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Control of grid-connected inverter (GCI) directly affects the performance of inverter-interfaced distributed generators. In this paper, a circuit-based modeling method is proposed to combine the control algorithm in software and the topology configuration in hardware of a GCI. On the basis of the same mathematical model, control blocks are equivalently changed into circuit models. By using the proposed...
By utilizing next-gen wide band-gap (WBG) devices, such as GaN and SiC, at high switching frequency in a single-phase Quasi-Z-Source PV inverter (qZSI), the impedance network can be significantly reduced. Although, the reduced qZS impedance network will decrease cost and improved power density, it will also result in frequency resonance that will introduce oscillations in the capacitor voltage and...
When applying parallel active power filter (PAPF) to the power transmission/distribution system that contains the reactive power compensation capacitors, the capacitors can influence the system stability and the compensation performance of PAPF. In this paper, considering the influence of capacitors, the harmonics compensation and resonance damping characteristics of PAPF with traditional load current...
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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