List of Articles Power Distribution

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  1 - Optical Power Distributions for 4×4 MIMO Visible Light Communications in Indoor Environment
  lwaa abdulameer Ahmed Hassan Aliaa T. Obeed Aya N. Dahir
  10.29252/jist.8.31.140
  Visible Light Communication (VLC) has emerged as a powerful technique for wireless communication systems. Providing high data rate and increasing capacity are the major problems in VLC. Recent evidence suggests that Multiple Input Multiple Output (MIMO) technique can of More

  Visible Light Communication (VLC) has emerged as a powerful technique for wireless communication systems. Providing high data rate and increasing capacity are the major problems in VLC. Recent evidence suggests that Multiple Input Multiple Output (MIMO) technique can offers improved data rates and increased link range. This paper describes the design and implementation of visible light communication system in indoor environment exploring the benefits of MIMO. The specific objective of this research was to implement a 4×4 Multiple Input (LEDs) Multiple Output (photodetectors)-VLC communication system, where a 16 white power LEDs in four arrays are setting up at transmitter and four RX modules are setting up at receiver side without the need for additional power or bandwidth as well as analyze a mathematical model for a VLC- 4×4 MIMO with different modes such as the suitable angles to cover the entire room. The research designs practically an electronic circuit for the transmitter and receiver with inexpensive components. The power distribution of different propagation modes is calculated for Single Input Single Output (SISO) and MIMO channels in typical room dimensions. The results in this paper indicate that the power is distributed uniformly for entire room when implemented VLC-MIMO as compared to VLC-SISO. Furthermore, a 4×4 MIMO implementing VLC is compared in term of BER vs. SINR with SISO communication system for both Line of Sight (LOS) and Non Line of Sight (NLOS) propagation modes. Comparing the two results of LOS and NLOS, it can be seen that a 4×4 MIMO implementing VLC for LOS perform better than the same system with NLOS due to decreasing in the received power resulted from the multipath effect. Manuscript profile
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  2 - Prioritization of Power Distribution Smart Grid Technologies based on the Attractiveness Criteria, Case Study on Mazandaran Power Distribution Company
  1Maral Mohaghegh Babak Shirazi
  10.7508/jstpi.2016.04.006
  A smart grid is the modern power grid to resolve many issues of current power grid systems with higher reliability, self-healing, ability to support renewable energy sources and reduction of environmental impacts. Novelty and necessity of power smart grid knowledge has More

  A smart grid is the modern power grid to resolve many issues of current power grid systems with higher reliability, self-healing, ability to support renewable energy sources and reduction of environmental impacts. Novelty and necessity of power smart grid knowledge has led to feel technologies assessment is needed for development and determination the attractiveness of product and process technologies in this industry. Distribution network is an important part of a power system and nearest part to the consumers that should pay special attention to it. The aim of this study was to prioritize power smart grid technology with respect to the attractiveness criteria in Mazandaran power distributed company. So, the list of key technologies related to power smart grid was prepared. Then 9 criteria were identified. Questionnaire was designed to obtain the experts’ point about the status of each technology in every criteria. Saw is Multiple Attribute Decision Making model for weighing the criteria, determining the relative status of each technology, group decision-making and technology assessment. The results show that moment billing, wireless, load forecasting, energy costs calculating and software are the most important technologies based on the attractiveness in the Mazandaran power distribution company. Also is the basic step for planning, strategy of technologies and time management. Manuscript profile
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  3 - Talent Management and Meritocracy in Organization: Analyzing the Mediating Role of Organizational Factors
  maryam hesami roohalla samiee Fereydon  Azma mahmoodreza mostaghimi
  The present study investigates the effect of talent management on meritocracy: by explaining the mediating role of organizational factors (organizational memory - organizational strategy - organizational intelligence - knowledge management - organizational development). More

  The present study investigates the effect of talent management on meritocracy: by explaining the mediating role of organizational factors (organizational memory - organizational strategy - organizational intelligence - knowledge management - organizational development). This research has been applied in terms of purpose and descriptive-survey. The statistical population of the study was the managers of 124 electricity distribution companies. The sample size was determined according to Krejcie and Morgan table of 94 people and simple random sampling method was used for sampling. Data analysis was performed by structural equation method with Smart PLS software. Talent management has a significant effect on meritocracy and organizational factors. Organizational factors have a significant impact on meritocracy. The findings also confirmed the mediating role of organizational factors in the relationship between talent management and meritocracy. Manuscript profile
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  4 - Fault Location in Distribution Networks Using a Combination of Impedance Base Method and Voltage Sag
  Mohammad Daisy R. Dashti
  Load taps, laterals, and sub laterals are different branches of power distribution (PD) networks. In PD systems, reliability indices and their efficiency are improved using an accurate method in fault locating. In this paper, a new combined method for locating single, d More

