Results 1 to 10 of about 4,429,371 (198)

Energy-efficiency improvements for optical access [PDF]

IEEE Communications Magazine, 2014
This article discusses novel approaches to improve energy efficiency of different optical access technologies, including time division multiplexing passive optical network (TDM-PON), time and wavelength division multiplexing PON (TWDM-PON), point-to ...
Anthapadmanabhan, P, Chow, H, Kanonakis, K, Lannoo, Bart, Lee, K-L, Saliou, F, Suvakovic, D, Vetter, P, Yin, Xin   +8 more
core   +3 more sources

Assessing small hydropower sites in Nigeria for sustainable development using ArcGIS

Energy Reports, 2023
This paper focuses on the prospects of small hydropower plants (SHP) in Nigeria and utilizes ArcGIS software for analyzing the country’s hydropower energy potential.
Benneth Oyinna, Kenneth E. Okedu, Ogheneruona E. Diemuodeke, Lois E. David, Isaac O. Negedu, Elijah A. Osemudiamen, Ilhami Colak, Akhtar Kalam   +7 more
doaj   +1 more source

Modeling and frequency characteristic analysis of DSOGI-PLL in dq reference frame

Energy Reports, 2021
Dual second-order generalized integrator phase-locked loop (DSOGI-PLL) is widely used in grid-connected system for grid synchronization because of its simple implementation and good filtering capability.
Yongxin Zhang, Fei Li, Liuchen Zhang, Shiquan Wen, Mingyao Ma, Xing Zhang   +5 more
doaj   +1 more source

An impedance identification-based islanding detection method for droop control inverters based on RDFT and positive–negative notch filters

Energy Reports, 2022
Droop control inverters are widely used because of their plug-and-play characteristics, no need for communication, and adaptability to weak power grids.
Zixuan Guo, Xing Zhang, Qiaodi Chen, Mingda Wang, Ming Li, Hanyu Wang   +5 more
doaj   +1 more source

Control and capacity planning for energy storage systems to enhance the stability of renewable generation under weak grids

IET Renewable Power Generation, 2022
Current‐controlled inverters (CCIs), often used in renewable power generation, are prone to harmonic instability under weak grids with a low short‐circuit ratio (SCR). This paper proposes that this type of instability can be prevented by configuring part
Zixuan Guo, Xing Zhang, Ming Li, Hanyu Wang, Feng Han, Xinxin Fu, Jilei Wang   +6 more
doaj   +1 more source

Quantitative damping reshaping method based on equivalent RLC circuits using an active damper

IET Power Electronics, 2023
Large scale power electronic converters in renewable energy power system (REPS) constitute a complex multi‐scale high‐order non‐linear network. Harmonic amplitude amplification of specific frequency (e.g.
Fei Li, Qiang Feng, Yichao Wang, Hanyu Wang, Mingyao Ma, Xing Zhang   +5 more
doaj   +1 more source

Research on HIL-based HVRT and LVRT automated test system for photovoltaic inverters

Energy Reports, 2021
As an important capability of the photovoltaic grid-connected inverter, high voltage ride-through (HVRT) and low voltage ride-through (LVRT) capability are related to the stability of the whole power grid system.
Fei Li, Mengtao Liu, Yingfeng Wang, Xing Zhang   +3 more
doaj   +1 more source

Active power reserve photovoltaic virtual synchronization control technology

Chinese Journal of Electrical Engineering, 2020
The photovoltaic virtual synchronous generator (PV-VSG) solves the problem of lack of inertia in the PV power-generation system. The existing PV plants without energy storage are required to participate in the power grid's frequency modulation (FM), but ...
Xing Zhang, Qian Gao, Yuhua Hu, Haizheng Zhang, Zixuan Guo   +4 more
doaj   +1 more source

Reconfiguration modulation strategy analysis for proactive adaptability of the monitored inverter to on-line monitoring system of IGBT modules

Energy Reports, 2020
To realize on-line monitoring for insulated-gate bipolar transistor (IGBT) modules in the three-level neutral point clamped (NPC) inverters, a reconfiguration modulation strategy is proposed.
Mingyao Ma, Weisheng Guo, Mingyue Zhan, Shuying Yang, Fei Li   +4 more
doaj   +1 more source

Analysis of online impedance measurement range based on voltage disturbance injection

Energy Reports, 2020
The harmonic injection method is often used to measure the impedance of grid-connected inverter, which is necessary for impedance-based stability analysis of grid-connected systems.
Fei Li, Jintao Wu, Yao Huang, Yongxin Zhang, Xing Zhang, Mingyao Ma   +5 more
doaj   +1 more source