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Selection method of conductor cross-section for power delivery project

A technology of power transmission and conductor cross-section, applied in electrical digital data processing, special data processing applications, instruments, etc., which can solve the problem of real-time correction of economic current density, difficulty in accurately obtaining the economic cross-section of power conductors, and failure to consider power output characteristics, etc. problem, to achieve the effect of solving the difference in output characteristics

Active Publication Date: 2018-06-01
STATE GRID CORP OF CHINA +2
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AI Technical Summary

Problems solved by technology

Although this method is simple to operate, it does not consider the actual output characteristics of the power supply, and the economic current density needs to be corrected in real time
Therefore, it is difficult to accurately obtain the economic cross-section of power wires by this calculation method.

Method used

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  • Selection method of conductor cross-section for power delivery project
  • Selection method of conductor cross-section for power delivery project
  • Selection method of conductor cross-section for power delivery project

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Embodiment Construction

[0032] Such as figure 1 As shown, it is a method flow chart of the wire section selection method of the power delivery project of the present invention, which specifically includes the following steps:

[0033] S1. Obtain multi-year operating data of existing similar power supply projects, including wire resistance, real-time power collection of lines, rated voltage of wires and annual collection points;

[0034] S2. According to the data obtained in step S1, calculate the annual average cumulative real-time power loss of the power supply:

[0035] Use the following formula to calculate:

[0036]

[0037] in is the annual average cumulative real-time power loss of the power supply; I t is the real-time current of the wire; R l is the wire resistance; P t Collect power for the line in real time; U e is the rated voltage of the conductor; n is the number of points collected throughout the year.

[0038] S3. According to the annual average cumulative real-time power lo...

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Abstract

The invention discloses a conductor section selection method for power transmission projects. The conductor section selection method comprises the following steps: acquiring multiple yearly operation data of the similar power transmission projects; calculating anneal mean accumulated real-time loss power of a power supply; calculating yearly operation equivalent mean current and a yearly operation equivalent mean current percentage of the power supply; calculating yearly operation loss expenses of the power transmission projects; calculating a total discounting expense of the power transmission projects within a full-life period range; selecting a conductor type with the smallest total discounting expense of the power transmission projects within the full-life period range, and finishing conductor section selection of the power transmission projects. Aiming at the conductor section selection on an appointed power supply, the invention provides a yearly operation loss equivalent mean current concept, so that the problem of a difference between output force characteristics of the power supplies is solved, the economical differences of different types of power supplies in the aspects of scales, the output force characteristics and resources are embodied, a convenient, reliable and economical selection method is provided for a power supply conductor section, and the leaning level of design and plan of a power grid line is enhanced.

Description

technical field [0001] The invention belongs to the field of electric power engineering, and in particular relates to a method for selecting a cross section of a wire in a power transmission project. Background technique [0002] With the development of the country and the improvement of people's living standards, power construction is gradually accelerating. The selection of conductor cross section is an important task in the engineering design of transmission lines. How to choose the economic cross-section of the wire is directly related to the operating efficiency of the line in the whole life cycle. [0003] At present, the actual transmission line engineering design generally adopts the selection of conductor cross-section according to the economic current density. Although this method is simple to operate, it does not consider the actual output characteristics of the power supply, and the economic current density needs to be corrected in real time. Therefore, it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCY02E60/00
Inventor 文明谢欣涛侯益灵肖帅廖菁
Owner STATE GRID CORP OF CHINA
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