A Reliability Evaluation Method of Active Distribution Network Cyber-Physical System Considering Information Failure

Abstract

A reliability evaluation method for active distribution network cyber-physical system considering information failure, constructing a typical architecture of active distribution network cyber-physical system CPS, physical system includes primary equipment and distributed energy DG, information system is divided into application layer, communication layer layer and interface layer; established the DG and load model, information physical component model, and information transmission reliability model; combined with the indirect effect of information failure on the self-healing process of power distribution, quantitatively analyzed the information system application layer, The impact of communication layer and interface layer failures on fault isolation, location, and power supply restoration; Sequential and non-sequential Monte Carlo methods are used to sample physical elements and information elements respectively, and examples are used to simulate distributed power supply capacity and island operation Sensitivity analysis is carried out from the perspective of method, information components and information transmission anomalies, and access network structure. The results verify the accuracy and effectiveness of the proposed method, and provide suggestions and guidance for the construction of active distribution network.

Description

technical field [0001] The invention belongs to the technical field of reliability of an active distribution network under a smart grid, and in particular relates to a reliability evaluation method of an active distribution network considering information failure. Background technique [0002] In recent years, with the increasingly serious problems of resource consumption and environmental pollution, the development of renewable energy has received more and more attention. Renewable energy has become an important means to deal with the shortage of fossil fuels, climate change, energy security and other issues. With the increasing penetration of distributed energy (distribution generation, DG), a large number of DGs are connected to the distribution network, which changes the power supply structure and operation mode of the traditional distribution network, and brings problems such as node voltage exceeding the limit and island operation. series of questions. The traditional...

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Problems solved by technology

Most of the traditional reliability assessment methods for active distribution networks only focus on physical systems, ignore the impact of information systems, and do not take active distribution network CPS as the overall research object, and cannot accurately reflect the real performance of distribution reliability.

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