NDLI: DC-link current estimation for load-side converter of brushless doubly-fed generator in the current feed-forward control

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DC-link current estimation for load-side converter of brushless doubly-fed generator in the current feed-forward control

Content Provider	IET Digital Library
Author	Wang, Xingwei Lin, Hua
Abstract	In the stand-alone brushless doubly-fed generator (BDFG) control system, there are two back-to-back converters composed of the machine-side converter (MSC) and the load-side converter (LSC). The LSC is a three-phase AC–DC pulse width modulation converter which usually adopts the double-loop control strategy with outer voltage loop and inner current loop. The introduction of the DC-link current feed-forward for improving the dynamic performance of the LSC can reduce the effect of the load disturbance to the system. However, the DC-link current has a complex harmonic spectrum with the MSC connected to the DC side, so its average value is not convenient to measure. This study presents a DC-link current estimation algorithm for the current feed-forward control in the LSC of the stand-alone BDFG. With the help of the equivalent circuit of the BDFG and the power balance, the rapid calculation of the average DC-link current can be estimated as well. With this estimation of the current instead of the actual DC-link current, the DC-link voltage and AC side current of the LSC can achieve stability quickly. The effectiveness and correction is validated by the simulation and experiments.
Starting Page	1703
Ending Page	1710
Page Count	8
ISSN	17554535
Volume Number	9
e-ISSN	17554543
Issue Number	Issue 8, Jun (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/9/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2015.0910
Journal	IET Power Electronics
Publisher Date	2016-06-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC-DC Power Converter Back-to-back Converter BDFG Control System Brushless Doubly-fed Generator Brushless Machines Complex Harmonic Spectrum Control of Electric Power System Current Control Current Feed-forward Control D.C. Machines DC Generators DC-link Current Estimation Algorithm Double-loop Control Strategy Electric Current Control Equivalent Circuit Inner Current Loop Load Disturbance Load-side Converter LSC Machine Control Machine-side Converter MSC Outer Voltage Loop PWM Power Converter Stability Stability in Control Theory Three-phase AC–DC Pulse Width Modulation Converter Voltage Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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