考虑风电消纳的电热联合系统优化调度模型  

Optimization Dispatching Model of the Combined Heat and Power System Considering Wind Power Integration

作　　者：徐小圣 徐昌睿 李梦诗[1] 季天瑶 XU Xiaosheng;XU Changrui;LI Mengshi;JI Tianyao(School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学电力学院,广州510640

出　　处：《南方电网技术》2024年第11期106-118,共13页Southern Power System Technology

基　　金：国家自然科学基金重点项目(51437006)。

摘　　要：电热联合系统能够有效整合电能和热能,具有显著的能源利用优势。为了分析电热联合调度的经济节能效果,在分时电价以及负荷波动的条件下,建立了包含风电场、能源集线器(energy hub,EH)、热泵和蓄热罐的电热联合系统优化调度模型。电热联合系统以日运行成本最小为目标,考虑了稳态电热联合潮流、储能设备动态特性、管道温度降方程等实际约束条件。为提高优化效率,采用方程线性化和分段McCormick凸包络技术处理约束中的非线性项,将原本的非凸优化问题转化为混合整数二次规划(mixed integer quadratic programming,MIQP)问题求解。通过算例分析验证了所提模型的有效性,在4种场景下比较了风电制热以及热网传输损耗对系统日运行成本和弃风量的影响,并确定了风电场接入热网的最佳节点。结果表明,电热联合系统能够将不稳定的风能转化为稳定的热能,从而有效提升风电消纳空间和系统经济效益。The combined heat and power system effectively integrates electricity and heat energy,providing significant advantages in energy utilization.To analyze the economic and energy-saving effects of combined heat and power dispatch,an optimization dispatch model is developed considering time-of-use electricity prices and load fluctuations,which includes wind farm,energy hub,heat pump,and heat storage tank.The optimization objective is to minimize daily operating costs while considering practical constraints such as steady-state combined electrical and thermal power flow,dynamic characteristics of energy storage device,and pipe temperature drop equations.To enhance optimization efficiency,equation linearization and piecewise McCormick convex envelope technique are utilized,transforming the original non-convex optimization problem into a mixed integer quadratic programming(MIQP)problem.The proposed model's validity is verified through case studies,comparing the impact of wind-to-heat conversion and heat transfer loss on daily operating costs and wind curtailment in four scenarios.The optimal connection node for integrating the wind farm into the heating network was also identified.The results demonstrate the system's capability to convert unstable wind energy into stable heat energy,thereby enhancing wind energy integration capacity and improving overall economic performance.

关 键 词：电热联合调度 混合整数二次规划 风电消纳 能源集线器 储能设备 

分 类 号：TM73[电气工程—电力系统及自动化]