To address the dynamic operational constraints limiting frequency modulation capabilities in super-large wind turbines
this study proposes a Dynamic Frequency Modulation Potential Coefficient-based Adaptive Virtual Inertia Control (FPC-AVIC).Using the IEA 15 MW direct-drive wind turbine as a case study
we establish a quantitative evaluation framework for rotor kinetic energy's frequency regulation capacity while elucidating the dynamic coupling mechanism between rotor kinetic energy and converter capacity.Through the introduction of a dynamic frequency modulation potential coefficient
the real-time boundary of frequency modulation capability is systematically quantified
enabling the development of an adaptive control framework that dynamically adjusts frequency regulation contribution intensity. Additionally
an exponential speed recovery strategy is formulated to mitigate power transients during the speed restoration phase. Simulation results demonstrate that compared with PD virtual inertia control
the proposed FPC-AVIC elevates the secondary frequency dip nadir from 49.50 Hz to 49.64 Hz.When integrated with the exponential recovery strategy
the system achieves smooth power/speed transitions and eliminates observable secondary frequency drops during grid recovery processes.
关键词
Keywords
references
CHEN Y H, LIN H Y.Overview of the development of offshore wind power generation in China[J]. Sustainable energy technologies and assessments, 2022, 53: 102766.
MORREN J, PIERIK J, DE HAAN S W H. Inertial response of variable speed wind turbines[J]. Electric power systems research, 2006, 76(11): 980-987.
SUN M, MIN Y, CHEN L, et al.Optimal auxiliary frequency control of wind turbine generators and coordination with synchronous generators[J]. CSEE journal of power and energy systems, 2021, 7(1): 78-85.
WANG S Q, TOMSOVIC K.Fast frequency support from wind turbine generators with auxiliary dynamic demand control[J]. IEEE transactions on power systems, 2019, 34(5): 3340-3348.
LIU K C, QU Y B, KIM H M, et al.Avoiding frequency second dip in power unreserved control during wind power rotational speed recovery[J]. IEEE transactions on power systems, 2018, 33(3): 3097-3106.
GUO L, REN Y F, WANG Z G, et al.Double-layer feedback control method for synchronized frequency regulation of PMSG-based wind farm[J]. IEEE transactions on sustainable energy, 2021, 12(4): 2423-2435.
GAERTNER E, RINKER J, SETHURAMAN L, et al.Definition of the IEA wind 15-megawatt offshore reference wind turbine[R]. National Renewable Energy Laboratory, 2020.
KUNDUR P.Power system stability and control[M]. New York: McGraw-Hill, 1994.