Capacity planning method in view of energy storage suppression fluctuation power of economic power grid dispatching

Abstract

The invention discloses a capacity planning method in view of energy storage suppression fluctuation power of economic power grid dispatching. The method comprises: establishing a mathematic model by taking a minimum grid-connection power target value offset variance as an optimization target, and on the basis of the established mathematic model, establishing a capacity planning model by taking minimum operation and construction costs of an energy storage power station as targets; and performing solution computation on a capacity optimization target function corresponding to a capacity planning model of a mixed energy storage power station, and determining an optimal capacity value of the mixed energy storage power station. According to the method, the mathematic model is established by taking the minimum grid-connection power target value offset variance as the optimization target, wherein the target value is defined as a stepped curve, so that periodic constant power output of wind power is realized and the dispatchability is improved; and at the same time, the power offset variance in the model is minimal, so that the sum of stored and released energy of an energy storage system can be reduced and the energy storage capacity demand is lowered.

Description

technical field [0001] The invention relates to a capacity planning method for energy storage to stabilize fluctuating power in consideration of power grid economic dispatch. Background technique [0002] As the penetration rate of renewable energy increases, its volatility poses a huge challenge to the safe and reliable operation of the power grid. Due to its characteristics of charging and discharging energy, energy storage power stations become an important way to smooth the power of renewable energy and overcome its volatility. One of the key problems in configuring energy storage in wind farms is how to coordinate and determine the energy storage capacity in the face of the constraint relationship between smoothing effect and input cost, so that the limited capacity can meet the effectiveness and economy of energy storage system operation at the same time. It can be seen that the capacity optimization of the energy storage power station is an important content of the e...

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Problems solved by technology

[0005] 1. This patent does not consider the calculation of the stabilization target value of economic dispatch, and does not consider the impact of the grid-connected power target value offset on the entire model;

[0006] 2. The optimal grid-connected power target value output curve has not been established

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