1.State Key Laboratory of Power System and Generation Equipment (Tsinghua University), Beijing 100084, China;2.State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems (China Electric Power Research Institute), Beijing 100192, China;3.Electric Power Research Institute of State Grid Shandong Electric Power Company, Jinan 250003, China;4.State Grid Shandong Electric Power Company, Jinan 250000, China

With the gradual replacement of synchronous units by renewable energy generation represented by wind and photovoltaic power, the frequency regulation resources of systems are insufficient, and the anti-interference ability is declining, and the frequency security problem is highlighted. The fast frequency support provided by renewable energy stations has become an inevitable requirement for the construction of a new power system. The fast frequency support of renewable energy stations is the result of the coordinated efforts of multiple internal equipment and links, which is influenced and constrained by multiple factors such as wind and solar resources, control strategies, and power grid conditions. Quantitative evaluation of the fast frequency support capability of renewable energy stations is the basis for guiding the optimal control of station frequency regulation, analyzing the frequency response characteristics of the new power system, and realizing the interaction between frequency regulation resources of stations and power grids. This paper provides a comprehensive overview of the evaluation of the fast frequency support capability of renewable energy stations. First, the fast frequency support characteristics of stations are analyzed, and the definition of the fast frequency support capability of stations is given. Then, the evaluation index system of the fast frequency support capability of the stations is sorted out from the three dimensions of state attribute, control characteristic and frequency regulation effect, and the common calculation methods of various evaluation indices are analyzed and commented. Finally, key technical issues worthy of attention and further research are proposed.

This work is supported by National Key R&D Program of China (No. 2021YFB2400500) and State Grid Corporation of China.