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Relay protection configuration method for overhead-GIL joint line

A hybrid line and relay protection technology, applied in the field of power transmission, to achieve safe and reliable operation escort, improve power transmission capacity and reliability

Active Publication Date: 2017-05-10
CEEC JIANGSU ELECTRIC POWER DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention provides a relay protection configuration method for overhead-GIL hybrid lines to solve the problem of accurate fault location of GIL-overhead line hybrid lines existing in the prior art, and improve power grid security and power supply level

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  • Relay protection configuration method for overhead-GIL joint line
  • Relay protection configuration method for overhead-GIL joint line
  • Relay protection configuration method for overhead-GIL joint line

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Embodiment Construction

[0038] Below in conjunction with embodiment the present invention will be further described.

[0039] Glossary:

[0040] GIL: Gas Insulated Metal Enclosed Transmission Line (Gas Insulated Line-GIL) is a high-voltage, high-current power transmission equipment that uses SF6 gas or a mixture of SF6 and N2 gas to insulate, and the shell and conductor are coaxially arranged.

[0041] PT: Potential transformer, the function is to change high voltage into low voltage, the secondary side is generally 100V, such as 10KVPT, which is 10KV / 100V, and the secondary side of PT cannot be short-circuited.

[0042] CT: Current transformer, which converts a large current into a small current, generally 5A or 1A, and the secondary side of the CT cannot be open.

[0043] Such as Figure 2-6 As shown, a kind of overhead-GIL hybrid line relay protection configuration method of the present invention comprises the following steps:

[0044] (1) Install PT and CT on both sides of GIL

[0045] Such a...

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Abstract

The invention discloses a relay protection configuration method for an overhead-GIL joint line. The method comprises the following steps of (1), mounting a potential transformer and a current transformer at two sides of a GIL; (2), configuring a current differential protection member on the GIL segment; (3), through the current differential protection member configured in the step (2), judging and positioning a fault point through different protection action behaviors; (4), configuring a protection signal communication device on transformer stations at two sides of the overhead-GIL joint line; and (5), configuring a blocking autorecloser of the overhead-GIL joint line. The relay protection configuration method aims at the overhead-GIL joint line; and a PT and a CT are mounted at two sides of the GIL, thereby increasing electric parameters in the line; a self uniform parameter of the GIL line segment is utilized for configuring routine line protection in the GIL segment, thereby realizing high identification accuracy and high fault positioning precision for the GIL fault segment in a relatively easy manner.

Description

technical field [0001] The invention belongs to the technical field of power transmission, and in particular relates to a relay protection configuration method. Background technique [0002] GIL is phase-separated insulation, and the transmission circuit is composed of three separate-phase pipeline buses, and each phase is composed of standard modules with a length between 12m and 18m. Its basic structure diagram is as figure 1 As shown, it consists of a grounding shell 1, a conductor 2, an inner sliding contact 3a, an outer sliding contact 3b, a pot insulator 4, an expansion joint 6, and a connecting conductor 7. [0003] As an advanced power transmission technology in today's world, GIL provides a compact, reliable and economical power transmission method with the following characteristics: large transmission capacity, low transmission loss, low electromagnetic radiation, good safety, high reliability, and long life. However, due to its relatively expensive price at pres...

Claims

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Application Information

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IPC IPC(8): H02H7/26G01R31/08
CPCG01R31/085H02H7/26
Inventor 朱东升查申森娄悦宗柳胡潇月赵娜鲁东海汤向洋朱红沈泓黄河
Owner CEEC JIANGSU ELECTRIC POWER DESIGN INST
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