Control method and system for efficient cable untying of wind generating set

The invention discloses a control method and system for efficient cable releasing of a wind generating set. The control method comprises a wind waiting strategy, a starting self-checking strategy, a small wind working condition strategy, a large wind working condition strategy and a safety protection strategy. Based on existing unit sensing information, information mining is carried out, unit operation is predicted and judged in advance, and the operation state of the subsequent unit is confirmed, so that the cable twisting condition of the subsequent unit is judged, cable untwisting of the unit is more intelligent and efficient, and continuous power generation in the windy window period is fully and effectively utilized; the utilization time period of a high-wind-speed section of the unit is greatly prolonged, and the cable is unwound synchronously by fully utilizing the process of starting, yawing and aligning wind of the unit, so that the cable is ensured to be in an optimal state when entering a grid-conn