OPLC thermal circuit modeling method based on superposition principle

Abstract

The invention provides an OPLC thermal circuit modeling method based on a superposition principle, and belongs to the technical field of power cable detection. The method includes the steps of using COMSOL software to achieve the simulation of an OPLC temperature field; building thermal circuit models under the situations of OPLC four-core heat emitting and single-core heat emitting, and accordingto the superposition principle, building a thermal circuit model of OPLC three-core heat emitting; using a particle swarm algorithm to conduct parameter identification on the thermal circuit model ofOPLC three-core heat emitting; according to an identification result, building an OPLC optical fiber position thermal circuit model. According to the method, by using the superposition principle, superposition is conducted on the thermal circuit models under the two different situations of OPLC four-cable core heat emitting and single-cable core heat emitting, the accurate thermal circuit model under the situation of OPLC three-cable core heat emitting is obtained, and the building reasonability of the OPLC thermal circuit model is effectively improved. By using the particle swarm algorithm,parameters in the thermal circuit model are identified, the model parameters are optimized, the accuracy of temperature calculation values of all layers inside OPLC is effectively improved, and the method is of great significance for mastering the operation state of the OPLC, improving the reliability of OPLC operation and achieving the engineering application of the OPLC.

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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