A method and system for detecting and optimizing cable dielectric insulation level

Abstract

The invention provides a method for detecting and optimizing the insulation level of a cable medium. The method comprises the steps that S1, safety levels are quantized to be a parameter set through a symbol sequence; S2, the numeric type and non-numeric type parameter items of the cable medium are obtained and mapped to be calculation functions related to the parameter set; S3, the information of a detected cable is counted, and after symbol sequence subsets of the cable parameter items are worked out according to the calculation functions, a particle swarm and the particle optimization speed are built; S4, the total risk values and costs corresponding to the current optimization detection and the former optimization detection are determined; S5, whether the values meet the constraint condition at the same time or not is judged; S6, if yes, the next optimization detection is carried out and serves as the current optimization detection, and then S4 is carried out again, and if not, the process is ended, and the current costs and total risk values serve as the final cost and total risk value. Through the method, the insulation performance of the cable medium can be detected out, the detection accuracy and reliability are improved, the detection cost and workloads are reduced, and detection accuracy is ensured.

Description

technical field [0001] The invention relates to the technical field of distribution network cable detection, in particular to a method and system for detecting and optimizing cable dielectric insulation level. Background technique [0002] As the core component of the current urban distribution network, the distribution network cable has a large number of users affected by its safe operation, so it plays an important role in the safe operation of the power grid. Because the distribution network cables contain a large number of cable joints and are distributed underground, it is often difficult to detect the distribution network cable medium. At present, the detection of the cable medium of the distribution network is mainly to detect the insulation level performance of the cable medium. Among them, the insulation level of the cable medium is usually related to the cable specification, construction method, detection method, cable life, historical dielectric loss level, histor...

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Problems solved by technology

[0003] In the prior art, there are two methods for detecting the cable dielectric insulation level: 1. The DC superposition method is used, although it is relatively simple to use, but it is easy to cause damage to the cable dielectric insulation; 2. The step voltage method is used, although the method is relatively simple to use , but the detection accuracy is limited

In order to avoid the problems caused by the above two methods, in most cases, the regular detection method will be adopted, and it will be carried out in accordance with the regular maintenance regulations stipulated by the state. Insufficient detection capabilities and low reliability often increase the cost and workload of unnecessary detection, and there will also be a phenomenon that the accuracy of cable dielectric insulation level evaluation is affected by excessive detection

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