Abstract:This paper presents the analysis and comparison of the main active techniques for islanding detection used in grid-connected microinverters for power processing of renewable energy sources. These techniques can be classified into two classes: techniques introducing positive feedback in the control of the inverter and techniques based on harmonics injection. Accurate PSIM TM simulations have been carried out in order to perform a comparative analysis of the techniques under study and to establish their advantag… Show more
“…The second type of anti-island detection method is based on feedback techniques and on monitoring the response to disturbances deliberately injected into the circuit [58]. Indeed, active method has same principle as the control mechanism, and detects the variation of both frequency and voltage at the Point of Common Coupling (PCC) [44,59].…”
Abstract. The development of distribution networks for participation in active network management (ANM) and smart grids is introduced using the microgrid concept. In recent years, this issue has been researched and implemented by many experts. The second part of this paper describes those developed operational concepts of microgrids that have an impact on their participation in ANM and in the requirements for achieving targets. Power quality is the most challenging task in microgrids, especially when the system switches from normal parallel operation (grid-connection mode) to island operation. Indeed, following planned or unplanned transitions to island mode, microgrids may develop instability. For this reason, the paper addresses the principles behind island-detection methods, black-start operation, fault management, and protection systems, along with a comprehensive review of power quality.Finally, island detection and the other topics are summarized with a flowchart and tables.
“…The second type of anti-island detection method is based on feedback techniques and on monitoring the response to disturbances deliberately injected into the circuit [58]. Indeed, active method has same principle as the control mechanism, and detects the variation of both frequency and voltage at the Point of Common Coupling (PCC) [44,59].…”
Abstract. The development of distribution networks for participation in active network management (ANM) and smart grids is introduced using the microgrid concept. In recent years, this issue has been researched and implemented by many experts. The second part of this paper describes those developed operational concepts of microgrids that have an impact on their participation in ANM and in the requirements for achieving targets. Power quality is the most challenging task in microgrids, especially when the system switches from normal parallel operation (grid-connection mode) to island operation. Indeed, following planned or unplanned transitions to island mode, microgrids may develop instability. For this reason, the paper addresses the principles behind island-detection methods, black-start operation, fault management, and protection systems, along with a comprehensive review of power quality.Finally, island detection and the other topics are summarized with a flowchart and tables.
“…However, strongly depends on both the speed of the PMSG, m , and the wind speed, v , as it is shown in (3)- (6). depends on the as shown in (9).Therefore, in this paper include Tm, so considering all the variables involved in the system, which allows a complete analysis of the system.…”
Section: Developing It Is Obtainedmentioning
confidence: 99%
“…Currently wind energy can be used under various schemes, that is, primary source with storage systems provide energy in remote locations [5]; as primary energy source with conventional sources to inject energy into a grid; and as an energy source in microgrids schemes in distributed generation systems [6]- [7].…”
ElsevierCarranza Castillo, O.; Figueres Amorós, E.; Garcerá Sanfeliú, G.; González Medina, R. (2013). Analysis of the control structure of wind energy generation systems based on a permanent magnet synchronous generator. Applied Energy. 103:522-538. doi:10.1016Energy. 103:522-538. doi:10. /j.apenergy.2012 Analysis of the control structure of a wind generation system based on permanent magnet synchronous generator
AbstractThis paper presents the analysis of the two control structures used in wind generation systems with permanent magnet synchronous generators, variable speed and fixed pitch, to determine which structure is most appropriate for implementation. These control structures are speed control and torque control. The analysis considers all the elements of wind power generation system, with greater emphasis on the model of the turbine where mechanical torque is considered as a system variable and not as in other studies where it is considered as internal disturbance in the system. The analysis is developed so that the control structure is independent of AC/DC converter that is used in the system. From the analysis is obtained that the speed control can be stable using classical control techniques because it is a nonminimum phase system and the torque control is unstable because it has poles and zeros in the right half plane, very low frequency and very close to each other, so it is very difficult to control using classical control theory. In the evaluation of the speed control structure, the AC/DC converter is Three-phase rectifier Boost in Discontinuous Conduction Mode with an input filter and a Peak Current Control and to avoid the need of mechanical sensors, a Linear Kalman Filter has been chosen to estimate the generator speed.
“…When in grid connected connection, the amplitude of voltage is not affected noticeably but in island condition, power output can expedite the voltage drift to detect islanding. SVS affects the maximum power tracking mechanism of the inverter due to alteration of power output [43,44]. [47].…”
The augmentation in electricity demand, power system privatization as well as efficacy of renewable resources has paved the way for power system companies and researchers to exploit the field of grid connected distributed generation (DG) and its issues, islanding being a dominant one. Several research works have been conducted to mitigate the issues of islanding detection (ID). In context of this, the paper gives a comprehensive review of islanding issues, standard test systems, criteria and shifting of research trends in islanding detection methods (IDMs). The significant contributions pertain to categorization of IDMs, evaluation of non-detection zone (NDZ) for each test system, disquisition on evolution and advancement of IDMs and its comparisons based on criteria such as NDZ, run on time, nuisance tripping percentage, applicability in multi DG system and implementation cost to draw out the strength and shortcomings of individual methods that will come to aid to the companies or researchers for establishing the applicability and appropriateness of such method for their concerned domain.
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