The invention discloses a photovoltaic grid-connected
inverter parameter multi-objective optimization design method,
system and device and a storage medium, and belongs to the technical field of
new energy grid connection, and the method comprises the steps: constructing a control frame of a photovoltaic grid-connected
inverter system, and the control frame comprises a filter and a controller; establishing a
harmonic content model for representing the
harmonic content of the output current of the
system and a
transfer function model for representing the dynamic
response characteristics of the system based on the control framework; preliminarily determining a feasible region of filter parameters according to the electrical indexes, and determining a final feasible region of the filter and controller parameters based on a
transfer function model; establishing a multi-dimensional optimization objective of the system, and solving a multi-dimensional optimization objective function to obtain optimal parameter configuration of the system; the method can achieve the collaborative optimization of
harmonic suppression, dynamic adjustment time, steady-
state control precision and filter cost,
balance performance and economy, flexibly adapt to different
engineering priority requirements, can be directly applied to
engineering design, and improves the comprehensive operation performance of a photovoltaic grid-connected system.