Open AccessVoltage Injection based MPDPC Technique for Individual Phase Loss Reduction in Active Front-End Rectifier
Author(s) -
Minh Hoang Nguyen,
Sangshin Kwak,
Seungdeog Choi
Publication year - 2024
Publication title -
ieee access
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 127
ISSN - 2169-3536
DOI - 10.1109/access.2024.3382127
Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation
Active front-end (AFE) rectifiers are a well-known solution for industrial applications because of several advantages such as bidirectional power flow, low harmonic distortion of the line currents, and the possibility of the dc-link voltage adjustment. Typically, in three-phase AFE rectifiers, the power is distributed evenly among the phase legs, aiming for a natural balancing of aging over time. However, uneven thermal stress caused by different switching frequencies or design of cooling system and prior replacement of failure power switches might create an unavoidable aging mismatch between phase legs of AFE rectifier. In this article, a per-phase model predictive direct power control with offset voltage injection is proposed. The proposed method notably reduces power loss of the leg having highest aging state to improve the lifespan of rectifier and reduce the maintenance costs. The active power and reactive power of the AFE rectifier are regulated using predicted rectifier voltages, which are modified by injecting proper offset voltage to decrease switching loss in the leg having highest aging state. The minimum power loss in the leg having highest aging state involves avoiding changing the corresponding switching state for two-thirds of the fundamental period. The simulation and experimental results are presented in comparison to conventional model predictive direct power control to confirm the effectiveness of the proposed technique.