Results 21 to 30 of about 34,712 (114)

On Stability of Voltage Source Inverters in Weak Grids

IEEE Access, 2018
As the number of inverters increases in the power grid, the stability of grid-tied inverters becomes an important concern for the power industry. In particular, a weak grid can lead to voltage fluctuations at the inverter terminals and consequently cause
Aswad Adib, Behrooz Mirafzal, Xiongfei Wang, Frede Blaabjerg   +3 more
doaj   +1 more source

Coordinated Control of Active and Reactive Power Compensation for Voltage Regulation with Enhanced Disturbance Rejection Using Repetitive Vector-Control

Energies, 2020
Voltage profile is one of many aspects that affect power quality in low-voltage distribution feeders. Weak grids have a typically high line impedance which results in remarkable voltage drops.
Felipe J. Zimann, Eduardo V. Stangler, Francisco A. S. Neves, Alessandro L. Batschauer, Marcello Mezaroba   +4 more
doaj   +1 more source

Reactive Power-Voltage Droop Gain Online Tuning Method of Photovoltaic Inverters for Improvement of Stable Output Power Capability in Weak Grids

Shanghai Jiaotong Daxue xuebao
The active power output capability and small signal stability in weak grids are key factors that limit stable photovoltaic (PV) power generation. To improve stably generating PV power in weak grids, an adaptive control method for PV inverters based on ...
WANG Yuyang, ZHANG Chen, ZHANG Yu, WANG Yiming, XU Po, CAI Xu
doaj   +1 more source

Overview on Transactive Energy—Advantages and Challenges for Weak Power Grids

Energies, 2023
This document lists some challenges that researchers face when implementing transactive energy in weak power grids. These challenges often include high voltage fluctuations, limited generation, high line loadability, and unbalanced grids.
Yuly V. Garcia, Oscar Garzon, Carlos J. Delgado, Jan L. Diaz, Cesar A. Vega Penagos, Fabio Andrade, Adriana C. Luna, J. C. Hernandez   +7 more
doaj   +1 more source

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

Enhanced voltage source converter control strategy for improved grid resilience: A 2DOF-PI approach

International Journal of Electrical Power & Energy Systems
This paper presents a control strategy for voltage source converters connected to weak grids. The proposed approach is based on slight modifications to the conventional vector current control strategy, including the use of two degrees of freedom ...
Carlos Díaz-Sanahuja, Ignacio Peñarrocha-Alós, Ricardo Vidal-Albalate, Agustí Egea-Àlvarez   +3 more
doaj   +1 more source

Power Production Losses Study by Frequency Regulation in Weak-Grid-Connected Utility-Scale Photovoltaic Plants

Energies, 2016
Nowadays, an increasing penetration of utility-scale photovoltaic plants (USPVPs) leads to a change in dynamic and operational characteristics of the power distribution system.
Jesús Muñoz-Cruzado-Alba, Christian A. Rojas, Samir Kouro, Eduardo Galván Díez   +3 more
doaj   +1 more source

Setpoint Feasibility and Stability of Wind Park Control Interactions at Weak Grids

Journal of Modern Power Systems and Clean Energy, 2022
The controllers of wind parks that are connected to weak grids can induce unstable oscillations near the fundamental frequency. Such phenomenon can be studied with equivalent impedances of the wind generators, which depend on their operational setpoints ...
Andres Arguello
doaj   +1 more source

Accurate Distinction of Weak and Strong AC Grids for Emerging Hierarchical-Infeed LCC-UHVDC Systems

CSEE Journal of Power and Energy Systems
Distinction of weak and strong AC grids for emerging hierarchical-infeed LCC-UHVDC systems is important for planning and operation departments. However, accuracy of earlier distinction methods is limited as they were developed by empirical reasoning ...
Hao Xiao, Xianzhong Duan, Yi Zhang
doaj   +1 more source

Impact of Synchronous Condensers on Small-Signal Stability of Offshore Wind Power Plants

IEEE Access
Grid-forming (GFM) converter control technology and synchronous condensers (SCs) have both been reported to improve the overall stability of a power system.
Sulav Ghimire, Kanakesh Vatta Kkuni, Emerson D. Guest, Kim H. Jensen, Guangya Yang   +4 more
doaj   +1 more source