Results 41 to 50 of about 791,080 (196)

Power-Synchronized Grid-Following Inverter Without a Phase-Locked Loop

IEEE Access, 2021
This paper proposes a power-synchronized control strategy for grid-following inverters (GFLIs) to regulate their power exchange with the grid without any need for sensing/regulating the point of connection voltage.
Behrooz Bahrani
doaj   +1 more source

The transient instability mechanism and stability‐enhanced LVRT control for VSC riding‐through severe grid voltage sag

IET Renewable Power Generation, 2023
As the grid‐connected interface device of wind and photovoltaic power generation, the voltage source converter (VSC) must pass the low voltage ride‐through (LVRT) test. However, existing literature demonstrates that under weak grid conditions, there is a
Huiqiang Sun, Xinchun Lin, Guangzhou Huang, Jiayan Zhang, Dan Liu, Kezheng Jiang, Yong Kang   +6 more
doaj   +1 more source

Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid

Energies, 2022
In a distributed generation system, the all-pass-filter phase-locked loop (APF-PLL) is a commonly used method for grid synchronization. However, the coupling effect between APF-PLL and current control loop increases the risk of oscillation instability ...
Longyue Yang, Tian Cao, Huapeng Chen, Xinwei Dong, Shuyuan Zhang   +4 more
doaj   +1 more source

Mathematical model of grid‐connected inverter system in weak grid

Electronics Letters, 2015
Impedance‐based analysis is widely used to study the grid‐connected inverter system in a weak grid. The advantage of the analysis is that without knowing the accurate parameters of an inverter, its equivalent output impedance can be obtained by specific methods (e.g. the specific harmonic injection method) to investigate the system'
Haoran Li, Jinbin Zhao, Xuhong Yang
openaire   +1 more source

Estimates of Stellar Weak Interaction Rates for Nuclei in the Mass Range A=65-80 [PDF]

, 2002
We estimate lepton capture and emission rates, as well as neutrino energy loss rates, for nuclei in the mass range A=65-80. These rates are calculated on a temperature/density grid appropriate for a wide range of astrophysical applications including ...
Fuller, George M., Pruet, Jason
core   +3 more sources

The Routing of Complex Contagion in Kleinberg's Small-World Networks

, 2016
In Kleinberg's small-world network model, strong ties are modeled as deterministic edges in the underlying base grid and weak ties are modeled as random edges connecting remote nodes.
D Centola, D Easley, D Kempe, DJ Watts, GJ Baxter, J Adler, J Balogh, J Balogh, J Chalupa, M Granovetter, M Granovetter, ME Newman, MEJ Newman, MS Granovetter, R Motwani, S Milgram   +15 more
core   +1 more source

Selection of the SIM Astrometric Grid [PDF]

, 2002
We investigate the choice of stellar population for use as the Astrometric Grid for the Space Interferometry Mission (SIM). SIM depends on the astrometric stability of about 2000 stars, the so called Grid, against which the science measures are ...
Liu, Y., Peterson, D. M., Zwart, S. Portegies   +2 more
core   +3 more sources

Sliding Mode Observer-Based Phase-Locking Strategy for Current Source Inverter in Weak Grids

Energies
The current source inverter (CSI) has become the main grid-connected interface of distributed generation systems due to its advantages, such as boost capability, current controllability, and short-circuit protection capability.
Yubin Zheng, Hui Deng, Xiong Liu, Yuanpeng Guan   +3 more
doaj   +1 more source

Analysis of Persistent Oscillation Mechanism and Low Frequency Coupling Characteristics of Power System From the Perspective of Grid-Connected Converter

IEEE Access, 2021
The voltage disturbance in the weak grid will cause frequency coupling and even persistent oscillation of the grid current of grid connected converter in power system.
Qi Wang, Xingyong Zhao, Peng Wang
doaj   +1 more source

Magnetically controlled reactors design for weak grids

Ain Shams Engineering Journal, 2021
يتطلب نظام الطاقة (PS) أنظمة نقل تيار متردد مرنة جديدة، وحلول جديدة لمشاكل عدم استقرار الجهد مع تصميم بسيط واستجابة سريعة ومعداته، يجب أن تسمح بالتحكم التفاعلي، وسعة الدائرة القصيرة، والسلوك الديناميكي، والمرونة والمزيد من التحكم في الكفاءة للشبكة المرتبطة بالموثوقية والأمان. يطور هذا البحث تصميم مفاعل يتم التحكم فيه مغناطيسيًا (MCR) لنظام ضعيف.
Ricardo Manuel Arias Velásquez, Jennifer Vanessa Mejía Lara   +1 more
openaire   +2 more sources