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Real-time temperature prediction method and system for high-voltage cable core

A real-time temperature and high-voltage cable technology, which is applied to thermometers, thermometer applications, and measuring devices, can solve problems such as leading errors in prediction results, large thermal resistance and thermal capacity of cables and surrounding environments, etc., and achieve large leading errors and faster Effects of processing speed and accuracy improvement

Pending Publication Date: 2022-02-15
上海海能信息科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current prediction method calculates the cable core temperature based on the current high-voltage cable operating state. However, since the cable core current changes in real time, and the thermal resistance and heat capacity of the cable and the surrounding environment are large, the relaxation time of the thermal process is several hours. Therefore, there is a serious lead error in the prediction results of the temperature prediction based on the current high-voltage cable operation state quantity

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  • Real-time temperature prediction method and system for high-voltage cable core

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Embodiment 1

[0087] Taking the single-circuit three-phase 110kV-YJLW02XLPE single-core power cable laid in trenches as an example, the cable skin temperature and the cable skin temperature corresponding to a historical data collection time are obtained through finite element simulation under random load conditions within 7 days. The historical skin temperature change rate of the cable skin temperature, the cable core current and the historical cable core current change rate of the cable core current corresponding to the historical data collection time, the sampling time is 168 hours, and the sampling time interval is set to In 12 minutes, the change curve of the cable core circuit is as follows Figure 4 As shown, the change curve of cable skin temperature and cable core temperature is shown in Figure 5 as shown, Figure 5 The upper part of the curve is the change curve of the cable core temperature. Figure 5 A curve in the middle and lower part is the change curve of the cable skin te...

Embodiment 2

[0089] The temperature prediction model is trained based on the neural network machine learning method, and the first input data processing method, the second input data processing method and a prediction method based on the thermal circuit model are compared and analyzed. The first input data processing method The method considers the current data collection time and one historical data collection time, the second input data processing method considers the current data collection time and three historical data collection time, and the distance between the current data collection time and the adjacent historical data collection time The collection time interval and the collection time interval between two adjacent historical data collection moments are both 1 hour.

[0090] Preferably, for the first input data processing method, the number of neurons in the input layer of the temperature prediction model is 4, the number of neurons in the output layer is 1, the number of neuron...

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Abstract

The invention provides a real-time temperature prediction method and system for a high-voltage cable core, and relates to the technical field of high-voltage cable core temperature prediction. The method comprises the steps: S1, collecting the cable core data of a to-be-predicted high-voltage cable; S2, preprocessing the cable core data to obtain corresponding preprocessed data; and S3, inputting the preprocessed data into a pre-trained temperature prediction model to obtain a temperature prediction result, processing the temperature prediction result to obtain a corresponding predicted cable core temperature of the to-be-predicted high-voltage cable, and taking the predicted cable core temperature as a real-time temperature prediction result of the cable core of the to-be-predicted high-voltage cable. The method and the system have the beneficial effects that the predicted cable core temperature of the high-voltage cable core is obtained by acquiring the cable skin temperature and the cable core current at the historical data acquisition moment and the current data acquisition moment and combining with the temperature prediction model for processing, and parameters input into the temperature prediction model are few; and the processing speed can be increased and the accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of high-voltage cable core temperature prediction technology, in particular to a real-time temperature prediction method and system for a high-voltage cable core. Background technique [0002] High-voltage cables are an important carrier for power transmission. More high-voltage cables need to be used in the rapid development of cities, and the operating temperature of high-voltage cables needs to meet the specified value of the standard. Excessive temperature of the cable core will cause aging of the insulating material. Acceleration will cause danger, and the low temperature of the cable core will affect the power transmission efficiency. Therefore, with the extensive use of high-voltage cables, it is of great significance to predict the temperature of high-voltage cables. [0003] The current prediction method calculates the cable core temperature based on the current high-voltage cable operating state. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K13/00G06F30/27G06F17/18
CPCG01K13/00G06F30/27G06F17/18
Inventor 张锐钱之银张贤坤张禹吕世超卓睿邬彬
Owner 上海海能信息科技股份有限公司