Research On Wind Power Consumption In Combined Electric And Heating System Considering Resources In Source Side And Load Side

With the substantial growth in installed capacity of wind power in recent years,the intermittence volatility and uncertainty of wind power output bring great difficulty topeaking load regulation of power system.In the three north area of our country,because of the rigid constraints of determining power generation by heat of CHP,the unit operation is not flexible and will cause a large number of abandoned wind power.To solve the serious problem of abandoned wind,thermal storage device can realize the co-optimization of two energy systems in combined electric and heating system.This can effectively solve the problem of wind power consumption and resource allocation.The demand response is an important interactive resource within the framework of smart grid and it can flexibly deploy and have a fast response,so it is becoming an important way to absorb wind power.Finally we considered the wind power forecasting error and the response time and response ability of different response resources and proposed a two stage scheduling model of flexible configuration source and load side resource.We verified the validity of the model.In combined electric and heating system,we started from the source side,established the combined electric and heating scheduling model with a thermal power plant contains thermal storage device and analyzed the characteristics of CHP before and after thermal storage was installed.The operation strategy of CHP and thermal storage device and the influence to peaking load regulation under different conditions was studied emphatically.We used MICA to solve the model.A case study showed that the system had a significant increasing in peaking load regulation capacity and had an obvious effect on wind power consumption after thermal storage device was installed in the thermal power plant.But this method did not change the phenomenon that peaking load regulation can only rely on the unit flexible operation.We could do further research by introducing demand response.Secondly,from the perspective of the load side,the demand response was introduced into the combined electric and heating system.According to different load types,the response model of PDR under TOU and the response model based on multi segment bidding curve of IDR were analyzed.Taking PDR as an example,the curves of load and output of all types units were significantly smooth after the introduction of PDR.Demand response participated in peaking load regulation too.At the same time to improve the level of wind power consumption,the running efficiency of the unit was improved.It was also proved that the response capability of PDR was finite.To further improve the consumptive level,it needed to fully dispatch more resource in source side and load side.From the perspective of interacted source and load resources,considering the temporal characteristics of wind power output prediction accuracy and the response time and response capability of the resource in source side and load side,basing on the idea of flexible configuration,integrating characteristics of two stage scheduling,we established a two stage decision scheduling model in the time scale of day before and the day in this paper.We analyzed the influence of PDR on the operation of CHP and thermal storage device and the lifting effect of wind power consumption in the recent scheduling.Then we studied the operation strategy of IDR and all kinds of units and the effect of peak clipping of IDR in intraday scheduling.Finally we verified the practicality of the method.This method not only could consume more wind power,but also had a better economic and environmental benefit relative to the scheduling methods in Chapters ? and ?.This provided a new idea for the study of wind power consumption in combined electric and heating system.