Adaptive Current Protection Against Earth Faults in 6 – 10 kV Cable Networks

Shuin, V.A.; Dobryagina, O.A.; Shagurina, E. S.; Shadrikova, T.Yu.

doi:10.1007/s10749-019-00987-0

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…The modern concept of improvement of relay protection of electrical complexes and distribution networks, developed by scientific schools of Russia, is focused mainly on the development of simple and reliable current protections, as well as solving problems of detection of complex emergencies and protection of long-range redundancy [12][13][14]. The focus is on protection against single-phase earth faults [15], and the trend toward power generation close to the consumer, which requires consideration of a wider and more complex range of tasks, is practically ignored [16].…”

Section: Problem Statementmentioning

confidence: 99%

Adaptive current protection in electrical complexes with small power plants

Смирнов

Shklyarskiy

2021

E3S Web Conf.

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The article considers electrical complexes with power plants of small capacity. The influence of power generation sources on short-circuit current distribution has been investigated. Reduced sensitivity of back-up current protection and dependence of current distribution on power plant capacity are revealed. Recommendations for minimizing false operation of short-circuit protection in networks with distributed power generation are proposed. An algorithm for adaptive current protection, which uses graph theory to determine the stages of selectivity of relay protection based on finding the shortest Dijkstra path and calculation of equivalent resistance in networks with multiple sources of power generation, which provides selec-tivity and sensitivity of current protection when changing the generated power of generators and the structure of the distribution network is pre-sented. The algorithm uses communication lines with a central control unit to monitor the distribution network and update the current triggering of the relay protection in accordance with changes in the structure of the power grid. The proposed system is designed so that it can respond to dynamic changes in the structure of the network and the state of operation of power plants. Simulation modeling in the Matlab/Simulink software package was performed and the results of the algorithm are presented.

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Section: Problem Statementmentioning

confidence: 99%