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

A wind power consumption and power system technology, applied in wind power generation, instruments, data processing applications, etc., can solve problems such as underutilization of energy storage systems, restricted applications, and insufficient large-capacity space for energy storage

Active Publication Date: 2017-06-20
STATE GRID SHANDONG ELECTRIC POWER +1
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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 po...

Method used

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

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Embodiment 1

[0078] A method for improving the ability of a power system to accommodate wind power by using power-to-air energy storage technology based on controlling translational loads, comprising the following steps:

[0079] Step 1: Perform day-ahead wind power output forecast and load forecast: decompose wind power in the frequency domain to obtain three parts: daily cycle, low frequency and high frequency. The regularity of the daily cycle part is very obvious, and the system is fitted by combining the advantage of the BP neural network being sensitive to the law. In the present invention, a single hidden layer neural network is adopted, the neuron transfer function of the middle layer of the network adopts an S-type tangent transfer function, and the output layer neuron transfer function adopts an S-type logarithmic transfer function. The low frequency part obtained after frequency domain decomposition is a section of very smooth curve. In the present invention, the prediction meth...

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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....

Claims

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Application Information

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IPC IPC(8): H02J3/46G06Q50/06
CPCG06Q50/06H02J3/46Y02E10/76
Inventor 荆树志聂萌王洋徐珂朱晓荣韩丹慧
Owner STATE GRID SHANDONG ELECTRIC POWER
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