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This paper proposes a scheme to improve the system transient performance by implementing a power command compensation structure in a single phase transformer less photovoltaic inverter with dynamic power decoupling. The drawback of the original control scheme in the transient performance is analyzed and shown in simulation results. The mechanism of the proposed control scheme is discussed in detail...
Transformer-less PV inverters are gaining widespread applications with lower cost, reduced footprint, and improved efficiency. This paper builds on a recently proposed topology with doubly grounded structure that can eliminate the common mode leakage current which is a major challenge in transformer-less PV inverters. An active power decoupling strategy is implemented in the above topology for double...
Microinverters are capturing the roof-top-PV market due to their plug and play feature, easy installation, and higher power yield under partial shading condition. This paper explores a converter for the transformer-less microinverter with extended-duty-ratio (EDR) boost as the DC-DC stage and doubly grounded inverter as the DC-AC stage. EDR boost is a hybrid of the interleaved boost and switched capacitor...
This paper focuses on control design of three phase neutral point clamped multilevel inverters (NPC-MLI) interconnected with PV array to the existing grid together equipped with boost converter. To achieve synchronized pulse width modulation and nominal harmonic performance space vector modulation (SVM) is adopted. The controller method of feed forward as well as integrator anti-windup is adopted...
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