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Regional bus protection system of power distribution network and method

A busbar protection, network area type technology, applied in the direction of emergency protection circuit devices, electrical components, etc., to achieve the effect of improving power supply reliability, reducing the scope of fault power outages, and enhancing selectivity

Pending Publication Date: 2021-04-20
HENNAN ELECTRIC POWER SURVEY & DESIGN INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the technical problem of protection setting cooperation between the switch station at the end of the distribution line and the lower-level distribution room, and provides a new type of regional busbar protection system and method for the distribution network

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  • Regional bus protection system of power distribution network and method
  • Regional bus protection system of power distribution network and method
  • Regional bus protection system of power distribution network and method

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is some embodiments of the present invention, but not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the c...

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Abstract

The invention relates to a regional bus protection system of a power distribution network; the system is divided into a next-stage station and an upper-stage station, the next-stage station is a switching station / power distribution room, and a protection measurement and control integrated device and a regional bus protection device are configured in the switching station / power distribution room. A comprehensive bus protection device is configured at the upper-stage station; traditional functions such as sampling of current and voltage, acquisition of a position signal and an outlet of protection control are completed by the protection, measurement and control integrated device; a regional bus protection device is additionally arranged in a switching station / power distribution room, the regional bus protection device firstly has the principle and the function of conventional bus protection, various faults in a protection area should be reliably acted, and faults outside the protection area should not be acted. According to the invention, the protection selectivity of the series power supply line is enhanced, the reliability, selectivity, sensitivity and quick action required by relay protection are met, the fault power failure range is reduced, and the power supply reliability is improved.

Description

technical field [0001] The invention belongs to the analysis of the protection principle of a distribution network, specifically the research on the protection principle of an area-type busbar suitable for switching substations / distribution rooms with a voltage level of 35kV and below. Background technique [0002] The relay protection of 3kV~110kV power grid generally follows the principle of remote backup. Among them, the single-side power line of the 35kV and below power grid is generally equipped with three-stage overcurrent protection, and a composite voltage blocking element is added when necessary. For single-side power lines and branch lines with several lines in series, when the setting calculation is difficult to meet the requirements of selectivity, sensitivity, and quick-break performance at the same time, it is necessary to ensure that the sensitivity coefficient meets the requirements of the specification. brake to remedy. [0003] For series power supply line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/22H02H7/26
Inventor 钱海涛曹艳江永生马克吴娜赵莉董建峰童辉袁海满王丹潘震李明源
Owner HENNAN ELECTRIC POWER SURVEY & DESIGN INST
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