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This paper presents a competitive model for energy managment at the residential complexes in a city.This model includes cultural patterns and technical models together.The combination of culture and technology is improved energy managment at consumers side and decreased problems at utility side for energy supply. The consumer owned smart meter shared data with a control and monitoring center(CMC) through wire or wireless platform and on the other side, a data analyst application is enabled on the server and after analyzing and processing data received from the customers, the information are transmitted to a database(SQLite). A web application also uses the information stored in the database. The smart meters integrate different types of information coming from several electric or electronic devices present in buildings via ZigBee or WiFi platform.This information are shown to the building residents through graphical forms, tables and charts via web programming methods.

The harmonic interaction mechanism in a wind park is examined in this paper. The paper investigates the feasibility of a solution to the yet challenging harmonic contribution estimation from multiple sources in a wind park with limited available information, via an extension of a simple modeling approach as well as from detailed analysis of field measurements. The paper has two distinct objectives in assessing harmonic interactions (a) one to extend the classical Norton equivalent model to a multi-measurement wind park system and to suggest potential areas for further model developments from field measurement analysis, and (b) second to draw inferences from field measurements and to develop a new independent concept of analysis from long-term field measurements in the wind park. From practical experience, a new concept of analysis with a 'harmonic interaction break-even point' is introduced. With the help of it, one could identify whether the primary emission (emission from considered source) or secondary emission (emission from a distant source) dominates in the analysis period. In this way, the highest responsibility between different interacting time-varying harmonic sources is evaluated. It was concluded that from long-term measurements one can define a magnitude of power production where a certain harmonic order is canceled or reaches its lowest magnitude. If one finds this cancellation point, one can define a level of secondary/primary emission or at least a feasible range. This knowledge is a step forward towards harmonic contribution analysis.

Providing uninterruptable electric power for customers is the final goal for power utilities and they do their best to minimal their SAIDI index. In this paper a mobile battery energy storage system is presented which is designed and utilized in Mashhad Electric Energy Distribution Co. (MEEDC) and is called BEST (Battery Energy Storage Technology). What is unique and profoundly important about BEST is its flexibility to take advantage of multiple benefits from a single device. BEST provides the opportunity to store energy from the electricity grid and return it when required. This offers a huge range of options to strengthen and enhance the performance, quality and reliability of smart electricity grids.

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