Repetitive-based controller for a UPS inverter to compensate unbalance and harmonic distortion
Article
Overview
Research
Identity
Additional Document Info
View All
Overview
abstract
This paper discusses a repetitive-based controller for an uninterruptible power supply (UPS) inverter. It is shown that a bank of resonant filters, used as a refinement term for harmonic compensation in earlier works, is equivalent to a repetitive scheme with a particular structure. The latter is implemented using a simple feedback array with a delay line, thus making the implementation relatively easy. More precisely, the repetitive scheme takes a negative feedback structure plus a feedforward path whenever the odd harmonics are considered for compensation only. The repetitive scheme, equivalent to the bank of resonant filters, acts as a refinement term to reject the harmonic distortion caused by the unbalanced and distorted load current, and thus, allowing the UPS inverter to deliver an almost pure sinusoidal balanced voltage. Experimental results in a 1.5 KVA three-phase inverter are included to show the performance of the proposed controller. © 2007 IEEE.
publication date
funding provided via
published in
Research
keywords
Delay lines; Harmonic distortion; Repetitive control; Uninterruptible power systems Electric currents; Electric delay lines; Electric distortion; Electric inverters; Electric loads; Harmonic distortion; Distorted load current; Harmonic compensation; Repetitive control; Repetitive-based controller; Uninterruptible power systems
Identity
Digital Object Identifier (DOI)
Additional Document Info
start page
end page
volume
issue