نتایج جستجو برای ' UES '

The energization of long transmission lines can cause high overvoltage stresses not only along the transmission line, but also in the rest of the network. The traditional method of limiting switching overvoltages to acceptable levels is the use of circuit breakers equipped with pre-insertion resistors. The present paper describes a study comparing this traditional method with two other alternatives for the limitation of switching overvoltages during line energization in an actual ...

Reliability evaluation of a large composite power system involves the consideration of numerous outage events and consequently extensive calculations. Therefore, applying justifiable simplifications such as the determination of an equivalent networks can be very useful in reliability evaluation of large systems. This paper presents a review of procedures which are directly or indirectly applicable to the determination of composite system adequacy equivalents. Following a brief dis...

This article deals with use of advanced multivariate statistical techniques for prediction of compressive strength of concrete using ingredients proportions. The parameters representing the concrete are normally highly correlated. Different multivariate statistical techniques appropriate for analysis of multicollinear data are discussed, and efficiency of stepwise regression in analyzing multicollinear data set was investigated. Principal component regression was used to analyse t...