Power transmission line dynamic capacity increasing method and system

A technology for dynamic capacity expansion and transmission lines, applied in circuit devices, AC network circuits, electrical components, etc., can solve the problems of inaccurate maximum current carrying capacity, line capacity expansion operation risks, etc., and achieve good engineering practical value and accuracy improvement. , calculate the exact effect

Active Publication Date: 2020-12-29
JIANGSU ELECTRIC POWER CO +1
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Problems solved by technology

The traditional dynamic capacity increase method uses the temperature of a small number of discrete temperature measurement points as the average temperature of the entire line to calculate the maximum ampacity of the transmission line when the capacity is increased. There are changes in wind speed, sunshine and other factors. It is inaccurate to replace the average temperature of the entire line with the temperature of the conductor at the measurement point. Therefore, the traditional dynamic capacity increase method is inaccurate in calculating the maximum carrying capacity, which brings risks to the line capacity increase operation.

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  • Power transmission line dynamic capacity increasing method and system
  • Power transmission line dynamic capacity increasing method and system
  • Power transmission line dynamic capacity increasing method and system

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0043] A method for dynamically increasing the capacity of a transmission line, comprising the following steps:

[0044] Step 1, using the distributed optical fiber temperature measurement method, based on the principle of back Raman scattering and optical time domain scattering, to obtain the steady-state temperature data / transient temperature rise data of various parts of the wire.

[0045] When implementing dynamic capacity increase, it may be a steady-state thermal balance or a transient temperature rise. Therefore, whether to obtain steady-state temperature data or transient temperature rise data depends on the actual situation; When the capacity increase is implemented on a time scale, th...

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Abstract

The invention discloses a power transmission line dynamic capacity increasing method and system. According to the method, the steady-state temperature data / transient temperature rise data of all partsof a wire are measured, a maximum steady-state current-carrying capacity / maximum transient current-carrying capacity are calculated through a neural network model, and the method is more accurate incalculation compared with a conventional method. Meanwhile, a previous round of result is used as training data of a new round of neural network model, the accuracy is further improved along with continuous accumulation of the actual operation data, and the method has good engineering practical value.

Description

technical field [0001] The invention relates to a method and system for dynamically increasing the capacity of a power transmission line, belonging to the technical field of power system automation. Background technique [0002] With the increase of the capacity of the urban transmission network and the increasing shortage of line corridor resources, it is of great significance to achieve considerable dynamic capacity increase without changing the corridor or the tower. Different positions of the same circuit have different allowable carrying capacity due to different wire types, geographical locations, whether they are heat-resistant wires, etc. The traditional dynamic capacity increase method uses the temperature of a small number of discrete temperature measurement points as the average temperature of the entire line to calculate the maximum ampacity of the transmission line when the capacity is increased. Due to changes in wind speed, sunshine and other factors, it is i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/10H02J2203/20
Inventor 汪惟源刘柏良程锦闽吴刚张瑞永赵新宇赵晶姚成尹恒
Owner JIANGSU ELECTRIC POWER CO
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