Site selection constant volume joint optimization method of wind storage system of wind power plant group

Abstract

The invention relates to a site selection constant volume joint optimization method of a wind storage system of a wind power plant group. According to the method, position setting of a central transformer substation is taken into consideration; high-voltage and low-voltage side power transmission capacity of the central transformer substation of the wind power plant group and the power configuration of an energy storage system are optimized; by performing comprehensive consideration on power grid power transmission benefit, the construction cost of the high-voltage and low-voltage side power transmission project of the central transformer substation, the energy storage power configuration cost and the possible blocking-caused wind curtailment loss, an optimization model capable of reflecting the maximum social benefit of a wind storage joint system is established so as to obtain the position of the central transformer substation, the high-voltage and low-voltage side power transmissioncapacity and the energy storage power configuration. By virtue of implementation of the method, an external transmission power transmission project of the wind power plant group can be reasonably planned, and wind resource can be fully utilized to improve the social benefit of the wind power planning project.

Description

technical field [0001] The invention relates to the field of power grid planning, in particular to a combined optimization method for site selection and capacity determination of wind farm group wind storage systems. Background technique [0002] my country's wind resources are far away from the load center, and most of the wind farms are at the end of the power grid. Wind power cannot be consumed locally. It is necessary to build supporting long-distance transmission lines to transport electric energy to the load center. The output power of wind power fluctuates greatly and the energy density is low. In order to optimize wind power transmission, rationally utilize power transmission projects, and reduce line losses, the output of each wind farm is first converged to the central substation, and then boosted and sent out by the central substation. The location of the central substation directly affects the length of the transmission line from each wind farm to the central sub...

AI Technical Summary

Problems solved by technology

[0003] In the existing studies, either the location of the central substation is fixed, and an optimization model of combined wind-storage transmission is constructed from an economic point of view, or the influence of the location of the central substation on the optimization of the transmission line capacity on the high and low voltage side is considered, and the impact of energy storage capacity configuration on the transmission line capacity is not considered. The Influence of Wind Storage Combined Delivery System on Economy

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