Power system security enhancement with unified power flow controller under multi-event contingency conditions

Ain Shams Engineering Journal

V.C. Veera Reddy¹  S. Ravindra²  S. Sivanagaraju³  Chintalapudi V. Suresh⁴ 

[1] EEE Department, AITS, Tirupati, A.P., India;EEE Department, QIS College of Engineering & Technology, Prakasam, 523272, India;EEE Department, UCEK, JNTUK, Kakinada, E.G.Dt, A.P. 533003, India;EEE Department, Vasireddy Venkatadri Institute of Technology, Nambur, Guntur, A.P, 522508, India;

关键词: Power system security;    Critical lines;    Sensitive generators;    System severity function;    Unified power flow controller;    Improved TLBO;   

DOI  :  10.1016/j.asej.2015.07.006

来源: DOAJ

【 摘 要 】

Power system security analysis plays key role in enhancing the system security and to avoid the system collapse condition. In this paper, a novel severity function is formulated using transmission line loadings and bus voltage magnitude deviations. The proposed severity function and generation fuel cost objectives are analyzed under transmission line(s) and/or generator(s) contingency conditions. The system security under contingency conditions is analyzed using optimal power flow problem. An improved teaching learning based optimization (ITLBO) algorithm has been presented. To enhance the system security under contingency conditions in the presence of unified power flow controller (UPFC), it is necessary to identify an optimal location to install this device. Voltage source based power injection model of UPFC, incorporation procedure and optimal location identification strategy based on line overload sensitivity indexes are proposed. The entire proposed methodology is tested on standard IEEE-30 bus test system with supporting numerical and graphical results.

【 授权许可】

Unknown