High impedance faults involve arcing which makes fault current asymmetric. Detection of highimpedance faults in transmission lines. A voltagebased approach for series high impedance fault. The high impedance detection technology has been incorporated into a complete relay system with conventional overcurrent protection, reclosing and metering functions. In this study, a simple two criteriabased protection scheme is proposed for detection and isolation of hifs in multi. Expert system for detecting high impedance faults justia. The truth about arc detection evaluation engineering. Arc detection, high impedance fault, incipient fault, arcing algorithm. Enhance high impedance fault hif detection security using selpatented technology. Control strategies for high impedance fault detection users of the dfm expect its high impedance fault detection to. High impedance fault detector technisearch limited. And high impedance arcing fault in overhead line, its fault is only tens ampere which is not large enough to trigger the conventional overcurrent relays10. An apparatus, system, and method for detecting high impedance faults in electrical power lines using a composite high impedance fault detection system having a voter logic that samples the logical outputs from a plurality of independent high impedance detection systems and determines a high impedance fault if any two of the plurality of independent high impedance detection systems indicates. Voltage regulator, highimpedance, high potential, over current relays, power quality, fault detection, voltages measured.
High impedance faults hifs in electrical distribution systems generally present serious public safety hazards, utility liability problems and equipment damage due to a risk of arcing ignition of fires. Sensitivity and robustness to detect and isolate faults can influence the safety and reliability of such systems. For high current arcing fault detection, the arcing fault is. This paper describes a new faultdetection technique which involves capturing the current signals generated in a transmission line under hifs. However, it is extremely difficult to detect hifs in electrical distribution systems by conventional overcurrent relays or fuses because they do not generate enough fault current to be.
Introduction detection of downed power lines is a longstanding problem to electric utilities. At the power systems and high voltage laboratory, helsinki university of technology tkk, finland, experiments have been performed to measure the fault characteristics due to leaning trees and therefore to verify. High impedance faults result in very low currents which are often not detectable by conventional overcurrnet relays. An apparatus, system, and method for detecting high impedance faults in electrical power lines using a composite high impedance fault detection system having a voter logic that samples the logical outputs from a plurality of independent high impedance detection systems and determines a high impedance fault if any two of the plurality of independent high impedance detection systems indicates a. Third iasted asian conference power and energy systems, thailand.
Hiz often would cause arcing causing fires thus could be. Pdf high impedance fault modelling and application of. Cad pscad software is used to attain the faulted signals. Salehhigh impedance fault detection in mutually coupled doubleended transmission lines using high frequency disturbances power system conference, 2008. Highimpedance faults hifs in electrical power distribution systems produce a very random, nonlinear and lowmagnitude fault current.
Phase identification phase a, phase b, or phase c is determined when either the arcing or downed conductor output occurs. Discriminates high impedance faults from normal transient operations. Arcing fault af is usually associated with an undowned or downed conductor. The individual high impedance fault detection techniques have different algorithms for detecting high impedance faults. High impedance faults involve arcing which makes fault current.
High impedance fault detection methodology using wavelet. High impedance arc fault detection in a manhole environment. The 10052 resistor is used to simulate a highimpedance arcing fault and the arcing fault mechanism was simply a mechanical vise with isolated handles and arcing contacts. A new hif detection approach based on correlation functions is applied on the voltage and current signals in this paper. Improve understanding of hif events with dedicated high impedance event reports for detailed analysis. Abstract this paper describes detection of highimpedance arcing faults hifs in transmission lines using the wavelet transform and fuzzy logic. Based upon an experts knowledge of high impedance fault behavior and the performance of various fault detection techniques, the expert forms a belief as to whether a high impedance fault has indeed occurred. High impedance fault, fault detection techniques, modeling, fault location. A feature selection method for high impedance fault detection. Active, expires 20240512 application number us10770,270. A novel high impedance fault detection technique in.
