Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (8): 140-145.doi: 10.3969/j.issn.1000-565X.2011.08.026

• Power & Electrical Engineering • Previous Articles     Next Articles

Parameter Optimization Design of PSS Based on Functional Sensitivity

Xue Zhen-yu1  Fang Da-zhong1  Yuan Shi-qiang2   

  1. 1. Key Laboratory of Power System Simulation and Control of Ministry of Education,Tianjin University,Tianjin 300072,China; 2. Technology Center,Tianjin Electric Power Corporation,Tianjin 300022,China
  • Received:2010-07-29 Revised:2010-12-17 Online:2011-08-25 Published:2011-07-06
  • Contact: 薛振宇(1983-) ，男，博士，主要从事电力系统动态安全分析研究． E-mail:banditxue@163.com
  • About author:薛振宇(1983-) ，男，博士，主要从事电力系统动态安全分析研究．
  • Supported by:

    国家自然科学基金资助项目( 50777046) ; 国家"973”计划项目( 2009CB219700)

PDF

866

Abstract:

Proposed in this paper is a new conjugate gradient approach for the coordination of the power system stabilizer ( PSS) parameter optimization of multi-machine power system. In this approach,combination functional index is introduced as a performance index to evaluate the damping effect of PSS,the integral term of the index is dealt with by means of the variational method,and a backward trajectory integration approach is put forward to calculate the gradient of the index to the PSS parameter vector. Moreover,minimizing the index is taken as the objective function of the optimization model of the PSS parameter,and the objective function considers the nonlinear features of big disturbance of the power system,so that the optimized PSS can improve the small-disturbance stability of the power system and efficiently damp the power oscillation caused by large disturbances. In addition,the practicality and effectiveness of the proposed method are verified on IEEE 4-generator 2-area and IEEE 10-generator New England test systems.

Key words: power system stabilizer, backward trajectory integration, conjugate gradient optimization method, parameter optimization