List of Articles منابع تولید

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  1 - Optimal Location for Distributed Generation Based on Uuncertain Data
  H. Goodarzi  
  The purpose of this paper is optimal location of distributed generation in electric distribution networks. Load uncertainty and desired voltage range has been modeled using fuzzy data theory. The objective function includes loss reduction, improvement of profile index a More

  The purpose of this paper is optimal location of distributed generation in electric distribution networks. Load uncertainty and desired voltage range has been modeled using fuzzy data theory. The objective function includes loss reduction, improvement of profile index and voltage stability index with their relevant constraints, voltage constraints and transmittable power from the line. Load variation has been shown for three different time durations (peak, off peak and average).PSO technique has been used to optimize the objective function while Max-Min method has been applied to select the answer. Results produced from the proposed model have been provided in 5 different scenarios on a 33 bus system of IEEE. Manuscript profile
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  2 - Increment of Distributed Generation Penetration in Distribution Networks Using simultaneous Placement of Distributed Generation Resources and Energy Storage Systems
  N. Biabani M. Ramezani H. Falaghi
  In addition to the great benefits of distributed generation (DG) resources to power systems, there are some disadvantages. In spite of some benefits like decrease of received power from transmission grid, increment of DGs penetration can lead to voltage increase in dist More

  In addition to the great benefits of distributed generation (DG) resources to power systems, there are some disadvantages. In spite of some benefits like decrease of received power from transmission grid, increment of DGs penetration can lead to voltage increase in distribution networks during off peak. Hence the recent efforts have been made to handle problems to increase the penetration of these resources. The use of energy storage systems (ESSs) is one of the ways to prevent defects may arise from use of DGs in power systems and can help to increase penetration of DGs in power systems. ESSs can save energy during off peak and deliver it to the network in peak hours; hence, these equipment can reduce power losses and prevent voltage deviation during off peak by increasing load due to ESS charging. In this paper, first DG allocation and ESS placement are introduced then simultaneous placement of DG and ESS to reduce power losses in the distribution network are described. The proposed models are solved using genetic algorithm as optimization tool. The obtained results show that simultaneous placement could increase DG penetration compared to the separate allocation of these devices and pro Manuscript profile
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  3 - Reconfiguration of Distribution Network in Deregulated Environment in the Presence of DGs
  B. Arandian R. Hooshmand E. Gholipour
  Distribution system companies (DISCOs) can reduce their cost by reconfiguration as the economic way for loss reduction. This paper presents a new method for reducing DISCO costs in deregulated environment by loss reduction and power generation control of Distributed Gen More

  Distribution system companies (DISCOs) can reduce their cost by reconfiguration as the economic way for loss reduction. This paper presents a new method for reducing DISCO costs in deregulated environment by loss reduction and power generation control of Distributed Generators (DGs). Because of changing the price of energy in this environment, different network load levels with different prices were considered. This complex optimization problem is solved by a new method based on shuffled frog leaping algorithm (SFLA). Also, influence of DG presence on objective function and load flow is considered. The proposed method is applied to IEEE 33-bus and 69-bus test systems to decrease the activity cost of DISCO in deregulated environment and its capability relative to other methods is shown. Manuscript profile
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  4 - Stability Analysis of Doubly-Fed Induction Generator Wind Turbine Systems Using Modal Analysis
  Ahmad Jafari G. Shahgholian M. Zamanifar
  In this paper, the modal analysis of a grid connected doubly-fed induction generator (DFIG) using small signal stability analysis is presented and effect of variation in system parameters such as mutual inductance, stator resistance, line reactance, shaft stiffness and More

