Development of non-communication relays for transmission and distribution systems

Bo, Z.Q.; Dong, X.Z.; Caunce, B J; Richards, S.

doi:10.1049/cp:20040072

Cited by 11 publications

(3 citation statements)

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“…Current differential protection has been playing an important role in transmission line protection [3,4]. The longitudinal current differential protections use the differential current between both ends of the lines and need a communication link [5][6][7][8]. The conventional cross-differential relay is based on the comparison between the current amplitudes of two parallel lines, and it identifies an internal fault when the difference between the two currents exceeds a certain threshold.…”

Section: Introductionmentioning

confidence: 99%

A cross-differential protection scheme for quadruple-circuit lines with asymmetric parameters

Liu

Tai

Fan

et al. 2015

Int. Trans. Electr. Energ. Syst.

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SUMMARYQuadruple-circuit lines with asymmetric parameters have been widely built to increase power transmission capacity. The asymmetric parameters of the lines lead to different current characteristics compared with traditional lines. A cross-differential protection scheme based on negative sequence fault current is proposed to overcome the deficiency of traditional protection scheme. The fault superimposed networks of quadruplecircuit lines are discussed to analyze the fault sequence currents of each line. Differential currents are deduced to form the relay criterion. The threshold values of protection are calculated according to characteristics of superimposed fault sequence currents. Corresponding operational logic is also introduced to ensure the stability and reliability of protection. Finally, the reliability of the proposed protection scheme is verified.

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Section: Introductionmentioning

confidence: 99%

A cross-differential protection scheme for quadruple-circuit lines with asymmetric parameters

Liu

Tai

Fan

et al. 2015

Int. Trans. Electr. Energ. Syst.

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“…The dramatic growth in signal processing power of relay platforms, and the availability of suitable communication schemes have provided a new opportunity to revisit the concept of integrated protection. Research shows that information obtained from multiple power plants and components can be used to derive new protection principles and schemes, which could have significant advantages over the existing protection techniques based on individual plant or component [11][12][13][14][15][16][17][18][19][20][21][22][23] when supported by modern communication technology [24] . This paper presents an integrated relay and its associated protection scheme based on the combination of a number of protection algorithms.…”

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confidence: 99%

Integrated protection scheme for power line

Bo¹,

Shi

Xiang

2008

Trans. Tianjin Univ.

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“…At the same time, the dramatic growth in signal processing power of relay platforms, and the availability of suitable communications schemes, has provided a new opportunity to develop new protection techniques. Research shows that information obtained from multiple power plants and components can be used to derive new protection principles and schemes, which could have significant advantages over the existing protection techniques based on individual plant or component [15][16][17][18][19][20][21][22][23][24][25][26][27]. Recently, a novel integrated protection scheme based on fault transient detection is proposed [28].…”

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confidence: 99%

Overcurrent Relay based Integrated Protection Scheme for Distribution Systems

Bo¹,

Xiang

et al. 2006

2006 International Conference on Power System Technology

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This paper reports on the development of integrated protection for power system. The background of the development is firstly introduced, in which a centralized protection system (or relay) provides the protection of multiple power plant or a substation. A novel integrated protection scheme for distribution system is described. The scheme is based on overcurrent protection technique, in which specially designed protection relays are installed at each substation of a network. In the proposed scheme, one integrated relay is responsible for the protection of every line sections connected to the substation busbar. The conventional directional overcurrent and new adaptive accelerated protection algorithms are implemented into the relay with multiple overcurrent settings to cover all the protected line sections. The paper includes studies of a typical multi section distribution network to demonstrate the principle of the scheme. Studies show that the new scheme not only offer the new protection features for individual power line, but also provide the characteristics of integrated protection.

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Development of non-communication relays for transmission and distribution systems

Cited by 11 publications

References 0 publications

A cross-differential protection scheme for quadruple-circuit lines with asymmetric parameters

A cross-differential protection scheme for quadruple-circuit lines with asymmetric parameters

Integrated protection scheme for power line

Overcurrent Relay based Integrated Protection Scheme for Distribution Systems

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