Wind Power Absorption Strategy And Optimal Dispatching Based On Wind Power And Heat Storage Heating System

China is rich in wind energy resources,which is very suitable for the development of wind power industry.At present,the total installed capacity of wind power in China ranks first in the world steadily,however,due to the randomness and fluctuation of wind power output,the growth rate of wind power grid-connected power is lower than that of installed capacity,which leads to relatively high abandoned wind power and affects the orderly development of wind power.Considering that the area where wind power is concentrated in China belongs to heating area in winter,heat generation heating can coincide with wind power absorption.In this context,the study of wind power absorption strategy based on wind power heating has important theoretical and practical significance.Firstly,according to the characteristics of wind speed variation and time series,an ARMA autoregressive moving average model is established to predict wind speed.Through the relationship between the output power of a single wind turbine and the input wind speed,the prediction model of wind power is obtained.Considering that there are some errors in wind power forecasting,the error interval is used to describe the deviation of wind power forecasting.A set of equal interval wind power curves are discretized in the error interval.Combining with the probability of occurrence of each curve,a curve with minimum error is found as the wind power forecasting curve.The example shows that the wind power forecasting method is feasible and can be used as a basis for future research.Secondly,considering that the heat load is mainly related to temperature,a simplified heat load model with temperature as a variable is established.By comparing the heat sources of the wind power heating system,the regenerative electric boilers are chosen for heating,and the central heating mode is chosen.Considering that the heating demand can not be met under extreme conditions,a method of intermittent heating based on building classification is proposed.The results of calculation show that the measure can reduce the heat load in a short time to cope with the shortage of heating.Finally,this paper chooses the strategy of complete wind power absorption to make full use of wind power resources.Taking wind farm and heating system as a whole,the heating system purchases electricity from the grid to increase heat storage during the low load period,thereby increasing the power load.Using heat storage to meet heating demand during peak load period,and generating revenue from selling wind power to power grid.An optimal dispatching model aiming at maximizing the daily profit of wind power heating system is established.The results of an example show that the strategy of complete wind power absorption can absorb 100% of wind power,and the wind power heating system can achieve better benefits.In addition,the wind power heating system suppresses the peak-valley difference of the grid by storing and releasing heat,and contributes to the "peak-cutting and valley-filling" of the grid.