The effect of line impedance compensation mode of series inverter along with the voltage regulation mode of shunt inverter of UPFC is investigated for transient stability improvement of Single Machine Infinite Bus System. Four control modes like perpendicular voltage or phase angle control etc have also been discussed. The effect of line impedance mode on critical clearing time with a three pha...

This paper addresses the problem of the fractional sliding mode control (FSMC) for a MEMS optical switch. The proposed scheme utilizes a fractional sliding surface to describe dynamic behavior of the system in the sliding mode stage. After a comparison with the classical integer-order counterpart, it is seen that the control system with the proposed sliding surface displays better transient per...

This paper addresses the problem of the fractional sliding mode control (FSMC) for a MEMS optical switch. The proposed scheme utilizes a fractional sliding surface to describe dynamic behavior of the system in the sliding mode stage. After a comparison with the classical integer-order counterpart, it is seen that the control system with the proposed sliding surface displays better transient per...

Today Transmission & Distribution network of power systems are very stressed due to growing demand of better quality of power at lower cost. As a result transmission networks are operating on high transmission levels. Transient stability, damping oscillations etc are the major operating problems that power engineers are confronting during transmitting power at high levels.Transient Stability in...

This paper examines the practical design issues of sliding mode controllers as applied to the control of DC– DC converters. A comprehensive review of the relevant literature is first provided. Major problems that prevent the use of sliding mode control in DC–DC converter for industrial applications and their possible solutions are discussed. Performance of sliding mode control is compared with ...

The hydraulic conductance (k) of shoots and root systems was measured using the transient and the dynamic modes of the high pressure flowmeter (HPFM). Measurements were conducted on Quercus robur and Fagus sylvatica plants grown on different substrates (forest soil, sand, Terra-green and vermiculite) and harvested at different times of the year. The values of k obtained by the transient mode we...

Multi-mode Cepheids pulsate simultaneously in more than one mode of oscillation. They provide an independent means to test stellar models and pulsation theories. can also be used derive metallicities. In recent years, the number known multi-mode has increased dramatically with discovery a large Galactic double-mode Cepheids. To date, 209 have been detected bulge disk, mostly based on Optical Gr...