考虑供热系统建模的综合能源系统最优能流计算方法

Optimal Energy Flow Calculation Method of Integrated Energy System Considering Thermal System Modeling

随着社会经济的发展与技术的进步,综合能源系统已成为未来能源领域变革的重要发展趋势之一,其中以热电联供为代表的电热耦合综合能源系统发展迅速。电热系统的联合优化可以提高燃料利用效率,节省运行成本,但当前电热耦合系统能流研究主要针对于电力系统,对供热系统的管网特性、热负荷与用户温度需求的关联特性考虑得还不够精细,无法充分反映电热系统的实际运行特性。该文基于热力管网支路特性及散热器、换热器等关键设备的稳态模型,考虑供热系统能量传输与管网约束,建立了供热系统稳态能流计算的精细化模型。在此基础上,以热电联供机组电热出力与电锅炉出力为调节变量,提出了一种基于内点法的电热耦合综合能源系统最优能流求解方法,能够更加准确地反映系统运行特性并实现系统经济运行。最后进行算例测试,验证所提最优能流计算方法的可行性与有效性。

With the development of social economy and technology,the integrated energy system has become one of the most important trends for the energy field in the future.Electro-thermal coupled integrated energy system developed rapidly.The joint optimization of electric and thermal systems can improve the fuel utilization and save operation costs.However,the current studies on energy flow for electro-thermal coupling system are mainly for power system.The characteristics of the pipe network and the relevance between heat load and user temperature are not modeled precisely.So it cannot reflect sufficiently actual operation characteristics of electro-thermal coupling system.Based on the characteristics of the heat pipe network branch characteristics and the steady-state models of key equipment such as radiators and heat exchangers,this paper presents a precise steadystate energy flow calculation model of the thermal system,considering the energy supply of the thermal system and network constraints.Moreover,taking the output of combined heat and power units and the output of electric boilers as adjusting variable,an optimal energy flow solution method for the electro-thermal coupling integrated energy system is proposed based on the interior point method.Finally,a case test is conducted to verify the feasibility and effectiveness of the proposed optimal power flow solution method.