The simplest method is to calculate based on your electricity meter, record the amount of electricity produced during a certain period of time, then divide it by the time, which is the power of your generator, for example if electricity is produced. The meter you record for one hour is 100 degrees, that is, 100 kilowatt hours, divided by one hour, the generator power is 100 kilowatts. I don't know which aspect you are talking about between the theoretical value and the real value. If the above calculation method is used, in addition to the influence of power factor and multiple reactive power, it is also more accurate. If we talk about the generator power calculated based on the head flow, then it is difficult to determine the actual difference in power generation which may be affected by the manufacturing process and construction of the flow channel ins the spiral chamber of the power plant.
It is recommended to directly enter the 1000 kW hydraulic generator on Baidu and view the corresponding manufacturer's quotation above. It produces 1,000 kilowatt hours of electricity every hour. As for the flow rate, since I have to go to work, you can calculate yourself N=9.81QHn n is the hydraulic loss coefficient, which generally ranges from 0.9 to 0.98.