How about turning off the lights for one hour on March 28th? No one knows, at least not me.

I don't agree with you! What you said is only considering the operation of thermal power plants.

Factories, hospitals, banks and many other departments are unable to cut off power. At the same time, the power outage is only for residents and can be used for industrial production! The thermal power station is running at full capacity, but it can't meet the needs of industrial production at all, not to mention the electricity consumption of residents, so it needs hydropower stations. At the same time, the hydropower station itself has the function of peak shaving, that is to say, according to the demand, how many units are opened to generate electricity. (For example, Xiaolangdi has the function of peak regulation, which generates more power during the day, summer and spring, and generates less or no power at other times).

PS:

Judging from what you said, I believe people who know electricity are familiar with the word "frequency conversion". That is to say, using "frequency converter" (another name for industrial equipment) can "return" electric energy to the power grid for storage when users have surplus electricity. Just like such a function, everyone is using something at the same time, and now someone stops using something, then the rest will return to the whole part and be shared by others. At the same time, it can ensure the stable and balanced operation of the power grid, and the frequency conversion function is far greater than the above.

As for what you said about opening the floodgates and releasing water, .

I wonder if you know anything about hydropower stations. The volute of Xiaolangdi (water flows into the front of the turbine, and then the impact force pushes the turbine blades in the lower part of the volute to rotate, and the turbine shaft is connected with the generator shaft to rotate together, thus generating current. There is a cylinder valve in front, but it doesn't mean that it is open every time power is generated. Indicates a system failure, the valve is closed for system maintenance and the gate is opened for a long time.

What really stops the water flow is a component called a guide vane. When the power station console gives an electric signal, the relay gives a moment to the guide vane, and the guide vane opens (the opening of 0- 100% can be adjusted, so as to adjust the turbine speed and finally adjust the voltage). When power generation is not needed, the guide vanes are closed. The switching time is realized in just a few seconds!

The gate you mentioned is used to release water, and it has nothing to do with power generation.