This analysis demonstrates improved reactive power distribution and harmonic suppression in LV microgrids, suggesting ERPDC's potential in addressing resistive feeder issues.
This paper explores the unique characteristics of both active and reactive power flow in Low-Voltage (LV) microgrids under different feeder impedance conditions during the parallel operation of distributed generators. It focuses on systems with mainly resistive feeder impedance, which pose challenges in accurate reactive power sharing and harmonic compensation. To address these challenges, the concept of an Enhanced Reactive Power Droop Controller (ERPDC) is applied as a control strategy. This method is developed to improve the distribution of reactive power and effectively reduce specific harmonic distortions, particularly the fifth and seventh harmonics that arise when non-linear loads are connected. The proposed approach is tested under various operating scenarios to evaluate its performance. Detailed simulations are carried out in the MATLAB Simulink environment, and results show that ERPDC offers better harmonic suppression and improved system stability when compared to conventional techniques.
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