计及效率特性的电-氢混合储能直流微网经济下垂控制策略

为实现电-氢混合储能微电网在孤岛状态下的自治经济运行，并降低系统运行对通信网络的依赖，提出一种计及效率特性的直流微网经济下垂控制策略。该控制策略充分考虑电-氢混合储能系统各子系统的工作特性，研究了系统运行与效率的关系，并构建了计及效率特性的电-氢混合储能直流微电网系统成本函数。再结合电-氢混合储能系统的互补工作模式，驱动各系统基于成本分散地实施电-氢混合储能系统的运行方案，进而提高直流微电网的自治经济性能。最后，通过RT-LAB实验平台开展实时仿真。结果表明：所提控制策略相较于传统经济下垂控制，能够实现燃料电池和电解槽高效率区间的稳定运行，验证了效率特性对经济运行的必要性；在一天的运行实验下，其运行成本相较于传统经济下垂控制降低了10.38%，验证了所提出策略的经济性。

Economic droop control strategy of a hybrid electric-hydrogen DC microgrid considering efficiency characteristics

To realize autonomous economic operation of an electric-hydrogen hybrid energy storage microgrid in an island state and reduce the dependence of the system operation on the communication network, this paper proposes a DC microgrid economic droop control strategy that considers efficiency characteristics. It fully considers the operating characteristics of each subsystem of the hybrid electric-hydrogen energy storage system, and studies the relationship between system operation and efficiency. It constructs a cost function of the hybrid electric-hydrogen energy storage DC microgrid system with the efficiency characteristics. In addition, it combines the complementary operation modes of the hybrid system to drive the subsystem to implement the operational scheme of the hybrid electric-hydrogen energy storage system based on cost decentralization, thereby improving the autonomous economic performance of the DC microgrid. Finally, real-time simulation is carried out on the RT-LAB experimental platform. The results show that, compared with traditional economic droop control, the proposed control strategy can achieve stable operation of the system in the high-efficiency range, verifying the neeed for efficiency characteristics; in a one-day operation experiment, its operating cost is reduced by 10.38%, verifying the economics of the proposed strategy.This work is supported by the National Natural Science Foundation of China (No. 52007157).