Real-time Calculation Method of Three-core Cable Conductor Temperature Based on RBF Neural Network

Abstract

The invention discloses a method for real-time calculation of the temperature of a three-core cable conductor based on an RBF neural network. The method first measures the operating data of some parameters of the three-core cable, including the operating current of the three-core cable conductor, the real-time temperature of the outer skin of the cable, and the real-time temperature of the cable conductor; Then, the current of the three-core cable conductor and the temperature of the outer skin of the cable are used as input, and the real-time temperature of the cable conductor is used as the output to establish a three-layer feed-forward RBF neural network model; As a learning algorithm, train and determine the RBF neural network model with better performance; finally, input the real-time collected three-core cable conductor current and cable outer skin temperature into the trained RBF network, and then calculate and output the real-time temperature of the three-core cable conductor . The method of the invention can not be affected by the external complex environment and the physical parameters of the cable itself, and has the advantages of accurately and dynamically calculating the temperature of the conductor of the three-core cable.

Description

technical field [0001] The invention relates to a method for real-time calculation of the temperature of a three-core cable conductor based on an RBF neural network, and belongs to the technical field of three-core cable operation state monitoring. Background technique [0002] Ampacity is an important parameter of power cables. It refers to the long-term working temperature of the insulating layer that does not exceed the maximum operating current corresponding to the rated value. Accurate calculation and evaluation of ampacity are crucial to the safe operation of power cables and short-term expansion It has important engineering significance. The life of the cable mainly depends on the life of its insulation layer, and the conductor core temperature during the operation of the cable is the decisive factor affecting the life of the insulation material. For cables with different insulation materials, the allowable operating temperature is clearly stipulated. Under normal ov...

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Problems solved by technology

Although a very mature calculation model has been established in the traditional method, the above-mentioned methods have certain limitations. The transient thermal circuit model is established under many idealized conditions, and it is difficult to meet the engineering requirements in practical applications. The modeling process of the method is complex, and the calculation process takes a long time

In the existing technical literature, the research on the real-time temperature calculation method of the above-mentioned cable conductor is based on the high-voltage single-core cable, but the research on the real-time temperature calculation method of the three-core cable conductor is rarely involved.

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