Global ETD Search

1	Cyber security in power systems Sridharan, Venkatraman 06 April 2012 (has links) Many automation and power control systems are integrated into the 'Smart Grid' concept for efficiently managing and delivering electric power. This integrated approach created several challenges that need to be taken into consideration such as cyber security issues, information sharing, and regulatory compliance. There are several issues that need to be addressed in the area of cyber security. Currently, there are no metrics for evaluating cyber security and methodologies to detect cyber attacks are in their infancy. There is a perceived lack of security built into the smart grid systems, but there is no mechanism for information sharing on cyber security incidents. In this thesis, we discuss the vulnerabilities in power system devices, and present ideas and a proposal towards multiple-threat system intrusion detection. We propose to test the multiple-threat methods for cyber security monitoring on a multi-laboratory test bed, and aid the development of a SCADA test bed, to be constructed on the Georgia Tech Campus. Cyber security SCADA NERC PLA Electric power distribution Cyberterrorism Computer security Computer networks Security measures
2	Steady-State Analysis in Transmission System Planning per Latest TPL-001-4 NERC Standard Ayala Zelaya, Marcos Alexander 19 January 2016 (has links) Several cascading outages that have occurred in the past have shown the importance of performing appropriate and coordinated transmission system planning between the different Planning Coordinators and Transmission Planners in a power system. In very large, interconnected systems, this coordinated planning is necessary due to the inherent complexity that characterizes non-lineal electric power systems. A major task in transmission system planning is to conduct contingency studies that would determine the consequences in the system when single or multiple of its elements trip due to failure or are disconnected during scheduled maintenance outages. This work develops general programs aimed at facilitating the performance of such contingency studies based on the latest Transmission System Planning Performance Requirement standard issued by NERC, TPL-001-4. The focus of this work is on the requirements for the steady state analysis described in the standard, which includes specific steady state performance planning events. The developed programs have been tested in a few base cases and have demonstrated their ability to facilitate contingency studies with any system regardless of its size. / Master of Science electric power systems transmission system planning steady-state contingencies NERC TPL-001-4
3	Polar vortex and generation fuel diversity Hayat, Hassan January 1900 (has links) Master of Science / Department of Electrical and Computer Engineering / Anil Pahwa / The unusual weather events during the polar vortex of 2014 illuminated the needs for fuel diversity for power generation in order to allow reliable operation of the electricity grid. A system wide reliability assessment for winter months should be undertaken in addition to the summer months to ensure reliable operation of the electricity grid throughout the year. Severe weather conditions that lead to equipment malfunction during the polar vortex should be thoroughly investigated and remediations to ensure satisfactory future performance of the grid must be undertaken. Environmentally unfriendly emissions from power plants must be minimized but diversity of generation fuel must be maintained. Future energy policies must be formulated with consideration that approximately 14 GW of coal generation in Pennsylvania Jersey Maryland Regional Transmission Organization’s control area available during the polar vortex will be retired by 2015 and replaced with plants that utilize fuel types other than coal. Coal generation retirement Electric grid Power generation fuel diversity Polar vortex Electrical Engineering (0544)
4	Conversational Engine for Transportation Systems Sidås, Albin, Sandberg, Simon January 2021 (has links) Today's communication between operators and professional drivers takes place through direct conversations between the parties. This thesis project explores the possibility to support the operators in classifying the topic of incoming communications and which entities are affected through the use of named entity recognition and topic classifications. By developing a synthetic training dataset, a NER model and a topic classification model was developed and evaluated to achieve F1-scores of 71.4 and 61.8 respectively. These results were explained by a low variance in the synthetic dataset in comparison to a transcribed dataset from the real world which included anomalies not represented in the synthetic dataset. The aforementioned models were integrated into the dialogue framework Emora to seamlessly handle the back and forth communication and generating responses. Natural Language Processing Topic Classification Named Entity Classification NLP NER NERC
5	Emissionen aus der Rinderhaltung: Erfassung von Emissionen aus diffusen Quellen der Rinderhaltung Deichmann, Jennifer, Heidenreich, Thomas, Lippmann, Jens, Kath, Horst-Günter, Fröhlich, Marc, Rothe, Frank 02 July 2020 (has links) Die Emissionen von Tierhaltungsanlagen sind relevant für Genehmigungsverfahren sowie für die Einhaltung nationaler Emissionshöchstmengen. Hier erhalten vor allem die Ammoniakemissionen zusätzliche Relevanz durch die Anforderungen der NERC-Richtlinie, in der die bereits überschrittenen Reduktionsverpflichtungen für Ammoniak von 2001 weiter verschärft wurden. Die Landwirtschaft trägt mit ca. 95 % zu den deutschen Ammoniakemissionen bei. Als Hauptverursacher ist hier die Düngung mit 53 % zu nennen, gefolgt von der Rinderhaltung mit 19 %. Um die hohen Emissionen bei der Ausbringung zu reduzieren, wurden in der neuen Düngeverordnung emissionsarme Ausbringtechniken sowie die schnelle Einarbeitung festgelegt. Um die Emissionen aus der Rinderhaltung zu reduzieren, gibt es zurzeit nur wenige praxistaugliche Maßnahmen. Redaktionsschluss: 20.05.2020 info:eu-repo/classification/ddc/333.7 ddc:333.7
6	Global Sensitivity Analysis of Inverter-Based Resources for Bulk Power System Dynamic Studies Guddanti, Balaji January 2022 (has links) No description available. Electrical Engineering Energy
7	A Wide-Area Perspective on Power System Operation and Dynamics Gardner, Robert Matthew 23 April 2008 (has links) Classically, wide-area synchronized power system monitoring has been an expensive task requiring significant investment in utility communications infrastructures for the service of relatively few costly sensors. The purpose of this research is to demonstrate the viability of power system monitoring from very low voltage levels (120 V). Challenging the accepted norms in power system monitoring, the document will present the use of inexpensive GPS time synchronized sensors in mass numbers at the distribution level. In the past, such low level monitoring has been overlooked due to a perceived imbalance between the required investment and the usefulness of the resulting deluge of information. However, distribution level monitoring offers several advantages over bulk transmission system monitoring. First, practically everyone with access to electricity also has a measurement port into the electric power system. Second, internet access and GPS availability have become pedestrian commodities providing a communications and synchronization infrastructure for the transmission of low-voltage measurements. Third, these ubiquitous measurement points exist in an interconnected fashion irrespective of utility boundaries. This work offers insight into which parameters are meaningful to monitor at the distribution level and provides applications that add unprecedented value to the data extracted from this level. System models comprising the entire Eastern Interconnection are exploited in conjunction with a bounty of distribution level measurement data for the development of wide-area disturbance detection, classification, analysis, and location routines. The main contributions of this work are fivefold: the introduction of a novel power system disturbance detection algorithm; the development of a power system oscillation damping analysis methodology; the development of several parametric and non-parametric power system disturbance location methods, new methods of power system phenomena visualization, and the proposal and mapping of an online power system event reporting scheme. / Ph. D. TDOA FNET FDR GPS Wide-Area monitoring wide-area measurements power system event power system load shedding generation trip eastern interconnection wams ems nerc ercot wecc parzen window interconnection islanding PMU half-plane method least squares event trigger generation-load mismatch electromechanical wave wave propagation time delay of arrival oscillation trigger modal analysis electric grid transmission network transmission system hypocenter frequency matrix pencil mahalanobis distance

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