Adaptive strategy optimization method and device for large-scale photovoltaic access to weak power grid

The invention discloses an adaptive strategy optimization method and equipment for large-scale photovoltaic access to a weak power grid, and the method comprises the steps: enabling a photovoltaic unit to enter a high/low voltage ride-through strategy mode according to the voltage change of a system after the fault disturbance, and adjusting the reactive output of the photovoltaic unit at the same time. According to photovoltaic transient state control characteristics and grid-connected guide rules, a universal high-low voltage ride-through control simulation method is designed, the method combines a photovoltaic operation state and a high-low voltage ride-through universal control strategy, high-low voltage ride-through complex control logic modeling of a power generation system is carried out, power response characteristics in a voltage ride-through period are simulated more accurately, and the power generation efficiency is improved. And the method has relatively good operability and universality. 本发明公开了大规