Protection of transmission system using global positioning system. When the interconnector between two stations has large reactance a the transfer of power will take place with voltage fluctuation and noise b the transfer of power will take place with least loss. Microprocessorbased protective relays applications in. Introduction transmission lines are a vital part of the electrical distribution system, as they provide the path to transfer power between generation and load. Selective, highspeed clearance of faults on high voltage transmission lines is critical to the security of the power system. Ppt an introduction to gis and gps technology powerpoint. Given a one line drawing identify the reverse power relay, frequency relay and differential relay used in generator protection. This is a new technique for the protection of transmission systems by using the global positioning system gps and fault generated transients. The most effective transmission line protection using todays technologies is.
Protection of lines or feeder august 31, 2018 february 24, 2012 by electrical4u as the length of electrical power transmission line is generally long enough and it runs through open atmosphere, the probability of occurring fault in electrical power transmission line is much higher than that of electrical power transformers and alternators. Model setting calculation document for transmission line. By knowing the line length l and the timeof arrival difference tb ta distance x can be calculated from the fl equation. The quarter wave line provides impedance transformation upto the highest frequency at which the transmission lines are used. Gps and gsm based transmission line monitoring system with fault detection. It typically takes longer to develop, permit and construct a transmission line than it does to develop a generation facility. Ppt introducing the l90 universal relay advanced transmission. One is concerned with an adaptive distance relaying algorithm adra designed for transmission line protection. This chapter presents two examples of the mmbased method used for protection of transmission lines. Then according to history and progress of the technology, transmission lines mostly use three phase alternating current ac. In adra, a morphological fault detector mfd designed based on mm is used to determine the occurrence of a fault. Know the possible transmission fluid leak spots in a car the transmission fluid is an important component for the shifting of gears as well as the steering wheel.
Line distance measurement methods and characteristics apparent impedance of fault loops and differences in phase and ground measurements the importance of faulted phase selection step distance line protection zone acceleration schemes nonpilot basics of communications assisted schemes optional time permitting. An alternative principle for line protection that is quickly becoming the norm is differential protection. Identify the relay protection scheme that senses power flowing into a generator from the power system. Transmission line protection system for increasing power. Relay contains a fault detection system together with a communication unit. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. The interrupting time of the circuit breakers of these various elements will also affect the secondzone time.
The apparent impedance so calculated is compared with the reach point impedance. In this scheme the relay contains a fault transient detection system together with a communication unit, which is connected to the power line through the high voltage coupling capacitors of the cvt. This paper presents a new fault location method for highspeed transmission line protection using wavelet technique. Alexander, schweitzer engineering laboratories, inc. Download fault location of overhead trasmision line seminar reports, ppt, pdf, fault location of overhead trasmision line seminar topics, abstracts, full documentation, source code. Reactive power compensation techniques in transmission. The complexity of protecting threeterminal transmission. Gps global positioning system and its application in protection. Line differential protection substation automation. The physical construction of the transmission line is also a factor in protection system application. Advantages protection of transmission line using gps. It is required to regularly check the transmission cooler lines, dipstick tube oring, transmission input and output shaft seal in order to avoid fluid leaks.
Pole dc differential protection shall have two levels of sensitivity settings, at the lower level. As the length of electrical transmission line is generally long enough and it runs through open atmosphere, the probability of occurring fault in electrical power transmission line. Protection of transmission lines distance protection by, rohini haridas assistant professor, dept of electrical engineering, ssgm college of engineering,shegaon 2. A computer and software to download and display event records obtained.
Main purpose of the transmission protection relay are to identify the fault of the location. Calculate the line inductancemeter and capacitance meter. Transmission lines operate at voltage levels from 69kv to 765kv, and are ideally tightly interconnected for reliable operation. Watch one of the weekly webinars showcasing easypower power analysis software. Protection of transmission lines using gps full report digital. Introduction a new technique for the protection of transmission systems. The transmission line is a twoport circuit used to connect a generator or transmitter signal to a receiving load over a distance. Assume the impedance of the line is 50 ohm, phase constant is 20 radm and the operating frequency is 700mhz. Overcurrent relays cannot provide fast, coordinated protection because. Hence all over voltage protection devices used in power system mainly due to lightning surges.
