Localisation of fault using travelling wave theory based on. Testing and verification of the proposed measurement system through simulations. One of the software engineering interests is quality assurance activities such as testing, verification and validation, fault tolerance and fault prediction. Abstractfaults in power transmission lines cause transients that travel at a speed close to the speed of light and. Apr 14, 2015 according to a first aspect of the invention, a method of fault detection in a highvoltage power transmission line is provided. Cmc accessory for testing traveling wave protection relays and fault locators twx1 is the ideal fieldtesting solution to test all functions of traveling wave protection relays. Fault location method based on eemd and travelingwave. Furthermore, the sides of lightning and flashover are distinguished. An improved travelingwavebased fault location method with. As the increasing number of phasor measurement units pmus are deployed, wide area protection in power systems has been gaining interest. You will get precise results regardless of the line configuration or fault impedance. A complete traveling wave fault location system includes more than just the detection of the traveling wave itself.
The fault generated transient traveling waves are wide band signals which. The time tl2 tl1 is the travel time from l to the fault and back. Keywords transmission lines, fault location, traveling wave s, current transformers, signal processing, wavelet transform. Then, the corresponding wave speed of the traveling wave fault is changeable rather than a certain value. A supplemental algorithm consisting of a highset overcurrent relay as well as an impedancebased relay is also proposed. While, in the past, travelling wave fault locators measured transient. Fault location method based on eemd and travelingwave speed. In this paper, we present a scheme for fault area estimation using pmus and. A distribution network fault location method based on reverse.
Journal of electrical engineering, electronics, control and. Tfs2100e travelling wave fault locator system description. I wished to use simulink to simulate the fault detection on multi circuit lines. Based on the analysis of the transient process of the electric lines developing ground fault, this paper applies the oppositelydirected travelling wave fault location method to fault location in distribution network.
The authors present the results of investigations into a new fault location technique for overhead power distribution systems. A novel method to locate a fault of transmission lines by. Pdf traveling wave fault location in power transmission systems. A combined impedance and traveling wave based fault. Investigate the effect of different parameters on the accuracy of fault location. Travelingwave fault location is a method of estimating the location of a fault based on measuring the difference in arrival times of fault artifacts at the two ends of a faulted. The sel411l includes the fieldproven doubleended twfl, which uses a tw87 communications channel to exchange wave arrival times. Traveling wave fault location monitors qualitrol corp.
It is fully supported by the software relaysimtest and enables testing to be prepared and performed efficiently. Traveling wave fault location in protective relays. Voltage travelling wave based smart reclosure for cables and. Proposed work has made an attempt to find solution to the problem of fault detection and location by relay using post fault high frequency signals. At last, combing the travelling wave method and wavelet packet transform wpt, the arrival time of. To overcome the problem of precise fault detection, this paper proposes a zero fault detection and tw theory to determine the location of ground faults in a. Hence, methods using travelling waves sometimes used in high voltage hv systems have been investigated to determine whether they could be suitable to use for this purpose also. An improved travelingwavebased fault location method. Methods based on travelling waves theory utilize voltage andor current data. The article describes the travelling wave algorithm of detection, classification and fault location based on wavelet transform, which precisely locates faults in hv lines. The basic process of a traveling wave fault location system. Design, testing, and results stephen marx, bonneville power administration brian k. Computer, where twfl software resides in the system control center. Voltage travelling wave based cables and overhead mixed lines intelligent reclosing is proposed on the basis of travelling wave location in the paper and can be embedded in relay protection.
A fault occurring on a transmission line will generate both voltage and current travelling waves. Current wave form, lg fault at 50km the above current waveform represents an lg fault created at distance of 50km on a transmission line of 200km long, the fault creation time is 0. Travelling wave is an extremely precise fault location method for overhead. Pdf traveling wave fault location in power transmission. A direct pattern recognition of sensor readings that indicate a fault and an analysis of the discrepancy between the sensor readings.
The need to detect the fault location in the transmission line as quickly and. Forward traveling wave and backward traveling wave in the. Selective wavefront based protection algorithm for mtdc systems. Travelling wave based fault location techniques work well for line commutated converter lcc based high voltage direct current hvdc transmission lines, but the large capacitors at the dc line terminals makes application of the same techniques for voltage source converter vsc. Travellingwave based fault protection of highvoltage. Traveling wave fault location on interconnected overhead lines where high availability is important. One method of determining the fault location uses precise measures of the tw arrival times at both ends of the transmission line. The simulation results showed that the method is effective to find fault location. Selective wavefront based protection algorithm for mtdc. Research on power gird fault travelling wave detection device based on substation secondary signald. Travelingwave fault locators built into transmission line protective relays and using standard current transformers determine locations of faults to within a tower span while adding very little cost.