  Load taps, laterals, and sub laterals are different branches of power distribution (PD) networks. In PD systems, reliability indices and their efficiency are improved using an accurate method in fault locating. In this paper, a new combined method for locating single, double and three phase faults to ground is proposed in PD networks. In this article, for finding the possible fault locations, an impedance based fault-location algorithm is used. Then, for determining the faulty section, the new method is proposed using voltage sag matching algorithm. In this method, the possible fault locations are determined, after occurrence of single and double phase faults to ground, using an algorithm which is impedance based fault-location algorithm. Separately, the same fault is simulated in possible locations. Then, at the beginning of a feeder, the voltage is saved and the amplitude and angle of the voltage differences are determined and accordingly, an online data bank is generated. Then, the obtained and recorded amplitude and angle of the voltage differences (at the beginning of the feeder) is compared with that data bank, for the actual fault. By the matching value of each possible fault location, the real location of fault is determined. Compared to the other counterparts, the proposed method is more accurate in locating faults and less sensitive to the fault resistance. Manuscript profile
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  5 - Stochastic Planning of Resilience Enhancement for Electric Power Distribution Systems against Extreme Dust Storms
  M. Haghshenas R. Hooshmand M. Gholipour
  Resilience in power systems refers to the system's ability to withstand severe disturbances with a low probability of occurrence. Because in recent years extreme dust storms have caused severe damage to Iran's electricity industry, especially in the south and southwest, More

  Resilience in power systems refers to the system's ability to withstand severe disturbances with a low probability of occurrence. Because in recent years extreme dust storms have caused severe damage to Iran's electricity industry, especially in the south and southwest, in this paper proposed a new scenario-based stochastic planning model for enhancement of power distribution systems resilience against extreme dust storms. In proposed model, in the first stage, the investment costs to improve the distribution system resilience against extreme dust storms are minimized due to the financial constraints, and in the second stage, the expected operating costs in dust storm conditions are minimized due to the operating constraints. Because network's insulation equipment are major cause of distribution system vulnerabilities in the dust storms, measures in the planning stage include replacement of porcelain insulators with silicon-rubber type, installation of automatic tie switches and installation of emergency generators. In the second stage, the measures are divided into preventive actions and corrective actions, and coordination between stages 1 and 2 is implemented in such a way that the results of each stage depend on the decision variables of the other stage. The simulation results for IEEE 33-bus test system and a 209 bus radial distribution network located in Khuzestan province, Iran, confirm the efficiency of the proposed model in different financial conditions. Manuscript profile
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  6 - Factors Influencing Development in South Korea
  zahra Sadeghi Mohammadbagher Beheshti
  The end of Second World War has marked the beginning of an era of renovation and development for many countries in the world and European and Asian countries have utilized several development strategies based on their situation. South Korea is one of those countries. Ha More

  The end of Second World War has marked the beginning of an era of renovation and development for many countries in the world and European and Asian countries have utilized several development strategies based on their situation. South Korea is one of those countries. Having an ancient history, South Korea is one of the most integrated and stable countries in the world. Its development which starts right after the end of the second world war and Japanese colonization is an outstanding example of fast and extraordinary development in a short time span. Despite having the bitter experience of being colonized, what happened as a consequence of the second world war, the division of the peninsula into two parts (North and South) and the civil war following that, and the severe poverty and dependence on international aid, it is one of the Asian Tigers, together with Taiwan, Singapore, and Hong Kong. Having an authoritarian but developmentalist government, a strong sense of nationalism against foreigners, Confucian culture, a focus on export expansion strategies, and the development of an education system based on economic needs and changes are among the influential factors discussed in this paper. Finally, the development model of South Korea is presented. Manuscript profile
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  7 - Factors Influencing Development in South Korea
  zahra Sadeghi Mohammadbagher Beheshti
  Zahra Sadeghi Mohammadbagher Beheshti Abstract The end of Second World War has marked the beginning of an era of renovation and development for many countries in the world and European and Asian countries have utilized several development strategies based on th More

  Zahra Sadeghi Mohammadbagher Beheshti Abstract The end of Second World War has marked the beginning of an era of renovation and development for many countries in the world and European and Asian countries have utilized several development strategies based on their situation. South Korea is one of those countries. Having an ancient history, South Korea is one of the most integrated and stable countries in the world. Its development which starts right after the end of the second world war and Japanese colonization is an outstanding example of fast and extraordinary development in a short time span. Despite having the bitter experience of being colonized, what happened as a consequence of the second world war, the division of the peninsula into two parts (North and South) and the civil war following that, and the severe poverty and dependence on international aid, it is one of the Asian Tigers, together with Taiwan, Singapore, and Hong Kong. Having an authoritarian but developmentalist government, a strong sense of nationalism against foreigners, Confucian culture, a focus on export expansion strategies, and the development of an education system based on economic needs and changes are among the influential factors that are discussed in line with the main question of the paper. Finally, the development model of South Korea is presented. Manuscript profile