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In this paper, the power quality of microgrids is addressed. To achieve the desired level of power quality, a strategy based on the coordinated control between DGs and APFs is proposed. In this regard, hierarchical control is applied where primary control consists of power droop controller of DGs, selective virtual impedance and voltage/current regulators. Based on the secondary control, at first...
In this paper, a new method is proposed to control the interface Inverter of distributed generators (DGs) in a microgrid. The objective of this method is to effectively compensate for the harmonic currents at the Point of Common Coupling (PCC) and the MG with the Absence of dedicated compensation devices, such as Active Power Filters (APFs). The proposed control method is composed of the Adjustable...
Among all the available sources of energy, Electrical energy is widely used in many sectors because of ease of transportation, flexibility and control. The development of any country directly relies on the growth of power sector. Most of the rural India still do not have adequate household connections, due mainly to remotely placed localities. Further, it is not economically viable to run the transmission...
This paper addresses the coordinated control of distributed generators (DGs) inverters and active power filters (APFs) to compensate voltage harmonics in microgrids. For this, a hierarchical control system is proposed to mitigate voltage harmonic distortion. The hierarchical control structure includes two control levels: primary control and secondary control. Primary control consists of power controllers,...
A strategy to improve the power factor (PF) at the point of common coupling (PCC) for microgrid applications is presented in this paper. The position of the compensating unit is selected to correct the power factor and reduce the harmonic levels of the grid current and PCC voltage in microgrid connected distributed renewable energy sources. The proposed compensation system for power factor improvement...
To accomplish superior harmonic compensation performance using distributed generation (DG) unit power electronics interfaces, an adaptive hybrid voltage and current controlled method (HCM) is proposed in this paper. It shows that the proposed adaptive HCM can reduce the numbers of low-pass/bandpass filters in the DG unit digital controller. Moreover, phase-locked loops are not necessary as the microgrid...
Most micro sources need to use the inverter system to connect the grid. Because the microsources are intermittent and easily affected by the adverse weather, also the reason of getting the maximum power output, the capacity of inverter system is larger enough than need and its utilization rate is not high. Microgrid power quality is a new emerging area of research and drawing more attention. Based...
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