There is no problem with excessive power generation.
One of the characteristics of electricity generation is that production, supply and use occur simultaneously and instantaneously. So you use as much as you produce. Electrical energy cannot be stored =,=.
From what you said, if the generator output power is greater than the load, regardless of the scheduling factors, the power delivered to the load will increase. For example, voltage will increase and current will increase. Such situations will seriously affect the user's power quality, causing the equipment insulation to age or be damaged; they will also cause system instability, shocks and even serious accidents such as generator overspeed. Therefore, the role of dispatch is to try to make the power produced by the generator equal tothe power consumed by the user. Electric power generation has the above characteristics, which requires production adjustments within the entire power grid at any time to maintain balance. the evolution of total energy consumption and guaranteeing energy quality. Stay within prescribed limits. All power generation units within a power grid must strictly follow regulations and produce under unified dispatch command.
This last problem does not exist.