Transmission line switching combination scheme establishment method and device

A technology of transmission line and establishment method, which is applied in the direction of AC network voltage adjustment, power network operating system integration, information technology support system, etc., can solve the problem of high construction time and cost, and achieve good applicability

Active Publication Date: 2019-04-16
INST OF ECONOMIC & TECH STATE GRID HEBEI ELECTRIC POWER +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for establishing a switching combination scheme of a transmission line, so as to solve the technical problem in the prior art that the establishment time and cost of the switching combination scheme are relatively high

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  • Transmission line switching combination scheme establishment method and device
  • Transmission line switching combination scheme establishment method and device
  • Transmission line switching combination scheme establishment method and device

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Embodiment Construction

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] Please refer to figure 1 , figure 1 It is a schematic flowchart of a method for establishing a combination scheme of switching and switching transmission lines provided by an embodiment of the present invention. The method includes:

[0030] S101: Set the initial cut line number k and the maximum cut line number k max .

[0031] S102: Calculating the k-self-impedance of each node to be detected after k lines are cut off.

[0032] S103: Determine a k-line qualified scheme and a k-line unqualified scheme according to the k-self impedance of each node to b...

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Abstract

The invention provides a transmission line switching combination scheme establishment method and device. The method is applied to the technical field of power systems, and comprises steps: an initialcut-off line number k and the maximum cut-off line number kmax are set; k-self impedance of each to-be-detected node after the k lines are cut off is calculated; according to k-self impedance of eachto-be-detected node, a k-line qualified scheme and a k-line unqualified scheme are determined; the initial cut-off line number k is added to k+d according to a preset step d; if k+d < / = kmax, a node in the k-line unqualified scheme is regarded as a to-be-detected node, and the step of calculating k-self impedance of each to-be-detected node after the k lines are cut off is returned; and if k+d > kmax or the current to-be-detected node set is empty, current line switching combination scheme establishment is determined to be completed. The transmission line switching combination scheme establishment method and the device provided by the invention can quickly establish a switching combination scheme.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and more specifically relates to a method and device for establishing a switching combination scheme of a transmission line. Background technique [0002] In recent years, power construction has developed rapidly. With the increasing capacity of single machines, power plants, and substations, the increasing load and load density in cities and industrial centers, and the strengthening of the interconnection between power systems, the short-circuit current levels in power grids at all levels are constantly increasing. Increase. At present, short-circuit current exceeding the standard has become a common problem in my country's 220kV power grid. It is a major constraint factor for power grid planning and operation, power supply and substation access, and is not conducive to power grid planning and development. For this reason, controlling the short-circuit current at all levels to a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/14
CPCH02J3/14Y02B70/3225Y04S20/222
Inventor 周宁张章吴浩王颖邵华王涛袁博陈亮康伟申永鹏杨洋
Owner INST OF ECONOMIC & TECH STATE GRID HEBEI ELECTRIC POWER
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