Open AccessDC‐bus voltage control of grid‐connected voltage source converter by using space vector modulated direct power control under unbalanced network conditions
Author(s) -
Xiao Lei,
Huang Shoudao,
Lu Kaiyuan
Publication year - 2013
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2012.0576
Subject(s) - control (management) , control theory (sociology) , voltage , power (physics) , vector control , power control , grid , computer science , space vector modulation , electrical engineering , electronic engineering , engineering , pulse width modulation , physics , mathematics , quantum mechanics , artificial intelligence , geometry , induction motor
Unbalanced grid voltage will cause large dc‐bus voltage ripple and introduce high harmonic current components on the grid side. This will severely threaten the safety of the grid‐connected voltage source converter (VSC) and consequently, affect the healthy operation condition of the load. In this study, a new proportional‐integral‐resonant (PI‐RES) controller‐based, space vector modulated direct power control topology is proposed to suppress the dc‐bus voltage ripple and in the same time, controlling effectively the instantaneous power of the VSC. A special ac reactive power reference component is introduced in the controller, which is necessary in order to reduce the dc‐bus voltage ripple and active power harmonics at the same time. The proposed control topology is implemented in the lab. Simulation and experimental results are provided to validate its performance and the analysis presented in this study.