Energy storage capacity optimal configuration method of wind storage combined frequency modulation system and computing equipment

Abstract

The invention discloses an energy storage capacity optimization configuration method of a wind storage combined frequency modulation system, the wind storage combined frequency modulation system realizes frequency modulation through an energy storage device and a fan standby, the method is executed in a computing device. The method comprises the following steps: obtaining operation parameters of the wind storage combined frequency modulation system; according to the operation parameters, a wind storage combined optimization model is established, the model comprises an objective function and constraint conditions, the objective function is used for calculating the operation cost and the frequency modulation effect of the wind storage combined frequency modulation system, and the optimization objective of the optimization model is to minimize the value of the objective function; calculating an optimal solution of the optimization model to determine an energy storage configuration proportion; and configuring the capacity of the energy storage device and the standby number of the fans in the wind storage combined frequency modulation system according to the energy storage configurationproportion. The invention also discloses a corresponding computing device.

Description

technical field [0001] The invention relates to the technical field of power system frequency modulation, in particular to an energy storage capacity optimization configuration method and computing equipment of a combined wind-storage frequency modulation system. Background technique [0002] With the gradual depletion of traditional energy sources and the increasingly serious environmental pollution, renewable energy grid-connected power generation has become an important means to overcome the energy crisis. By 2050, the proportion of my country's new energy installed capacity will rise from the current 20% to 60% to 70%. As a widely used new energy source, wind power accounts for an increasing proportion of my country's installed capacity. However, the frequency regulation task of the power system is mainly undertaken by the hydropower unit and the medium-temperature and medium-voltage thermal power unit. The wind turbine usually operates in the maximum power point tracki...

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Problems solved by technology

[0003] Existing energy storage frequency regulation schemes mostly focus on energy storage capacity allocation, without considering the reserved backup method and optimal number of wind turbines, and have not realized the joint optimization of wind power output and energy storage capacity allocation

In fact, if there are few wind turbines in reserve, the power and capacity of the energy storage configuration will inevitably be increased, which will increase the cost of investment and operation and maintenance; at the same time, because the supporting power curve is peak-shaped, the energy storage will only bear high costs in a short period of time. The frequency modulation power will then enter the steady-state power support stage, and the support power is small, so it is unnecessary to configure too much energy storage; and if there are too many wind turbines in reserve, the wind turbines will derate for a long time to generate power, which will cause a large loss of wind curtailment, which is economical. poor sex

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