Broken Conductor Fault Detection using Symmetrical Components in Distribution Power Systems - An Implementation Case

2021 ◽  
Author(s):  
Diogo Vinicius Joao ◽  
Hamilton G. B. Souza ◽  
Marcos A. Izumida Martins
Keyword(s):  
Fault Detection ◽  
Power Systems ◽  
Symmetrical Components

Fault Detection and Isolation in Power Systems Using Unknown Input Observer

2019 ◽  
pp. 38-58 ◽  
Author(s):  
Hassan Haes Alhelou
Keyword(s):  
Fault Detection ◽  
Power Systems ◽  
Frequency Control ◽  
Load Frequency Control ◽  
Fault Detection And Isolation ◽  
Unknown Input ◽  
Unknown Input Observer ◽  
Control Loops ◽  
Interconnected Power Systems ◽  
Unknown Disturbance

Unknown input observers (UIO) find application in many cases for successful fault detection and isolation (FDI). In this chapter, a scenario where the unknown input observer is applied to load frequency control loops in interconnected power systems is analyzed. A UIO was chosen because load demand is not always constant and it can be considered to introduce an unknown disturbance to the system. Mathematical formulations on how to detect and isolate sensor faults are presented which are then implemented in MATLAB Simulink for simulations. Based on this historical survey on the application of UIO, a thesis on UIO application in FDI in distributed generation is done.

scholarly journals Review and Performance Evaluation of Photovoltaic Array Fault Detection and Diagnosis Techniques

2019 ◽  
Vol 2019 ◽  
pp. 1-19 ◽  
Author(s):  
Albert Yaw Appiah ◽  
Xinghua Zhang ◽  
Ben Beklisi Kwame Ayawli ◽  
Frimpong Kyeremeh
Keyword(s):  
Fault Detection ◽  
Power Systems ◽  
Hot Spot ◽  
Fault Detection And Diagnosis ◽  
Economic Returns ◽  
Photovoltaic Array ◽  
Pv Array ◽  
Detection And Diagnosis ◽  
And Performance ◽  
Reliable Power Supply

The environmentally clean nature of solar photovoltaic (PV) technology causes PV power generation to be embraced by all countries across the globe. Consequently, installation and utilization of PV power systems have seen much growth in recent years. Although PV arrays of such systems are robust, they are not immune to faults. To guarantee reliable power supply, economic returns, and safety of both humans and equipment, highly accurate fault detection, diagnosis, and interruption devices are required. In this paper, an overview of four major PV array faults and their causes are presented. Specifically, ground fault, line-line fault, arc fault, and hot spot fault have been covered. Next, conventional and advanced fault detection and diagnosis (FDD) techniques for managing these faults are reviewed. Moreover, a single evaluation metric has been proposed and utilized to evaluate the performances of the advanced FDD techniques. Finally, based on the papers reviewed, PV array fault management future trends and possible recommendations have been outlined.

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