Since energy use is a type of consumer behavior reflecting the interests to maximize some objective function, the human being activities seen in energy terms might be used to create the social aggregations or groups. Electric energy generated from ecologic sources brings some unpredictability. Authors model the unpredictability of the distributed generation in order to create a tool for minimiz...

The integrated concept ADRES shall point out the future of energy supply using intelligent, regenerative and efficient energy systems (Autonomous Decentralized Regenerative Energy Systems – ADRES). Via combination of regenerative energy sources, intelligent grid management and highest efficiency in the entire energy chain, especially in innovative end use appliances, a regional low emission ful...

Few years ago Power Systems consisted mainly of large generation plants supplying distant loads through the utility grids. The last years, though, a number of factors lead this structure to change gradually. Small generators of some MW have been already dispersed (DGs) throughout the transmission grid. The distribution of smaller generation units throughout the distribution system as near as po...

Energy is a precious societal resource, and increasingly rated for its ‘quality’ or lack thereof as a contributor to greenhouse gases (GHGs). Modern electrical energy systems operate at the intersection of technological advances in microelectronics, communications, and control. From individual components and systems such as computer systems to their aggregates and enclosures such as data center...

With advances in solid-state power electronic devices and microprocessors, various pulse-width-modulation (PWM) techniques have been developed for industrial applications. This paper presents the comparison of two different PWM techniques, the sinusoidal PWM (SPWM) technique and the space-vector PWM (SVPWM) technique applied to two level VSI for micro grid applications. These two methods are co...

National Laboratory is an equal opportunity employer. SUMMARY Although it has slowed considerably, consumption of electricity continues to grow in developed economies. Further, there are some unknowns which might accelerate this growth, such as electrification of vehicle fleets and geothermal heat pump space and water heating. Most analysts anticipate that distributed energy resources (DER) wil...

Facing the recent growing concern about the environment and electric power crisis triggered by the Great East Japan Earthquake, efficient use of energy has become an important issue. A smart grid that is a next-generation electric power network is expected to be one of the solutions and to form an enormous market. Aiming to enter this new smart grid market, Sumitomo Electric Industries, Ltd. es...