Improving the Dynamic Performance of Distribution Electronic Power Transformers Using Sliding Mode Control

Rahmat-Allah Hooshmand; Mohammad Ataei; Mohammad Hosein Rezaei

Improving the Dynamic Performance of Distribution Electronic Power Transformers Using Sliding Mode Control

Rahmat-Allah Hooshmand

Mohammad Ataei

Mohammad Hosein Rezaei

Vol. 12, No. 1, pp. 145-156, Jan. 2012

10.6113/JPE.2012.12.1.145

Distribution electronic power transformer (DEPT)

Dynamic performance

Linear quadratic regulator (LQR)

PI controller

Sliding mode control (SMC) and State space model

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Abstract

These days, the application of electronic power transformers (EPTs) is expanding in place of ordinary power transformers. These transformers can transmit power via three or four wire converters. Their dynamic performance is extremely important, due to their complex structure. In this paper, a new method is proposed for improving the dynamic performance of distribution electronic power transformers (DEPT) by using sliding mode control (SMC). Hence, to express the dynamic characteristics of a system, different factors such as the voltage unbalance, voltage sag, voltage harmonics and voltage flicker in the system primary side are considered. The four controlling aims of the improvement in dynamic performance include: 1) maintaining the input currents so that they are in sinusoidal form and in phase with the input voltages so they have a unity power factor, 2) keeping the dc-link voltage within the reference amount, 3) keeping the output voltages at a fixed amount and 4) keeping the output voltages in sinusoidal and symmetrical forms. Simulation results indicate the potential and capability of the proposed method in improving DEPT behavior.

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Cite this article

[IEEE Style]

R. Hooshmand, M. Ataei, M. H. Rezaei, "Improving the Dynamic Performance of Distribution Electronic Power Transformers Using Sliding Mode Control," Journal of Power Electronics, vol. 12, no. 1, pp. 145-156, 2012. DOI: 10.6113/JPE.2012.12.1.145.

[ACM Style]

Rahmat-Allah Hooshmand, Mohammad Ataei, and Mohammad Hosein Rezaei. 2012. Improving the Dynamic Performance of Distribution Electronic Power Transformers Using Sliding Mode Control. Journal of Power Electronics, 12, 1, (2012), 145-156. DOI: 10.6113/JPE.2012.12.1.145.