Switching impulse or switching surge when a no load transmission line is suddenly switched on, the voltage on the line becomes twice. Paper has made an attempt to obtain travelling waves components in the form of forward wave and backward waves from post fault components of voltage and. Protection of transmission line using gps authorstream. The proposed idea has the feature of unit protection. Electrical power transmission line protection systems. Threeterminal line protection table of contents conclusion and summary 1 introduction 2 1. If over voltage protection is not provided to the power system, there may be high chance of severe damage. Hon tat hui transmission lines basic theories nusece ee2011 1 transmission lines basic theories 1 introduction at high frequencies, the wavelength is much smaller than the circuit size, resulting in different phases at different. This webinar brought to you by the relion product family. Pdf the implementation of distance protection relay in. If the measured impedance is less than the reach point impedance, it is assumed that a fault exists on the line between the relay and the. This relays are also use to identify the type of the fault in transmission lines too.
Gandhi institute of industrial technology presented by sumit kumar padhy regdno1006027 logo btech seminar presentation traveling wave faul location theory traveling wave fault locators make use of the transien signals generated by the fault. If time to the relay is received from a gps antenna example. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Implement the distance protection setting on the transmission power system network in the digsilent powerfactory environment using sel 421relay model. It is required to regularly check the transmission cooler lines, dipstick tube oring, transmission input and output shaft seal in. The thirdzone unit provides backup p rotection for faults in adjoining line. Fault detection and autoline distribution system with gsm. Fault detection and auto line distribution system with gsm module is a automation technique used for fault. Transmission plans are often evaluated in forward looking ten year plans, and are refined as circumstances change. Distance protection setting using sel 421 relay model. Introducing the l90 universal relay advanced transmission line protection. The type of conductor, the size of conductor, and spacing of conductors determines the impedance of the line, and the physical response to short circuit conditions, as well as line charging current.
This paper representsthe technique for the protection of transmission systems by using the global positioning system. Transmission lines run over hundreds of kilometers to supply electrical power to the consumers. Protection of transmission lines using gps full report free download as word doc. Transmission line protection principles ge grid solutions. Construction of transmission and distribution lines. Positioning systemsgps and fault generated transients. Distance relays are designed to respond change in current, voltage, and the phase angle. In this research, protection of transmission lines using global positioning systems gps is presented. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Sendingend port a a b b transmission line generator. Gps was originally developed as a military force enhancement system and will continue to play this role.
Advantages protection of transmission line using gps is extremely accurate. Protection of transmission line using gps electric power. Provide civil gps services, free of direct user charges available on a continuous, worldwide basis maintain constellation consistent with published performance standards and interface specifications nonu. Assume we have a transmission line in which air separated the two perfect conductors. This protection shall coordinate with dc line protection 0 as a ground fault on the hvdc bus may also operate the dc line protection. M vijay kumar dept of eee, sree vidyanikethan engineering college tirupathi, india professor in dept of eee, jntua anantapur, ap india email. Relays are installed at each bus bar in a transmission network. Abstract this is a new technique for the protection of transmission systems by using global. The behavior of ground overcurrent protection on double circuit applications is also discussed in the paper. There are several relay system are use to protect transmission lines.
Differential protection is based on kirchhoffs laws, stating that all current into a network node shall add up to 0 in an ideal system. Principles and characteristics of distance protection. Often transmission lines are protected by using schemes. It is a required for industries to detect and locate the faults in the power system as early as possible. Protection of transmission lines using global positioning. Many special protection systems are available based on volume of power.
Identify the type of protection relay used in detecting a phasephase stator winding fault. Finally, some advanced features of communications assisted schemes, noncommunications protection schemes and fault location for double circuit lines. The basic principle of distance protection involves the division of the voltage at the relaying point by the measured current. This protection shall block before the dc line protection initiate a restart. Download fault location of overhead trasmision line. Transmission line protection based on travelling waves. Transmission line protections are much based on relays. Refer to the microstrip transmission line applet and design a 33 ohm microstrip. Ppt transmission lines powerpoint presentation free to. Transmission line protection using travelling waves generated at the time of fault are used as trip signals of a travelling wave relay. Pullman, wa, usa abstractthis paper describes a protective relay for fast and reliable transmission line protection that combines elements. There are several methods available for the protection of transmission and distribution lines 69.
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