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Discrete-Time Nonlinear Control of VSC-HVDC System

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  • TianTian Qian
  • ShiHong Miao

Abstract

Because VSC-HVDC is a kind of strong nonlinear, coupling, and multi-input multioutput (MIMO) system, its control problem is always attracting much attention from scholars. And a lot of papers have done research on its control strategy in the continuous-time domain. But the control system is implemented through the computer discrete sampling in practical engineering. It is necessary to study the mathematical model and control algorithm in the discrete-time domain. The discrete mathematical model based on output feedback linearization and discrete sliding mode control algorithm is proposed in this paper. And to ensure the effectiveness of the control system in the quasi sliding mode state, the fast output sampling method is used in the output feedback. The results from simulation experiment in MATLAB/SIMULINK prove that the proposed discrete control algorithm can make the VSC-HVDC system have good static, dynamic, and robust characteristics in discrete-time domain.

Suggested Citation

  • TianTian Qian & ShiHong Miao, 2015. "Discrete-Time Nonlinear Control of VSC-HVDC System," Mathematical Problems in Engineering, Hindawi, vol. 2015, pages 1-11, June.
    • Handle: RePEc:hin:jnlmpe:929467
    DOI: 10.1155/2015/929467
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