Results 241 to 250 of about 43,903 (287)

Adaptive Under Frequency Load Shedding using PMU

2009 7th IEEE International Conference on Industrial Informatics, 2009
Under Frequency Load Shedding, UFLS, is the last step and the most extreme in protecting electric power systems from black outs and severe damages. Adaptive UFLS methods using df/dt are unreliable. SCADA is too slow to achieve a proper protection of the power system under severe over load condition.
Rasha M. El Azab, E. H. Shehab Eldin, M. M. Sallam   +2 more
openaire   +1 more source

Adaptive load shedding for windowed stream joins

Proceedings of the 14th ACM international conference on Information and knowledge management, 2005
We present an adaptive load shedding approach for windowed stream joins. In contrast to the conventional approach of dropping tuples from the input streams, we explore the concept of selective processing for load shedding. We allow stream tuples to be stored in the windows and shed excessive CPU load by performing the join operations, not on the entire
Buğgra Gedik, Kun-Lung Wu, Philip S. Yu, Ling Liu   +3 more
openaire   +1 more source

New Adaptive Decentralize Under Frequency Load-Shedding Algorithm

2020 15th International Conference on Protection and Automation of Power Systems (IPAPS), 2020
when there is a disturbance in the power grid, some power generator units are disconnected from the grid. The frequency starts to decrease. Therefore, multi-stage frequency relays are used in power grids. The most crucial issue with the conventional method is fixed setting; in the standard method available for such relays, various phenomena are ...
Mohammad Hosein Fazaeli, Mohammad Mostafa Keramat, Hashem Alipour, Naser Khodabakshi javinani   +3 more
openaire   +1 more source

New Centralized Adaptive Under Frequency Load Shedding Algorithms

2007 Large Engineering Systems Conference on Power Engineering, 2007
In this paper two centralized adaptive under frequency load shedding algorithms are proposed and analyzed. The objective of these methods is to simultaneously protect power systems against frequency instability as well as voltage instability, following combinational disturbances. After some events in power systems frequency starts to recover, while the
M. Sanaye Pasand, H. Seyedi
openaire   +1 more source

An adaptive load shedding method for intentional islanding

2009 International Conference on Clean Electrical Power, 2009
The paper proposes and analyzes a new adaptive load shedding method for intentional islanding for distribution networks. The proposed method uses a combination load shedding method to enhance both frequency and voltage stability following a disturbance.
Hirodontis, S., Li, H.
openaire   +1 more source

Low voltage microgrid islanding through adaptive load shedding

2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2017
The aim of this work is to propose an adaptive load shedding procedure for Microgrid application, designed for blackout prevention and frequency transient containment in case of Microgrid islanding. The goal of the adaptive load shedding algorithm is to define the minimal set of loads to be shed, able to maintain the electrical variables within defined
D'Agostino, F., Massucco, S., Silvestro, F., Fidigatti, A., Monachesi, F., Ragaini, E.   +5 more
openaire   +1 more source

An adaptive method for setting underfrequency load shedding relays

IEEE Transactions on Power Systems, 1992
An adaptive scheme is proposed for determining the amount of load to be shed by underfrequency relays based on the observed initial slope of the frequency deviation. following the system separation. This initial slope contains all the information required to estimate that size of the step change in load caused by the system separation and to forecast ...
P.M. Anderson, M. Mirheydar
openaire   +1 more source

A synchrophasor measurements based adaptive underfrequency load shedding scheme

2014 IEEE Innovative Smart Grid Technologies - Asia (ISGT ASIA), 2014
This paper presents a new Synchrophasor-assisted scheme for Underfrequency load shedding (Sy-UFLS) in the events of severe generation-load mismatch. Such a mismatch may pose a threat to the frequency stability of the power system. The proposed scheme focuses mainly on three aspects of load shedding, viz., when, how-much and where to shed the load.
M Prasad, K N Satish, null Kuldeep, Ranjana Sodhi   +3 more
openaire   +1 more source

Adaptive load shedding for an industrial petroleum cogeneration system

Expert Systems with Applications, 2011
Abstract This paper presents the design of adaptive load-shedding strategy by executing the artificial neural network (ANN) and transient stability analysis for an Industrial cogeneration facility. ► To prepare the training data set for ANN, the transient stability analysis has been performed to solve the minimum load shedding for various operation ...
Cheng-Ting Hsu, Hui-Jen Chuang, Chao-Shun Chen   +2 more
openaire   +1 more source

Adaptive Demand Limiting Control Using Load Shedding

HVAC&R Research, 1995
This paper presents a new algorithm for controlling the peak electrical demand in buildings below a target level through load shedding. The algorithm uses statistical methods to determine the load shedding requirements, without unnecessarily shedding loads.
openaire   +1 more source