Due to the massive increase of green energy, today’s power grids are in an ongoing transformation to smart grids. While traditionally ICT technologies were utilized to control and monitor only a limited amount of grid systems down to the station level, they will reach billions of customers in near future. One of the downsides of this development is the exposure of previously locked down communi...

Spatial Data Processing and Infrastructures are the core of future remote sensing and photogrammetry for the Earth Observation industry. For this to become an operational and production reality, quantum leap breakthroughs are to be achieved, concerning in particular image processing, error correlations, alert definitions, best usage practices, data encryption and code validation. Because proble...

In this expository article we will be primarily concerned with core aspects of Grids and Grid computing using OSS with some emphasis on utility computing. It is based on a technical report entitled 'Grid-Computing Using Linux' by the present author. Grids have made great progress in the area of scientific computing and collaboration projects in the recent past. They have also moved into the dom...

Operational and planning challenges caused by ever-increasing integration of electronically coupled renewable distributed energy resources (DERs) have become a reality all over the globe. These range from technical constraint violations to malfunctional setting coordination protective equipment inaccurate operational planning. Moreover, enable preconditions for high penetration DERs, utilities ...

Staggered grid Lagrangian schemes for compressible hydrodynamics involve a choice of how internal energy is advanced in time. The options depend on two ways of defining cell volumes: an indirect one, that guarantees total energy conservation, and a direct one that computes the volume from its definition as a function of the cell vertices. It is shown that the motion of the vertices can be defin...

One important aspect of modern critical infrastructures (CI) like power grids is that the control of the physical processes (e.g., electricity transmission) is no longer done locally but in a distributed way with SCADA/PCS systems. This distributed control is done over utility networks, typically wide-area IP networks, that interconnect the CI facilities (e.g., transformation substations). This...

abstract: in this paper a control scheme for grid-connected operation mode and the island state of distributed generation is presented. in normal conditions, every inverter dg system in micro-grids to supply a preset power, normally operate in a constant current control mode. when micro-grids removed from the network, dg inverter of each system must recognize the island and change position to v...

Low-Voltage (LV) distribution grids are facing a rapid increase of connected Photovoltaic (PV) power plants as well flexible consumers like Battery-Electric Vehicle (BEV) chargers and Heat Pumps (HPs). The coordinated operation these generation, storage consumption units, referred to Distributed Energy Resources (DERs), is regarded key requirement maximize the benefits renewable generation with...

With the capacity of achieving spectrum efficient wireless communications, cognitive radio enabled Advanced Metering Infrastructure (CR-AMI) networks are expected to enhance the efficiency and practicability of future smart grids. CR-AMI networks which has been recognized as a fundamental component of the smart grid ecosystem, are practically utilized as a static multi-hop wireless mesh network...

Smart grids are considered to replace traditional grids by adopting advanced technologies. Peak amounts would be an important future problem because of new devices such as electric cars, smart home appliances and the others with high-energy consumptions. In a smart grid environment, these problems should be eliminated. As a solution a management and control mechanism is required. In a smart gri...