Detection of highimpedance faults in power distribution systems. Sensitivity and robustness to detect and isolate faults can influence the safety and reliability of such systems. High impedance fault detection methodology using wavelet. An expert detection system includes a method and apparatus for detecting high impedance faults occurring on a distribution circuit coupled to an ac power source. High impedance faults result in very low currents which are often not detectable by conventional overcurrnet relays. This paper proposes a new algorithm for high impedance fault hif detection using phasor measurement unit pmu. Any fault may change into another fault type through physical instability or through the effects of arcing, wire burndown, electromagnetic forces, etc. Phase identification phase a, phase b, or phase c is determined when either the arcing or downed conductor output occurs. Safety and reliability are two of the most important aspects of electric power supply systems. High impedance arc fault detection in a manhole environment. Salehhigh impedance fault detection in mutually coupled doubleended transmission lines using high frequency disturbances power system conference, 2008. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Charles kim, arcing fault detection with experimental verifica tion using antenna for signal capture of radiated electromagnetic energy voltage 10. 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.
The undowned conductor scenario involves the contacts between overhead lines and tree limbs that have large impedance. 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. Recently, the wavelet transform wt has been successfully applied in many fields. High impedance fault detection only requires inputs from the three. For high current arcing fault detection, the arcing fault is. However, when a downed conductor comes into contact with highly resistive objects, such as asphalt, sand or rocks, fault impedance can. In the past decades, there are several methods have been proposed for the two types arcing fault detection separately. A high impedance fault hif does not have to involve a path to. High impedance faults hifs have been a major concern for protecting distribution systems and public safety hazards when involving downed conductors. Such faults are called evolving faults and the detection of evolution processes and fault type stages are of interest to utility engineers.
Active, expires 20240512 application number us10770,270. Abstract this paper represents a high impedance fault. Hiz often would cause arcing causing fires thus could be. The high impedance detection technology has been incorporated into a complete relay system with conventional overcurrent protection, reclosing and metering functions.
Detection of high impedance arcing faults in transmission. Single phase earth faults in high impedance grounded networks. Lan within the substation tying various devices on different software platforms to a. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Arcing fault af is usually associated with an undowned or downed conductor. The truth about arc detection evaluation engineering.
Development of fault detection algorithm for high impedance faults in distribution network using multiresolution analysis. Pdf high impedance fault modelling and application of. Modeling and detection of high impedance arcing fault in. 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. A feature selection method for high impedance fault detection. Arc detection, high impedance fault, incipient fault, arcing algorithm. This arc modeling procedure is used as a useful guide to present a new model for high impedance arcing faults due to leaning trees.
Enhance highimpedance fault hif detection security using. 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. Introduction this is a status report to the line protection subcommittee of the psrc on the applications of high impedance fault detection technology. The individual high impedance fault detection techniques have different algorithms for detecting high impedance faults. Cad pscad software is used to attain the faulted signals. This paper presents a new method for a series of hif detection and location in primary distribution feeders, using. Based on a combined use of wavelet transform and artificial neural networks. Introduction detection of downed power lines is a longstanding problem to electric utilities. High impedance fault detection in power distribution. 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.
A new approach to high impedance fault detection based on. It occurs when two corroded or loose wires make intermittent connections thus causing sparking arcing between connections. 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. A new hif detection approach based on correlation functions is applied on the voltage and current signals in this paper. Its main thrust lies in the utilisation of the absolute sum value of signal components based on the discrete wavelet transform dwt. Twelve indices based on correlation functions are implemented and tried on a lot of cases.
Arc fault pressure detector in low voltage switchboard. Detection of highimpedance faults in transmission lines. This paper describes a new fault detection technique which involves capturing the current signals generated in a transmission line under high impedance faults hifs. In this paper, a high impedance arcing fault of the tree leaning type in medium voltage mv networks is modeled and experimentally verified. Voltage regulator, highimpedance, high potential, over current relays, power quality, fault detection, voltages measured. The arcing contacts used for this experiment were carbon welding electrodes and the cable lengths and gauges used are shown in table 1. In this paper, an index based on phasors change is proposed for hif detection. Arc sense tm technology ast high impedance fault detection securely detect and clear more high impedance faults. Hybrid algorithm for detection of high impedance arcing. Energized primary conductor contacts quasiinsulating object, eg. Detection of high impedance fault hif that is mainly occurred in mv power systems has been a challenge due to its low current magnitude. Improve understanding of hif events with dedicated high impedance event reports for detailed analysis. Highimpedance faults hifs in electrical power distribution systems produce a very random, nonlinear and lowmagnitude fault current.
