Optimization of Photovoltaic Grid-Connected Inverter System

Abstract:

In order to increase the stability of grid connection of photovoltaic plant, effort has been made to study the grid connection principle of photovoltaic plant, mathematical model of grid-connected photovoltaic inverter and power grid distributed parameters, and improve traditional space vector control theory to keep d axis of d-q rotating coordinates consistent with the rotating space vector of network voltage and realize decoupling control over active power and reactive power of grid-connected photovoltaic system, through real-time detection of fluctuations in grid-connected current and network voltage, get voltage current dual-loop to place feedback control, which effectively compensates the modulating signal of inverter, reduces photovoltaic grid-connected output voltage and current harmonics so that the system has better robustness, and improves the reliability of grid connection.

• Periodical: Advanced Materials Research (Volume 722)
• Pages: 161-165
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.722.161
• Online since: July 2013
• Authors: Xing Quan Wu, Qiu Peng Li, Yan Li
• Keywords: Photovoltaic Plant, Power-Grid Connection, Space Vector, Three-Phase Inverter

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