Lan within the substation tying various devices on different software platforms to a. Flexible io options, easy mounting, and fast settings make the sel751 the right solution for industrial and utility feeder protection. Its main thrust lies in the utilisation of the absolute sum value of signal components based on the discrete wavelet transform dwt. Introduction highimpedance faults hifs on distribution feeders are abnormal electrical conditions that cannot be detected by conventional protection schemes. Keywords power distribution, distribution networks, earth faults, detection, positioning, fault resistance, arching, neutral voltage, residual current, transients abstract the subject of this thesis is the single phase earth fault in medium voltage distribution networks that. Opencircuit fault detection in distribution overhead. High impedance faults hifs are difficult to detect due to the low magnitudes of. A short time delay in the detection scheme can also be tolerated by power systems because of the low magnitudes of arcing high impedance fault currents.
Introduction this is a status report to the line protection subcommittee of the psrc on the applications of high impedance fault detection technology. Energized primary conductor contacts quasiinsulating object, eg. The device incorporates nine sophisticated high impedance algorithms with an expert arc detector ead. Citeseerx document details isaac councill, lee giles, pradeep teregowda. A sophisticated decision logic is also designed for the determination of a trip decision. The high impedance fault detection system, hif detecttm, is based on some of the techniques discussed in references 47. High impedance fault detection of distribution network by.
This type of faults is difficult to detect by over current protection relays because of low fault current. Taalab, modeling and experimental verification of high impedance arcing fault in medium voltage networks, ieee transactions on dielectrics and electrical insulation, vol. A microprocessorbased digital feeder monitor with high. In this paper, a high impedance arcing fault of the tree leaning type in medium voltage mv networks is modeled and experimentally verified. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.
Any fault may change into another fault type through physical instability or through the effects of arcing, wire burndown, electromagnetic forces, etc. Pscademtdc software is used for generating data for. The phasors are measured by pmu to obtain the square summation of errors. An arc fault is defined as a high impedance discharge of electricity through the air that creates light and heat 4. It occurs when two corroded or loose wires make intermittent connections thus causing sparking arcing between connections. The key to efficient implementation is to recognize the common elements of the fault analysis tasks, and then make best use of the available sensing elements and data produced by. High impedance fault hif has been a challenging task to detect in. The conventional overcurrent oc relayingbased distribution system protection schemes find difficulty in detecting such lowcurrent hifs. Arcing fault detection with experimental verification.
High impedance faults hifs have been a major concern for protecting distribution systems and public safety hazards when involving downed conductors. Modelbased general arcing fault detection in medium. A novel high impedance fault detection technique in distribution systems with distributed generators. High impedance fault detection and isolation in power distribution. Abstract this paper represents a high impedance fault. High impedance fault detection on power distribution feeder. Wester member, ieee ge power management 20 technology parkway, suite 330 norcross, ga 30092 usa abstract the detection of high impedance faults on electrical distribution systems has been one of the most persistent and difficult problems facing the electric utility industry. Arc sense tm technology ast high impedance fault detection securely detect and clear more high impedance faults. Arcing fault detection with interpretable prediction model. Detection of high impedance arcing faults in transmission.
High impedance arc fault detection in a manhole environment by thomas arthur cooke the scope of this thesis was to develop a prototype highimpedance arc detection system that a utility worker could use as an early warning system while working in a manhole environment. The deployment of smarter grids brings new technologies for smart monitoring, automation, and protection of distribution networks. Modeling and detection of high impedance arcing fault in medium voltage networks. Downed power line, arcing high impedance fault, transient analysis, harmonics, real coded genetic algorithm. Experimental study and fault recognition xiu yao, luis herrera, yi huang, and jin wang department of electrical and computer engineering the ohio state university columbus, the united states yao. Study of high impedance fault detection in levante area in spain, proceedings of ninth international conference on harmonics and quality of power, vol. Recently, the wavelet transform wt has been successfully applied in many fields. Modeling and detection of high impedance arcing fault in. The sel751 feeder protection relay is ideal for directional overcurrent, fault location, arcflash detection, and highimpedance fault detection applications. Enhance highimpedance fault hif detection security using. Hybrid algorithm for detection of high impedance arcing fault in overhead transmission system abdulhamid. This paper presents a new method for a series of hif detection and location in primary distribution feeders, using. A novel high impedance arcing fault detection based on the. Detection of highimpedance faults in power distribution systems.
