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Dynamic current carrying capacity predication method for electric transmission and distribution circuit based on microenvironment monitoring

A technology for power transmission and transformation lines and environmental monitoring, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of cumbersome steps and high detection costs, and achieve the effect of simplifying the acquisition steps.

Pending Publication Date: 2021-06-25
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO +2
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the current ampacity prediction method of transmission lines is based on meteorological conditions, and many environmental parameters need to be collected, and there are technical problems of cumbersome steps and high detection costs

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  • Dynamic current carrying capacity predication method for electric transmission and distribution circuit based on microenvironment monitoring
  • Dynamic current carrying capacity predication method for electric transmission and distribution circuit based on microenvironment monitoring

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Embodiment Construction

[0024] The specific embodiments of the present invention will be further specifically described below through specific embodiments in conjunction with the accompanying drawings.

[0025] Such as figure 1 Shown, embodiment one comprises the following steps:

[0026] B1. A medium is introduced between the inner core of the cable and the insulating layer, and the temperature T of the inner core of the cable is obtained through the heat exchange of the medium. 缆 ;

[0027] B2. Export the medium and heat the medium outside the cable to the T 电缆 Then stop heating;

[0028] B3. Set aside the heated medium for a time t and calculate the average temperature change rate;

[0029] B4. According to the temperature average rate of change obtained in B3, the medium heat dissipation area, the medium specific heat capacity, and the specific heat capacity of the cable inner core material construct the mathematical model of the heat dissipation efficiency Vi of the transmission line; step B...

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Abstract

The invention provides a dynamic current carrying capacity predication method for an electric transmission and distribution circuit based on microenvironment monitoring, and the method comprises the following steps: B1, introducing a medium between a cable inner core and an insulating layer, and obtaining the temperature T cable of the cable inner core through the heat exchange of the medium; B2, leading out the medium, and stopping heating after the medium is heated to the T cable outside the cable; B3, standing the heated medium for time t, and calculating the average change rate of the temperature; B4, constructing a mathematical model of the heat dissipation efficiency Vi of the power transmission line according to the average temperature change rate, the medium heat dissipation area, the medium specific heat capacity and the cable inner core material specific heat capacity obtained in the step B3; and B5, according to the heat dissipation efficiency Vi of the power transmission circuit, the current cable inner core temperature Tcable and the cable inner core temperature safety upper limit Tmax, calculating the capacity-expandable current-carrying capacity delta I.

Description

technical field [0001] The invention relates to the field of dynamic capacity increase of a power system, in particular to an intelligent monitoring system for micro-environment of a power transmission line. Background technique [0002] With the development of urban construction, the construction of new districts is proceeding rapidly. With the development and construction of new districts, the urban power distribution line network needs to be constructed to meet the needs of urban construction and development. There are two types of distribution lines: overhead lines and cable lines. The line is erected in the air, fixed on the iron tower with insulator strings, and insulated with air. The advantages are low investment and short construction period, but the number of lines that can be erected on the same path is small, which affects the overall power supply capacity, and at the same time affects urban planning and aesthetics. The one-time investment of cable lines is more,...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/08G06F113/16
CPCG06F30/20G06F2119/08G06F2113/16
Inventor 钟宏伟陈金刚段军殷伟斌梁樑丁一岷陈鼎周旻顾曦华江洪曾东葛黄徐钱伟杰郭创新丁一叶承晋方攸同李志余绍峰高一波胡景博
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO
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