Voltage and Current-Programmed Modes in Control of the Z-Source Converter

The Z-source converter (ZSC) is an alternative power conversion topology that can both buck and boost the input voltage using passive components with improved reliability. Dynamic modeling of the ZSC from different perspectives has been studied. So far, based on these models, the dc-link voltage is...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on industry applications 2010-03, Vol.46 (2), p.680-686
Main Authors: Sen, G., Elbuluk, M.E.
Format: Article
Language:English
Subjects:
Boost control
Capacitors
Compensators
Control equipment
Converters
current-programmed mode (CPM)
Dynamical systems
Dynamics
Electric potential
Industry Applications Society
Mathematical models
Open loop systems
Power conversion
Studies
Switches
Topology
Virtual colonoscopy
Virtual manufacturing
Voltage
Voltage control
Voltage measurement
voltage mode (VM)
Z-source converter (ZSC)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Z-source converter (ZSC) is an alternative power conversion topology that can both buck and boost the input voltage using passive components with improved reliability. Dynamic modeling of the ZSC from different perspectives has been studied. So far, based on these models, the dc-link voltage is controlled using direct measurement, or through measurement of the capacitor voltage. In this paper, two methods of dc-link voltage control of ZSC are analyzed and compared. Both methods are based on measuring the input voltage and state variables of the ZSC and designing a compensator based on the converter state space averaged model. Voltage mode (VM) and current-programmed mode (CPM) controls are derived based on the ideal small-signal model of the Z-source network with inductive loading. Nonminimum phase characteristics caused by the right half-plane zero in the control-to-capacitor-voltage transfer function are minimized by designing proper compensators in both VM and CPM controls. In CPM, since the order of the system reduces by one, it is possible to achieve similar dynamic performance with a simpler compensator. Performance of both control methods of the compensated ZSC are verified by simulation and experimental results for input and load disturbances.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2010.2040054