Electric vehicle charging station modeling method for reliability assessment of power distribution network and application of electric vehicle charging station modeling method

Abstract

The invention discloses an electric vehicle charging station modeling method for reliability assessment of a power distribution network and application of the electric vehicle charging station modeling method. The method is characterized by including the steps: 1, establishing an electric vehicle running status time sequence model; 2, establishing an electric vehicle spatial and temporal distribution model; 3, on the basis of a dijkstra algorithm, calculating the sum of power batteries available for centralized charging in each charging station; 4, establishing a charging station output time sequence model based on reliability assessment; 5, adopting a Monte Carlo simulation method for realizing reliability assessment of the power distribution network with electric vehicles, and carrying out statistics of reliability indexes. Establishment of a more practical electric vehicle output model can be realized, centralized optimal control of the electric vehicles is improved, utilization rate of the electric vehicles serving as energy storage devices is increased, pressure of power shortage in load peak of the power distribution network is relieved, and accordingly reliability of the power distribution network can be further improved.

Description

technical field [0001] The invention relates to the field of distribution network reliability evaluation, in particular to an electric vehicle charging station modeling method for distribution network reliability evaluation and its application. Background technique [0002] Under the dual pressure of environmental pollution and energy shortage, electric vehicles with clean, pollution-free and energy-saving advantages have become an important research content in the field of new energy. From the perspective of the power system, the research on electric vehicles mainly focuses on the properties of their power batteries. After the large-scale electric vehicles are connected, the peak demand for electric energy in the distribution network will increase, and the charging load in the disordered mode will inevitably affect the power distribution system. Reliability has a certain impact. [0003] With the development of electric vehicles connected to the grid (Vehicle to Grid, V2G)...

AI Technical Summary

Problems solved by technology

The current research on electric vehicles as energy storage devices mainly focuses on using them to adjust the peak-to-valley load difference of the power grid, absorb new energy and apply them in the construction of distributed power sources and micro-grids. In terms of reliability evaluation, the existing research mainly focuses on Discussed the reliability assessment of the power generation and transmission system when electric vehicles are connected, and did not involve the reliability assessment of the distribution network, and the electric vehicles were only used as charging loads, which increased the peak load pressure of the distribution network and could not use electric vehicles as storage. can function

Although a few have studied the quantitative analysis of the impact of electric vehicle load on the reliability of distribution network, they have not involved the modeling of electric vehicle output. In addition, it is too ideal to simply use V2G technology to restore power supply for electric vehicles randomly scattered in the distribution network. , It is difficult to operate and it is difficult to control harmonic pollution

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