A method for smoothing output of joint power generation of wind power system and energy storage system

Abstract

The present invention provides a method for smoothing joint power generation of a wind power system and an energy storage system, comprising: obtaining a data set composed of power prediction values ​​of the wind power system; using a polynomial fitting algorithm to fit the data set to obtain a smooth joint power generation Output formula; calculate the smoothed output value of the combined power generation according to the smoothed power output formula of the combined power generation; determine the energy storage system according to the relationship between the smoothed output value of the combined power generation and the predicted power value of the wind power system and the absolute value of the difference The output mode and power output value. The present invention uses a polynomial fitting method to determine the output value of smooth wind power fluctuations, taking into account the entire planned output range, making the optimized output value more moderate, and reducing the inertia time of the first-order low-pass filtering method. Compared with the prior art, The embodiment of the present invention has a more optimized smooth output effect.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for smoothing output of joint power generation of a wind power system and an energy storage system. Background technique [0002] Wind energy resources are a clean and renewable energy source, but there are problems of randomness and volatility, which bring a series of impacts to the power grid. The degree of power fluctuation directly affects the original power flow distribution of the power grid. When the penetration rate of wind power is at a high level, the volatility and randomness will have a huge impact on the original operation mode of the power grid. In order to reduce this impact, large-scale energy storage systems can be configured in wind farms for joint operation, so as to achieve smooth power output from wind farms. figure 1 It is a schematic diagram of wind power generation and large-scale energy storage joint power generation system. Multiple win...

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the embodiments of the present invention is to provide a method for smoothing the joint power generation of a wind power system and an energy storage system, so as to solve the delay phenomenon in the smooth output curve obtained by using a first-order low-pass filter algorithm to stabilize wind power fluctuations in the prior art question

Images