A Discrete State-Space Control Scheme for Dynamic Voltage Restorers

He Lei; Xin-Chun Lin; Ming-Yu Xue; Yong Kang

A Discrete State-Space Control Scheme for Dynamic Voltage Restorers

Vol. 13, No. 3, pp. 400-408, May 2013

10.6113/JPE.2013.13.3.400

Dynamic voltage restorer

Feed-forward decoupling

One-beat delay

State feedback control

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Abstract

This paper presents a discrete state-space controller using state feedback control and feed-forward decoupling to provide a desirable control bandwidth and control stability for dynamic voltage restorers (DVR). The paper initially discusses three typical applications of a DVR. The load-side capacitor DVR topology is preferred because of its better filtering capability. The proposed DVR controller offers almost full controllability because of the multi-feedback of state variables, including one-beat delay feedback. Feed-forward decoupling is usually employed to prevent disturbances of the load current and source voltage. Directly obtaining the feed-forward paths of the load current and source voltage in the discrete domain is a complicated process. Fortunately, the full feed-forward decoupling strategy can be easily applied to the discrete state-space controller by means of continuous transformation. Simulation and experimental results from a digital signal processor-based system are included to support theoretical analysis.

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Cite this article

[IEEE Style]

H. Lei, X. Lin, M. Xue, Y. Kang, "A Discrete State-Space Control Scheme for Dynamic Voltage Restorers," Journal of Power Electronics, vol. 13, no. 3, pp. 400-408, 2013. DOI: 10.6113/JPE.2013.13.3.400.

[ACM Style]

He Lei, Xin-Chun Lin, Ming-Yu Xue, and Yong Kang. 2013. A Discrete State-Space Control Scheme for Dynamic Voltage Restorers. Journal of Power Electronics, 13, 3, (2013), 400-408. DOI: 10.6113/JPE.2013.13.3.400.