Hybrid energy storage capacity configuration method suitable for wind power grid connection

Abstract

The invention discloses a hybrid energy storage capacity configuration method suitable for wind power grid connection. The method comprises the steps of firstly, decomposing wind power unbalanced power, dividing compensation power of different energy storage equipment, and determining capacity configuration of the different energy storage equipment according to the compensation power; then, introducing a gradient method to optimize the filtering order, comprising the equipment cost of different filtering orders, and selecting the filtering order with the minimum cost as the power and capacitydistribution standard; and finally, establishing an opportunity constraint model according to the fluctuation of the electricity price, and calculating the economic cost of the energy storage equipment by using an improved quantum genetic algorithm on the premise of system stability to obtain the hybrid energy storage capacity configuration which not only meets the requirement of stabilizing windpower instability, but also meets the economic cost. According to the invention, an ensemble empirical mode decomposition method, a gradient method, an improved filtering order optimization control system, an opportunity constraint model and an improved quantum genetic algorithm are combined together, capacity configuration is carried out on the hybrid energy storage system, the instability of wind power can be stabilized, and the effects of peak shaving and valley filling are achieved.

Description

technical field [0001] The invention relates to the technical field of a hybrid energy storage capacity allocation method suitable for wind power grid connection. Background technique [0002] With the intensification of global traditional energy shortage and the vigorous promotion of clean energy policies around the world, under the dual pressures of energy demand and environmental protection, the application of distributed renewable energy such as solar energy and wind energy has attracted more and more attention from all countries. However, a large number of distributed power sources are connected to the distribution network, and the randomness and uncertainty of their output have brought new problems to the safe operation of the distribution network. The new energy represented by wind power is profoundly changing the world's power and energy structure. However, the uncertainty, randomness, intermittency and high penetration of wind power have brought obstacles to the int...

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Problems solved by technology

However, the cost of energy storage systems is relatively high, and how to achieve optimal energy storage capacity allocation under economic conditions has become a research hotspot in recent years.

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