JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2016, Vol. 46 ›› Issue (2): 64-71.doi: 10.6040/j.issn.1672-3961.0.2016.011

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Multi-machine power system excitation control based on continuous higher-order sliding mode

LIU Xiangjie1, HAN Yaozhen1,2*   

  1. 1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing 102206, China;
    2. School of Information Science and Electrical Engineering, Shandong Jiaotong University, Jinan 250357, Shandong, China
  • Received:2016-01-08 Online:2016-04-20 Published:2016-01-08

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Abstract: A continuous higher-order sliding mode excitation control strategy was proposed for improving transient stability of multi-machine power system. Each power angle deviation was chosen as sliding variable. Higher-order sliding mode control for nonlinear and uncertain multi-machine power system was converted to finite time stability problem of uncertain integral chain. The controller was composed of geometric homogeneous continuous control law and second-order sliding mode super-twisting algorithm to achieve finite time convergence and conquer system uncertainties. The derivatives of power angles were estimated by so-called exact robust differentiator. Finite time stabilization of closed-loop system was theoretically proved. The proposed excitation control scheme could stabilize terminal voltage and enhance transient stability effectively. Simulation results for a three-machine system verified the validity of the proposed control method.

Key words: higher-order sliding mode, multi-machine power system, super-twisting algorithm, transient stability, excitation control

CLC Number: 

  • TP273
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