Identification of Key Transmission Lines Based on Super Efficiency Data Envelopment Analysis Model

Transmission lines are an important part of the power system. The selection of key transmission lines is conducive to the stable and safe operation of the transmission system. With the application of new technologies such as regional grid interconnection, wind power grid integration, and demand response, the internal structure and operating status of the power system are becoming more and more complicated. In view of this, this paper focuses on the comprehensive analysis and evaluation of key transmission line equipment, and proposes a comprehensive index calculation method based on the super-efficiency data envelopment analysis model to improve the key transmission line in the calculation of evaluation indicators. This paper also takes wind power and interruptible loads into consideration, uses situational awareness theory to divide the identification of key transmission lines into three phases: awareness phase, understanding phase, and prediction and presentation phase to evaluate and screen key transmission lines. Finally, taking the IEEE 24-node system as an example, the correctness and effectiveness of the method proposed in this paper are verified. The research work can provide useful references for system operators.