Experimental studies on impedance based fault location for long transmission lines

Roostaee, Saeed; Thomas, Mini S.; Mehfuz, Shabana

doi:10.1186/s41601-017-0048-y

Cited by 43 publications

(32 citation statements)

References 15 publications

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“…The concrete values of these parameters are shown in Appendix A. 24 The length of the line is 5 km. The unbalanced 3-phase power flow calculation was calculated by the multiphase harmonic load flow program developed by the UA power lab for the analysis of power flow, which can be used for both the harmonic and unbalance study programs.…”

Section: Sensitivity Analysis Of the Proposed Methods With Respect Tmentioning

confidence: 99%

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Unbalanced source identification at the point of evaluation in the distribution power systems

Sun

Xie

2017

Int Trans Electr Energ Syst

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SummaryThree-phase unbalance is one of the most important power quality problems in the power system. When the system is working under unbalanced conditions, more losses and heating effects will be induced, and the system will become less stable, which is harmful to both utilities and customers. The most important thing for a seriously unbalanced system is to find out the main unbalanced source to take proper measures to mitigate the problem. In this paper, a method is proposed to indentify the main unbalanced source at the point of evaluation (POE) in the distribution power systems. Two extreme cases are analyzed in the paper by assuming that the unbalanced source to be totally from the POE upstream network or downstream network. Therefore, 2 corresponding analytical formulas are derived to reveal the relationship between the POE voltage unbalance factor (VUF) and the current unbalance factor (CUF). A method is then proposed to determine the contribution of the unbalanced source at the upstream and downstream networks based on the comparison between the derived VUFs and the actual VUF. Sensitivity analysis is implemented to show the robustness of the proposed method. The effectiveness and validity of the proposed method is illustrated by the IEEE 13-bus test system and IEEE 37-bus test system. It is shown that the estimation error of the proposed method is generally within 5%.

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Section: Sensitivity Analysis Of the Proposed Methods With Respect Tmentioning

confidence: 99%

“…All mutual impedances are equal, and they are expressed as Z SM . The relationship between the POE 3-phase voltage and current can be derived based on the upstream network parameters as shown in Equation 24.…”

Section: Case 2: the Unbalance Is Totally From The Downstreammentioning

confidence: 99%

Unbalanced source identification at the point of evaluation in the distribution power systems

Sun

Xie

2017

Int Trans Electr Energ Syst

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“…The equivalent impedance between terminals and fault types are required. Fault location algorithms that utilize two-terminal measurements are proposed in [10,11]. Fault location techniques that utilize traveling waves generated by faults are proposed in [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Wide area measurements based fault detection and location method for transmission lines

Fan

Liao

2019

Prot Control Mod Power Syst

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Electric power grids are critical infrastructure for delivering energy from generation stations to load centers. To maximize utilization of assets, it is desirable to increase the power transferred over transmission systems. Reliable protection of transmission systems is essential for safeguarding the integrity and reliability of the power grid. Distance protection is the most widely used scheme for protecting transmission lines. Most existing protection systems use local measurements to make a decision while pilot protection is used in some circumstances. Distance protection may fail under stressed operating conditions, which could lead to cascading faults. This paper proposes a system integrity protection scheme by utilizing wide area measurements. The scheme partitions the system into subnetworks or protection zones and employs current measurements to derive a fault identification vector indicating the faulted zone. Then the fault location is pinpointed based on wide area measurements and network data. The proposed method is able to deal with multiple, simultaneous faults, and is applicable to both transposed and untransposed lines. Evaluation studies based on simulation studies are presented.

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“…Currently travelling wave and impedance-based methods used for finding Open -circuit fault location. In Impedance bases method, phasor voltage and phasor current measured from either sides or single side of transmission line [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Location of Downed or Broken Power Line Fault Not Touching the Ground

Nuthalapati¹,

Sinha²

2019

EJEE

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Faults occurred in power system are common, all these faults are detected by protective devices but faults like Downed or Broken power line Fault not touching the ground, these faults not having enough faults current to operate fault detection devices in Over Head power distribution. Till now there is no protecting devices are identified this type of fault and location of this fault. As of now identifying by only by visual sighting. The proposed solution for finding Fault location Downed or Broken power line Fault not touching the ground.

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Experimental studies on impedance based fault location for long transmission lines

Cited by 43 publications

References 15 publications

Unbalanced source identification at the point of evaluation in the distribution power systems

Unbalanced source identification at the point of evaluation in the distribution power systems

Wide area measurements based fault detection and location method for transmission lines

Location of Downed or Broken Power Line Fault Not Touching the Ground

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