考虑火电调峰主动性与需求响应的含储能电力系统优化调度

Optimal Dispatch of Power System with Energy Storage Considering Deep Peak Regulation Initiative of Thermal Power and Demand Response

风电等可再生能源大规模并网,对电力系统调峰能力提出了更高要求。分别从源、荷、储3方面挖掘系统的调峰能力:首先,在负荷侧利用价格型需求响应引导用户主动参与负荷调整,降低系统峰谷差;然后,在考虑火电机组调峰成本与调峰补偿的基础上,加入火电机组调峰主动性约束,该方法利用经济手段提高了火电机组主动调峰的意愿,为风电上网挤出空间;其次,在火电厂侧配置储能设备辅助调峰火电机组共同参与到系统的调峰辅助服务中,相当于增加了火电机组调峰深度;最后,以系统经济性最优和弃风率最小为目标函数,构建了考虑火电深度调峰主动性与需求响应的含储能电力系统优化调度模型,并给出算例分析,验证所提模型提升了系统调峰能力以及促进了系统对风电消纳。

The large-scale grid connection of renewable energy such as wind power poses higher requirements for the peak capacity of a power system.Therefore,the peaking ability of the system is explored from three aspects,namely,source side,load side,and storage.Firstly,on the load side,price-based demand response is used to guide users to actively participate in the load adjustment so as to reduce the peak-valley difference of the system.Then,after taking into account the peak shaving cost of thermal power units and peak shaving compensation,the initiative peak shaving constraint of thermal power generating unit is added.In this method,an economic means is used to increase the will that the thermal power unit actively participates in peak shaving so as to make room for connecting wind power.Secondly,the energy storage equipment on the power plant side is configured and integrated into the peaking auxiliary service of the system with the peaking thermal power unit,which is equivalent to increasing the peak shaving depth of the thermal power unit.Finally,by taking the optimal system economy and the minimum wind curtailment rate as the objective function,an optimal scheduling model of power system with energy storage in which the deep peak shaving initiative of thermal power and demand response are taken into consideration is constructed.Furthermore,the example analysis is given to verify that the model proposed in this paper can improve the peaking ability of the system and promote the system’s consumption of wind power.