公开(公告)号：US12278492B1

公开(公告)日：2025-04-15

申请号：US18982070

申请日：2024-12-16

Applicant: SHANDONG UNIVERSITY

Inventor： Yuanyuan Sun ,  Pengbo Shan ,  Yahui Li ,  Lei Ding ,  Kejun Li ,  Kaiqi Sun ,  Zhijie Liu ,  Yirou Lai ,  Zhijie Ma ,  Qianqian Li

IPC: H02J3/01 ,  H02J3/38

Abstract: The present invention provides a method and system of self-adaptive setting of closed-loop parameters for suppressing PV coupling harmonics, comprising: acquiring node voltages and node currents of PV grid-connected inverters; constructing harmonic coupling admittance matrix according to the node voltages and node currents; calculating an amplitude of each element in the constructed harmonic coupling admittance matrix; screening contribution sources of coupling harmonics according to the calculated amplitude of the each element; evaluating quantitatively harmonic admittance of the PV grid-connected inverter according to screened contribution sources; and, carrying out optimization iteration for double-closed-loop PI control parameters of inverter with objective of minimizing the coupling harmonics of the PV grid-connected inverter according to results of the quantitative evaluation of the harmonic admittance, to complete self-adaptive setting of closed-loop parameters for suppressing PV coupling harmonics.