At present, the largest thermal/nuclear power generation unit is at the level of 1,750 MW. There is no problem trying to get 2000MW, 3000MW may be possible, but don't think about higher single units. The capacities of transformers and motors are not as large as those of synchronous generators.
For synchronous generators, the process of converting electrical energy involves cutting the magnetic lines of the rotor winding by the stator winding bars. For a single generator, several main factors determine power: Mechanical. structure (including main motor operation), stator insulation level (for unit output voltage), magnetic field parameters (mainly corresponding to unit polar capacitance), cooling (rotor excitation winding, single winding stator, maximum current, losse of core).
For large thermal power units, water-hydrogen cooling is generally used for cooling, and the voltage across the machine has also been increased to the highest level possible in power engineering. materials. If the capacity is to be further increased, mechanical It will inevitably require additional amplification, which is economically impractical for existing industries and it is even more impossible to achieve an order of magnitude amplification.
Therefore, there is no future to make a 100 kilowatt motor based on existing motors. However, since it only requires power, the concept can be changed by removing the words (motor refers to conversion or). transmission of electrical energy based on the law of electromagnetic induction). An electromagnetic device) can hardly be compared to the Z-pinch equipment - wellthat this device also uses electrical energy to accelerate the tungsten wire or metal cylinder through the most basic electromagnetic conversion, but after accelerating the wire array or metal cylinder, it became a plasma, but the power is sufficient. Currently, TW level power can be achieved (of course, the time is extremely short, from a few to several hundred ns). .
How to calculate the average operating hours of the generator set
The capacity of the steam boiler is expressed in terms of evaporation, and the unit is t/ h (commonly called tons of steam). Strictly speaking, the evaporation capacity of a steam boiler is the same, but when the rated pressure and temperature are different, the value of the enthalpy of the steam it provides is different, that is- i.e. the thermal power of a steam boiler of the same value; The capacityevaporation but the nominal pressure and temperature are different. \x0d\The steam generated by the boiler is measured in tonnage, but the power generated by the steam turbine is measured in heat, which can effectively be converted: electrical power of the generator MW = tonnage of the boiler × enthalpy of steam per ton × turbine efficiency × generator efficiency \x0d\ Installed capacity of power plant For the corresponding basic relationship between MW capacity and boiler tonnage, please refer to the following table\x0d\1. Boiler evaporation capacity: 75 t/h; MPa/450℃. The capacity of the supporting steam turbine generator unit is 12 MW \x0d\2, medium pressure boiler; boiler evaporation capacity: 130 t/h; main steam parameter 3.82MPa/450℃. The capacity of the supporting steam turbine generator unit is 25 MW \x0d\3, high pressure boiler; evaporation capacityboiler: 220 t/h; main steam parameter 5.4MPa/540℃. The capacity of supporting steam turbine generator unit is 50MW \x0d\4, boiler evaporation capacity: 260t/h, main steam parameter 5.4MPa/540℃. The supporting turbine-generator unit has a capacity of 60 MW\x0d\5 and a high-pressure boiler; boiler evaporation capacity: 410 t/h; main steam parameter 5.4 MPa/540 ℃. The capacity of the supporting turbine generator unit is 100 MW\x0d\6, ultra-high pressure boiler; boiler evaporation capacity: 440 t/h; main steam parameter 13.7MPa/540℃. The capacity of the supporting turbine-generator unit is 135 MW \x0d\7, subcritical boiler; boiler evaporation capacity: 1,025 t/h; main steam parameter 14.7 MPa/540℃. The capacity of the supporting turbine generator unit is 300 MW\x0d\8, supercritical boiler; evaporation capacityon of the boiler: 1,900 t/h; main steam parameter 26.2MPa/566℃. The capacity of the supporting turbine generator unit is 600 MW\x0d\9, supercritical boiler; boiler evaporation capacity: 3,000 t/h; Main steam parameter 26.2 MPa/605℃. The capacity of the supporting turbo-generator unit is 1000 MW
1. The operating hours converted from generator electricity production to full load operation are the average operating hours (daily average, monthly average, annual average, etc.). Annual electricity generation usage hours = unit annual energy production/unit capacity
2. Analysis example:
Power generation equipment usage hours refers to the utilization level of the power generation equipment. production capacity and an indicator of its level.
The precise method is: the number of hoursoperating hours calculated by dividing electricity production by the capacity of the electricity generation equipment during the reference period. There is another indicator with the same concept: equipment utilization, which is the ratio between the number of hours of use of electricity generation equipment during the reference period and the number of calendar hours during this period. It should be noted here that the reporting period is used. When using these two indicators, one must pay attention to the timing of the reporting period.
For example: If a 3 MW wind turbine is commissioned on January 1 and has a cumulative electricity production of 6,000 kWh at the end of the year, and another 3 MW wind turbine 2 MW goes live on July 1 and has a cumulative electricity production of 3,000 kWh by the end of the year, so they will. The hours of use are respectivelynt of 2,000 hours and 1,500 hours, and the utilization rates are 2,000/8,760 and 1,500/4,416, respectively, or 22.8% and 34.0%. It is obvious that the utilization degree of the second wind turbine is higher. (8760 and 4416 are respectively the number of hours of the whole year and the second half of the year, 8760=24×365, 4416=24×184)
If converted to a year , the number of hours usage hours are 2000 and 3000 hours respectively. It can also be seen that the second fan is used to a greater degree. Considering two wind turbines as a single wind farm, the whole wind farm can produce 12,000 kWh of electricity throughout the year and the installed capacity is 5 MW. The annual operating hours of the wind farm are 2,400 hours. If you don't pay attention to the reporting period and add it up directly, the electricity production is only 9,000 hours. If you divide it directlyent, you will get an incorrect result of 1800 hours. For renewable energy power plants such as wind farms and photovoltaic plants, many wind turbines or photovoltaic panels are often connected to the grid in batches to generate electricity. When looking at the number of hours, pay attention to the reporting period for each number and batch.