About Approach To Solution of Problem Of Protection Against Earth Faults in 6-10 kV Cable Networks With Different Neutral Grounding Modes

Shuin, V.A.; Dobryagina, O.A.; Shadrikova, T.Yu.

doi:10.1109/rpa47751.2019.8958328

Cited by 2 publications

(1 citation statement)

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“…Reliable operation of relay protection equipment, increasing the security and uninterrupted power supply is largely determined by the neutral modes of electric networks. The regimes of "free" or grounded at most enterprises through an arcing reactor (ACR), neutrals of electric networks of 6-10 kV are not optimal, as they do not provide reliable protection against SPEF, often contribute to the appearance of overvoltages in the damaged and undamaged phase, 1165 create conditions for the development of ferroresonant processes in the network [1], [2]. Recently introduced at many industrial associations high-resistance resistor neutral grounding allowed to solve many of these problems.…”

Section: Introductionmentioning

confidence: 99%

Method for automatic compensation of a single-phase earth fault

et al. 2021

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The paper demonstrates improving the reliability of power supply and operating safety of power receivers in electric networks of 6-10 kV, by controlling the neutral mode in extended electric networks of 6-10 kV with capacitive earth fault currents above 15 A. The purpose of the study is to increase the reliability of power supply and the safety of operation of power receivers in such electric networks, the establishment of patterns in controlling the neutral mode in extended 6-10 kV electric networks with capacitive earth fault currents above 15 A, as well as the development of a method and device automatic detection of single-phase earth fault current. Grounding methods and neutral modes in electric networks with a voltage of 6-10 kV are considered. The method and device for automatically determining the current of a single-phase earth fault were developed. In the result, the relationship between the active and inductive components of the neutral current during series RL grounding of the network Ia/IL=(0.5÷0.3) was established, which ensures reliable operation of the SPEF protection of both current and directional principles including the changes of capacity abruptly networks caused by switching outgoing lines.

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Section: Introductionmentioning

confidence: 99%