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Multi-level voltage control partition method for grid-connected electric vehicle charge-discharge-storage integrated station

A technology of voltage control partitioning and electric vehicles, which is applied in the direction of AC network voltage adjustment, AC network load balancing, etc., and can solve problems such as inaccurate partition schemes, errors, and high-dimensional clustering

Inactive Publication Date: 2016-05-04
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Description
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  • Application Information

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Problems solved by technology

As the scale of the power grid system increases, voltage control partitions are prone to high-dimensional clustering problems, resulting in inaccurate or even wrong partition schemes
However, the access of distributed power sources and electric vehicles has brought new challenges to the voltage control partition of the power grid.

Method used

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  • Multi-level voltage control partition method for grid-connected electric vehicle charge-discharge-storage integrated station
  • Multi-level voltage control partition method for grid-connected electric vehicle charge-discharge-storage integrated station
  • Multi-level voltage control partition method for grid-connected electric vehicle charge-discharge-storage integrated station

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Embodiment

[0058] Such as figure 1 As shown, the internal structure of the electric vehicle charge-discharge-storage integrated station is composed of the main control system (dispatch center), energy conversion system (multi-functional converter device), charge-discharge-storage battery replacement system, and ladder battery energy storage system. These four parts Unified scheduling by the main control system.

[0059]The all-in-one station is an important part of the future smart grid. Compared with the traditional charging station, it avoids the grid hazards caused by the disorderly charging of electric vehicles, and makes full use of the active energy storage system for grid-connected operation to provide value-added for the distribution network. Benefits, through the main control system to achieve multi-functional and multi-objective optimal operation. The functional advantages of the integrated station are: (1) peak shaving and valley filling: the integrated station collects elect...

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Abstract

The invention relates to a multi-level voltage control partition method for grid connection of an electric vehicle charging, discharging and storing integrated station, comprising the following steps: 1) establishing a model of an electric vehicle charging, discharging and storing integrated station; 2) defining a reactive power source from the perspective of a reactive power source 3) Establish a weighted CS multi-objective modularity index for evaluating the quality of voltage control partitions; 4) Perform multi-level step voltage control partitions; 5) Multi-scenario optimization of different functional behaviors of electric vehicle charging, discharging and storing integrated stations. Compared with the prior art, the invention effectively deals with the high-dimensional clustering problem, reduces the scale of the problem, and enables the algorithm to obtain a high-quality partition scheme with high calculation efficiency.

Description

technical field [0001] The invention relates to the technical field of power system safety analysis and operation control, in particular to a voltage control partition method for grid-connected charging, discharging and storage integrated stations of electric vehicles. Background technique [0002] With the large-scale popularization of electric vehicles, the integration of charge-discharge-storage stations as an important energy supply facility for electric vehicles has become a development trend. A series of voltage problems caused by the integration of integrated stations into the grid have become research hotspots. In the traditional power grid, reasonable voltage control partition is the basis of secondary voltage control, which is of great value to the reactive power voltage regulation and state estimation of the regional power grid. [0003] The voltage control partition problem is an NP problem. The partition method mainly focuses on finding a satisfactory solution....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/12H02J3/28
Inventor 李明韦钢郭运城国宗
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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