Method for improving wind power absorption ability of electric power system through electricity-to-gas energy storage technology

Abstract

The invention discloses a method for improving wind power absorption ability of an electric power system through electricity-to-gas energy storage technology. The method comprises steps of predicting system load at the t period before the day and wind power output at the t period before the day; by taking the principle that the wind power obtained through the prediction is absorbed in a minimal wind abandon mode by the system, setting a calling scheme I for optimizing the wind power absorption ability; and judging whether to translate load participation, solve translatable load, require an electricity-to-gas energy storage device to work and start an electricity-gas energy storage. According to the invention, parts of wind and electricity can be absorbed through the electricity-to-gas device when the wind power output is too big; impacts on the electric power system are reduced; obtained man-made natural gas can be directly stored and transported in a natural gas system; requirements on energy storage cells are reduced; and energy storage cost is reduced. On the other hand, the natural gas can provide a part of heat load, so pressure of a thermal power plant is reduced.

Description

technical field [0001] The invention relates to a method for improving the ability of a power system to accommodate wind power, in particular to a method for improving the ability of a power system to accommodate wind power through power-to-gas energy storage technology, and belongs to the technical field of new energy. Background technique [0002] Large-scale wind power grid connection is one of the main forms of developing new energy and an important part of my country's new energy development strategy. With the rapid growth of my country's wind power installed capacity, the problem of large-scale wind power grid-connected consumption is becoming more and more prominent. The randomness and volatility of wind power itself make the power output of wind farms very random. Under the condition that the wind speed prediction does not achieve sufficient accuracy, the hourly wind power changes and prediction errors mean that it will cause great damage to the power system. shock....

AI Technical Summary

Problems solved by technology

[0005] At present, the high cost of the energy storage system restricts its application, and taking the minimum cost as the objective function may cause the problem of too much air curtailment

Moreover, the energy storage capacity is limited. When the wind power fluctuates in a large range, the energy storage capacity space is not large enough. In addition, in the season when the wind power output is small, the energy storage capacity allocation may be excessive, and the energy storage system cannot be fully utilized.

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