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Technical Brief

Hydropower Plant Load Frequency Control Via Second-Order Sliding Mode

[+] Author and Article Information
Xibei Ding

Department of Mechanical and Nuclear Engineering,
The Pennsylvania State University,
University Park, PA 16802
e-mail: ping04102@msn.com

Alok Sinha

Department of Mechanical and Nuclear Engineering,
The Pennsylvania State University,
University Park, PA 16802
e-mail: axs22@psu.edu

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received June 13, 2016; final manuscript received January 3, 2017; published online May 10, 2017. Assoc. Editor: Hashem Ashrafiuon.

J. Dyn. Sys., Meas., Control 139(7), 074503 (May 10, 2017) (5 pages) Paper No: DS-16-1313; doi: 10.1115/1.4035744 History: Received June 13, 2016; Revised January 03, 2017

Super-twisting algorithm, a second-order sliding mode control method, is studied for hydropower plant frequency control. Two versions of this algorithm are introduced in this paper. Simulation results from both of these second-order methods and regular sliding mode control are compared on the basis of system responses and control efforts. It is shown that the second-order sliding mode controller is able to reduce chattering effects associated with the regular sliding mode control and preserve the robustness of the regular sliding mode control as well.

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References

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Figures

Grahic Jump Location
Fig. 1

Sliding variable with regular (“sat” function) and second-order sliding mode control (both methods) under time-invariant disturbance

Grahic Jump Location
Fig. 2

Controller efforts from the first- and second-order sliding mode (both methods) under time-invariant disturbance

Grahic Jump Location
Fig. 3

Phase plane plot of second-order (both methods) sliding variable trajectories under time-invariant disturbance

Grahic Jump Location
Fig. 4

Frequency change (Δω¯) responses from the first- and second-order sliding mode control (both methods) under time-invariant disturbance

Grahic Jump Location
Fig. 5

Frequency change (Δω¯) responses from the first- and second-order (method 2) sliding mode control under time-invariant disturbance

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