Abstract
A method is proposed for identifying the key transmission lines of a power grid. First, based on the theory of equal phase angle line and electrical distance, the phase angle partition areas are defined to partition the transmission lines. A generalized entropy index of the power flow growth rate is defined to evaluate the distribution of the degree of imbalance of the power flow impact after a transmission line outage. Second, based on the Katz–Bonacich Center theory, an index for evaluating the importance of the location of transmission lines is defined. Finally, the cloud model is used to transform the evaluation data information. The comprehensive evaluation results are presented in the form of cloud maps. The correctness of this method is verified by simulation.
Highlights
Thanks to continuous economic and technological developments, the demand for electricity is increasing, which is promoting the continuous expansion of the scale of power systems
The concept of phase angle division areas is defined based on the theory of equal phase line to divide the transmission lines
The ability to identify and protecting key transmission lines in a power system before accidents occur is beneficial for preventing electrical accidents and improving the security of the power system
Summary
Thanks to continuous economic and technological developments, the demand for electricity is increasing, which is promoting the continuous expansion of the scale of power systems. In [2], considering the interactive strengths among transmission lines under N-1 check, the improved structural hole theory is proposed to identify the vulnerable transmission line, in which the vulnerable transmission line identification in power grids are converted into key node evaluation in correlation networks. The concept of phase angle division areas is defined based on the theory of equal phase line to divide the transmission lines. The concept of the equal phase angle lines has been proposed based on the DC power flow model [20]. This concept is illustrated as follows: FIGURE 1. This paper comprehensively evaluates the key transmission lines from these three perspectives
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
