Lyapunov-Krasovskii functional based power system stability analysis in environment of WAMS  

作　　者：李婷 吴敏 何勇 

机构地区：[1]School of Information Science and Engineering,Central South University

出　　处：《Journal of Central South University》2010年第4期801-806,共6页中南大学学报（英文版）

基　　金：Projects(60425310,60974026) supported by the National Natural Science Foundation of China;Project(200805330004) supported by the Doctor Subject Foundation of China;Projects(NCET-06-0679) supported by Program for New Century Excellent Talents in University;Project(08JJ1010) supported by the Natural Science Foundation of Hunan Province,China

摘　　要：In order to analyze power system stability in environment of WAMS(wide area measurement system),a new steady state stability model with time-varying delay was proposed for power system.The factors of exciter and power system stabilizer with delay were introduced into analytical model.To decrease conservativeness of stability analysis,an improved Lyapunov-Krasovskii functional was constructed,and then a new delay-dependent steady state stability criterion for power system,which overcomes the disadvantages of eigenvalue computation method,was derived.The proposed model and criterion were tested on synchronous-machine infinite-bus power system.The test results demonstrate that Lyapunov-Krasovskii functional based power system stability analysis method is applicable and effective in the analysis of time delay power system stability.In order to analyze power system stability in environment of WAMS （wide area measurement system）, a new steady state stability model with time-varying delay was proposed for power system. The factors of exciter and power system stabilizer with delay were introduced into analytical model. To decrease conservativeness of stability analysis, an improved Lyapunov-Krasovskii functional was constructed, and then a new delay-dependent steady state stability criterion for power system, which overcomes the disadvantages of eigenvalue computation method, was derived. The proposed model and criterion were tested on synchronousmachine infinite-bus power system. The test results demonstrate that Lyapunov-Krasovskii functional based power system stability analysis method is applicable and effective in the analysis of time delay power system stability.

关 键 词：power system steady state stability time-varying delay power system stabilizer 

分 类 号：TM712[电气工程—电力系统及自动化]