Reliability assessment method of distribution network connected to high penetration power source and electric vehicle

Abstract

The invention discloses a method for evaluating the reliability of a power distribution network connected to a high-permeability power supply and an electric vehicle, which includes: according to the travel behavior data of the electric vehicle, and fitting the daily travel distance and the end time of the daily trip to obtain the arrival time of the electric vehicle The probability distribution function of the driving distance and arrival time of each destination; based on the battery charge state of the electric vehicle, set the dispatching level of the electric vehicle, and make the electric vehicle discharge in an orderly manner according to the dispatching level according to the probability distribution function; The corresponding reliability assessments are carried out for different states of the network. According to the probability distribution function, the electric vehicles are discharged in an orderly manner according to the scheduling level, the number of dimensions of the particle swarm is reduced, and the operation time and convergence of the particle swarm algorithm are improved.

Description

technical field [0001] The invention belongs to the technical field of distribution network operation and control, in particular to a method for evaluating the reliability of a distribution network connected to high-permeability power sources and multiple loads. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] A large number of distributed power sources are connected to the distribution network, which improves the power supply capacity of the distribution network to a certain extent, but the uncertainty of distributed power sources and multiple loads also poses severe challenges to the power supply reliability of the distribution network. Accurately assessing the reliability of new distribution networks with distributed power sources and multiple loads can provide certain theoretical support for the expansion and planning of future distrib...

AI Technical Summary

Problems solved by technology

Secondly, the research on the reliability assessment of low-penetration distributed generation connected to the distribution network is relatively in-depth, but after the high-penetration distributed generation is connected to the distribution network, the assumptions of traditional distribution network reliability evaluation are no longer applicable

[0005] First of all, the assumption of unlimited upper-level system capacity is no longer valid. High-penetration distributed power supplies will bear 30% or more of the system load in the system. If the distributed power supply fails and is out of operation, the system area will also experience load reduction.

Secondly, even if the non-power components in the system do not fail or stop running, the system will still fail to match the load demand due to the fluctuation of distributed power output and the uncertainty of multi-load demand such as electric vehicles. Can cause regional faults in the distribution network and cause load shedding in islands

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