考虑REGS和可调热电比的综合能源系统优化调度

Optimal dispatch of integrated energy system considering REGS and adjustable thermoelectric ratio

在“双碳”目标背景下,针对热电联产机组“以热定电”模式导致的弃风问题,文章提出了一种考虑可再生增强型地热系统(Regenerative Enhanced Geothermal System,REGS)和可调热电比的综合能源系统(Integrated Energy System,IES)优化调度模型。首先,构建干热岩提取循环等模型,分析了能量分配系数对于REGS作为源端的热电可调节机理;其次,研究了REGS配合光热电站和热电联产机组耦合运行机制,分析了耦合运行改善热电比的机理,并引入广义机组热电比控制模型;再次,以购能成本、运行成本、运维成本、弃风成本及碳税成本之和最小构建目标函数进行优化求解;最后,利用西北某地区实际数据进行算例分析,验证了所提模型能够提高系统经济性和风电消纳率,减少碳排放。

In the context of the"double carbon"target,a comprehensive energy system optimization and scheduling model considering RECS and adjustable thermoelectric ratio is proposed to address the abandonment problem caused by the"heat-determined"mode of CHP units.Firstly,we construct a model such as dry heat rock extraction cycle,and analyze the energy allocation coefficient for RECS as the source of thermoelectric adjustable mechanism;secondly,we study the coupling operation mechanism of REGS with solar thermal power plant and cogeneration unit,analyze the mechanism of coupling operation to improve thermoelectric ratio,and introduce a generalized unit thermoelectric ratio control model;thirdly,we construct an objective function with the sum of energy purchase cost,operation cost,operation and maintenance cost,wind abandonment cost and carbon tax cost;finally,the proposed model i verified to improve the system economy and wind power consumption rate and reduce carbon emission by using the actual data of a region in Northwest China.