考虑系统频率安全稳定约束的风储联合频率响应控制策略OACSTPCD

For a wind storage joint operational system,the current frequency modulation control strategy does not give full play to the frequency regulation ability of the wind turbine,cannot adapt to excessive load disturbance,and there is also a problem of secondary frequency drop in the rotor speed recovery phase.To improve the dynamic frequency stability performance,this paper proposes a wind storage joint frequency response control strategy considering system frequency safety and stability constraints.At the inertia response phase,the virtual inertia and droop control coefficient are adaptively adjusted in combination with the constraint of speed and frequency indicators.In the rotor speed recovery phase,the negative exponential function is used to dynamically adjust the power reference value in the speed recovery process to avoid a secondary drop of frequency.At the same time,combining wind turbines with energy storage battery devices,the concept of frequency stability domain is introduced,and energy storage batteries are used to expand the boundary of the frequency stability domain,further improving the ability of wind storage joint systems to accept load disturbances and frequency stability.Finally,simulation verification is conducted on the strategy,and the results show that the proposed control strategy takes into account the wind turbine frequency response ability at different wind speeds and disturbances,while avoiding secondary frequency drops and improving the frequency safety and stability of the power grid.