To estimate fault location, this singleend fault locating method uses the time difference between the first arrived tw and the successive reflection from the fault, as shown in 3. Travelling wave fault location in rural radial distribution. A new fault location method for distribution network based. Simultaneously, this paper chooses proper wavelet generating functions to find the modulus maximum of oppositelydirected travelling waves and summarizes the methods and steps. The conventional approaches to distribution network fault location has certain drawbacks in terms of complexity, especially the fault occurred in the branch lines. The practical aspect of adding this capability without multiplying entire measuring systems means it needs to be combined with existing devices. In particular, fault detection, fault classification and fault area estimation are essential to reduce the damage of faults, and even prevent catastrophic cascades of failures. To summarize the relevant literature, the calibration of the traveling wave head and the determination of the. Faults in power grid transmission lines often occur in remote locations, and repairing them can be time consuming, especially if the location of the fault is unknown. Thirdly, the lightning striking range in which interval of the line is determined by comparing the signals from all the detection points. Travelling wave fault location in hv lines krzysztof glik warsaw university of technology. This is done to overcome the wellknown shortcomings of travelingwavebased protection techniques for the detection of very closein faults and singlephasetoground faults occurring at small voltage magnitudes. Lattice diagram showing incident, reflected, and transmitted tws. Traveling wave fault location is a method of estimating the location of a fault based on measuring the difference in arrival times of fault artifacts at the two ends of a faulted.
Hu, the online measurement of the traveling wave velocity in fault. Travelling wave based dc line fault location in vsc hvdc. New possibilities for testing traveling wave fault. A survey on software fault detection based on different. At present, in the fault detection of the hvdc system, fixed wave speed is simply selected in fault location 8.
Tws propagate in both directions away from the fault. For process and equipment engineers, maximizing equipment effectiveness, reducing yield excursions, improving product cycle time and enhancing the overall output of. Precision is not affected by line and fault impedance, mutual. Recent techniques used in transmission line protection. A direct pattern recognition of sensor readings that indicate a fault and an analysis. Travelingwave fault location is a method of estimating the location of a fault based on measuring the difference in arrival times of fault artifacts at the two ends of. Traveling wave, fault location, protection relay, protection testing. For the love of physics walter lewin may 16, 2011 duration.
Traveling wave provide extremely precise fault location monitoring with leading accuracy and consistent results for all types of faults that allow maintenance crews to respond quickly. Accurate, consistent results for all types of faults quickly displayed in a control room or engineering center where it is needed to direct maintenance teams and reduce downtime. Traveling wave fault locators built into transmission line protective relays and using standard current transformers determine locations of faults to within a tower span while adding very little cost. The scheme is based on detecting fault induced highfrequency components on distribution lines. Travelingwave fault locating schweitzer engineering. Zwave software development kit sdk zwave sdk source code. P14nz nondirectional feeder management relay with high impedance fault detection 735 to 850 retrofit feeder protection system p154 nondirectional overcurrent relay and earth fault. Transients program atp using the models language and simulations were. Most faults generate a waveform containing a significant amount of highfrequency energy. When any company does not have sufficient budget and time for testing the entire application, a project manager can use some fault prediction algorithms to identify the parts of the system that are more defect prone. A travelling wave detection methods and finally the fault location algorithm will be described. Hu, the online measurement of the traveling wave velocity in fault location system ph. Travelingwave fault locators built into transmission line protective relays and using standard current transformers determine locations of faults to within a tower.
Fault detection and classification fdc transforms sensor data into summary statistics and models that can be analyzed against user defined limits to identify process excursions. Isbn printed 9789512292448 issn printed 17952239 isbn pdf 9789512292455 issn pdf 17954584 language english number of pages 108 p. Transmission line protection using travelling waves generated at the time of fault are used as trip signals of a travelling wave relay. Localization of faults on power transmission lines using. Voltage travelling wave based smart reclosure for cables. The requirement on the speed of the fault detection for the reconnected system is in the order of 1 ms. The amplitude of the fault induced travelling wave at the fault location is estimated. This method choose the measurement point which the initial traveling waves first reached as the reference measurement point, and the distance. Pdf detection, classification and fault location in hv. Travelling wave fault location for power system networks insulect. Fault area estimation using traveling wave for wide area. The diagnosis software of tdu100e can identify the failed hardware module and provides detailed diagnosis information, such as gps signal.
