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Detection method for current-carrying capacity of overhead conductor

An overhead wire, flow detection technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as high equipment cost and waste of resources

Active Publication Date: 2012-12-19
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1
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  • Claims
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Problems solved by technology

[0004] Based on this, it is necessary to provide a method for detecting the ampacity of overhead conductors for the above-mentioned problems of high equipment cost and waste of resources in the prior art

Method used

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  • Detection method for current-carrying capacity of overhead conductor
  • Detection method for current-carrying capacity of overhead conductor
  • Detection method for current-carrying capacity of overhead conductor

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Embodiment Construction

[0017] The specific implementation of the method for detecting the ampacity of overhead conductors of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] figure 1 A flow chart of the method for detecting the ampacity of an overhead conductor according to an embodiment is shown, which mainly includes the following steps:

[0019] S100, detecting the wire temperature and the ambient temperature of the overhead wire to be tested, and obtaining at least two sets of wire temperature values ​​and ambient temperature values;

[0020] S200, according to the temperature value of the wire, the ambient temperature value and the current value of the overhead wire to be tested, calculate the functional relationship between the current of the wire and the temperature rise of the wire;

[0021] S300. Calculate the maximum current carrying capacity of the tested overhead wire at a set temperature according to the functional relation...

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Abstract

The invention provides a detection method for current-carrying capacity of an overhead conductor. The detection method comprises the following steps of: detecting conductor temperature and environment temperature of the overhead conductor to be detected to acquire at least two groups of conductor temperature values and environment temperature values; calculating a functional relation of conductor current and conductor temperature rise according to the conductor temperature values, the environment temperature values and a current value of the overhead conductor; and calculating maximum current-carrying capacity of the detected overhead conductor at set temperature according to the functional relation. According to the technology, data and equipment to be detected are less, the data operation process is simple, the result reliability is high, the detection cost is greatly reduced while the detection accuracy is guaranteed, the maximum current-carrying capacity of the conductor can be quickly and simply detected in a peak load period, unnecessary power failure is reduced, the power transmission capacity of the overhead conductor is improved, and particularly, the detection method has great significance of popularization to a low-voltage power distribution network.

Description

technical field [0001] The invention relates to the detection technology of the ampacity of a wire, in particular to a method for detecting the ampacity of an overhead wire. Background technique [0002] At present, the maximum allowable current carrying capacity of transmission lines in my country is often the limit value determined under static conditions with sufficient or even excessive safety margins. This limit value is conservatively based on the worst weather conditions (such as sunny days, high temperature, no wind, etc.), in order to maintain a safe distance from the line to the ground. Most countries adopt different boundary conditions according to their natural environment, among which the boundary conditions stipulated by our country are the most stringent, so the transmission capacity of overhead wires cannot be fully utilized. [0003] The existing technologies for increasing the transmission capacity of overhead conductors mainly include dynamic capacity exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 张鸣阮班义刘刚叶健威刘志陆林杰
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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