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Transient Stability Assessment Using Individual Machine Equal Area Criterion PART I: Unity Principle
Wang Songyan * #,Yu Jilai,Zhang Wei
School of Electrical Engineering and Automation, Harbin Institute of Technology
*Correspondence author
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Funding: none
Opened online:14 July 2017
Accepted by: none
Citation: Wang Songyan,Yu Jilai,Zhang Wei.Transient Stability Assessment Using Individual Machine Equal Area Criterion PART I: Unity Principle[OL]. [14 July 2017] http://en.paper.edu.cn/en_releasepaper/content/4738525
 
 
Analyzing system trajectory from the perspective of individual machines provides a non-global angle to analyze the transient stability of power systems. This two-paper series propose a direct-time-domain method that is based on the individual-machine equal area criterion. In the first paper, by examining the mapping between the trajectory and power-vs-angle curve of an individual machine, the stability property to characterize a critical machine is clarified. The mapping between the system trajectory and individual-machine equal area criterion is established. Furthermore, a unity principle between the individual-machine stability and system stability is proposed. It is proved that the instability of the system can be confirmed by finding any one unstable critical machine, thence, the transient stability of a multimachine system can be monitored non-globally in online transient stability assessment.
Keywords:Transient stability; equal area criterion; individual machine energy function; partial energy function
 
 
 

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