Reed switch protection of double-circuit lines without current and voltage transformers

被引：0
|
作者：
Kletsel, M. Ya. [1 ]
Mashrapov, B. E. [1 ]
Mashrapova, R. M. [1 ]
机构：
[1] Toraighyrov Univ, Lomov Str 64, Pavlodar 140008, Kazakhstan
来源：
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS | 2023年 / 154卷
关键词：
Protection of double-circuit lines; Sequence of actuation of the reed switches; Selection of operation parameters; Algorithm of operation; Determine the fastening point; Structure for fastening;
D O I：
10.1016/j.ijepes.2023.109457
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Protection of 6-35 kV double-circuit lines from the supply side is suggested. It allows saving copper, steel, and high-voltage insulation in amounts unprecedented for relay protections. The protection is based on the control of sequence of actuation of reed switches fastened near the corresponding phases at a safe distance and of the time & UDelta;t between their actuation. The effect of all possible errors on & UDelta;t is studied and the number of reed switches required to be mounted near the phases of the lines is determined. The peculiarities of selection of & UDelta;t and inductions for the protection operation, points of reed switch mounting, sensitivity estimates, and the fields of use of the protection are analyzed. An example of the selection is considered. The protection operation algorithm is formulated and written in the form of switching algebra functions with allowance for the protection operability in the case of reed switch failures. The correct operation of the protection is shown in all actual modes of operation of the lines (including the failure of one of reed switches). A construction for fastening reed switches at a safe distance from the line phases is presented.
引用
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页数：13
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