Active power distribution network information physical system reliability evaluation method considering information failure

Abstract

An active power distribution network information physical system reliability evaluation method considering information failure comprises the steps: constructing a typical framework of an active powerdistribution network information physical system CPS, wherein a physical system comprises primary equipment and a distributed energy source DG, and an information system is divided into an applicationlayer, a communication layer and an interface layer; establishing a DG and load model, an information physical element model and an information transmission reliability model; in combination with theindirect effect of information failure on the power distribution self-healing process, quantitatively analyzing the influence of failure of an information system application layer, a communication layer and an interface layer on fault isolation, positioning and power supply recovery in an uncertain environment; employing a sequential Monte Carlo method and a non-sequential Monte Carlo method to sample a physical element and an information element respectively; by means of example simulation, carrying out the sensitivity analysis from the aspects of distributed power supply capacity, island operation mode, information element and information transmission abnormity and access network structure, wherein the accuracy and effectiveness of the method are verified through the obtained result, and suggestions and guidance are provided for construction of the active power 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 evaluation methods of active distribution network only focus on the physical system, ignore the influence brought by the information system, and do not take the CPS of the active distribution network as the overall research object, and cannot accurately reflect the real performance of distribution reliability.

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