基于超级电容储能与风电机组协同的低惯量电网快速频率响应

The increasing penetration of inverter-based resources in modern power systems has led to a significant reduction in system inertia, creating challenges for maintaining grid frequency stability. To address these issues, a new ancillary service market, termed “Fast Frequency Response (FFR)”, has emerged. FFR mandates rapid power delivery from renewable energy sources,including wind power systems, immediately following contingency events to alleviate frequency drops in a few seconds. This paper presents a control method combining supercapacitor energy storage systems and wind turbine generators to enhance the FFR capabilities of wind power systems and mitigate the frequency drop. This approach ensures the readiness of supercapacitor energy storage systems to provide FFR services under diverse wind conditions. Additionally, a control scheme for the wind turbine generator is developed to optimize its participation in FFR across a range of wind speeds while maintaining a stable operation of the wind power system. The results demonstrate that, while preserving an equivalent investment cost to that of supercapacitor banks, wind power systems can significantly increase their FFR contributions. This improvement effectively addresses critical frequency stability challenges in low-inertia grids. Eventually, the proposed method is validated through real-time experiments on a hardware-in-the-loop (HIL) setup.