Active distribution network multi-view collaborative vulnerability assessment method considering effects of information system

Abstract

The invention provides an active distribution network multi-view collaborative vulnerability assessment method considering effects of an information system, which comprises the steps of firstly building a definiteness-randomness topology structure model in allusion to the occurrence randomness of an external disaster of a distribution network; determining the multi-time-scale collaborative influencing information / physical component failure probability under a disaster condition based on system panoramic information; then building an active distribution network function group failure probability model considering effects of the information system; performing assessment on various operating states and grid structures of an active distribution network under a source network load interaction mode, building an active distribution network and information system integrated vulnerability assessment system under the source network load interaction mode, and assessing the collaborative vulnerability between the distribution network structure and the operating stage and between a physical system and the information system at the same time; and finally building a local collaborative vulnerability index system, a regional collaborative vulnerability index system and a global collaborative vulnerability index system on the space scale, and assessing the vulnerability of the active distribution network more comprehensively and more specifically.

Description

technical field [0001] The invention relates to the field of power distribution technology, in particular to a multi-view collaborative vulnerability assessment method for an active distribution network considering the role of an information system. Background technique [0002] With the continuous introduction of information technology and the rapid development of active distribution network, distribution network has become a complex cyber-physical system integrating physics and information communication technology. Especially in recent years, extreme external disasters and attacks on information systems have occurred frequently, so it is particularly important to conduct multi-perspective collaborative vulnerability assessments for active distribution networks that consider the role of information systems. [0003] At present, the vulnerability assessment methods of the power grid: when analyzing the failure probability of the distribution network under disaster conditions...

AI Technical Summary

Problems solved by technology

[0003] At present, the vulnerability assessment methods of the power grid: when analyzing the failure probability of the distribution network under disaster conditions, some only consider the physical system components, but do not consider the failure probability of the information system components, and most of them do not consider the whole life cycle of the physical information components during the disaster period. Due to the synergistic influence of multiple time scales of the external environment, the probability prediction is not accurate enough; when establishing the topology model of the distribution network, some only consider the deterministic topology model of the distribution network itself, and do not consider the randomness of external disasters under disaster conditions impact; some did not consider the impact of the information system on the vulnerability of the active distribution network in the important links of the source network and load when analyzing the vulnerability indicators of the active distribution network, making the evaluation results too one-sided and not suitable for reality; some When considering the distribution network vulnerability index, only the complex network theory and the risk effect theory are used to analyze the grid structure and operation status of the distribution network, without considering the synergy between the actual active distribution network and the information system As well as the synergy between the grid structure and operating status, the evaluation results are not comprehensive enough; at present, the vulnerability indicators of the distribution network are mostly considered from a single part, and the vulnerability of the regional and global distribution network is not analyzed from the spatial scale. Evaluation is not enough to provide a basis for distribution network risk warning

Images