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A Dynamic Capacity Increase Method for Overhead Lines Based on Botdr Temperature Measurement Technology

An overhead line and dynamic capacity-increasing technology, which is applied to thermometers, heat measurement, and measurement devices, can solve the problems that the value cannot be fully utilized, the reliability is difficult to guarantee, and the application and promotion are difficult.

Active Publication Date: 2019-10-25
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its high equipment cost, difficult maintenance, and difficulty in ensuring reliability have restricted the application and promotion of the system in the power grid, and its value cannot be brought into full play.

Method used

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  • A Dynamic Capacity Increase Method for Overhead Lines Based on Botdr Temperature Measurement Technology
  • A Dynamic Capacity Increase Method for Overhead Lines Based on Botdr Temperature Measurement Technology
  • A Dynamic Capacity Increase Method for Overhead Lines Based on Botdr Temperature Measurement Technology

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Embodiment

[0060] Below is the step that adopts the specific embodiment of the present invention, as follows:

[0061] 1. Data collection to obtain the ambient temperature of the detected overhead transmission line

[0062] 1) The Brillouin optical time domain sensor uses the optical time domain analysis method to detect the incident pulse light. Under the specific optical frequency difference setting, the power of the incident pulse light and the excitation light can be obtained respectively, and then the optical fiber layout in the OPGW can be calculated. Gain for Liouin scattered light. According to the distribution of the gain, the frequency shift of the Brillouin scattered light of the optical fiber can be obtained, and the temperature distribution of the entire optical fiber can be calculated from the linear relationship between the frequency shift and the temperature.

[0063] When the fiber is not strained, the frequency shift of the Brillouin scattered light is linearly related...

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Abstract

The invention relates to a method for dynamically increasing the capacity of overhead lines, in particular to a method for dynamically increasing the capacity of overhead lines based on BOTDR temperature measurement technology. The invention uses the BOTDR temperature measurement technology on the OPGW to perform distributed measurement on the ambient temperature of the overhead line, deduces the conductor temperature through the Newton iterative method, and brings the real-time temperature bottleneck point of the conductor into a new heat balance formula to calculate the real-time ampacity. The calculation proves that this method can effectively improve the ampacity of the line, and has a theoretical guiding effect on the design and optimization of the ampacity of the line. This method does not require additional temperature sensing equipment, reduces the cost of general DTR equipment, is relatively simple to maintain, and has high reliability. It can be widely applied to power grids and give full play to the real capacity of transmission lines.

Description

technical field [0001] The invention relates to a method for dynamically increasing the capacity of overhead lines, in particular to a method for dynamically increasing the capacity of overhead lines based on BOTDR temperature measurement technology. Background technique [0002] Due to the resistance of the overhead transmission wire, when a certain load current flows, the resistance will "loss" a part of the electric energy and turn it into heat, and the wire will inevitably generate heat. Moreover, the temperature of the transmission wire will gradually rise with the increase of the load current. When the maximum allowable operating temperature of the wire is exceeded, it will inevitably be burned due to overcurrent and heat generation, which may cause the circuit breaker to trip. Therefore, we need to deeply excavate the hidden transmission potential of transmission lines without affecting the safety of power grid operation and without changing the structure of the origi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G01K11/32G01K11/322
CPCH02J3/00G01K11/32G01K11/322
Inventor 龚庆武杨安琪
Owner WUHAN UNIV
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