A Smart Online Over-Voltage Monitoring and Identification System

Energies

Jing Wang¹  Qing Yang¹  Wenxia Sima¹  Tao Yuan¹ 

[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China; E-Mails:

关键词: smart grid;    over-voltage;    identification;    S-transform;    fuzzy expert system;   

DOI  :  10.3390/en4040599

来源: mdpi

【 摘 要 】

This paper proposes a complete and effective smart over-voltage monitoring and identification system. In recent years, smart grids are of the greatest interest in power system research. One of the main features of smart grid is their self-healing, which can continuously carry out online self-evaluation, discover existing faults, and correct them immediately. The over-voltage smart monitoring-identification-suppression systems play a key role in the construction of self-healing grids. In this paper, eight kinds of common over-voltage are discussed and analyzed. The S-transform algorithm is used to extract features of over-voltage. Aiming at the main features of each kind of over-voltage, six different characteristic quantities are proposed. A well designed fuzzy expert system and a support vector machine are employed as the classifiers to build a two-step identification model. The accuracy of the identification system is verified by field records. Results show that this system is feasible and promising for real applications.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.