Economic dispatching method based on flexible transformer area

Abstract

The invention discloses an economic dispatching method based on a flexible transformer area, which adopts a converter and an energy storage device to transfer inter-transformer-area load, and specifically comprises the following steps: S1, setting an objective function of economic dispatching for balancing the transformer area load rate, reducing the energy storage electricity purchasing cost andreducing the transformer area heavy load rate; S2, constructing power models of a transformer, a converter and an energy storage device in the transformer area; S3, setting constraint conditions whichare based on the power model and accord with actual working condition operation; S4, inputting various parameters of the flexible transformer area; and S5, solving an economic dispatch result, wherein the economic dispatch result comprises a day-ahead power plan of the transformer, the converter and the energy storage device. According to the economic dispatching method, the converter and the energy storage device are adopted to transfer the inter-transformer-area load, and complete balance of the transformer area load rate is realized, the operation cost and the electricity purchasing cost are reduced, and the transformer area heavy load rate is reduced.

Description

technical field [0001] The invention belongs to the field of electric power transmission, and in particular relates to an economic scheduling method based on a flexible station area. Background technique [0002] With the development of power electronics technology and the wide application of converters, various stations can be interconnected through converters to form a "flexible station". Within the scope of the flexible station area, the power of each station area can be transmitted and controlled through the bus. [0003] At present, due to the gradual increase in the scale of electric vehicles, there are many studies considering the optimal scheduling of electric vehicles. The scheduling is mostly based on the consideration of the user side, and the fluctuation of the load on the grid side is reduced through delayed charging or orderly charging; or the use of V2G Technology, regard electric vehicles as a kind of energy storage, and perform short-term energy feedback to...

AI Technical Summary

Problems solved by technology

However, due to the limitation of application scenarios, these scheduling methods are not completely suitable for the flexible platform environment

At the same time, under the background that fast charging of electric vehicles is becoming more and more popular, when electric vehicles are connected to fast charging stations, they should be treated as a type of load, and the load is relatively heavy.

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