Multiple failures of transmission lines caused by climatic/atmospheric impact plague many electric power systems. Direct damage from such is quite huge, yet it marginal compared with the social reduction in supply electricity. As not economical to construct weatherproof lines, preventive actions should be employed most effective restoration, or reduce restoration time. A working group CIGRÉ (WG...

abstract this study is an attempt to investigate the influence of targeting subsidies on price transmission pattern in iran's egg market. the targeting subsidies plan was imposed by 20 december 2010. using of daily price time series data, the study was conducted during december 2009 to october 2011. using ecm model, price transmission models were estimated for the two periods (e.g. before and a...

a few of the presented soil behavior models are capable of predicting the triggering and post liquefaction and also shear band mechanism through the soil media. the assessment of earth-dam body behavior as a soil structure made of cohesive soil in core and non-cohesive soil as the core supports, including water interaction at upstream through earthquake upon a multi-line constitutive equations ...

This paper describes a computer model for calculating the surge propagation in the winding of electrical machines. The model considers the winding as a combination of a multiconductor transmission line and a network of lumped parameters. The frequency dependence of the winding electrical parameters are calculated and incorporated into the analysis by means of Foster and Cauer circuits. Finally,...

This paper presents the modeling of highly nonlinearcircuits using a total-variation-decreasing (TVD) differencescheme developed for the simulation of problems involving shockphenomena. In contrast to the commonly used leapfrog scheme,a second-order accurate TVD method based on the Lax–Wen-droff scheme is applied to one-dimensional nonlinear transientelectromagnetic-wave...

This work investigates the effects of the STATCOM (Static Synchronous Compensator), a FACTS (Flexible AC Transmission Systems) device, on small-signal power system angle stability. This investigation is carried out for a single machine connected to an infinite bus via a loss-less transmission line. The study is based on investigation of the eigenvalues of the linearized power system model in th...

Notes by ChangHoon Lim 1. Warburg impedance for semi-infinite oscillating diffusion Warburg (Ann. Physik. 1899) is credited with the first solution to the diffusion equation with oscillating concentration at the boundary, which is related to the diffusional (or mass transfer) impedance of electrochemical systems. An interesting point made in the first part of the class is that the very same mat...

The analogy between the FDTD Yee cell and a transmission-line network is invoked for the derivation of a scheme that lends itself to the implementation of a negative refractive index medium. Electric and magnetic currents, incorporated in the update equations, represent series capacitors and shunt inductors, which load the implicitly present transmission line network of an FDTD grid in a way th...