公开(公告)号：US20250150004A1

公开(公告)日：2025-05-08

申请号：US19017286

申请日：2025-01-10

Applicant: SOUTHEAST UNIVERSITY

Inventor： Huafeng XIAO ,  Xu WU

IPC: H02M7/5387 ,  G01R29/12 ,  H02M1/12 ,  H02M7/483

Abstract: Disclosed is a direct control method and system for an internal potential of a bridge arm of a new energy grid-tied inverter (GTI), the control method including the following steps. Measured values are obtained by measuring a port voltage and a port current of a GTI, instantaneous active and reactive power values are calculated, and a phase angle and amplitude reference of an internal potential of a bridge arm are obtained to generate reference values thereof. The internal potential of the bridge arm is estimated, and an estimated value used as a feedback signal, after being compared with the reference values, is sent to an internal potential controller to obtain a modulating signal, which is sent to a pulse width modulation (PWM) module, realizing direct control of the internal potential of the bridge arm. In the present disclosure, the dynamic performance of the GTI is improved while improving power quality.