A hybrid energy storage capacity determination method for reliable power supply of microgrid system load

Abstract

The invention provides a hybrid energy storage capacity determination method with reliable load power supply of a microgrid system. The hybrid energy storage capacity determination method comprises the following steps of S10, performing statistics on daily capacity and daily load historical power data of a microgrid within one year; S20, counting the power deviation distribution situation of eachsampling period, performing frequency analysis of power deviation, and separating a high-frequency power sequence and a low-frequency power sequence; S30, obtaining the maximum value and the minimum value of the high-frequency power integral sequence and the low-frequency power integral sequence every day through time integral calculation; S40, calculating day-ahead scheduling capacity reference values of the super capacitor and the battery; and S50, performing statistical analysis on the day-ahead scheduling capacity demand data in one year, and obtaining final capacity configuration data ofthe super capacitor and the battery based on probability statistics and a kernel density estimation method. According to the method, the final hybrid energy storage capacity configuration quantity ofthe specific micro-grid is selected by utilizing the confidence interval and the kernel density estimation method, so that the adverse effect on the scheduling of the public power grid due to insufficient micro-grid capacity in a power consumption peak is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of new energy power generation and microgrid dispatching, in particular to a hybrid energy storage capacity determination method for reliable power supply of microgrid system loads. Background technique [0002] Micro-grid (Micro-Grid), also translated as micro-grid, refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices, etc. The proposal of microgrid aims to realize the flexible and efficient application of distributed power, and solve the problem of grid connection of distributed power with a large number and various forms. The development and extension of microgrids can fully promote the large-scale access of distributed power sources and renewable energy, and realize the highly reliable supply of various energy forms for loads. Smart grid transition. [0003] Microgrid...

AI Technical Summary

Problems solved by technology

However, there are various energy storage technologies with different characteristics, and the differences lead to application problems in different occasions.

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