Islanding Detection Based on High Frequency Injection for Multi Inverter Microgrid
نویسندگان
چکیده
Islanding detection is one of the indispensable protection detections for grid-connected inverters. The detection of islanding is the key factor that should be considered in the analysis of grid-connection security. The non-detection zone is the performance index of anti-islanding plan. According to the phase feature, to make quantitative analyses to the nondetection zone of several frequency disturbance schemes under several different coordinate systems. By increasing disturbance, namely injecting third harmonic, to the modulating wave that produces inverter drive signal, detect the voltage value and the total harmonic distortion of the power grid. To choose the active current all-disturbance islanding detection scheme as the initiative scheme of anti-islanding detection and complete the parameter design and simulation. According to the experimental result, this method is feasible to detect the island of microgrid. In this paper, the simulation model of islanding detection of microgrid is established through MATLAB/SIMULINK, and the simulation analysis of islanding phenomenon after the injection of third harmonic wave is conducted. The simulation result verifies the validity and availability of the islanding detection method.
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