Real-time computing method for three-core cable conductor temperature based on RBF neural network

Abstract

The invention discloses a real-time computing method for three-core cable conductor temperature based on a RBF neural network. The method comprises the following steps: firstly, measuring the running data of some parameters of a three-core cable, including running current of the three-core cable conductor, real-time temperature of cable peel and real-time temperature of cable conductor; establishing a three-layer forward feeding type RBF neural network model by taking the current of the three-core cable conductor and the real-time temperature of cable peel as input and taking the real-time temperature of cable conductor as output; taking the acquired running data of the three-core cable as a training sample, taking an ant colony optimization as a learning algorithm, training and confirming the RBF neural network model with higher performance; inputting the real-time collected current of the three-core cable conductor and real-time temperature of cable peel to the trained RBF network, thereby calculating and outputting the real-time temperature of the three-core cable conductor. The method provided by the invention is not influenced by outside complex environment and cable physical parameters and has the advantage of capability of accurately and dynamically calculating the temperature of the three-core cable conductor.

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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