An analogue multi-terminal line differential protection

Forford, T.; Messing, L.; Stranne, G.

doi:10.1049/cp:20040147

Cited by 3 publications

(4 citation statements)

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“…From inequality (8) we can know that if 0< 2 K <1, the performance characteristic of the second criterion is a circle. Its centre is ( ) 0 , 1…”

Section: ) the Performance Analysis Of The First Criterion In Complex...mentioning

confidence: 99%

“…In recent years, T-type transmission lines are widely used in extra-high voltage power system in China. Because load current may flow out in the case of internal fault and CT is apt to saturate in the case of external fault in T-type transmission line, the application of current differential protection becomes difficult [1][2][3][4][5][6][7][8]. Because the current differential protection based on fault current can avoid the influence of load current, a great many of criteria based on it have been proposed in T-type transmission line.…”

Section: Introductionmentioning

confidence: 99%

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Phase Related Current Differential Protection of Three-Terminal Transmission Lines

Luo

2012

AMR

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T-Type transmission lines are widely used in HV power system. The paper analyzes operation characteristics of fault component based traditional differential protection principles in the complex plane. The paper pointed out that there are some limitations for traditional principles in ensuring sensitivity of internal fault and reliability of external fault. Furthermore, the paper proposes a novel principle for T-type transmission line. Current phase differential phase is introduced into realization of current differential protection. Restraint unit of the proposed principle takes the role of drive and restraint respectively in the case of internal and external faults. Therefore, both the sensitivity and reliability of protection are improved significantly. At last, simulation tests show that the proposed principle is valid.

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“…From inequality (8) we can know that if 0< 2 K <1, the performance characteristic of the second criterion is a circle. Its centre is ( ) 0 , 1…”

Section: ) the Performance Analysis Of The First Criterion In Complex...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase Related Current Differential Protection of Three-Terminal Transmission Lines

Luo

2012

AMR

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“…Forford et al [7] have designed differential current algorithm for protection of MTLs. The proposed algorithm can differentiate internal fault, external fault and normal load conditions using electric mid-point (EMP).…”

Section: Introductionmentioning

confidence: 99%

“…In addition to voltage and current based methodologies [2][3][4][5][6][7][8][9][10], traveling wave-based protection schemes have been proposed for MTL protection [11,12]. Authors of [11] have used single traveling wave and fundamental measurements for fault location in MTLs.…”

Section: Introductionmentioning

confidence: 99%

PMU based adaptive zone settings of distance relays for protection of multi-terminal transmission lines

Mallikarjuna

Shanmukesh

Dwivedi

et al. 2018

Prot Control Mod Power Syst

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This paper proposes Phasor Measurement Unit (PMU) based adaptive zone settings of distance relays (PAZSD) methodology for protection of multi-terminal transmission lines (MTL). The PAZSD methodology employs current coefficients to adjust the zone settings of the relays during infeed situation. These coefficients are calculated in phasor data concentrator (PDC) at system protection center (SPC) using the current phasors obtained from PMUs. The functioning of the distance relays during infeed condition with and without the proposed methodology has been illustrated through a four-bus model implemented in PSCAD/EMTDC environment. Further, the performance of the proposed methodology has been validated in real-time, on a laboratory prototype of Extra High Voltage multi-terminal transmission lines (EHV MTL). The phasors are estimated in PMUs using NI cRIO-9063 chassis embedded with data acquisition sensors in conjunction with LabVIEW software. The simulation and hardware results prove the efficacy of the proposed methodology in enhancing the performance and reliability of conventional distance protection system in real-time EHV MTLs.

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Wavelet Transform Based Differential Protection Scheme for Tapped Transmission Line

Bhalja

Maheshwari

2006

2006 IEEE International Conference on Industrial Technology

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An application of wavelet transform based multi resolution analysis approach for double circuit transmission line protection from various faults is revealed in this paper, to intensify the result of various problems linked with distance security of double circuit transmission lines. The fault current signal is explored by choosing wavelet transform program of MATLAB and selecting 'db4' as mother wavelet to retrieve the fault current coefficients for fault detection in double circuit transmission line. Results of simulation work displays that the proposed relay based on wavelet transform can lift the work of orthodox protection schemes. Index Terms-Double circuit transmission lines, relaying schemes, wavelet transform, fault detection, location, and classification. I. PREFACE Multi terminal transmission lines are entirely standard owing to the growth of power transmission system both in convolution and expanse. Nevertheless, a double circuit transmission line constitutes unusual issues due to multi-terminals. On this subject, Adel Aktaibi et al. in [1] proposed a hybrid technique which consists of WPT and dq-axis components for current differential protection of transmission lines.. In their work, they developed and implemented hybrid technique by localizing frequency sub-bands of dq-axis components of the differential currents using WPT for finding out the best signature of the internal faults. P.D. Raval et al. in [2] proposed a method for series capacitor compensated multi bus EHV transmission system protection by using PNN. A classification of various types of transmission line faults has been done by the usage of PNN technique. Wavelet transform has been used for feature extraction of current signals. Y. Manju Sree et al. in [3] developed a protection scheme for multi-terminal transmission lines combined with wind energy source. Wavelet transform technique has been used for the analysis of different types of faults. In [4] Tamer S. Abdelgayed et al. developed a new technique based on harmony search algorithm (HSA) for determining suitable wavelet functions for the transmission line fault classification. Ahmad Abdullah in [5] developed a wavelet based neural network algorithm for classifying transients which include transmission line faults on protected and adjacent transmission line. In [6] Ahmad Abdullah proposed wavelet entropy based lightning fault detection on transmission lines. Ahmed R. Adly et al. in [7] proposed a fault identification algorithm for fault discrimination, classification and faulty phase selection of a high voltage transmission line. Ozkan Altay et al [8] developed and proposed a scheme that uses single end travelling wave fault location on transmission line by the usage of wavelet analysis without using the velocity of propagation. Saeed Asghari Govar and Heresh Seyedi in [9] proposed an adaptive CWT based differential protection of transmission line for cross country faults considering current transformer saturation. In [10] J. Uday Bhaskar et al. presented a wavelet and fuzzy based p...

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An analogue multi-terminal line differential protection

Cited by 3 publications

References 0 publications

Phase Related Current Differential Protection of Three-Terminal Transmission Lines

Phase Related Current Differential Protection of Three-Terminal Transmission Lines

PMU based adaptive zone settings of distance relays for protection of multi-terminal transmission lines

Wavelet Transform Based Differential Protection Scheme for Tapped Transmission Line

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