Protection and control systems analysis of industrial plants with synchronous generators during islanded operation

Author(s)

Fernanda Caseño Trindade Arioli

• Document type: Doctoral Thesis
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Elétrica e de Computação
• Defense date: 2013-10-31

Examining board members

Walmir de Freitas Filho; Jose Roberto Sanches Mantovani; Tatiana Mariano Lessa de Assis; Carlos Alberto de Castro Junior; Fujio Sato

• Advisor: Walmir de Freitas Filho

Abstract

Nowadays, loads from different classes of customers have become more sensitive to variations and interruptions from power supply. Frequently, failures in electrical energy delivery are caused by occurrences of faults in distribution systems. Such faults decrease the reliability of power delivery, increase operational costs and may result in power quality problems, such as voltage sag, short or long term outages. Since the customers consciousness is increasing, the need of efficient solutions to improve reliability and power quality indices is also increasing. One of the most efficient approaches to improve such indices in distribution systems is to develop fast and accurate fault location techniques for aerial feeders. Even though fault location methods dedicated to distribution feeders are still rudimentary, the recent integration of measurement, communication, real time knowledge of feeder configuration and reclosers trip and Geographic System Information allows the development of more efficient solutions, which explores information from different places from the grid (distributed information) and not only from the substation. In this context, this work explores fault location methods based on voltage measurements applied to modern distribution systems. Three methods were investigated: (1) the first one is based on matching voltage values, this method requires the network electrical parameters and two or more voltage meters installed along the feeder; (2) the second method is based on the correspondence of fault current, this method uses the network electrical parameters and a higher quantity of meters than the first method; (3) finally, the third method is based on the identification of low voltage zones, this method does not require network electrical parameters, however it needs a higher quantity of voltage meters than the other two methods. The test results show that according to the voltage measurement availability along the feeder, one of these methods can be chosen to efficiently locate the fault (AU)

• FAPESP's process: 09/11859-7 - DEVELOPMENT OF INTELLIGENT METHODS FOR FAULT LOCATION IN MODERN POWER DISTRIBUTION SYSTEM
• Grantee: Fernanda Caseño Trindade Arioli
• Support Opportunities: Scholarships in Brazil - Doctorate