Results 251 to 260 of about 2,070,998 (294)

Enhancing power system security control

IEEE Computer Applications in Power, 1997
This article presents a new concept for expanding the scope of power system security functions in an EMS control center, an approach which combines automatic learning applied to dynamic security analysis and a changeover of the conventional operator training simulator (OTS) into a dynamic OTS. Automatic learning is shown to be suitable for power system
openaire   +1 more source

Power system security by Corrective Switching

2010 IREP Symposium Bulk Power System Dynamics and Control - VIII (IREP), 2010
Limit violations may occur by power systems operation, such as: voltage level at buses, loadings of transmission lines and power transformers, etc‥ If violations are detected in the supervision process, corrective measures may be carried out in order to eliminate them or to reduce their intensity. Loading shedding is an extreme solution and should only
Manoel Firmino de Medeiros, Arrhenius Vinicius da Costa Oliveira   +1 more
openaire   +1 more source

Cyber security in power electronic systems

2021
Grid-connected power electronic converters are crucial technologies that allow the electrical grid to interface renewable energy sources, energy storage systems, electrical vehicles, microgrids, and high-voltage DC transmission lines. As the number of power electronic converters in modern grids continues to grow, their monitoring and coordinated grid ...
openaire   +2 more sources

Securing Electrical Power System Operation

2009
Automation in power systems has a very long tradition. Just recall the flyball governor in a steam engine and it becomes clear that power people have been using control principles and instruments for more than a century. There are, however, new challenges in power generation and transmission concerning the security and efficiency of those services that
openaire   +1 more source

Prediction of Power System Security Levels

IEEE Transactions on Power Systems, 2009
In the paper, Markov chains in conjunction with Monte Carlo simulation are used to predict the power system security level. The new approach uses a Markov chain for each identified security range to track the development of security level through time. Based on the forecasted and recorded data, the proposed procedure offers a useful tool to the system ...
Suad S. Halilcevic, Ferdinand Gubina, Andrej F. Gubina   +2 more
openaire   +1 more source

Real-time power system security classifier

Proceedings of the 1998 Second IEEE International Caracas Conference on Devices, Circuits and Systems. ICCDCS 98. On the 70th Anniversary of the MOSFET and 50th of the BJT. (Cat. No.98TH8350), 2002
In this paper, a "Real Time Power System Security Classifier" is presented. The classifier combines energy margin evaluations with simulations on the University of British Columbia's Real-Time Power System Simulator, as well as with fuzzy logic techniques for the decision making process.
M.P. de Arizon, J.R. Marti
openaire   +1 more source

Ensuring power system security against contingencies

2007 International Conference on Industrial and Information Systems, 2007
A power system is secure against a given contingency if it operates within acceptable operating limits before and after the occurrence of the contingency. In practice, it is not possible to secure a power system against all possible contingencies. Therefore, only the most critical contingencies (imminent disturbances) are considered. The paper gives an
U.D. Annakkage, B. Jayasekara
openaire   +1 more source

Security region analysis of power systems

6th International Conference on Advances in Power System Control, Operation and Management. Proceedings. APSCOM 2003, 2003
This paper introduces the concept of extended dynamic security region (EDSR) to characterize the transient stability of power systems. Roughly speaking, if the present state of power system lies in the EDSR, the system maintains stability after experiencing disturbance.
openaire   +1 more source

Security issues of power system interconnection

IEEE Power Engineering Society General Meeting, 2005, 2005
Voltage stability, transient stability and dynamic stability studies are three approaches to power system security studies. For evaluation of the synchronous interconnection of the African regional power pools interconnection, security issues should be taken care of before any economic analysis is done.
openaire   +1 more source

Security Modelling for Power System Reliability Evaluation

IEEE Transactions on Power Systems, 2001
This paper presents conceptual development, computation procedure and simulation results of the methodology for modelling security within reliability evaluation of power systems. The proposed approach takes into account activation of protection and automatic controls, local actions of operators, as well as centralized decisions taken by system ...
Levi, Victor, Nahman, Jovan, Nedic, Dusko P.   +2 more
openaire   +1 more source