Abstract
This paper mainly studies the mathematical model and control strategy of three-phase grid connected inverter, established its mathematical models in <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$abc$</tex> three-phase static coordinate system, <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\alpha\beta$</tex> two-phase static coordinate system and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$dq$</tex> two-phase synchronous rotating coordinate system. Then analyzed its working principle and control strategy in detail, so as to lay a theoretical foundation for the research of control parameter design of three-phase grid connected inverter based on SPWM Control.
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