Investigation of Power Differential Concept for Line Protection

Darwish, H.A.; Taalab, A.-M.I.; Ahmed, Eman S.

doi:10.1109/tpwrd.2004.838516

Cited by 44 publications

(24 citation statements)

References 8 publications

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“…Furthermore, the fault current contribution of wind turbines with crowbar protected DFIG affects the performance of existing current differential and pilot protection schemes as reported in [6] and [7]. 2) Other types of differential protection schemes available in literature are the power differential protection schemes [18], [19]. In case of wind farm, the wind speed variation results in real power (P) output fluctuation throughout a day [5].…”

Section: Drawbacks Of Conventional Differentialmentioning

confidence: 99%

Data-Mining-Based Intelligent Differential Relaying for Transmission Lines Including UPFC and Wind Farms

Jena

Samantaray

2016

IEEE Trans. Neural Netw. Learning Syst.

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This paper presents a data-mining-based intelligent differential relaying scheme for transmission lines, including flexible ac transmission system device, such as unified power flow controller (UPFC) and wind farms. Initially, the current and voltage signals are processed through extended Kalman filter phasor measurement unit for phasor estimation, and 21 potential features are computed at both ends of the line. Once the features are extracted at both ends, the corresponding differential features are derived. These differential features are fed to a data-mining model known as decision tree (DT) to provide the final relaying decision. The proposed technique has been extensively tested for single-circuit transmission line, including UPFC and wind farms with in-feed, double-circuit line with UPFC on one line and wind farm as one of the substations with wide variations in operating parameters. The test results obtained from simulation as well as in real-time digital simulator testing indicate that the DT-based intelligent differential relaying scheme is highly reliable and accurate with a response time of 2.25 cycles from the fault inception.

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Section: Drawbacks Of Conventional Differentialmentioning

confidence: 99%

Data-Mining-Based Intelligent Differential Relaying for Transmission Lines Including UPFC and Wind Farms

Jena

Samantaray

2016

IEEE Trans. Neural Netw. Learning Syst.

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“…IFERRENTIAL protection is widely used as the main protection for transmission lines due to its inherent simplicity, excellent selectivity and immunity to power swings [1], [2]. However, with the rise of voltage level and the increase of transmission distance, especially the rapid development of extra/ultra-high-voltage (EHV/UHV) transmission lines, differential protection has encountered some difficulties, such as the impact of large distributed capacitance current and current transformer (CT) saturation.…”

Section: Introductionmentioning

confidence: 99%

A New Differential Protection of Transmission Line Based on Equivalent Travelling Wave

Tang

Xiang

Luo

et al. 2017

IEEE Trans. Power Delivery

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Differential protection is widely used for transmission lines, but its performance is affected by distributed capacitance current and current transformer (CT) saturation. Travelling wave (TW) differential protection is immune to these factors and can achieve ultra-high-speed operation. These characteristics are essential for long-distance extra/ultra-high-voltage (EHV/UHV) transmission line protection. However, the contradiction between sampling frequency and communication traffic makes it hard to ensure high sensitivity and high reliability at the same time. To solve this problem, a new TW differential protection based on equivalent travelling wave (ETW) is proposed in this paper. Wavelet transform is adopted to extract wavelet transform modulus maxima (WTMM) of TW, which are used to reconstruct ETW. Only several WTMMs need to be exchanged with the opposite terminal, so the amount of communication is largely reduced. Current energy ratio is defined and used for operation criterion to enhance the sensitivity during faults with large fault resistance and small fault inception angle. Detailed discussions on the selection of setting value ensure the reliability of the proposed protection scheme. Extensive simulations are conducted to test the performance of the protection. Simulation results verify that the protection can correctly discriminate between internal and external faults with high sensitivity and reliability.

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“…Sensitivity, selectivity and reliability of the conventional current differential protection are affected and limited by the presence of distributed capacitances along transmission lines, especially in high-voltage long transmission lines [5,6]. These problems are resolved by a newer version of differential protection based on the active and reactive powers measured at the both line ends [7][8][9][10][11]. Power differential protection is a pilot protection scheme introduced to prevent the disadvantages of current differential protection in the presence of capacitive charging current.…”

Section: Introductionmentioning

confidence: 99%

Protection of transmission lines using fault component integrated power

Bolandi

Seyedi

Hashemi

2014

IET Generation, Transmission & Distribution

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In this study, a novel scheme is proposed for pilot protection of transmission line based on the fault component integrated power (FCIP). An appropriate definition is proposed for FCIP. The proposed scheme is able to quickly discriminate the normal condition, internal fault and external fault situations, even in severe operating and emergency conditions. This FCIP-based scheme is not affected by the line charging capacitive and, therefore it does not need to be compensated for the capacitive current. Hence, this novel pilot protection scheme, based on FCIP, can be used for long distance high-voltage transmission lines. The faulty phase/phases can also be detected by the proposed scheme. Moreover, compared with a newlyintroduced protective scheme which is based on the fault component integrated impedance, the proposed FCIP-based scheme has faster operation speed. The efficiency of the proposed protective scheme is evaluated and approved over extensive simulation studies.

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Investigation of Power Differential Concept for Line Protection

Cited by 44 publications

References 8 publications

Data-Mining-Based Intelligent Differential Relaying for Transmission Lines Including UPFC and Wind Farms

Data-Mining-Based Intelligent Differential Relaying for Transmission Lines Including UPFC and Wind Farms

A New Differential Protection of Transmission Line Based on Equivalent Travelling Wave

Protection of transmission lines using fault component integrated power

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