ADVANCED TECHNIQUE FOR BALANCED ISLANDING DETECTION OF DG SYSTEM CONNECTED TO GRID

Electrical engineering

The integration of renewable energy sources and Distributed Generation (DG) systems into power grids is rapidly increasing. However, islanding remains a major challenge affecting system safety and reliability. Islanding occurs when a DG system continues supplying power after disconnection from the main grid. According to the Institute of Electrical and Electronics Engineers IEEE 1547 standard, islanding must be detected within 2 seconds. Conventional passive islanding detection methods have large Non-Detection Zones (NDZ).These methods often fail under balanced load and low power mismatch conditions. This paper proposes a passive islanding detection method based on the Rate of Change of Phase Angle between Positive Sequence Voltage and Current (RCPABPSVAC).The proposed method effectively detects islanding conditions with high sensitivity and accuracy. It also distinguishes islanding events from non-islanding disturbances such as faults and load switching. The performance of the proposed technique is validated using MATLAB Simulink simulation results.

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