Study on Approach of Static Security Assessment Accounting for Electro-thermal Coupling

Mengxia Wang, Hongbin Sun, Jinxin Huang, Qiang Zhang

Dept. of Electrical Engineering, Tsinghua University, Beijing, China.
Shandong Electric Power Dispatching and Control Center, Jinan, China.
State Grid of China Technology College, Jinan, China.

DOI: 10.4236/epe.2013.54B136                

Abstract

A static security assessment approach considering electro-thermal coupling of transmission lines is proposed in this paper. Combined with the dynamic thermal rating technology and energy forecasting, the approach can track both the electrical variables and transmission lines’ temperature varying trajectory under anticipated contingencies. Accordingly, it identifies the serious contingencies by transmission lines’ temperature violation rather than its power flow, in this case the time margin of temperature rising under each serious contingency can be provided to operators as warning information and some unnecessary security control can also be avoided. Finally, numerical simulations are carried out to testify the validity of the proposed approach.

Keywords

Power System; Dynamic Thermal Rating; Static Security Assessment; Transmission Line; Electro-thermal Coupling

Conflicts of Interest

The authors declare no conflicts of interest.

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