List of Articles Reactive power sharing

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Power Sharing Between Islanded Microgrid Inverters by Modifying the Droop Control Method
  kiomars sabzevari
  Introduction: Distributed generation appears as the eco-friendly solution to a growing demand of electricity. Within the same idea, microgrids have become one of the most attractive sources of attention since they integrate local supply sources both with cleanliness and More

  Introduction: Distributed generation appears as the eco-friendly solution to a growing demand of electricity. Within the same idea, microgrids have become one of the most attractive sources of attention since they integrate local supply sources both with cleanliness and robustness. These microgrids can operate either connected to the utility grid, or on their own, namely the islanded mode. In the case of an island microgrid, how to control the DC bus voltage and the energy balance of the microgrid is necessary and essential for its use. Voltage and frequency control as well as active and reactive power sharing between distributed generation sources in island AC microgrids is one of the challenges of microgrid control. One of the control methods of islanded microgrids is to use the common droop control method. Although the droop control method can accurately divide the active power among distributed generation sources; But in the drop control method, reactive power sharing is not accurate.Method: In this article, the adaptive droop control method is used to compensate the voltage drop caused by the line impedance and increase the accuracy of reactive power sharing in the islanded microgrid. Communication between distributed generation sources is used to facilitate the adjustment of adaptive droop control during load changes. In the proposed method, there is an assurance that by cutting the connection between the scattered production sources, if the load does not change, the reactive power sharing will be done accurately. The proposed method has a better performance than the conventional droop control method.Results: The simulation of the proposed control method has been done using Simulink MATLAB. The simulation results show that the proposed control method has accurate reactive power sharing. And it has a better performance than the common drop method.Discussion: In the proposed control method, by compensating the impedance voltage drop of the transmission line to the common point of the units, the power sharing between the inverters is proportional to the capacity of the units. The simulation results show that reactive and active power division is performed accurately with the presence of a communication link between the units. In case of constant load and disconnection between the units, the power sharing between the units is accurate. In the case of disconnection of the communication link between inverters and load change, the proposed control method performs better than the conventional drop control method. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Improvement of Conventional Droop Methods Performance During the Fault Occurrence in an Islanded Micro-Grid Using the Concept of Virtual Impedance
  Sobhan Tahanzadeh Farshad Zandi Bahador Fani Matin Dashtipour Ehsan Adib Esmaeel Rokrok
  10.30486/teeges.2022.691006
  Most Micro-Sources (MSs) are interfaced to a Micro-Grid (MG) using power electronics converters. Therefore, a MG can be envisioned as a group of parallel converters. A well-known method to control a group of parallel converters in the decentralized control structure in More

  Most Micro-Sources (MSs) are interfaced to a Micro-Grid (MG) using power electronics converters. Therefore, a MG can be envisioned as a group of parallel converters. A well-known method to control a group of parallel converters in the decentralized control structure in a MG is to use frequency and voltage droop characteristics. A problem associated with conventional droop characteristics is that reactive power is not always properly shared among MSs which may lead to converter overloading. The nature of conventional droop characteristics is linear. Therefore, these characteristics do not have a sufficient degree of freedom to function properly in nonlinear conditions, such as the occurrence of short circuit faults. Most of proposed methods in the literature are limited to specific MG structures or need extensive information of grid. For this purpose, in this paper, a new power control strategy based on a decentralized method for autonomous micro-grid consisting of voltage source inverters is presented. The control strategy based on voltage and frequency droop control methods. In the proposed method, conventional droop characteristics are corrected by using virtual impedance loop to adjusting the y-intercept of conventional curves. The proposed approach also improves voltage regulation both under normal micro-grid conditions and when faults occur. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - A New Control Strategy for Voltage Restoration and Voltage Unbalance Compensation in an Islanded Droop-Controlled Microgrid
  Amin Ranjbaran
  Manuscript profile