High bandwidth voltage and current control design for voltage source converters

Ghosh, Arindam; Ledwich, G.

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Authors

Ghosh, Arindam

Ledwich, G.

Date

2010

Type

Conference Paper

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Citation

Ghosh, A. and Ledwich, G. 2010. High bandwidth voltage and current control design for voltage source converters, in - (ed), AUPEC 2010 - 20th Australasian Universities Power Engineering Conference: "Power Quality for the 21st Century", Dec 5 2010. Christchurch, New Zealand: Institute of Electrical and Electronics Engineers ( IEEE ).

Source Title

2010 20th Australasian Universities Power Engineering Conference (AUPEC 2010)

Source Conference

AUPEC 2010 - 20th Australasian Universities Power Engineering Conference: "Power Quality for the 21st Century"

Abstract

In this paper, two different high bandwidth converter control strategies are discussed. One of the strategies is for voltage control and the other is for current control. The converter, in each of the cases, is equipped with an output passive filter. For the voltage controller, the converter is equipped with an LC filter, while an output has an LCL filter for current controller. The important aspect that has been discussed the paper is to avoid computation of unnecessary references using high-pass filters in the feedback loop. The stability of the overall system, including the high-pass filters, has been analyzed. The choice of filter parameters is crucial for achieving desirable system performance. In this paper, the bandwidth of achievable performance is presented through frequency (Bode) plot of the system gains. It has been illustrated that the proposed controllers are capable of tracking fundamental frequency components along with low-order harmonic components. Extensive simulation results are presented to validate the control concepts presented in the paper.