Hybrid energy storage capacity optimization configuration method in grid connected wind-solar generation

Abstract

The present invention discloses a hybrid energy storage capacity optimization configuration method in grid connected wind-solar generation. The energy management strategy is determined that storage battery work state optimization is taken as a principle and improving the system integration economical efficiency is taken as a target, based on the energy management strategy, the calculating flow of the energy loss rate and the energy deletion rate of the grid connected wind-solar generation system is analyzed, according to a total life-cycle cost theory, an annual average cost function expression of the energy storage device is built, and an energy storage capacity optimization configuration model taking the minimum function value as the target and taking the operation indexes such as the energy loss rate and the energy deletion as a constraint is built, and finally the optimization configuration model is solved by employing an improved chaotic optimization algorithm. The improved chaotic optimization algorithm employs the chaotic motion with ergodicity, randomness and regularity so as to effectively complete the calculation of the complex non-linear optimization configuration model.

Description

technical field [0001] The invention relates to a hybrid energy storage capacity optimization configuration method in grid-connected wind power generation, and belongs to the technical field of configuration optimization of micro-grid energy storage systems. Background technique [0002] With the rapid expansion of wind power generation scale, grid-connected wind power generation system will become a development direction with great application prospects. However, the instability and intermittency of wind and wind power generation make it unable to meet the scheduling flexibility required by the grid like traditional power generation methods. To solve this problem, it is necessary to develop and build a matching energy storage system. [0003] The application of energy storage technology to the wind power generation system will make the energy management of the system more flexible. However, for wind power storage projects that use batteries as common energy storage componen...

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Problems solved by technology

However, the instability and intermittency of wind power generation makes it unable to meet the scheduling flexibility required by the grid like traditional power generation methods. To solve this problem, it is necessary to develop and build a matching energy storage system

[0003] The application of energy storage technology to wind and wind power generation systems will make the energy management of the system more flexible. However, for current wind and wind storage projects that use batteries as common energy storage components, the cost of energy storage is close to or even greater than that of purchasing separate photovoltaic power generation components or wind turbines. cost

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