Dynamic Performance Improvement of Diode–capacitor-Based High Step-up DC–DC Converter Through Right-Half-Plane Zero Elimination

Diode-capacitor-based dc-dc converters provide a simple and low cost solution for high step-up voltage regulation in solar and fuel cell generation. Transient modeling analysis reveals their worse influence of nonlinear and nonminimum-phase system characteristic due to right-half-plane (RHP) zero, e...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power electronics 2017-08, Vol.32 (8), p.6532-6543
Main Authors: Zhang, Yan, Liu, Jinjun, Dong, Zhuo, Wang, Hongliang, Liu, Yan-Fei
Format: Article
Language:English
Subjects:
Adaptive PI controller
Basic converters
Capacitors
Circuits
Computer simulation
Control systems design
Damping
DC-DC power converters
Design parameters
diode-capacitor network
Electric potential
Energy transfer
Fuel cells
high voltage gain
High voltages
Inductors
Integrated circuit modeling
Mathematical model
resistive-capacitive damping network
right-half-plane (RHP) zero
Transfer functions
Voltage control
Voltage converters (DC to DC)
Voltage gain
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:Diode-capacitor-based dc-dc converters provide a simple and low cost solution for high step-up voltage regulation in solar and fuel cell generation. Transient modeling analysis reveals their worse influence of nonlinear and nonminimum-phase system characteristic due to right-half-plane (RHP) zero, especially in high voltage gain application. However, the process of energy transfer for diode-capacitor-based dc-dc converter is different from basic dc-dc converter. Based on the unique feature, this paper proposes an improved main circuit structure with parallel connection of resistive-capacitive damping network across the intermediate capacitor to achieve good dynamic performance. By optimal parameter design according to Routh-Hurtwitz criterion, all the RHP zeros in the transfer function of control-to-output voltage are eliminated completely. Then, by the case of diode-capacitor-based boost converter, the adaptive PI controller is designed to deal with nonlinear characteristic of voltage gain. It gets good dynamic performance under wide range output voltage. All the theoretical findings and design approaches are verified by simulation and experiment results. The existing diode-capacitor-based high step-up dc-dc converters with slight main circuit modification are more promising in renewable energy application.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2016.2616411