Create a first-class power dispatch slogan

First of all, the amount of electric energy generated by the generator of the power plant and sent to the power grid is determined by the power consumption on the power grid. That is to say, as the power equipment on the power grid decreases, the power consumption will also decrease. Moreover, due to the The generated electric energy cannot be stored temporarily, so the power generation load of the power plant must change according to the change of electricity consumption. When the electricity load of the power grid is too low, that is, the active power consumption is too small, resulting in the generator's power factor being too low ( The power factor of power plant generators is usually required to be 0.85), which will cause harm to the generator.

Hazards:

Safety: When the power factor of the load carried by the generator is too low, the operating power factor of the generator drops greatly, causing the excitation winding to operate under overload, or even Causes the excitation winding insulation to be broken down and burned.

Economic aspect: Improving the power factor of electrical appliances can reduce the transmission current, thereby reducing the power loss on the transmission line. If the power factor is too low, it will increase Power loss on the line.

Therefore, the power load of the power grid cannot be too low, otherwise some generators must be shut down appropriately to ensure the safety of the generators and the power grid.