Estimating Zero-Sequence Line Impedance and Fault Resistance Using Relay Data

Das, Swagata; Ananthan, Sundaravaradan Navalpakkam; Santoso, Surya

doi:10.1109/tsg.2017.2774179

Cited by 12 publications

(16 citation statements)

References 11 publications

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“…The zero-sequence line impedance of Line 2 is estimated from terminal H measurements using any zero-sequence line impedance estimation algorithm for two-terminal line which uses measurements from one terminal only [5,11]. The algorithm to estimate the zero-sequence line impedance of a two-terminal line using data from only one terminal assumes that the fault resistance is zero and the fault location is known.…”

Section: Step 3: Estimate the Zero-sequence Impedance Of Linementioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

“…The second objective of this paper is to estimate the Thevenin impedance of the transmission network upstream from the monitoring location using the same set of fault waveform data. The authors had developed algorithms for estimating zero-sequence line impedance for two-terminal lines [5] but this paper explores algorithms for estimating zero-sequence impedance of threeterminal lines which has barely been studied previously. This paper serves as a further extension and as a sequel to the aforementioned paper.…”

Section: Introductionmentioning

confidence: 99%

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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

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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.

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Section: Step 3: Estimate the Zero-sequence Impedance Of Linementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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

Self Cite

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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%

“…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. Some authors have taken a more conservative approach and used 3 cycles after fault inception as the point for estimating phasors for this purpose [11,12]. A most likely scenario where this choice of time instant will fail is when the fault has been cleared very quickly and as a result, the fault segment is not long enough.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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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.

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An integrated backup protection and fault location module for unsynchronized three-terminal multisection hybrid transmission lines

Anand,

Kalita,

Parida

et al. 2024

Electric Power Systems Research

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Estimating Zero-Sequence Line Impedance and Fault Resistance Using Relay Data

Cited by 12 publications

References 11 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

An integrated backup protection and fault location module for unsynchronized three-terminal multisection hybrid transmission lines

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