Three-phase power quality compensator under the unbalanced sources and nonlinear loads
Lin, B.-R.
Yung-Chuan Lee
Dept. of Electr. Eng., Nat. Yunlin Univ. of Sci. & Technol., Taiwan;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct. 2004
Volume: 51,
Issue: 5
On page(s): 1009- 1017
ISSN: 0278-0046
INSPEC Accession Number: 8135778
Digital Object Identifier: 10.1109/TIE.2004.834960
Current Version Published: 2004-10-04
Abstract
A three-phase voltage-source inverter for a power quality compensator under the unbalanced mains and nonlinear loads is proposed to provide balanced three-phase source current and improve input power factor. The proposed converter is based on the conventional three-phase voltage-source inverter with three additional ac power switches to achieve three-level pulsewidth modulation. The voltage stress of three ac power switches is clamped to half the dc-link voltage. The balanced reference mains currents are estimated using the dc-bus voltage and load currents. A proportional-integral voltage controller is used in the outer loop to compensate the switching losses of the voltage-source inverter. To perform the integrated power quality compensation, a hysteresis current control scheme is adopted to track the balanced line current command in phase with mains voltage. Three voltage levels are generated on the ac terminal of the proposed inverter. Computer simulation and experimental results are provided to verify the effectiveness of the proposed control scheme.
Index
Terms
Available to subscribers and IEEE members.
References
Available to subscribers and IEEE members.
Citing Documents
Available to subscribers and IEEE members.
Cart
