Modeling method of oplc thermal circuit model based on superposition principle

Abstract

The invention relates to an OPLC thermal circuit model modeling method based on the superposition principle, which belongs to the technical field of power cable detection. The steps of the present invention are: using COMSOL software to realize the simulation of the temperature field of OPLC; establishing the thermal circuit model of OPLC four-core heating and single-core heating, and establishing the thermal circuit model of OPLC three-core heating according to the superposition theorem; adopting particle swarm The algorithm identifies the parameters of the OPLC thermal path model when the three cores are heating; according to the identification results, the OPLC optical fiber position thermal path model is established. The present invention applies the principle of superposition to superimpose the heat path models under the two different conditions of OPLC four-cable core heating and single-cable core heating to obtain a more accurate thermal path model under the condition of OPLC three-cable core heating, which effectively improves the The rationality of OPLC thermal circuit model establishment. Using the particle swarm algorithm to identify the parameters in the thermal circuit model, the model parameters are optimized, and the accuracy of the temperature calculation values ​​of each layer inside the OPLC is effectively improved. Engineering applications are of great significance.

Description

technical field [0001] The invention belongs to the technical field of power cable detection. Background technique [0002] Optical Fiber Composite Low-Voltage Cable (OPLC) organically combines the optical unit with the power cable, without the need for secondary wiring, effectively reducing construction costs and network construction costs. Compared with the traditional FTTH (Fiber To The Home), using OPLC as a smart grid user terminal access solution can save a lot of resources, not only solve the power problem of domestic electricity, but also solve the problem of optical fiber communication such as broadband access. The role is huge, and it will greatly promote the realization of the "last mile" of the optical access network. The introduction of OPLC facilitates the establishment of smart electricity-consuming households that interact with the grid. In the long run, optical fiber composite low-voltage cable OPLC will play an important role in the construction of smart ...

AI Technical Summary

Problems solved by technology

At present, most of the thermal circuit models established in the literature adopt the approximate equivalent method, the parameter accuracy of the model is low, and the calculated temperature error is large

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