What impact does wind power have on the operation of the power system?

The reduction of wind power from a higher output level to a lower level or outage will have a greater impact on the operation of the power grid. The intermittent characteristics of wind power determine the random fluctuation characteristics of wind farm output. After wind power is connected to the power grid, it does not have the characteristics of stable and dispatchable output of traditional thermal power plants. For the power grid, the output fluctuation of wind power is more like a negative load disturbance. Therefore, the conventional power supply in the power grid not only needs to leave enough reserve for load fluctuations, but when a large amount of wind power is injected into the power grid, it is also necessary to consider leaving a certain reserve for the wind farm to balance the changes in the wind farm output. When the wind farm output fluctuates greatly, other power plants in the power grid need to be dispatched to change their output levels to balance the changes in wind power output. Especially when the load is low, the conventional power plant units have been adjusted to lower output. If the wind farm output increases significantly at this time, whether the conventional units can further output power to allow wind power to carry the load determines the grid's ability to accept wind power, that is, It is said that the peak shaving ability of conventional units during low load periods is a key condition that limits the ability of provincial power grids to accept wind power.