The research progress of solid-state hydrogen storage technology is reviewed, including hydrogen storage materials, hydrogen storage devices and application status. Some hydrogen storage alloys have been successfully used in solid-state hydrogen storage devices. The high-capacity reversible hydrogen storage materials under mild hydrogen absorption and desorption conditions is the focus of current research and development. The optimized design of the hydrogen storage device effectively improves the rapid heat transfer characteristics and the safety performance. Hydrogen storage devices have been applied in the fields of distributed energy supply and motor vehicles. However, it is still necessary to further realize the coordination of rapid response, safety, reliability, and high hydrogen storage density of the hydrogen storage system.

Accurate and reliable anomaly detection is of great significance to ensure the safe and efficient operation of wind turbines. However, due to the complex structure and variable operation conditions of wind turbines, the measure SCADA data usually present complex nonlinear and strongly correlated and coupling characteristics. To better capture spatial correlations among different sensor variables, a new wind turbine anomaly detection approach based on dilated causal convolution network is proposed. Specifically, Focal Loss is introduced to improve the traditional loss function to address the data imbalance issue. The proposed approach can extract effective multiscale spatially correlated features with different receptive field sizes and effectively model the hidden spatial causality among different sensor variables. Furthermore, it can provide an end-to-end anomaly detection solution for wind turbines, which can directly learn useful spatial features from raw SCADA data and build the nonlinear mapping relationship between original data space and condition label space, thus finally outputting the corresponding detection results. A real case study with SCADA data from a wind farm is used to verify the feasibility and effectiveness of the proposed approach.

Based on the performance differences and advantages and disadvantages of four kinds of water electrolysis hydrogen production technologies, the research status of membrane electrode, porous transport layer and bipolar plate in PEM electrolytic cell is summarized and prospected. Finally, combining with the advantages of PEM electrolytic water hydrogen production technology, the cost trend of this technology is analyzed and the application scenarios and development direction of this technology are predicted.

A novel modular floating structure combined artificialreef and wave energy converter （WEC） is proposed, so as to make comprehensive use of marine space, biological resources and renewable energy. Considering the multi-body coupling effect and mechanical coupling effect between the hexagonal floating structure and the floating artificial reef, the coupling time-domain analysis model of the integrated structure system is established based on potential theory. The design parameters of the floating artificial reef and the WEC are preliminary optimized. The dynamic response characteristics and the power output characteristics of the new integrated structure system under typical sea conditions are studied. It is revealed that the outside floating artificial reef can produce considerable energy while reducing the influence of wave load on the inside hexagonal floating structure. In addition, the safety of the integrated structure system under extreme sea conditions is further verified.

In the paper, the present situation of the development of ocean tidal current energy power generation technology and equipment in China is summarized, and compared with the international leading level. Furthermore, our advanced aspects and shortcomings are pointed out. At the same time, the opportunities come from China’s "ocean power" strategy and "carbon peaking and carbon neutrality" strategic objective and the following challenges are analyzed. Moreover, suggestions and opinions on the future development direction of China’s ocean tidal current energy power generation technology and equipment are put forward.