Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 58 for “"substations"”.
-
Design and standardization of high tension outdoor substations
Made available in DSpace on 2017-11-30T22:11:20Z (GMT). No. of bitstreams: 2 5999924.pdf: 5204272 bytes, checksum: a268575d29bd7f25e5f2e416a5cb8e12 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1918
-
The Future of Substations: Centralized Protection and Control
Modern power substations continue to use hardware that is dated and resistant to modernization. This document discusses the basics of substations, identifies their weaknesses, and suggests a method of improvement. This suggestion implements a centralized protection and control system to make the …
-
Efficient management of environmental control within electrical substations for decarbonisation purposes
… efforts have been made to decarbonise electrical substations. Electrical substations are critical infrastructure assets that house distribution equipment enabling electricity to reach customers’ homes and business premises. To reduce the risk of damage to distribution equipment environmental, …
-
The excitation of UHF signals by partial discharge in gas insulated substations
… discharge (PD) sources inside gas insulated substations (GIS). PD is indicative of defects in the insulation system and by using couplers mounted at intervals along the GIS, the corresponding bursts of UHF signal can be extracted. This is the principle of the UHF monitoring technique used for …
-
Harvesting energy from electric fields for powering wireless sensors within air-insulated substations
… in high voltage plants, such as air-insulated substations. Advances in technology have been reducing the power consumption of wireless sensors. Harvesting energy from the electric fields could be a viable way of supplying power to the wireless sensors if the technical challenges can be …
-
Detecting Zero-Day Attacks in IEC-61850 based Digital Substations via In-Context Learning
… of detecting novel/zero-day attacks in digital substations that employ the IEC-61850 communication protocol. While many heuristic and ML-based methods have been proposed for attack detection in IEC-61850 digital substations, generalization to novel or zero-day attacks remains challenging. We …
-
Critical Substation Risk Assessment and Mitigation
Substations are joints in the power system that represent nodes that are vital to stable and reliable operation of the power system. They contrast the rest of the power system in that they are a dense combination of critical components causing all of them to be simultaneously vulnerable to one …
-
The Remote Measurement of Phase Angle
… it is necessary to link the outputs of substations, which may be many miles apart. In order to prevent an excessive surge of current in the connecting link, the connection between a pair of substations should not be made until the phase angle between their voltages is small, There has …
-
Study and implementation of load monitoring on an 11 kV underground cable distribution network
… system needed to be installed at protected substations forming part of an 11 kV underground cable reticulation network. Load information was currently only available from feeders connected to the 132/11 kV stepdown substations which provide infeeds to the system. The staff felt that the …
-
Recuperation of Regenerative Braking Energy in Electric Rail Transit Systems
… using wayside energy storage, reversible substations, or hybrid storage/reversible substation systems. In this research study, we compare these recuperation techniques and investigate their application in New York City Transit (NYCT) systems, where most of the regenerative braking energy …
-
Substations: landscape guidelines for site selection, design, construction and maintenance : this study [dissertation] is submitted in partial fulfilment of the requirements for the Diploma of Landscape Architecture, Lincoln College, University of Canterbury
… stations, high-voltage transmission lines and substations which function either as switching station, points of supply, or both. Power is delivered in bulk to points of supply, where the voltage is stepped down, and it is sold to the local supply authority for distribution to consumers. A …
-
Seismic response of transformer bushing systems and their rehabilitation using frictional pendulum system
… is considered for rehabilitation of existing substations or the mitigation of the seismic requirements for new substations. Results of parametric and experimental study are presented. A simplified model of a transformer with its appendages developed for use in engineering offices is developed …
-
Implementation of Secure DNP3 Architecture of SCADA System for Smart Grids
… transmission, distribution, and customer substations are connected and controlled remotely by the network. Every substation is controlled by a Supervisory Control and Data Acquisition (SCADA) system which communicates on DNP3 protocol on Internet/IP which has many security vulnerabilities. …
-
Intrusion Detection and Recovery of a Cyber-Power System
… post-attack with a focus on IEC 61850 based substations and recovery methodologies in the cyber-physical system framework. The first step of this study is to develop a novel Intrusion Detection System (IDS) specifically designed for deployment in automated substations. The proposed IDS …
-
Geomagnetically induced current sensitivity to assumed substation grounding resistances in the power system
… earth conditions than the construction of the substations themselves and 2) can vary by more than an order of magnitude, from 0.05 to 1.5 ohms. Substation grounding resistances are not contained in standard power system models, and approximate values are often used in GIC studies. This …
-
Low frequency transmission for remote power generating systems
… can be connected to the power grid at major substations via cyclo-converters that provide a low-cost interconnection and synchronization with the main grid. Cyclo-converter technology is utilized to minimize costs which result in systems of 20/16.66 Hz (for 60/50Hz systems respectively). Low …
-
Impact of Location and Size of Solar PV Plants for Integration in the Lusaka distribution grid network
… availability and location of 13 feasible 33kV substations i.e. Chibombo, Chisamba, Fig tree, Chongwe 88/33kV, Avondale, Chalala, Katuba, L85, Makeni, Chawama, Chilanga, Mapepe, Chalala and Katuba. Based on the scope, the following 6 substations Makeni, Avondale, Chelstone, Chilanga and Mapepe, …
-
Impact of Location and Size of Solar PV Plants for Integration in the Lusaka distribution grid network
… availability and location of 13 feasible 33kV substations i.e. Chibombo, Chisamba, Fig tree, Chongwe 88/33kV, Avondale, Chalala, Katuba, L85, Makeni, Chawama, Chilanga, Mapepe, Chalala and Katuba. Based on the scope, the following 6 substations Makeni, Avondale, Chelstone, Chilanga and Mapepe, …
-
The Average Potential Method of Calculating the Resistance of Power Substation Grounding Systems.
… for modeling the grounding systems of power substations in detail. Equations are derived for calculating the self resistance of each component of the grounding system and for calculating the mutual resistances between each component of the grounding system. Next, techniques are developed for …
-
Fast bus protection using iec 61850
… power utilities to build low cost digital substations. Because limited objective information is available, electric power utilities desire independent evaluations of IEC 61850 from end users. The objective of this study was to compare the IEC 61850 method to the hardwired method to find an …
Page 1 of 3