Abstract

A novel power conditioner with a power decoupling circuit is proposed in this paper. The proposed power conditioner can generate reactive power for the utility lines. Therefore, the proposed circuit must operate under very low power factors to meet the anti-islanding and fault-ride-through (FRT) functionalities required. In addition, by applying the power decoupling circuit, the current ripple of the DC input side capacitor can be reduced. Therefore, a film capacitor can be used instead of an electrolytic capacitor. The influence of the maximum power point tracking (MPPT) control can be reduced as well. The operating principle, theoretical analysis, and circuit/characteristic simulations of the proposed circuit are described. In addition, the hardware is implemented with a 100-V DC input and a 50-V AC/100-W output to demonstrate its feasibility.

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