The neutral point of the hydrogenerator is generally connected to the protection, so you see that some motors have 9 wires instead of 6 wires. Simply use 6 neutral point wires to connect the differential protection sensor. The neutral point should theoretically have zero voltage to ground. However, due to different power generation capacities, some neutral points are directly grounded, and some neutral points are suspended. For the grounding case, the voltage must be 0. As for the neutral point current, because everything is hydroelectric. generators require It to run on the grid, so there must be a transformer connected behind the unit, so the current will not be very large. The specific value depends on the state of the generator. Is there a single phase short to ground? This is always the normal value, which can be calculated using specific parameters.
Likent know how many kilowatt hours of electricity a hydroelectric generator generates? Knowing its power,
The principle of a hydroelectric generator (water turbine) is as follows: water circulates through the turbine, the energy of the water is converted into energy mechanical and the rotating shaft of the hydraulic turbine drives the rotor of the generator, which converts mechanical energy into electrical energy and produces it.
The world's first hydroelectric power station was built in France in 1878. America's first hydroelectric power station was built in Wisconsin, United States, in 1882, using a direct current generator. After 1889, three-phase alternators began to be used. Since then, the capacity of a single machine has increased rapidly. In 1890, it was only 15,000 kW. By 1955, it could produce 105,000 kW generators. Before 1949, the capacity of a single unit of hydraulic generators manufactured inChina did not exceed 200 kW. After 1949, the automobile industry developed vigorously. In 1958, it was able to produce a single 72,500 kW unit. In 1972, a double unit of 300,000 kW. -An internal water cooling water generator has been produced. The world's leading large-capacity hydroelectric generators are the 718,000 kVA stator water-cooled semi-umbrella hydroelectric generator of the Grand Coulee Hydroelectric Power Station, the 737 kVA stator water-cooled semi-umbrella hydroelectric generator 000 kVA Itaipu Hydroelectric Power Station and the 700,000 kVA water stator hydroelectric generator. -Guli Hydropower Station cooled semi-umbrella hydroelectric generator, kVA air-cooled umbrella hydrogenerator and 800,000kW Xiangjiaba hydrogenerator, etc.
The simplest method is to calculate based on your electric meter, record the power generated duringa certain period of time, then divide it by the time, which corresponds to the power of your generator. For example, if you record it for one hour, the electric meter number is 100 kilowatt hours, which is equivalent to 100 kilowatt hours. If divided by one hour, the power of the generator 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 in the spiral chamber of power plant.