Results 271 to 280 of about 332,517 (295)

Occurrence Probability and Prediction of Unintentional Islands Using Non Detection Zones

2019 IEEE Power & Energy Society General Meeting (PESGM), 2019
As a result of the increasing share of distributed generation in electric supply, the probability of unintentional electrical islands is also increasing. Unintentional islands occur when sub-grids with balanced active and reactive power are separated. Stable unintentional islands are hard to detect and pose a risk for normal grid operation as well as ...
Sebastian Palm, Peter Schegner
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Active Anti-Islanding technique with reduced Non-Detection Zone for Centralized Inverters

2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia), 2018
This paper presents an active anti-islanding scheme for grid-tied centralized inverters for large Photovoltaic (PV) power plants. The proposed technique involves appropriate reactive power injection into the grid which results in the positive/negative rate of change of frequency.
Prashant Jain, Vivek Agarwal, Bishnu Prasad Muni, Eswar Rao, Deepak Gehlot, S. Gautam Kumar   +5 more
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A Generic Method for the Determination of Non-Detection Zones in DER-Dominated Distribution Grids

2018 IEEE Power & Energy Society General Meeting (PESGM), 2018
Efficiently calculating non-detection zones (NDZ) becomes increasingly important when evaluating unintentional islanding risks of distribution grids that are highly integrated with distributed energy resources (DER). In this paper, a rigorous theoretical method, the DER-Driven Non-Detection Zone (D2NDZ), is presented to estimate NDZ for any given ...
Yan Li, Peng Zhang, Joseph N. Debs, David A. Ferrante, Donald J. Kane, Samuel N. Woolard, Roderick S. Kalbfleisch, Kenneth B. Bowes   +7 more
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Instability criterion to eliminate the Non-Detection Zone of the Sandia Frequency Shift method

2009 IEEE/PES Power Systems Conference and Exposition, 2009
Sandia Frequency Shift (SFS) islanding detection method is considered amongst the most efficient islanding detection methods that possesses small Non-Detection Zone (NDZ) for inverter based Distributed Generation (DG). The NDZ of the SFS depends to a great extent on its design parameters.
H. H. Zeineldin, S. Kennedy
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Three-dimensional Non-detection Zone for Assessing Anti-islanding Detection Schemes

Electric Power Components and Systems, 2010
Abstract The non-detection zone is a concept used to evaluate anti-islanding detection methods. The non-detection zone is defined as the loading condition for which an islanding detection method would fail to operate in a timely manner, and it is represented in terms of the load parameters.
Hatem H. Zeineldin, Ahmed Saif, Magdy M. A. Salama, A. F. Zobaa   +3 more
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The effect of different control modes and mixed types of DG on the non-detection zones of islanding detection

CIRED 2012 Workshop: Integration of Renewables into the Distribution Grid, 2012
Loss of mains protection (LOM) is among the most challenging issues related to the integration of distributed generation (DG). This paper presents simulation studies on the effect of multiple DG units on LOM protection. The results reveal an operational risk related to the active LOM detection methods.
Mäkinen Anssi, Raipala Ontrei, Järventausta Pertti, Repo Sami   +3 more
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A Novel Islanding Detection Method With Reduced Non-Detection Zones For Different Distributed Generation Units

2020 International Conference on Smart Grids and Energy Systems (SGES), 2020
In distribution system studies, Distributed Generation (DG) has become an important entity due to the power demand. The DG provides advantages such as improving the voltage profile, power loss reduction, increased power reliability, stability, and quality. The major issue that needs consideration is the islanded operation of the system.
Sowmya Ramachandradurai, Narayanan. K
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Reformative Arithmetic for Non Detection Zone Islanding Detection Based on the Voltage Shift Technique

Applied Mechanics and Materials, 2013
The quick & exact anti-islanding is a mandatory feature for grid-connected distributed generation system. The conventional passivity detection method has the biggish blind section and lower reliability, especially when the grid-connected inverter export power and burthen power are balanceable; the islanding detection often is disabled. And that the
Ji Hong Zhang, Pei Hong Yang, Zhen Kui Wu   +2 more
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Analysis on non-detection zone of the islanding detection in photovoltaic grid-connected power system

2011 International Conference on Advanced Power System Automation and Protection, 2011
Until now, there is a great development in photovoltaic grid-connected power system. In addition, there is an ongoing research on the problems existed in the system. Islanding of photovoltaic grid-connected power system have adverse impact on power quality and utility equipments, affecting the performance of the utility even worse, it may damage people'
YuGuo Fan, Chen Li
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Experimental Investigation on Non Detection Zones of Active Frequency Drift Method for Anti-islanding

IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society, 2007
The islanding effect of utility-interactive photovoltaic (UIPV) system may cause hazards for the grid equipment, and even danger to grid personnel. Therefore, reliable islanding detection is one of the crucial factors to connect grid for UIPV system. Over the years, a number of research works have been concentrated on the techniques of non-detection ...
Hui Wang, Furong Liu, Yong Kang, Jian Chen, Xueliang Wei   +4 more
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