A Resilience Improvement Method of Distribution Network Based on Real-time Failure Rate

Abstract

The present invention relates to a distribution network toughness improvement method based on real-time failure rate, including: constructing a distribution network component failure rate model according to internal and external factors affecting the distribution network component failure rate; according to the distribution network component failure rate model, Divide the power system into multiple "feeder partitions" by means of component combinations, and calculate the failure rate and average fault recovery time of each partition; obtain the resilience evaluation of the power system according to the failure rate and average fault recovery time of each partition Indicators; according to the power system resilience assessment indicators, determine the weak link of the distribution network, and improve the resilience of the weak link. Compared with the prior art, the present invention evaluates the resilience of the distribution network in real time according to the direction and level of the typhoon. The evaluation process is clear and simple, and the weak link of the system can be accurately found, thereby ensuring the follow-up and reliable improvement of the resilience of the distribution network.

Description

technical field [0001] The invention relates to the technical field of power system analysis, in particular to a method for improving resilience of distribution networks based on real-time failure rates. Background technique [0002] As an important part of the power network, the distribution network is responsible for the transmission of electric energy for industrial, commercial and household users, which directly affects the quality of power supply to users. The economic loss is huge, and it also brings inconvenience to people's life, causes social disorder, and even causes serious consequences such as national defense security and social unrest. [0003] With the increasing penetration of the power system in all walks of life, how to ensure the normal power supply of the distribution network has become a global problem. In recent years, due to the impact of natural disasters such as strong typhoons and earthquakes, large-scale power outages have occurred frequently in d...

AI Technical Summary

Problems solved by technology

In this context, scholars at home and abroad have introduced the concept of "resilience" to quantify the ability of the power system to cope with disturbances. At present, the resilience assessment of the distribution network is usually studied from two aspects: qualitative assessment and quantitative assessment. Qualitative assessment is usually Different aspects of power system operation are considered, and quantitative evaluation is often based on the quantification of system functions; traditional methods for improving the resilience of distribution networks are mainly line reinforcement and overhead line cabling, etc., but such methods are often expensive. It is greatly affected by terrain factors and cannot be widely used

At present, scholars at home and abroad do not have a unified process and specification for the definition and evaluation of distribution network resilience.

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