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This paper presents a harmonic current injection control for active islanding detection of grid-connected inverters. A standardized islanding detection method called frequency feedback method with step reactive power injection is used in the inverter system for islanding detection. After an islanding event, this method measures the change of voltage harmonic distortion and injects reactive power to...
In this paper, a novel current control technique is proposed to control both active and reactive power flow from a renewable energy source feeding a microgrid system through a single-phase parallel-connected inverter. The parallel-connected inverter ensures active and reactive power flow from the grid with low-current total harmonic distortion even in the presence of nonlinear load. A p-q theory-based...
As more distributed generators join the utility grid, the concern of unintentional islanding increases. This concern is due to the safety hazards this phenomena imposes on the personnel and equipment. Passive anti-islanding methods monitor grid parameters to detect islanding, whereas active methods inject perturbation into current waveform to drive theses parameters out of limit. The performance of...
This paper proposes a robust hybrid anti-islanding method for Inverter-based Distributed Generation (DG). This method is based on Active and passive detection techniques. Active anti islanding technique generates disturbances at the output of the distributed generation by Positive feedback and Continuous feedback signal injection which is based on DQ implementation. On the other hand passive anti...
In this paper hybrid anti-islanding algorithm for utility interconnection of distributed generation is proposed. This algorithm is based on two detection schemes; namely active and passive. Active detection algorithm generates disturbances at the output by positive feedback and continuous feedback signal injection which is based on DQ implementation. On the other hand passive detection algorithm detects...
A control system of grid-connected power conditioner for renewable energy is proposed and studied. The proposed control system consists of voltage and current control strategy, compensation control strategy and anti-islanding control strategy, which can be considered as a solution of the control strategy for renewable energy generation system. The power conditioner with the proposed control system...
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