Mladen Kezunovic

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Earlier work at Texas A&M University led to the development of transmission line fault location algorithms that were based on synchronized sampling of the voltage and current data from the two ends of the line. The line models used in the algorithms were based on lumped parameter models for electrically short lines, or lossless distributed parameter models(More)
Prompt and accurate location of the faults in a largescale transmission system is critical when system reliability is considered and usually is the first step in the system restoration. The accuracy of fault location estimation essentially depends on the information available. While there have been some successful algorithms for fault location utilizing(More)
A fault location algorithm for distribution feeders based on matching during-fault voltage sags is presented. The basic principle of the algorithm is based on the fact that when a fault occurs on the feeder, voltage sags propagate presenting different characteristics for each feeder node. Knowing the voltage sag characteristics, it is possible to locate the(More)
This paper proposes an integrated real time fault analysis tool for transmission line. The two primary techniques used in the fault analysis tool, uzzy adaptive resonance theory (ART) neural network and synchronized sampling, can offer accurate fault detection, classification, internal/external ault differentiation, and fault location. The paper makes(More)
This paper introduces a new analysis method for early detection and prevention of power system cascading events. It uses the vulnerability index (VI) and margin index (MI) to evaluate the vulnerability and security of the individual system parts, as well as the whole system during an operating state. It identifies the vulnerable parts of the power system(More)
Relay misoperations play an important role in cascading blackouts. Power swing and out-of-step conditions caused by large disturbances in the system may result in relay misoperations. This effect is analyzed and simulated in this paper. Synchronized sampling based fault location (SSFL) algorithm was proposed as part of an advanced fault analysis tool to(More)
This paper introduces a new concept of advanced power quality assessment. The concept is implemented using the software for event detection, classification and characterization. The role of the modeling and simulation in the power quality assessment is also discussed. The use of the field recorded data and simulated data in the equipment performance(More)
This paper gives an overview of future requirements for fault and disturbance analysis. Special attention is given to the issues of the extent of analysis, data integration, information exchange, speed of processing, database needs, dissemination of analysis results and related user interface, and support through existing and new standards. Selecting(More)