In this paper, effect of the islands number variation in restoration process is investigated and a graph based method for determination of optimum islands boundaries is presented. Also, the effect of number and location of black-start units on the restoration process is evaluated. In optimization process, objective function is minimizing Energy Not Supplied (ENS) and constraints are voltage mar...

We previously proposed a speech dereverberation method based on the modulation transfer function (MTF). This method consists of power envelope restoration and carrier regeneration processes, and reduces both the loss due to degraded power envelopes and the loss of speech intelligibility. In the power envelope restoration, however, whether adaptive time-frequency division provides the best repre...

Indicators of Quality of Service (QoS) of Fault Isolation and System Restoration (FISR) service, delivered by SCADA system are computed, discussed and correlated to quality indicators of power supplied to customers. In delivering FISR service, SCADA system, Telco network and Power grid act as a whole heterogeneous network. While SCADA system and Telco network can be well represented by means of...

Fast and reliable black start plays a key role in improving the ability of the power system to resist the risk of large-scale blackouts. For a black start with high voltage and long-distance transmission lines, it is much easier to cause phenomena such as self-excitation and power frequency/operating overvoltage, which may lead to black start failure and impact the reliability of the system’s r...

40. D. Morais, J. Rolim, and Z. Vale, DITRANS – A multi-agent system for integrated diagnosis of power transformers, Proc. of POWERTECH 2007, Lausanne, Switzerland, 2007. 41. R. Giovanini, K. Hopkinson, D. Coury, and J. Thorp, A primary and backup cooperative protection system based on wide area agents, IEEE Trans. Power Delivery, 21 (3): 1222– 1230, 2006. 42. J. Solanki, S. Khushalani, and N. ...

Carbon Monoxide (CO) is the most abundant air pollutant gas and accumulates rapidly to dangerous concentrations even in areas that seem to be well ventilated. Carbon monoxide detectors/alarm systems exist but people who are old, hearing impaired, partially sighted or heavy sleepers may not get the warning or find it difficult to wake up and get out in the event of dangerous concentration of CO ...

Early Modern Social and Economic History of Japan: The Tokugawa Legacy Post war historians of Japanese socio-economic history argued extensively in favor of a Japanese version of the Whig perspective on history in which practically everything in the Tokugawa early modern leads to the modern age of Japan as an indigenous and stable evolution. Many of us in the field who are dealing with the Toku...

this paper introduces an indirect adaptive fuzzy sliding mode controller as a power system stabilizer for damping local and inter-area modes of oscillations of multi-machine power systems. this controller is designed based on the combination of sliding mode controller and the fuzzy logic systems. the fuzzy systems are used to approximate the unknown functions of power system model. generator sp...