Given a planar compact set Ω where a weakly admissible mesh (WAM) is known, we compute WAMs and the corresponding discrete extremal sets for polynomial interpolation on solid (even truncated) cones with base Ω (with pyramids as a special case), and on solids corresponding to the rotation of Ω around an external coplanar axis by a given angle. 2000 AMS subject classification: 41A10, 41A63, 65D05.

<p>In the prevailing open-access environment, one of limitations for power exchanges has been voltage stability. The study stability necessitates a complete network representation. In this paper, advantage dynamic behavior generators is considered by incorporating models generators. It shown resulted in more accurate results compared to conventional PV buses or ideal source that are used ...

This paper presents the application of fuzzy logic PID secondary voltage control to Egyptian power system model. The study included tertiary control, Wide Area Measurement System (WAMS) configuration, a selection pilot buses, and improve performance. was applied using coordinated controller, reactive integral Automatic Voltage Regulators (AVRs), regional generators. implemented based on optimal...

State estimation (SE) is an essential tool of energy management systems (EMS), providing power system operators with overall grasp the actual operating conditions and aiding them in sustaining reliable secure operation grid. In modern transmission sectors, two main measurement are deployed, namely supervisory control data acquisition (SCADA) wide area monitoring (WAMS). The multiple advantages ...

Power system oscillation damping remains as one of the major concerns for secure and reliable operation of large power systems, and is of great current interest to both industry and academia. The principal reason for this is that the inception of poorly-damped low-frequency inter-area oscillations (LFIOs) when power systems are operating under stringent conditions may lead to systemwide breakup...