Validating transmission line impedances using known event data

Amberg, Ariana; Rangel, Alex; Smelich, G.

doi:10.1109/cpre.2012.6201238

Cited by 12 publications

(11 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Transmission line parameter estimation using different methods and a variety of data has been a topic of interest for researchers [4,5]. The zero-sequence impedance of an overhead line must be specified by protection engineers in relay settings and plays a key role in distance and directional protection [6,7], and fault location calculations. The zero-sequence impedance of a line depends on earth resistivity.…”

Section: Introductionmentioning

confidence: 99%

“…The zero-sequence impedance of a line depends on earth resistivity. A commonly used practice to determine the zero-sequence impedance is by using Carson's equation and using a typical value of 100 -m as earth resistivity [6,8]. As the earth resistivity depends on various factors such as soil type, temperature and moisture content in the soil [9] and is difficult to measure accurately, the zerosequence line impedance is subject to much uncertainty.…”

Section: Introductionmentioning

confidence: 99%

“…Several authors in the past have researched on validating zero-sequence line impedance but only for two-terminal lines [6,11]. Very little work, if any, has been conducted on validating the zero-sequence line impedance of threeterminal transmission lines.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Estimating zero-sequence impedance of three-terminal transmission line and Thevenin impedance using relay measurement data

Das¹,

Ananthan

Santoso

2018

Prot Control Mod Power Syst

View full text Add to dashboard Cite

Current and voltage waveforms recorded by intelligent electronic devices (IEDs) are more useful than just performing post-fault analysis. The objective of this paper is to present techniques to estimate the zero-sequence line impedance of all sections of a three-terminal line and the Thevenin equivalent impedance of the transmission network upstream from the monitoring location using protective relay data collected during short-circuit ground fault events. Protective relaying data from all three terminals may not be always available. Furthermore, the data from each terminal may be unsynchronized and collected at different sampling rates with dissimilar fault time instants. Hence, this paper presents approaches which use unsynchronized measurement data from all the terminals as well as data from only two terminals to estimate the zero-sequence line impedance of all the sections of a three-terminal line. An algorithm to calculate positive-, negative-and zero-sequence Thevenin impedance of the upstream transmission network has also been presented in this paper. The efficacy of the proposed algorithms are demonstrated using a test case. The magnitude error percentage in determining the zero-sequence impedance was less than 1% in the test case presented.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Estimating zero-sequence impedance of three-terminal transmission line and Thevenin impedance using relay measurement data

Das¹,

Ananthan

Santoso

2018

Prot Control Mod Power Syst

View full text Add to dashboard Cite

show abstract

“…Event reports have been traditionally used for performing fault analysis such as identifying the fault location [2][3][4][5] and fault resistance [6]. In recent times, they have been used for a variety of purposes such as evaluating relay and circuit breaker performance [7][8][9] and gleaning system parameters such as sequence impedance parameters of lines [10][11][12], estimating Thevenin impedance [13], verifying short circuit system model used for studies [14], and determining the exact fault inception and clearing times [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Authors in [21] have used 1.5 cycles after fault inception as their time instant for extracting phasors. The authors in [10] have identified other factors apart form CT saturation such as capacitive voltage transformer (CVT) transients which can last for about 1.5 cycles. Selecting phasors just 1.5 cycles after fault inception may be too quick as the transients may not have died out within this period in real-world cases.…”

Section: Introductionmentioning

confidence: 99%

An Automated Technique for Extracting Phasors from Protective Relay’s Event Reports

et al. 2018

View full text Add to dashboard Cite

Post-fault event report analysis is a crucial skill set for electric power engineers in the protection industry. This paper serves as a reference which elucidates the preprocessing procedures involved in transforming data present in event reports to phasors that can be used in various post-fault analysis application algorithms. The paper discusses key elements of this process such as interpreting the data and calculating voltage and current phasors from instantaneous sample values present in a fault record. A crucial component of event report analysis is choosing the appropriate time instant for calculating phasors for event report analysis. Conventionally, protection engineers manually perform event report analysis and arbitrarily select time instants after certain cycles of fault inception for this purpose. This approach prevents the process from being successfully automated. Furthermore, arbitrary selection of time instant does not utilize the entire fault data and may fail in several cases such as short time fault scenario and evolving fault scenario. For this purpose, this paper proposes an adaptive novel technique which utilizes the entire data present in the event report to select the most suitable time instant for event report analysis. The superiority of the proposed algorithm over conventional methods is demonstrated using three real-world scenarios.

show abstract

References

2021

Fault Location on Transmission and Distribution Lines

View full text Add to dashboard Cite

Validating transmission line impedances using known event data

Cited by 12 publications

References 4 publications

Estimating zero-sequence impedance of three-terminal transmission line and Thevenin impedance using relay measurement data

Estimating zero-sequence impedance of three-terminal transmission line and Thevenin impedance using relay measurement data

An Automated Technique for Extracting Phasors from Protective Relay’s Event Reports

References

Contact Info

Product

Resources

About