Browsing Graduate Theses and Dissertations by Author "Sachdev, M. S."
Now showing items 1-20 of 20
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ADAPTIVE GROUND FAULT PROTECTION FOR A DISTRBUTION NETWORK
Talukdar, Bani Kanta (1994-08)Due to advances in the field of digital protection, more and more utilities are using microprocessor based relays for protection of power system equipment However, the protection philosophy remains the same. The present ... -
COMPUTER MODELLING OF DIGITAL DISTANCE AND DIRECTIONAL RELAYS
Adu, Thompson (1989-02)With recent advances in microelectronics, the use of micro-processor based relays for power system protection has received much attention from power system researchers. To develop micro-processor relays suitable for use ... -
DESIGN AND IMPLEMENTATION OF A MICROPROCESSOR-BASED ADAPTIVE PROTECTION FOR A DISTRIBUTION NETWORK
Chattopadhyay, Bijoy (1993-06)The development of microprocessor-based relays started in early 1970's. Many researchers have had the view that long range economic trend favours the use of microprocessors in protective relays. As a result, for the last ... -
THE DESIGN AND IMPLEMENTATION OF A VERSATILE MICROPROCESSOR-BASED DIRECTIONAL OVERCURRENT RELAY
Guttormson, Wayne Allan (1993-06)Due to advancements in the field of electronics, relay designers are able to implement practical microprocessor-based relay designs which are being used more and more by utilities. With the increasing number of digital ... -
DESIGN AND SIMULATION OF SOFTWARE FOR A HIGH SPEED DIGITAL DISTANCE RELAY
Waikar, Deepak Laxmanrao (1989-03)Distance relays are used for the protection of transmission lines in electric power systems. These relays estimate an apparent impedance of the protected line from the relay location to the fault and compare it with the ... -
Design of a Distance Relay Using Adaptive Data Window Filters
Ghotra, Daljit Singh (2001)Transmission lines are generally protected by distance relays. Most distance protection relays presently available use microprocessor technology. They estimate fundamental frequency phasors from the quantized values of ... -
Digital computer solution of switching transients in transmission line models
Debnath, Kamal Krishna (1982)A transmission line may be subjected during switching to eletromagnetic stresses many times the normal levels. These excessive electromagnetic stresses damage power system equipment, transmission line hardware, transformers ... -
A DIGITAL TECHNIQUE FOR ESTIMATING THE FREQUENCY OF A POWER SYSTEM VOLTAGE
Shen, Jianping (1989-02)Power system measurements and protection are important elements of systems. Recent development of the microprocessor technology has resulted in the use of computer relaying in the power system. Considerable attention is ... -
A DIGITAL TRANSFORMER DIFFERENTIAL AND RESTRICTED EARTH FAULT RELAY
Shah, Dennis Vidyavilas (1981-08)Many kinds of relays are used to detect faults in power transformers. Two of these relays are the restricted earth fault and transformer differential relays. The concepts of harmonic restraint and variable percentage of ... -
ESTIMATING LOCATIONS OF SHUNT FAULTS ON DISTRIBUTION LINES
Das, Ratan (1994-11)The usual approach for estimating the locations of transmission line shunt faults has been to measure the apparent impedance to the fault from a line terminal and convert the reactive component of the impedance to the line ... -
ESTIMATING THE LOCATION OF A TRANSMISSION LINE SHUNT FAULT FROM DIGITAL IMPEDANCE RELAY MEASUREMENTS
Gill, Harpinder Singh (1989-02)Analog type distance relays used for transmission line protection identify the faulted zone but do not provide any information concerning the exact location of the fault. Fault locators, that estimate the distance to a ... -
AN INSTRUMENT FOR REAL-TIME MEASUREMENTS IN ELECTRIC POWER SYSTEMS
Srifastava, Anoop Kumar (1986-11)Conventional methods of measuring electrical parameters of a power system are based on electromechanical instruments. These electromechanical instruments suffer from inherent limitations common to all mechanical systems. ... -
INTERACTIVE SOFTWARE FOR EVALUATING RELAY ALGORITHMS
Nagpal, Mukesh (1986-10)Recent advances in microelectronics have made available low cost micro-processors with enhanced capabilities. This has increased the interest for using micro-processors in power system protection. Several relay algorithms ... -
PERFORMANCE ASSESSMENT OF DIGITAL DISTANCE RELAY ALGORITHMS
Modey, Bernard Tawia (1988-12)With recent advancements in micro-computer technology, the use of micro-processors for distance protection has received much attention from power system research groups. Different algorithms have been developed over the ... -
PHASE AND AMPLITUDE COMPARATORS FOR TRANSMISSION LINE PROTECTION
Uttamchandani, Ishwar (1993-11)There are four different types of faults which are usually experienced on a transmission line: phase-to-ground, phase-to-phase, double phase to ground and three phase faults. Therefore, it is essential to protect the ... -
PROTECTIVE RELAYING FOR PARALLEL-TEED TRANSMISSION LINES
Liu, Xianping (1994-08)Parallel-teed transmission lines (PTTLs) have economic and environmental advantages and have, therefore, been widely used in power systems all over the world However, protection of PTTLs has remained a difficult task. ... -
REAL-TIME POWER SWING DETECTION USING EQUAL AREA CRITERION
Cheng, Shengli (2006-04)Power systems are interconnected for enhancing the availability of power supply to the customers and for reducing the prices charged to them. A natural consequence of the interconnections is that the interconnected power ... -
RECURSIVE FILTERS AND POLYPHASE DISTANCE RELAYS
Nanuan, Kulwant Singh (1981-07)Distance relays, alone and in conjuction with communication channels, are used to protect modern EHV transmission lines. These relays check the electrical distance from a relay location to the fault and decide whether the ... -
RELlABILITY EVALUATION OF POWER SYSTEMS INCLUDING PROTECTION SYSTEM FAILURES
Tatla, Jagtar Singh (1982-04)Power transmission systems are becoming increasingly complex as the demand for electric energy increases. The protection system plays an important role in achieving high reliability by recognizing and isolating any abnormal ... -
STABILITY ANALYSIS OF A H.V.D.C. TRANSMISSION LINK
Chand, Jagdish (1971-08)This thesis presents a brief description of the steady state and dynamic operation of a high voltage d.c. transmission link. A block diagram model and the state space equations are developed from the small signal equations. ...