Journal of Majlesi Journal of Mechatronic Systems
Volume:6 Issue: 4, Dec 2017

As today’s world day to day demand of electricity increases results huge demand should be met by the generation at the same time this generation challenges higher service reliability, socioeconomic growth, environmental conditions and better power quality. This imposes the increment of distributed generations to meet most of local demand in certain areas. In this regard, micro grid is the best way to interconnect the DGs to meet the local demand as well as desired objectives such cost and emission. In this paper, adaptive weight control PSO is used for economic dispatch. PSO is a search technique in that for a best optimal position can be achieved by better controlling of inertia weight of the particle which is implemented for the optimal operation of micro grid with renewable energy sources. Here multi objective nonlinear constraint problem is formulated and typical micro grid concise of micro turbine, fuel cell, renewable systems(PV,wind), and battery chosen to meet variable demand of 24 hours, AWCPSO is applied to minimize the cost and emission simultaneously. For the better realization of the problem different cases are imposed such as all the real constraints are within the limits, maximum renewable penetration, and extended exchange limit with macro grid which implies extreme detection of all the conditions of micro grid.

Adaptive single pole automatic reclosure (ASPAR) scheme for transmission lines (TL) using wavelet packet transform (WPT) is presented in this paper. The presented scheme only needs on-line voltage data that are sampled from one end of the lines. The proposed scheme uses an adaptive threshold level in order to be suitable for the probable network-topology changes. The scheme is based on second, third, and fifth harmonics values in order to distinguish between the permanent and temporary (transient) faults. Also, it is based on monitoring the DC component to identify the arc extinction time. The performance evaluation is accomplished considering 220 kV single and double circuits transmission lines, simulated by the ATP/EMTP package under different system configurations such as shunt/series compensators (shunt reactors and series capacitors). The impact of shunt/series compensators on the line voltage is noticed and, therefore, the mal-operation of the presented auto-reclosing scheme is avoided. The sample results of the assessment are declared and discussed.

In this paper we describe two-level structure for mobile phone's network aiming to deployment of next generation of cellular networks. After fourth-generation of mobile communication we will be facing the 5G soon. In Next Generation of Mobile Communication(NGMC), we expect two concepts: "seamless connection" in "heterogeneous network". Thus we offer two-level operators that can support those concepts with minimal implementation and cost of change in comparison to the current situation. The important features of our proposed structure are cooperative Radio Resource Management (RRM), regarding user's favorites that cause to increase of user's satisfaction in using the various services of different operators according to location, time, type, function and cost. This proposed structure also support earlier generation of cellular networks.

With a little daring، it can be said, Fire is the most dangerous enemy of the forest. Thousands of hectares of trees, shrubs and plants burned every year and they are destroyed. Of course, the benefits of a controlled fire should not be hidden. Only strategic management can determine the usefulness or the harmfulness of a fire. In this regard, remote sensing technology can provide useful information on environmental conditions. The index used in this study is to show the health status, extent and density of NDVI plants, which is one of the common indices of studying plants in remote sensing. In this research, using vegetation index analysis, we process satellite images of fire areas. By evaluating processed images, areas that identify a type of surface fire. Ultimately, with specific techniques, the area of the fire will be determined. As a result, a total of 11250 hectares of forest land has been burned in Golestan province. Of this amount, 7625 hectares of surface fires. Because there is not much damage to the forest area, and next year we saw an increase in NDVI and more regeneration in the forest, Therefore, it can be said, this is a controlled fire and it is a kind of useful fire.

One of the biggest incidents in the industry is the tragedy of Piper Alpha, which killed more than 200 people on an oil platform in the North Sea. This incident made the oil industry to revise and improve safety systems and more precise paper-based permitting systems were developed. With the growth of information technology, the traditional systems of work permits have been replaced with integrated safe system of work, which, in addition to ensuring work safety, reduces costs. In this research, the current safety system on the site of Mobarakeh casting department was reviewed and a pilot electronics system was developed whose implementation will enhance productivity while improving safety.

Water management in a PEMFC is one of the biggest issues for the operation of the polymer membrane the cell and one the main topics of study of PEMFC systems. However in this article a mathematical model is intended for define the different static and dynamic characteristics of the energy behavior (voltage, power and relative humidity) for different input operating parameters values (current, pressure, temperature, hydrogen, oxygen and water flow rates). A new feasible graphical approach is used because of its simplicity and feasibility, consists of using the Macroscopic Energy Representation (EMR), based on the reaction action principle, taking into account the accumulation elements and leads to model the different elements of the system. This model is obtained to deduce and highlight a fuel cell energy management strategy taking into account the water activity in the electrolyte membrane, in order to avoid the inconvenience of flooding, drought and being able to achieve a desired humidity level content suitable for the implementation of this PEMFC. The simulation results show the beneficial interest of the Relativity Humidity around 100% to ensure the performance of the smooth operation. For this purpose, a control method based on inversion called the Maximum Control Structure (MCS) is used for the smooth running of this electrical system.