First of all, you need to check whether this is caused by the generator itself, for example: insufficient turbine power, overheated generator bearings, insufficient technical water supply or blocked technical water supply. Again, check if this is due to the operating mode, such as phase leading operation, phase modulation operation, output limiting, etc. Third, check if this is due to system planning that limits generator power. Of course, the operating point of the generator does not necessarily operate under the rated working conditions. Sometimes it operates above rated working conditions, and sometimes below rated working conditions. These are very normal and specific problems that require detail. analysis.
Why do we need to build higher dams when we use river water tor produce electricity, instead of directly using the water flowing in the river to influence the turbine generator to produce electricity?
To be precise, a hydraulic generator should be called a hydraulic generator set. It consists of a hydraulic turbine and a generator combined with a generator. It is a device that uses hydraulic energy to drive the turbine. to drive the generator to produce electricity. Turbines generally include Francis type, axial flow type, impact type, etc. are power generation equipment composed of different shapes and generators based on different heights and flow rates.
What is the principle of hydroelectric power generation?
First of all, I forgive you for not understanding the principles of hydroelectric power generation.
To produce electricity, you need potential energyand kinetic energy. By the way, the kinetic energy you mentioned is one of the energies. The water level is low and the flow is high. If we want to produce the same output, the speed of the unit will be very low and the size will be large. When we want to fully utilize the water resources of the river, the selected value. This model will exceed our human capabilities. For example, ultra-low speed and ultra-large size (theoretically exists). Our materials, structure and project cost can all exceed the standard. Either the extraordinary model cannot be produced or it cannot be exploited. Consequently, the development of a river basin is a matter of rational use of water resources. Make reasonable use of the potential and kinetic energy of water and choose a reasonable model. And to satisfy us as humans. And this cannot exceed our capabilities.
At current timeTypically, the highest water height can reach more than 1,000 meters and the lowest can reach 1 to 3 meters. Different models are available. Every shape is also subject to structural constraints, and you don't have to be as big as you want. As small as you want. For example, for impact units, we only have 6 nozzles at most. For bulbs, the minimum water height is only around 2 meters, which is subject to certain technical restrictions.
When water with potential energy or kinetic energy is thrown against the turbine, the turbine begins to rotate. If we connect a generator to the turbine, the generator can start producing electricity. If we raise the water level to flush the turbine, we can see that the speed of the turbine increases. Therefore, it can be seen that the greater the difference in water level, the greater the energy cinThe energy obtained by the turbine is greater and the greater the electrical energy that can be converted. This is the basic principle of hydroelectric power. The energy conversion process is as follows: the gravitational potential energy of the upstream water is converted into the kinetic energy of the water flow. When the water flow passes through the hydraulic turbine, the kinetic energy is transferred to the steam turbine. generator to rotate and convert kinetic energy into electrical energy. It is therefore the process of converting mechanical energy into electrical energy.
Due to the different natural conditions of hydropower plants, the capacity and speed of hydroelectric generator set vary greatly. SkipThe very small hydrogenerators and high-speed hydrogenerators driven by impact turbines mostly adopt horizontal structures, while the large and medium-sized generators liveesse mainly adopt vertical structures. Since most hydroelectric plants are located far from cities, they usually have to power the load via long transmission lines. Therefore, the power system imposes higher requirements on the operational stability of the hydroelectric generator: the engine parameters must be carefully selected. ; The required moment of inertia is large. The appearance of a hydrogenerator is therefore different from that of a steam turbine generator. Its rotor has a large diameter and short length.
The hydropower unit takes a short time to start and connect to the grid, and the operation schedule is flexible. In addition to general electricity generation, it is particularly suitable as a peak shaving unit and as a peak shaving unit. emergency rescue unit. The maximum capacity of the hydrogenerator unit has reachednt 700,000 kilowatts. As for the principle of a generator, it is very clear in high school physics. Its operating principles are based on the law of electromagnetic induction and the law of electromagnetic force. Therefore, the general principle of its construction is: using suitable magnetic and conductive materials to form magnetic circuits and circuits that conduct electromagnetic induction among themselves to generate electromagnetic energy and achieve the conversion goal of energy.
?