The method comprises estimating a voltage amplitude v f of a fault induced travelling wave, and calculating a fault resistance r f. Theoretical analysis and simulation results show that the scheme is feasible. This should enable the detection of discharges from the lowlevel breakdown of insulators, which cannot be detected by conventional methods. Traveling wave fault location in power transmission sys. When a fault occurs on a transmission line, it will affect the whole power system. A method for travelling wave protection of a transmission line, the method comprising. The highly reliable fault location system uses an innovative and patented combination of travelling wave and fault detection algorithms where all the triggers normally associated with digital fault recorders dfrs can also be used to record tw events.
To summarize the relevant literature, the calibration of the traveling wave head and the determination of. In the 70s research was concentrated on ultra high speed protection based on the travelling wave. The post fault wave forms in the first one or two cycles after the occurrence of a fault contain high frequency transient wave fronts. Single ended traveling wave based fault location using discrete wavelet transform in power transmission systems, locating faults is an essential technology. Sel411l advanced line differential protection, automation, and control system combine subcycle line protection with travelingwave fault locating subcycle differential and distance protection minimizes damage and expensive repairs on transmission lines. Whole process of obtaining fault location takes 5 10 minutes. Since the voltage and current waves in each direction are accompanied by each other, the application of the fault simultaneously initiate a current wave. Traveling wave extraction due to the complexity of cables and overhead mixed lines structure, dispersion phenomenon of travelling wave generated in fault point is seriously when its transmits to both ends.
The completed software is insensitive to different transmission line characteristics. Travelling wave based dc line fault location in vsc hvdc systems. Fault location in protective relays has been available for over 20 years. Optional travelling wave fault locator for extremely precise fault location features phasor measurement unit according to c37.
Zeng, research on the new principle of fault detection and location of power line and the realization of information fusion ph. Simulation model is developed in emtprv software to illustrate the performance of proposed algorithm based on real network data. Localisation of fault using travelling wave theory based. Isa has accomplished this by introducing the travelling wave fault locator system tfs2100. Travelingwave fault locating is the best method for seriescompensated and parallel transmission line configurations. A travelingwavebased protection technique using wavelet. These will travel along the line until they meet a discontinuity on the line such as fault point and bus bar. Travelling wave protection of a transmission line based on.
Transmission line fault location using traveling wave. Forward traveling wave and backward traveling wave in the extraction of fault 5. A combined impedance and traveling wave based fault location. The paper describes a novel traveling wave based accurate fault location scheme to overcome the. Fault detection, isolation, and recovery fdir is a subfield of control engineering which concerns itself with monitoring a system, identifying when a fault has occurred, and pinpointing the type of fault and its location. A new travellingwave based scheme for fault detection on. In this paper, we present a scheme for fault area estimation using pmus and traveling wave theory. A distribution network fault location method based on. Travelingwavebased accurate fault location method adaptive.
Travelingwave fault locating schweitzer engineering laboratories. Transmission line protection based on travelling waves. I am currently doing a project about fault location detection on transmission line by using travelling wave method. Fault location on transmission lines based on travelling waves. In this paper, a novel fault location method based on dtype traveling wave was proposed.
For process and equipment engineers, maximizing equipment effectiveness, reducing yield excursions, improving product cycle time and enhancing the overall output of the factory are key success. Travelling wave tw based fault location is considered as a very accurate model, however, it needs high sampling frequency to detect faults. Nov 30, 20 one of the software engineering interests is quality assurance activities such as testing, verification and validation, fault tolerance and fault prediction. Traveling wave fault location is a method of estimating the location of a fault based on measuring the difference in arrival times of fault artifacts at the two ends of a faulted line. A new fault location method for distribution network based on. In the doubleended traveling wave based method, the distance between a fault point and measuring point at and terminals can be obtained according to where and are the distance away from the measuring points at and terminals to the fault point, respectively. The travelingwave frequencies and the elm were used to find fault location. To find the fault location accurately and promptly is required to ensure the power supply. A new approach was conducted for determining the fault location in transmission lines. The travelling wave fault locators twfl currently available on the market rely on. In the year of 1995, the first tfs2100 systems were installed, and in 2000, the second generation was successfully developed. Jul 18, 2016 in particular, fault detection, fault classification and fault area estimation are essential to reduce the damage of faults, and even prevent catastrophic cascades of failures.
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