The electric power distribution grid is directly oriented to the majority of ordinary users. Traditional operation and maintenance are performed mainly based on experience, which disable rationally evaluate status line predict faults. Based big data, risk evaluated through principal component analysis in this paper, so that a machine learning algorithm carried out calculate value unit. Finally,...

The Smart Grid is not just about the digitalization of the Power Grid. In its more visionary acceptation, it is a model of energy management in which the users are engaged in producing energy as well as consuming it, while having information systems fully aware of the energy demand-response of the network and of dynamically varying prices. A natural question is then: to make the Smart Grid a re...

conventional passive distribution networks are changing to modern active distribution networks which are not radial. conventional load flow methods should be modified for new distribution networks analysis. in modern distribution networks distributed generation (dg) units are embedded with conventional and/or renewable resources. dg units are generally modeled as pv or pq nodes which inject ...

Techniques are presented for distributing grid points on parametric surfaces and in volumes according to a speci ed distribution of arc length. Interpolation techniques are introduced which permit a given distribution of grid points on the edges of a three-dimensional grid block to be propagated through the surface and volume grids. Examples demonstrate how these methods can be used to improve ...

One of the key protection functionalities in the future active distribution networks will be reliable detection of islanding. Non-detection zone (NDZ) near a power balance situation and maloperation due to other network events have been the major challenges with traditional passive islanding detection methods like voltage, frequency, rate-ofchange-of-frequency, voltage vector shift (VVS). Howev...

A grid method for measuring the shape and strain distribution of 3D objects by using the Fourier transform grid method is presented. In the conventional automated grid method, the position of a line is expressed in an integer, so it is difficult to analyze the accurate position. Using this twodimensional Fourier transform grid method the fault can be overcome by analyzing and interpolating the ...

Distribution grid is the medium and low voltage part of a large power system. Structurally, the majority of distribution networks operate radially, such that energized lines form a collection of trees, i.e. forest, with a substation being at the root of any tree. The operational topology/forest may change from time to time, however tracking these changes, even though important for the distribut...