A fast dynamic DC-link power-balancing scheme for a PWMconverter-inverter system
Namho Hur
Jinhwan Jung
Kwanghee Nam
Dept. of Electr. Eng., Pohang Univ. of Sci. & Technol.;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug 2001
Volume: 48,
Issue: 4
On page(s): 794-803
ISSN: 0278-0046
References Cited: 8
CODEN: ITIED6
INSPEC Accession Number: 7007133
Digital Object Identifier: 10.1109/41.937412
Current Version Published: 2002-08-07
Abstract
The authors propose a new power converter control scheme for a
converter-inverter system. The strategy is to fully utilize the inverter
dynamics in controlling the converter dynamics. The authors obtain the
power dynamics for both converter and inverter systems, and control the
converter power so that it matches the required inverter power exactly.
Then, in the ideal case, no power flows through the DC-link capacitors
and, thus, the DC-link voltage does not fluctuate even though a very
small amount of the DC-link capacitance is used. In forcing the
converter power to match the inverter power, the authors utilize the
master-slave control concept. They control the DC-link voltage level
indirectly through the stored capacitor energy in order to exploit the
advantage of the linear dynamic behavior of the capacitor energy. This
helps them to circumvent a complex control method in regulating the
DC-link voltage. Through simulation and experimental results, the
superiority of the proposed converter control scheme is demonstrated
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