This paper presents the effect of preload on static and dynamic performance characteristics of several gas-lubricated noncircular journal bearing configurations. The linearized system approach using finite element method is used to obtain both steady state and dynamic characteristics. The results of the investigation shows that preload has a significant effect on frictional power loss and the ...

With the development of restructured power systems and increase of prices in some hours of day and increase fuel price, demand response programs were noticed more by customers. demand response consists of a series of activities that governments or utilities design to change the amount or time of electric energy consumption, to achieve better social welfare or some times for maximizing the benef...

This paper proposes a novel approach for generation scheduling using sensitivitycharacteristic of a Security Analyzer Neural Network (SANN) for improving static securityof power system. In this paper, the potential overloading at the post contingency steadystateassociated with each line outage is proposed as a security index which is used forevaluation and enhancement of system static security....

background: in recent years, the concept of health security has received an international dimension. however, despite evident links between health and security the concept of health security is not used in either academic or political discourse in serbia. it comes as no surprise then that even though the issue of security challenges is present in serbian legislation, it has not been incorporate...

in this paper, the performance of two types of facts devices in order to enhance the power system static voltage stability has been investigated. these devices include static var compensator (svc) and thyristor controlled series capacitor (tcsc). the modeling of the single machine infinite bus (smib) and aforesaid devices has been made up in steady state mode with disregarding of the generator ...

hyrcania (gorgan) has long attracted men of power due to its strategic and economic location. according to historical evidence, the iranian governments before the sassanid dynasty, attempted to dominate the region in order to consolidate their power. the sassanid dynasty, following the same policy of the former dynasties, not only established an important military base there but also constructe...

The current U.S. electrical power grid is an out-of-date infrastructure, and the Smart Grid is an upgrade that will add many new functionalities to meet customers’ new power requirements. Updating a system as complex as the electrical power grid has the potential of introducing new security vulnerabilities into the system. This document presents a review of the work related to Smart Grid cyber ...