Harmonics have become an important issue in modern power systems. The widespread penetration of non-linear loads to emerging power systems has turned power quality analysis into an important operation issue under both steady state and transient conditions. This paper employs a Dynamic Harmonic Domain (DHD) based framework for dynamic harmonic analysis of VSC-HVDC systems. These systems are wide...

in the past decade, paying attention to the vertical fliers has been noted by most of the scientist and researchers, because of their exclusive features. The special capabilities of these, reducing radar identifier, low risk for human life, no restrictions on size and uses such as photography, survey, press coverage, checking, power lines, meteorological analysis, traffic, monitoring, in urban ...

abstract prediction of input flow into water resources is regarded as one of the most important issues in optimum planning and management in producing electro-water energy and optimum allocation of water into different consumption sources. different parameters affect on input discharge into dams. climate variables including temperature and rainfall have the most effect on input runoff rate to w...

n this paper, a mathematical model has been derived to predict the granulation time of anaerobic sludge in UASB reactors. In the proposed model, some physical, chemical and biological parameters affecting the granulation phenomena have been considered. To validate the model, 12 pilot-scale experiments in 4 UASB reactors are carried out and the results are discussed here. The reactors are starte...

the first motive for the determination and evaluation of an energy productionsystem is the need to change. such system is dynamic in nature and is influenced bymany factors such as age and physiological status of individual sheep or goat, quantityand quality of available feed and environment including the management systems.traditional pastoral resource assessments do not always account for the...

The intent of this research is to do studies on these HVDC lines and to determine if they improve dynamic performance. In attempting to do so, tools such as PSS/E and a MATLAB based tool, PSAT, will be used to construct multiterminal HVDC models on an IEEE 9-bus system and an IEEE 14-bus system. While studying the IEEE 9-bus system, a comparison will be done to see whether using HVDC lines will...

We introduce an eecient and robust spatial index to support a set of diier-ent queries, which is developed from G unther's Celltree 6 and the Monotonous Bisector Tree 11;16. In practice, huge scenes are manageable by using the paging{concept. For convex polyhedrons in N{dimensional real space and any L p {metric (1 p 1) we are able to show that the C-tree can be constructed in time O(n log n), ...

The possible worlds model and its associated Kripkean semantics provide an intuitive semantics to epistemic logics, but they seem to commit us to model agents which are logically omniscient and perfect reasoners. In this article we show that this is not necessarily the case, if possible worlds are not considered as consistent descriptions of the real world. We propose to model the beliefs of an...