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.

公开(公告)号：US12266942B1

公开(公告)日：2025-04-01

申请号：US18947049

申请日：2024-11-14

Applicant: SHANDONG UNIVERSITY ,  SHANDONG JIAOTONG UNIVERSITY ,  SHANDONG BEIXINGQUAN ENERGY CO., LTD. ,  IMPERIAL COLLEGE LONDON

Inventor： Kejun Li ,  Zhijie Liu ,  Yuanzong Song ,  Zhenshan Huang ,  Yuchuan Li ,  Gang Shen ,  Yuanyuan Sun ,  Kaiqi Sun ,  Jie Lou ,  Liang Zhang ,  Kehan Zhang

IPC: H02J3/38 ,  H02P21/22 ,  H02S40/32 ,  H02S50/10

Abstract: A fast-response photovoltaic (PV) simulator based on an improved deadbeat predictive current control (DPCC). Compared to actual PV modules, there is a response time at the output of the PV simulation. Currently widely used PV simulation have a long response time, which cannot meet the performance testing requirements of high-performance grid-connected PV inverters. Based on the energy balance of the inductor during the absorption and dissipation phases, the current control law of the output inductor in the PV simulation was studied in a single switching period, thereby establishing the required DPCC model. An integral compensation eliminates the steady-state error in current tracking caused by nonlinear factors such as time delay and mismatched parameters, enabling its wide application in engineering. For the proposed PV simulator, the transient response time can be reduced to 1.1 ms and significantly shorter than widely used PV simulation.