With modern signal processing techniques, special hardware and software can be used to significantly improve the reliability of detection of certain types of faults. Discriminates high impedance faults from normal transient operations. This type of faults is difficult to detect by over current protection relays because of low fault current. Introduction highimpedance faults hifs on distribution feeders are abnormal electrical conditions that cannot be detected by conventional protection schemes. A voltagebased approach for series high impedance fault. A novel high impedance arcing fault detection based on the. Discrete wavelet transform integrated with a fuzzy logic system is designed for fault detection of a. 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. Finally, the fault can be detected by the ground fault detection relays if the arcing current is.
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. Study of high impedance fault detection in levante area in spain, proceedings of ninth international conference on harmonics and quality of power, vol. High impedance faults involve arcing which makes fault current asymmetric. An arc fault is defined as a high impedance discharge of electricity through the air that creates light and heat 4. The device incorporates nine sophisticated high impedance algorithms with an expert arc detector ead. The deployment of smarter grids brings new technologies for smart monitoring, automation, and protection of distribution networks. High impedance fault detection on distribution systems. The conventional overcurrent oc relayingbased distribution system protection schemes find difficulty in detecting such lowcurrent hifs. The sel751 feeder protection relay is ideal for directional overcurrent, fault location, arc flash detection, and high impedance fault detection applications.
The sel751 feeder protection relay is ideal for directional overcurrent, fault location, arcflash detection, and highimpedance fault detection applications. 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. High impedance fault hif has been a challenging task to detect in. High impedance fault detection and isolation in power distribution. Enhance high impedance fault hif detection security using selpatented technology. Pdf the aim of this paper is to develop a softwareoriented framework that. Arcing faults cause low level current, which does not ordinarily affect power system stability. Highimpedance fault detection securely detect and clear more highimpedance faults. High impedance fault detector technisearch limited. Flexible io options, easy mounting, and fast settings make the sel751 the right solution for industrial and utility feeder protection. Active high impedance faults are usually pursued by arc and draw currents less than the. 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.
High impedance fault hif detection is configured to detect low fault currents and arcing currents on power distribution lines. A sophisticated decision logic is also designed for the determination of a trip decision. Field tests on distribution systems in north america with a typical voltage of 12. Downed power line, arcing high impedance fault, transient analysis, harmonics, real coded genetic algorithm. A microprocessorbased digital feeder monitor with high. This paper presents a new method for detecting high. Similarly, if a downed conductor falls on a poorly conductive surface such as sand, asphalt, grass, soil, and concrete, the fault. Wavelet transform in the accurate detection of high. A novel high impedance fault detection technique in. Algeelani faculty of electrical engineering, universiti teknologi malaysia, 810 skudai, johor, malaysia. The calculation of the current variation thus leads to the determination of intensity and spectral content of the radiated electric field.
Control strategies for high impedance fault detection users of the dfm expect its high impedance fault detection to. Third iasted asian conference power and energy systems, thailand. 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. This paper describes a new faultdetection technique which involves capturing the current signals generated in a transmission line under hifs. Arcing fault detection with experimental verification. 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. Higher distribution voltage tends to increase the fault current and. High impedance fault detection of distribution network by. Sel751 feeder protection relay schweitzer engineering. High impedance faults involve arcing which makes fault current. Izzularab a novel selectivity technique for high impedance arcing fault detection in.
Modeling and detection of high impedance arcing fault in medium voltage networks. High impedance fault detection on power distribution feeder. High impedance fault, fault detection techniques, modeling, fault location. Research highlights new high impedance fault detection methodology in distribution networks. The phasors are measured by pmu to obtain the square summation of errors. Modelbased general arcing fault detection in medium. High impedance fault detection on distribution systems craig g. 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. Hybrid algorithm for detection of high impedance arcing fault in overhead transmission system abdulhamid. 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 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.
Arcing fault detection with interpretable prediction model. Taalab, modeling and experimental verification of high impedance arcing fault in medium voltage networks, ieee transactions on dielectrics and electrical insulation, vol. High impedance faults hifs are difficult to detect due to the low magnitudes of. Power line, arcing high impedance fault, transient analysis, harmonics, over current devices, detection of high, i. An approach to detection of high impedance fault using. Pdf high impedance fault modelling and application of detection. This, in turn, enhances accuracy and reliability in fault detection and the features can be applied to affecting faultlocation techniques 14. 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.
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. The individual high impedance fault detection algorithms can each have a different confidence level. Arcing high impedance fault detection using real coded. High impedance fault detection technology working group ieee. Abstract this paper describes detection of highimpedance arcing faults hifs in transmission lines using the wavelet transform and fuzzy logic. Opencircuit fault detection in distribution overhead. Overcurrent relays are generally used to protect the high voltage feeders in distribution systems. Pscademtdc software is used for generating data for. The high impedance fault detection system, hif detecttm, is based on some of the techniques discussed in references 47. A novel high impedance fault detection technique in distribution systems with distributed generators.