Method and device for evaluating reliability of power distribution network

Abstract

The invention provides a method and device for evaluating the reliability of a power distribution network. Firstly, a first fault recovery time index set and a first fault rate index set are obtained,then a second fault recovery time index set and a second fault rate index set are obtained, lastly, fault recovery time and fault rate of power distribution network equipment are predicted, and the reliability of the power distribution network is evaluated. The method and device for evaluating the reliability of the power distribution network have the advantages that technical indexes not satisfying the requirements of full sample partial derivative sensitivity of a neural network are deleted, thereby reducing the complexity of prediction model indexes, socioeconomic environment indexes satisfying the fault recovery time and fault rate relevance requirement are screened from preset socioeconomic environment indexes respectively through a Pearson correlation coefficient method, so that thecredibility of an evaluation result of the reliability of the power distribution network is improved, the accuracy of the evaluation result of the reliability of the power distribution network is ensured, and the method and device evaluating the reliability of the power distribution network are more line with the actual situation and business requirements.

Description

technical field [0001] The invention relates to the technical field of distribution networks, in particular to a distribution network reliability evaluation method and device. Background technique [0002] The reliability parameters required for distribution network reliability evaluation mainly include distribution network equipment failure rate, distribution network equipment failure repair time and switch switching time. There are mainly the fault recovery time and fault rate of distribution network equipment. However, there are many factors affecting the repair time and failure rate of distribution network equipment, which can be regarded as an index set. In the prior art, the model is usually established based on the distribution network reliability evaluation parameter index set provided by experts or recognized. Distribution network reliability evaluation parameters are predicted, ignoring the problems of information redundancy and influence in data modeling of distr...

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Problems solved by technology

[0003] In order to overcome the shortcomings of the low reliability evaluation results of distribution network reliability parameters in the prior art, the present invention provides a distribution network reliability evaluation method and device, first obtain the first fault repair time index set and the first The failure rate index set, and then obtain the second fault repair time index set and the second failure rate index set, and finally predict the fault repair time and failure rate of the distribution network equipment, and evaluate the reliability of the distribution network. The technical indicators that meet the partial derivative sensitivity requirements of the full sample of the neural network reduce the complexity of the prediction model indicators, and also screen out from the preset socio-economic environment indicators through the Pearson correlation coefficient method to meet the failure repair time and failure rate. The social and economic environment indicators required by the standard improve the credibility of the reliability evaluation results of the distribution network, ensure the accuracy of the reliability evaluation results of the distribution network, and are more in line with the actual situation and business needs.

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