考虑异质能流输运特性的多能源系统惯量极限优化

Inertia Limit Optimization of Multi-energy System Considering the Transport Characteristics of Heterogeneous Energy Flow

针对多能源系统中异质能流输运特性、时间尺度、能量品质差异较大,易导致系统突破安稳运行边界的问题,该文提出基于异质能流输运协调的多能源系统惯量极限优化模型。首先,研究各能源子系统受惯性影响的安稳指标与能量平衡关系的多能源系统惯性特征,并建立多能源系统惯量支撑可调节能力量化模型。然后,基于多能源系统惯量极限需求特性,建立多能源系统惯量充裕度判别模型。在此基础上,建立基于多能源系统各子系统稳定性能要求的多能源系统惯量需求极限优化模型,并提出基于交替方向乘子法进行多能源系统的惯量极限求解方法。最后,基于改进的IEEE 39节点电力系统、20节点热力系统和14节点天然气系统进行仿真分析。仿真结果表明,该文提出的基于异质能流输运协调的多能源系统惯量极限优化模型能够有效提高多能源系统惯量资源利用效率和惯量支撑经济性。

In view of the differences in the transport characteristics,time scales,and energy quality of the heterogeneous energy flow in the multi-energy system,which may easily lead to the system breaking the stable operation boundary,this paper proposed a multi-energy system inertia limit optimization model based on the coordination of heterogeneous energy flow transportation.The inertial characteristics of the multi-energy system of the relationship between the stability index and the energy balance of each energy subsystem affected by inertia were studied.The quantitative model of the inertia support adjustable capacity for the multi-energy system was established.Then,the characteristics of the inertia limit demand of the multi-energy system were analyzed,and the inertia sufficiency judgment model of the multi-energy system was established.On this basis,a multi-energy system inertia limit optimization model based on the stable performance requirements of each subsystem of the multi-energy system was established,and a method for solving the inertia limit of the multi-energy system based on the alternating direction multiplier method was proposed.Finally,simulation analysis was carried out based on the modified IEEE 39-node power system,20-node thermal system,and 14-node natural gas system.The simulation results show that the multi-energy system inertia limit optimization model based on the coordination of heterogeneous energy flow transportation can effectively improve the inertia resource utilization efficiency and inertia support economy of the multi-energy system.