Hybrid energy storage capacity optimization configuration method in grid connected wind-solar generation
A capacity-optimized configuration and hybrid energy storage technology, which is applied in energy storage, AC network load balancing, forecasting, etc., can solve problems such as high energy storage costs, unstable power generation of wind and solar power, and inability to dispatch flexibly
Active Publication Date: 2016-10-26
NANJING INST OF TECH
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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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[0048] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0049] The hybrid energy storage capacity optimal allocation method in the grid-connected wind power generation of the present invention, such as figure 1 shown, including the following steps:
[0050] Step 1: Determine the energy management strategy;
[0051] Step 2: Calculate the operating indicators of the grid-connected wind power generation system;
[0052] Step 3: The objective function is to minimize the average annual cost of the hybrid energy storage device;
[0053] Step 4: Determine the constraints;
[0054] Step 5: Use the improved chaos optimization algorithm to solve the optimal configuration model.
[0055] The specific implementation process is as follows:
[0056] The ener...
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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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IPC IPC(8): H02J3/28H02J3/32G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06H02J3/28H02J3/32Y02E40/70Y02E70/30Y04S10/50
Inventor 杨志超陆文伟葛乐马寿虎陆文涛顾佳易王蒙
Owner NANJING INST OF TECH
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