Capacity allocation method for hybrid energy storage system capable of restraining wind power output power fluctuation

Abstract

The invention discloses a capacity allocation method for a hybrid energy storage system capable of restraining wind power output power fluctuation. The wind power fluctuation component is extracted based on the national wind power integration standard by means of the improved moving average method, fluctuating power is allocated by means of the variable-filter time constant high-pass filtering method based on the charging states of energy storage equipment, in this way, over-charging and over-discharging of energy storage equipment can be avoided, and finally a capacity allocation model is established with the full-life circle economical efficiency optimization of energy storage equipment as an objective function. Compared with a traditional method according to which only one-time primary investment is considered, the method better accords with the actual condition of long-term operation of an energy storage system and has guiding significance for practical engineering construction.

Description

technical field [0001] The invention belongs to the technical field of microgrid energy storage, and relates to a hybrid energy storage system capacity configuration method, in particular to a hybrid energy storage system capacity optimization configuration method for smoothing wind power output power fluctuations. Background technique [0002] The wind power technology with the characteristics of green, clean and renewable has been widely used and developed all over the world, and its installed capacity is increasing year by year. It is an effective way to solve the energy crisis and environmental pollution problems in the world today. However, the output power of the wind power generation system is affected by external factors such as natural conditions, which is intermittent and random. Large-scale wind power grid integration will have a negative impact on the stable and reliable operation of the large power grid and power quality, so it is necessary to configure a certain...

AI Technical Summary

Problems solved by technology

[0005] For the technical difficulty (1), the traditional method is mainly based on the low-pass filtering method, which is likely to cause too large a smoothing component, resulting in an excessively large energy storage system capacity configuration, poor economy, and cannot effectively combine the relevant national wind power grid-connected standards;

[0006] For the technical difficulty (2), the traditional method cannot take into account the state of charge of the energy storage device, which may cause overcharging and over-discharging of the energy storage device during the distribution process;

[0007] For the technical difficulty (3), the traditional method has certain deficiencies in the establishment of optimization objectives and determination of constraints

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