In distribution power systems, these are many lines and equipment. Therefore, a lot of time and work are required to find the fault points when a power failure is occurred in a distribution line. This paper focuses on a cause estimation method of faults to assist finding a fault point. Specifically, this paper proposes an estimation method based on a statistical analysis to improve estimation a...

The inspection of high voltage power lines is an important task in order to prevent failure of the transmission system. In this work, we present a novel approach to detect insulators in aerial images and to analyze them automatically for possible faults. Our detection algorithm is based on discriminative training of local gradient-based descriptors and a subsequent voting scheme for localizatio...

A novel algorithm based on Genetic approach for diagnosing Bridging faults, Transitional Delay faults and stuck at faults in LSI circuits is presented. The method of devising a universal set for detecting Bridging faults in testable circuits is investigated. We outline a method that utilizes the information from the stuck-at fault model to accurately diagnose the bridging faults that affect two...

Abstract—In this paper, the diagnosis of soft faults in lossy electric transmission lines is studied through the inverse scattering approach. The considered soft faults are modeled as continuous spatial variations of distributed characteristic parameters of transmission lines. The diagnosis of such faults from reflection and transmission coefficients measured at the ends of a line can be formul...

In modern digital power system protection systems, statistical coefficients technique is recently used for fault analysis. A correlation technique is developed for faults detection and discrimination. The proposed technique is able to accurately identify the condition of phase(s) involved in all ten types of shunt faults that may occur in extra high-voltage transmission lines under different fa...

In a power system, a contingency refers to an outage of power system components such as transformers, generators, lines, etc. due to faults or failure. A contingency could lead to voltage and power flow problems. This paper describes practical contingency studies based on a real power system provided by a utility. The aim of this study is to find out contingencies that cause undervoltage, overv...

The hybrid dc circuit breaker (HCB) has the advantages of fast action speed and low operating loss, which is an ideal method for fault isolation multi-terminal grids. For grids that transmit power through overhead lines, HCBs are required to have reclosing capability due high probability fact most faults temporary faults. To avoid secondary strike equipment damage may be caused by HCB when perm...