Driven by the policy of grid parity for wind power
the construction of offshore wind farms in China is accelerating
and large-scale offshore wind farms will become an important power source for local power grids in coastal areas in the future. When using offshore wind power as a black-start power source
significant load disturbances may cause the system frequency to exceed its limit
resulting in the unit shutting down after the protection device is activated
leading to black-start failure. To further enhance the frequency regulation capability of offshore wind power during the black-start recovery process
this paper first uses trajectory sensitivity analysis method to derive the dominant parameters that affect frequency deviation
and then optimizes the dominant parameters to ensure that offshore wind power has sufficient frequency regulation capability during the black-start process. Secondly
by analyzing the relationship between frequency deviation
frequency deadband
and the power capacity of each unit
the feasible parameter boundary to ensure that the active output of the unit does not exceed the limit are derived. A parameter optimization model considering capacity limitation is established
and the optimal parameters are solved using sequential quadratic programming algorithm; Finally
the effectiveness of the optimization method is verified through simulation examples.
MALEKPOUR M, KIYOUMARSI A, GHOLIPOUR M.Analytical system frequency response model with virtual synchronous wind turbines[J]. IET generation, transmission & distribution, 2021, 15(18): 2618-2631.