基于电—氢混合储能的风氢耦合系统建模与控制

为改善高比例联网风电的反调峰、不可控等冲击电网的不利特性，提出了一种基于电—氢混合储能的风氢耦合系统控制策略。建立直驱永磁风电机组、电解槽、燃料电池及超级电容器数学模型，研究耦合在直流母线的电解槽、燃料电池、超级电容器与直驱永磁风电机组之间的量化关系，设计风氢耦合系统的上层控制策略，并进行分析与研究。PSCAD/EMTDC中的仿真结果表明:通过超级电容器、电解槽与燃料电池的协调配合，超级电容器完全可以弥补电解槽与燃料电池响应延迟功率，同时实现风氢耦合系统出力可控、功率外特性友好，有效验证了本文所建立各设备数学模型的准确性及设计控制策略的有效性。

Modeling and Control of Wind-Hydrogen Coupling System Based on Electricity-Hydrogen Hybrid Energy Storage

In order to improve the anti-peak shaving and uncontrollable characteristics of high-scale wind power connected to power grid， this paper proposes a control strategy for wind-hydrogen coupling system based on electricity-hydrogen hybrid energy storage. The mathematical models of permanent magnet synchronous generator (PMSG), electrolyzer (EL), fuel cell (FC) and supercapacitors (SC) are established, and the relationship between the PMSG and other devices including EL, FC and SC linked in DC bus is studied. Simultaneously， the upper control strategy for the wind-hydrogen coupled system is designed. The simulation results in PSCAD/EMTDC show that: (1)SC can fully compensate the response delay power of EL and FC by way of the coordination of SC，EL and FC， which make the output power of the wind-hydrogen coupling system controllable and friendly;(2) The mathematical model of each device is of high accuracy; (3) And the control strategy is effective.