Fast-Speed Power Reserve Control Scheme for Gird-Connected Photovoltaic Systems with Unitary Regression-based Real-Time MPP Estimation

To meet the grid support functionalities in futuristic power electronics-dominated grid, power reserve control (PRC) has been introduced to ensure the inertia emulation capability in grid-connected photovoltaic systems (PVSs). However, conventional PRC methods showed several limitations in approaching the maximum available power (P_avi), such as extra hardware, implementation complexity and sophisticated samples-induced convergence speed degradations. With the proposed fast-speed PRC (FS-PRC) scheme, the P_avi could be estimated using only an independent pair of voltage and current samples via unitary linear regression rather than direct measurement or curve fitting, decoupling the high interaction between the reserve power maintenance and estimation mechanism. In addition, the FS-PRC method offers rapid convergence, high resilience, and enough compatibility with the existing PVSs, without increasing implementation costs. To validate the proposed FS-PRC scheme, comprehensive comparisons under various operating conditions is carried out.