|Table of Contents|

 Three-level equilibrium strategy of DC voltage balancecontrol for H-bridge cascaded APFHUANG  (PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2018年01
Page:
77-85
Research Field:
Publishing date:

Info

Title:
 Three-level equilibrium strategy of DC voltage balancecontrol for H-bridge cascaded APFHUANG  
Author(s):
 Hai-hong LIU Ya-yun WANG Hai-xin WEI Ya-kun
 ( School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)
Keywords:
fifth-order zero-sequence voltage voltage balance active voltage vector total harmonic dis-tortion
PACS:
TM761
DOI:
10.15938/j.emc.2018.01.011
Abstract:
 he premise of stable operation for cascaded H-bridge active power filter is that DC voltages arebalanced. Due to differences between H-bridge modules,
imbalance of DC side voltages not only affectsthe compensation effect,but also affects the safe operation of APF. Aiming at the power exchange modelbetween APF and power grid and the characteristics of harmonic current,voltage balance among phaseswas achieved by controlling fifth-order zero-sequence voltage and global voltage stabilization was achievedby controlling the fundamental positive sequence active current. By adding active voltage vector of ACside in each H Bridge,
the voltage balance is achieved within one phase and finally each DC side voltageis balanced and stable. At the same time,the H-bridge cascaded APF compensates harmonic current andreduces distortion rate of the grid current. Validity of the method is verified by simulation and experimen-tal results under low voltage conditions,which can provide the basis for the application of the APF to ahigher voltage level.

References:

Memo

Memo:
-
Last Update: 2018-06-28