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Without utilizing zero vectors, reduced common-mode voltage pulsewidth modulation (RCMV-PWM) have been proposed to reduce the common-mode voltage (CMV) and the leakage current in three-phase transformerless photovoltaic (PV) inverter. Nevertheless, the elimination of the zero vectors from RCMV-PWM methods have degraded the overall performance of the PV inverters such as cost, voltage linearity, dc-link...
Transformerless grid-connected PV inverter is widely used recently because it is smaller in size and highly efficient. Nevertheless, high leakage current flows between the PV array and the grid due to the parasitic capacitance. To overcome this problem, several conversion topologies and modulation techniques have been proposed recently. However, these lead to additional cost and low efficiency due...
Small, light, low cost and high efficiency grid connected photovoltaic (PV) systems can be achieved when the transformer is omitted from the inverter. However, dangerous leakage current will flow between PV array and the grid due to the stray capacitance. The leakage current increases conducted and radiated electromagnetic interference, total harmonic distortion (THD) and losses. Moreover, injection...
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