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This paper presents a single-stage grid-connected inverter with energy storage system (ESS) for small distributed power generation (DG) system application. A reactive power allocation (RPA) strategy is developed so the proposed inverter can provide real and reactive power in wide range. In particular, the ESS can provide not only harmonic compensation but also reactive power to enhance the system...
In power system, capacitors are widely used to compensate reactive power, which generally cause resonance problems in harmonic distorted network. In this paper, parallel active power filter (PAPF) is used to damp the resonances. Firstly, the damping characteristics of PAPF with traditional load current detection methods (detecting current including or not including the capacitor current) are analyzed...
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