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The motivation of this research arises from the design of a low scale electric generation project, where a poly-phase generator is designed to harvest the energy from static exercise machines. This article presents the development of a static power electronics scheme based on a rectifier, dc-dc converter and a voltage source inverter (VSI) that enables the efficient energy management between a variable...
The photovoltaic (PV) source simulators are widely used to test solar inverters, evaluate their control algorithms and study their grid integration issues in the laboratory settings. Many commercial programmable dc power supplies can be re-programed to be PV simulators. Due to the bulky output dc capacitors, the dynamic response and the bandwidth of these PV simulators are significantly limited, which,...
The increasing penetration of inverter based renewable generation (RG) in the form of solar photo-voltaic (PV) or wind has introduced numerous operational challenges and uncertainties. According to the standards [1], [2], these generators are made to trip offline if their operating requirements are not met. In an RG-rich system, this might alter the system dynamics and/or cause shifting of the equilibrium...
This work provides the guidelines to calculate the size of the DC-link capacitor to contribute with additional energy - for a short period of time - than the photovoltaic panel can supply under normal operating conditions. First, a model of a three-phase electric generation system is used that combines photovoltaic panels and an inverter with an LCL filter at network side. In addition, a control algorithm...
A square wave transmission based micro-grid, which is compatible with commercial AC sinusoidal grid components, is investigated in this paper for rural areas. The basic interface circuit unit, square wave generator (SWG) is designed to satisfy bidirectional power flow and square wave transfer. The square wave has larger power delivery compared to sine wave. The circulating current of paralleled SWGs...
In Grid-Connected PV system should not be limited injecting the active power into the grid. However, it must be able to absorb or to generate sufficient reactive power for a certain amount of time according to the grid demand and maintain the grid voltage. This paper proposes sliding mode control that controls powers respectively the active and the reactive power for a Three-Phase Grid-Connected PV...
This paper presents a study and a complete design of stand-alone photovoltaic system for providing the electrical loads in Addis Boder health center according to daily energy requirements. The procedure of attaining solar energy required planning, opting and establishing arrangement of various elements those are incorporated in the mechanism to confirm the demand prediction. In this work, HOMER software...
The work presented in this paper describes an improvement of a P-V optimal slope MPPT technique. To achieve this improvement, all the degrees of freedom of the inverter control are exploited. Two forms are then established. Modeling and design of a PV power plant using these improved forms are performed. The results are validated by simulation in the Matlab-Simulink environment.
The synchronous distributed generators (SDGs) significantly impact on the protective devices because of their high fault current contribution. The effects of fault current contribution from SDG can be removed by adjusting current phase angle of inverter-based DGs (IBDGs). This paper proposes modified current phase angle calculation for IBDGs. The proposed current phase angle calculation is carried...
This paper discussed the detailed electrical model of gearless variable speed wind energy conversion system (WECS) with permanent magnet synchronous generator (PMSG) to accomplish the optimal power flow and maximum power transfer to the distribution grid. PMSG based WECS system has reduce the hardware complexity of speed regulation and their control so it's more reliable and more efficient than doubly...
This paper develops the self control strategy of the Brushless DC Motor (BDCM) fed by the reduced Three Switch Three Phase Inverter (TSTPI) using the Xilinx Kintex 7 Field Programmable Gate Arrays (FPGA) package. This proposed command begins with a test simulation on the numerical environment Matlab using in the first step the Simulink toolbox and in the second step the Xilinx System Generator (XSG)...
This paper presents the design of a micro-grid with permanent magnet brushless DC (PMBLDC) generator based wind energy conversion system (WECS) and Solar PV along with stand-alone loads. The output of the PMBLDC is converted to a controlled DC bus voltage using a PWM rectifier through which independent real and reactive power control are achieved. This DC bus is common to both solar PV and WECS. A...
In this study, an optimized design of a PV-diesel hybrid renewable energy system has been proposed to electrify remote locations in the eastern part of Malaysia, which are located far away from the grid. First, a brief review of energy status in the eastern part of Malaysia has been conducted, and then an illustration of the various electrification plans for remote locations in Sarawak has also been...
In this paper we propose the structure and the functioning of a photovoltaic (PV) connected to the electric distribution and transmission network, equipped with the malfunction detection blocks. The studies that were carried focused on the injection of a power of 16 KW, produced by a PV panel field, on the electrical network of medium voltage (25 KV). In order to the reliability of the injection system...
The wind generation system treated in this paper is composed of a fixed pitch angle wind turbine followed by a Permanent Magnet Synchronous Generator (PMSG) and power electronic converters AC-DC-AC which are coupled to a DC link. This work deals with the control of the inverter in order to ensure a constant DC link voltage. The control design is based on Takagi Sugeno fuzzy model. Stability analysis...
The world is moving towards utilization of renewable energy generation systems from last few years. The implementation of micro-grids enables utilization of renewable sources and also helps in maintaining cleanliness of environment. Microgrid is nothing but grid consisting of energy generation sources and local load which can be operated in parallel with utility grids or can be operated in islanded...
An AC microgrid system model is created to assess transient and steady state stability during periods of separation from the grid. A secondary control is constructed to dispatch energy sources according to user selected setpoints and participation factors. Two sources — an energy storage device and synchronous generator — are controlled to share active and reactive load burdens. A system load models...
The paper presents topics about the connection of two single-phase inverters with different power capabilities connected in parallel to supply linear loads. The equations of difference related to control and modelling are programed in an embedded DSP 320TMS28F335 system. The model of synchronization of Phase Locked Loop (PLL), the measurement of active and reactive power and the selected control strategy...
This paper presents a combined optimal energy and power flow management for islanded microgrids. The highest control level in this case will provide a feasible and optimized operating point around the economic optimum. In order to account for both unbalanced and balanced loads, the optimal power flow is carried out using a Glow-worm Swarm Optimizer. The control level is organized into two different...
The paper suggests an adaptive control of the wind permanent magnet synchronous generator (PMSG) driven by a variable speed wind turbine. Processes in wind generator have been studied using a mathematical model. The results show suitability of using adaptive control using Optimal Singular Adaptive (OSA) observer. A basic distinctive feature of OSA observer is the simultaneous estimation of the initial...
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