Abstract: Compared to grid connected grid source load storage systems, off grid green hydrogen production grid source load storage systems have lower grid connection costs, lower energy prices, and more flexible and coordinated operation of power load "wall transmission". However, the security and stability issues of off grid systems are prominent, and balancing the relationship between system security, stability, and economic operation is an important problem that they must face. Based on this, the risks and technical bottlenecks of the off grid green electricity hydrogen production network source load storage system were summarized and analyzed. The construction plan of the off grid network source load storage system under AC and DC networking modes was discussed, and the required equipment, application scenarios, and existing problems were analyzed. Taking the green electricity hydrogen production chemical park in reality as an example, the dynamic reactive power compensation device was simulated to explore its functional characteristics and laws, providing technical analysis and suggestions for the development of off grid source load storage systems, especially the overall construction plan of the system in the synthetic green hydrogen scenario.