Optimizing operation method of energy storage elements of wind storage combined power generation system based on bubble sorting

Abstract

The invention discloses an optimizing operation method of energy storage elements of a wind storage combined power generation system based on bubble sorting. The method comprises the following steps: firstly modeling a conventional machine set to obtain generated output data of the conventional machine set; secondly, simulating timing sequence output data of a wind power plant in combination with an ARMA model and a wind speed- power characteristic curve while considering the fault rate of the draught fan; then obtaining power shortage and overflow wind power of the system at each moment according to the two data and in combination with timing sequence load data; and then determining a preferential discharge sequence according to residual electric energy in the energy storage elements. After the discharge is accomplished, maximized storage of the overflow window power is realized, and finally the reliability indexes of the system are counted by summarizing the calculating data of the conventional machine set, the wind power plant and the energy storage elements. By adoption of the optimizing operation method disclosed by the invention, when the wind power exceeds an allowable access proportion, and the system is still in a power shortage state after absorbing the allowable access wind power, the utilization rate of the wind power can be further improved, and the reliability of the power generation system is improved.

Description

technical field [0001] The invention relates to a method for optimizing the operation of energy storage elements of a wind-storage combined power generation system based on bubble sorting, and belongs to the technical field of wind power control. Background technique [0002] Due to the fluctuation and uncertainty of wind speed, large-scale wind power grid integration brings certain risks to the power system while saving energy and reducing emissions. At present, with the cost reduction of energy storage components and the further improvement of energy storage technology, more and more researchers have devoted themselves to applying energy storage technology to improve the volatility of wind power in recent years. Relevant research has been done on integrating energy storage technology into power generation systems including wind farms and conducting reliability assessments. [0003] Generally, the reliability analysis of power generation systems including wind farms and en...

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Problems solved by technology

[0004] At present, there are related literatures on the operation mode of energy storage elements, that is, energy storage strategies, but the energy storage strategies in most documents are traditional energy storage strategies or full-full discharge strategies, and multiple energy storage elements are often equivalent to one or two large energy storage elements, ignoring failure outages of the elements, and considering fewer cases

A small amount of literature considers the proportion of wind power access and formulates corresponding energy storage strategies, but generally ignores the wind power provided by wind farms exceeding the proportion of wind power access and does not meet the system load, resulting in the loss of this part of electricity

Few literatures consider this part of wind power, but still store this part of wind power according to the original number of the components, and do not optimize the energy storage strategy according to the priority of the remaining power in the energy storage components

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