High impedance fault detection in power distribution. This paper presents a new method for detecting high. With modern signal processing techniques, special hardware and software can be used to significantly improve the reliability of detection of certain types of faults. Research highlights new high impedance fault detection methodology in distribution networks. Algeelani faculty of electrical engineering, universiti teknologi malaysia, 810 skudai, johor, malaysia.
The sel751 feeder protection relay is ideal for directional overcurrent, fault location, arc flash detection, and high impedance fault detection applications. This paper proposes a new algorithm for high impedance fault hif detection using phasor measurement unit pmu. A new approach to high impedance fault detection based on. Active high impedance faults are usually pursued by arc and draw currents less than the. High impedance fault detection technology working group ieee. Single phase earth faults in high impedance grounded networks. In the past decades, there are several methods have been proposed for the two types arcing fault detection separately. Field tests on distribution systems in north america with a typical voltage of 12. An approach to detection of high impedance fault using. High impedance fault hif detection is configured to detect low fault currents and arcing currents on power distribution lines. This, in turn, enhances accuracy and reliability in fault detection and the features can be applied to affecting faultlocation techniques 14. Wavelet transform in the accurate detection of high.
Discrete wavelet transform integrated with a fuzzy logic system is designed for fault detection of a. However, when a downed conductor comes into contact with highly resistive objects, such as asphalt, sand or rocks, fault impedance can. The undowned conductor scenario involves the contacts between overhead lines and tree limbs that have large impedance. The calculation of the current variation thus leads to the determination of intensity and spectral content of the radiated electric field. Pdf the aim of this paper is to develop a softwareoriented framework that. Such faults are called evolving faults and the detection of evolution processes and fault type stages are of interest to utility engineers. Based on a combined use of wavelet transform and artificial neural networks.
Finally, the fault can be detected by the ground fault detection relays if the arcing current is. Pdf high impedance fault modelling and application of detection. Development of fault detection algorithm for high impedance faults in distribution network using multiresolution analysis. Izzularab a novel selectivity technique for high impedance arcing fault detection in. Twelve indices based on correlation functions are implemented and tried on a lot of cases. This paper does not address the detection of those abnormal conditions where a conductor breaks and does not contact either another conductor or a grounded element. In this paper, an index based on phasors change is proposed for hif detection. Hybrid algorithm for detection of high impedance arcing. Arc fault pressure detector in low voltage switchboard.
Similarly, if a downed conductor falls on a poorly conductive surface such as sand, asphalt, grass, soil, and concrete, the fault. A high impedance fault hif does not have to involve a path to. Download citation arcing high impedance fault detection using real coded genetic algorithm safety and reliability are two of the most important aspects of electric power supply systems. Power line, arcing high impedance fault, transient analysis, harmonics, over current devices, detection of high, i. Highimpedance fault detection securely detect and clear more highimpedance faults. The arcing contacts used for this experiment were carbon welding electrodes and the cable lengths and gauges used are shown in table 1. Arcing faults cause low level current, which does not ordinarily affect power system stability. High impedance fault detection on distribution systems.
Sel751 feeder protection relay schweitzer engineering. This paper describes a new fault detection technique which involves capturing the current signals generated in a transmission line under high impedance faults hifs. The individual high impedance fault detection algorithms can each have a different confidence level. Detection of high impedance fault hif that is mainly occurred in mv power systems has been a challenge due to its low current magnitude.632 155 1055 1665 213 492 1620 932 933 1478 970 208 1204 1288 1211 40 1262 1074 412 1075 1073 502 577 530 508 1527 828 650 1338 45 172 892 1163 257 1184 967 392 1133 502 587