Title :
Input-Output Linearization and Robust Sliding-Mode Controller for the VSC-HVDC Transmission Link
Author :
Moharana, Akshaya ; Dash, P.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, ON, Canada
fDate :
7/1/2010 12:00:00 AM
Abstract :
This paper presents a robust nonlinear controller for VSC-HVDC transmission link using input-output linearization and sliding mode-control strategy. The feedback linearization is used to cancel nonlinearities and the sliding mode control offers invariant stability to modeling uncertainties due to converter parameter changes, changes in system frequency, and exogenous inputs. Comprehensive computer simulations are carried out to verify the proposed control scheme under several system disturbances, such as changes in short-circuit ratio, converter parametric changes, and faults on the converter and inverter buses. Based upon the time-domain simulations in the MATLAB/SIMULINK environment, the proposed controller is tested.
Keywords :
HVDC power convertors; HVDC power transmission; control nonlinearities; fault diagnosis; feedback; linearisation techniques; nonlinear control systems; robust control; time-domain analysis; variable structure systems; MATLAB-SIMULINK environment; VSC-HVDC transmission link; computer simulations; converter parameter; converter parametric changes; feedback linearization; input-output linearization; invariant stability; modeling uncertainties; robust sliding-mode controller; short-circuit ratio; system disturbances; system frequency; time-domain simulations; Input–output linearization; nonlinear control; sliding mode control; voltage-source controller (VSC)–HVDC link;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2010.2042469
