Energy storage scheduling method for large power grid with high penetration rate of wind power

Abstract

The invention discloses an energy storage scheduling method for a large power grid with high penetration rate of wind power. First, a corresponding wind power prediction risk analysis is made according to historical wind power prediction error and wind power prediction data, the credible capacity of wind power is obtained, and the load and the settlement electricity price are predicted. Then, according to the operation mode and parameter requirement of the electric power market, an appropriate two-level energy storage device is selected and used, and a corresponding two-level energy storage scheduling strategy is designed, to complete the scheduling of the grid connection power of a wind farm, the charge and discharge of an energy storage system and the grid-connection power of a thermal power plant. Therefore, the balance of supply and demand of the power system is reliably guaranteed, and the stability of the power grid is maintained.

Description

technical field [0001] The invention belongs to the technical field of power grid energy storage dispatching, and more specifically relates to a method for large power grid energy storage dispatching with high wind power penetration rate. Background technique [0002] With the depletion of fossil energy, many countries have increased the research and application of new energy in recent years, hoping to alleviate the problem of energy shortage through new energy power generation, such as wind power generation, photovoltaic power generation, etc. The benefits brought by the use of new energy power generation not only alleviate the crisis of fossil fuels, but also provide new ideas for energy production and transmission. On the other hand, they also solve the problems caused by dependence on fossil energy. environmental pollution and reduce carbon emissions. However, new energy power generation technology has some adverse effects on the safe and stable operation of the power s...

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Problems solved by technology

[0006] Literature "Yu Peng, Zhao Yu, Zhou Wei, Sun Hui, etc. Research on the Method of Smoothing Wind Power Fluctuation Power Based on Hybrid Energy Storage System. Power System Protection and Control, Vol.39(24), 2011, pp.35-40 "Based on a new type of hybrid energy storage system composed of batteries and supercapacitors, a method of stabilizing wind power fluctuation power based on hybrid energy storage system is proposed, but the influence of load is not considered, and the only objective function is to stabilize power fluctuations. Guarantee the reliability of power supply, and it is not combined with the background of the electricity market, and the economic benefits are not obvious

In the literature "Liu. Meng, L. Franklin, Lee Wei-Jen. Dispatch Scheduling for a Wind Farm With Hybrid Energy Storage Based on Wind and LMP Forecasting. IEEE Transaction on Industry Applications, Vol.51, 2015, pp.1970–1976." In this paper, although the operation background of the electricity market is combined, and the node marginal electricity price is used as the judgment condition of the energy storage strategy, it only considers the unilateral factors of the wind farm, ignores the influence of the load, and does not consider the balance of supply and demand, which is to a certain extent affect the stability of the power system

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