, designed to enhance the damping and inertia of power systems, thereby bolstering their stability. Despite its benefits, VSG can induce a QEO due to dynamic interactions between the GFM and the power system. This
Shanshan Cheng, Haixin Wang, Zhe Chen, Songrui Jiang, Junyou Yang   +4 more
doaj   +1 more source

Design and Implement of Staggered Parallel Lithium Battery Equalization Converter With Jumper Switches

Frontiers in Energy Research, 2022
To mitigate the pressure on energy storage and enhance the flexibility of the power system, lithium-ion batteries are widely utilized in large-scale energy storage in smart grids due to their superior charging and discharging performance and energy ...
Xueqi Wang, Linlu Huang, Guanhua Chen, Zexiang Li   +3 more
doaj   +1 more source

Virtual Synchronous Generator Based Auxiliary Damping Control Design for the Power System with Renewable Generation

Energies, 2017
Aiming for large-scale renewable energy sources (RES) integrated to power systems with power electronic devices, the technology of virtual synchronous generator (VSG) has been developed and studied in recent years.
Bingtuan Gao, Chaopeng Xia, Ning Chen, Khalid Mehmood Cheema, Libin Yang, Chunlai Li   +5 more
doaj   +1 more source