Capacity allocation method of multi-wind power plant energy storage device for dealing with wind power fluctuation

Abstract

The invention provides a capacity allocation method of a multi-wind power plant energy storage device for dealing with wind power fluctuation. The method includes the steps that firstly, a minimum energy storage power demand optimization model is established with the minimum energy storage power demand of all nodes of an electric system as a target; secondly, according to the minimum energy storage power demand optimization model, a wind power plant energy storage minimum capacity value within the largest wind power fluctuation range is acquired in combination with a robust linear optimization method; thirdly, when the minimum capacity value is zero, the energy storage device does not need to be arranged; when the minimum capacity value is not zero, the energy storage device is arranged at a non-zero node according to the wind power plant energy storage minimum capacity value. According to the device, layout of multiple wind power plants in the electric system and a network topology structure connected into the system are taken into consideration, and the objective fact that the multiple wind power plants are connected into the current electric system can be reflected; with the introduced robust linear optimization method on the basis of distribution information of random variables, power fluctuation of the multiple wind power plants can be taken into consideration at the same time, and a stochastic programming model difficult to solve is converted into a deterministic linear programming model.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and more specifically relates to a method for capacity allocation of multi-wind farm energy storage devices to cope with wind power fluctuations. Background technique [0002] Energy storage technology can achieve the technical role of active stabilization and power balance in traditional power systems, but with the development and grid connection of large-scale wind power, the new power system with multiple wind farms presents stronger randomness and volatility . In order to ensure the safe operation of the power grid, an energy storage device with a certain capacity is configured for the wind farms in the power grid with multiple wind farms, which can effectively weaken the adverse effects of short-term / long-term wind farm output fluctuations on the system operation, and even in a certain Change the uncontrollability of wind farm output to a certain extent. [0003] In the text ...

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Problems solved by technology

However, this invention cannot be extended to the energy storage configuration research of multiple wind farms

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