Fei Yuan
The current focus is shifting toward the integration of small and medium-scale power plants based on renewable energy sources into the power distribution system. Solar energy is the fastest growing renewable energy source, and a single phase voltage source inverter is used to connect photovoltaic plants to the distribution system. The control requirements for the grid integrated inverter are stringent. A current controller is used to reduce harmonics in the injected current into the grid and to regulate the power exchange between the plant and the grid. This paper provides an overview of the current control strategies used for a single phase grid-connected photovoltaic inverter. Through simulation and experimental results, a comparative performance evaluation of current control techniques is also presented.
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