  In this paper, the modal analysis of a grid connected doubly-fed induction generator (DFIG) using small signal stability analysis is presented and effect of variation in system parameters such as mutual inductance, stator resistance, line reactance, shaft stiffness and wind speed on the eigenvalues, stability and damping ratio of different modes of system are studied. This analysis shows that which parameters variation can deviate the system from normal working conditions as well as which parameters variation can improve the system behavior. For evaluating the stability and different controllers design, the simulation results show the effects of parameters variations. Manuscript profile
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  5 - Design of a Secondary Controller Based on Distributed Cooperative Control of Distributed Generators (DGs) with Multi-Agent Systems Approach Considering DoS Cyber Attacks
  Abdollah Mirzabeigi Ali Kazemy Mehdi Ramezani Seyed Mohammad Azimi
  Today, in many control methods, neighboring system information is used for better control and synchronization between different units, and therefore, in the access and transmission of information through communication links, problems such as disruption, uncertainty, noi More

  Today, in many control methods, neighboring system information is used for better control and synchronization between different units, and therefore, in the access and transmission of information through communication links, problems such as disruption, uncertainty, noise, delay, and cyber-attacks occur. In this paper, the effect of the Denial of Service (DoS) cyber-attack on the microgrid in island mode is investigated and a cooperative distributed hierarchical controller is designed with the presence of this cyber-attack. Distributed Generations (DGs) have been analyzed with the help of multi-agent systems and the communication network between them using graph theory. The effects of the DoS cyber-attack on the model of DGs are mathematically formulated and in proving the stability and synchronization of frequency and voltage, the suitable Lyapunov function is presented and the stability analysis of DGs against these cyber-attacks is performed and the stability and synchronization conditions of DGs are proved. To confirm the proposed theoretical issues, a case study model is simulated despite the DoS attack on the communicative links in Matlab Simulink, and the results show the performance of the designed controller in different conditions. Manuscript profile
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  6 - Distributed renewable generation sources with uncertainty
  Mehdi  Dastkhan Ali Dost  Rostamizadeh
  Today, most of the electrical energy needed by countries is provided by using fossil fuels. Due to the fact that fossil energies are non-renewable and will bring environmental pollution, it is necessary to use renewable sources to provide electricity. In many studies co More

  Today, most of the electrical energy needed by countries is provided by using fossil fuels. Due to the fact that fossil energies are non-renewable and will bring environmental pollution, it is necessary to use renewable sources to provide electricity. In many studies conducted so far in this field, the random behavior of the load and new energy sources have not been taken into account, which makes the results obtained with this assumption not have enough accuracy, and due to the lack of careful examination, usually in these designs, the values The obtained are more than the required amount, which causes the cost of the system to increase. It shows the simulation results of the created index. It should be noted that Monte Carlo simulations do not produce definitive results, but the results that these simulations provide are associated with probability distributions. This proposed method uses this feature to overcome one of the basic shortcomings of the models described in previous papers (most of these papers only dealt with the effects of PHEVs without considering the probability of such effects occurring). The research carried out in this paper analyzes the performance of power devices under the high penetration of PHEVs and photovoltaic electricity and presents new methods to facilitate the integration of these two technologies in current networks. Manuscript profile
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  7 - Reactive Power management in Distribution Network Considering uncertainties in the Presence of Discrete and Continuous Reactive Power Compensator Equipment
  mahboobeh etemadizadeh maryam Ramezani H. Falaghi
  The increasing rate of distributed generation resources expansion into power systems and the random nature of these resources have altered the operation and design of these networks, and reactive power management in distribution networks belongs to this category. The us More

  The increasing rate of distributed generation resources expansion into power systems and the random nature of these resources have altered the operation and design of these networks, and reactive power management in distribution networks belongs to this category. The use of these resources in distribution networks is not without challenges and the lack of optimal management of reactive power may not bring economic efficiency for the network. Energy storage systems have the potential to solve this problem. Therefore, in this article, reactive power management in a microgrid connected to the main grid, taking into account distributed generation sources, energy storage systems and discrete reactive power compensating equipment, including capacitor banks, taking into account uncertainty in network load and Wind and solar power generation has been done. Finally, the efficiency of the method is demonstrated by numerical examinations on the distribution networks of 33 and 69 IEEE buses and in the GAMS optimization software. Manuscript profile