5MW = 5000KW. Electrical power W = power P * time t = 5,000 * 24 = 5,000 kilowatt hours = 120,000 degrees.
Electrical energy can be converted into many other forms of energy. The process of converting electrical energy into various other forms of energy can also be thought of as the process by which current does work. The amount of electrical energy converted corresponds to the amount of work done by the current, that is, the amount of electrical work.
The amount of work done by the current is related to the size of the current, the voltage level, and the duration the power is on. The higher the voltage applied to the electrical device, the greater the current flowing through it, the longer the turn-on time, and the more work the current does. Research shows that when the voltage across the circuit is U, the current in the circuit is I andthe power-on time is t, the electrical power W (or the power consumed) is: W=UIt=Pt.
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Electric power is used to express the speed of consumption of electrical energy (the unit of electrical power is the watt or joule/second _= kilowatts are also commonly used). Active power is represented by a capital P in the formula.
Electric energy is often also a manifestation of electrical energy in electricity, which is why the kilowatt hour is generally the unit of electrical energy. Electrical power is represented by a capital W in the formula.
The unit "kilowatt hour" is mainly used to measure electricity, because "kilowatt hour" is easier for the public to understand than joule, and it is easier to convert to hours of electricity. use of electrical appliances. On the other hand, the unit ofThe joule measurement is too small compared to the “kilowatt hour”, making it difficult to calculate. In mainland China, some public institutions also use "megawatt hour" instead of "kilowatt hour" on their billing sheets. In Chinese, “kilowatt” is sometimes written _.
1kW·h=3,600,000?Joule=3.6 million joules
In addition, there is a unit one level below the kilowatt·h, which is the watt ·hour (symbol: W·h , in (Whr in product description) is one thousandth of a "kilowatt hour". Typically, the energy stored in a six-cell laptop battery is about 56 Whr. 1W·h=3,600 Joules
Baidu Encyclopedia - Kilowatt hour
Unchecked - Electric energy
What is the height of the wind turbine per ground ratio< /p> h3>
The largest is 5 MW, there is one in Denmark and one in China Generally, 2 MW, 1.5 MW or less 0.8 MW. are used in China
Formula for calculating thea electrical power: P=W/t =UI.
In a purely resistive circuit, according to Ohm's law U=IR and substituted by P=UI, we can also obtain: P=I2R=(U2)/R.
In dynamics: Power calculation formula: P=W/t (average power); P=Fvcosα (instantaneous power).
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When the wind turbine produces electricity, it must ensure that the output frequency is constant. This is very necessary for both grid-connected wind power generation and wind-solar hybrid power generation. ?
To ensure that the frequency of wind power is constant, one solution is to ensure the constant speed of the generator, that is, the constant speed and constant frequency operation mode , because the generator is driven by the wind turbine via the transmission device. this method undoubtedly requires constant operation of the wind turbine. The speed of rotation will affect the conversion efficiency of wind energy.
Another way is to change the speed of the generator according to the wind speed and ensure that the frequency of the output electrical energy is constant by other means, i.e. i.e. constant frequency and variable speed operation. The wind energy utilization coefficient of the wind turbine is related to the blade tip speed ratio (the ratio of the linear speed of the turbine tip to the wind speed). There is a certain blade tip speed ratio that causes Cp to reach the maximum value.
Baidu Encyclopedia - Wind Turbine
How to determine the wind power of 5 MW
81 meters.
In November 2015, China's largest offshore wind turbine was successfully installed in Pinghai Bay in Putian, Fujian. The wind turbine adopts Xiangdian XE128-5000 model, with a unit capacity of 5MW, a diameterchannel length of 128 meters and a hub center height of 81 meters. It belongs to the 50MW offshore wind power project in Pinghaiwan, Putian, Fujian.
Principle
Convert the kinetic energy of wind into mechanical kinetic energy, and then convert the mechanical energy into electrical kinetic energy. This is wind energy production. The principle of wind power generation is to use wind energy to rotate the blades of the wind turbine, then use a speed multiplier to increase the rotation speed to induce the generator to produce electricity.
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China's first 10MW direct-drive permanent magnet offshore wind turbine has completed factory testing in Deyang, China Sichuan. Dongfang Electric Group has the first IEC design certification certificate for this unit in China. This is the first offsho wind turbinere of 10 MW produced by Dongfang Electric Group.
On August 21, 2019, in Deyang, China's equipment manufacturing capital, at Dongfang Electric Group Dongfang Motor Co., Ltd., the reporter saw that this wind turbine with completely intellectual property rights independent operated normally with a live load. Around 5:00 p.m., the factory test is completed and the product can be shipped out of the factory.
Compared to wind turbines of 5 MW and less, 10 MW wind turbines are “large”. On October 17, 2018, Dongfang Electric Group Wind Power Co., Ltd. obtained the IEC design certification certificate for 10MW offshore wind turbines issued by China Quality Certification Center. This certificate is a “passport” for the design and manufacture of 10 offshore wind turbines. MW offshore wind turbines.
Baidu Encyclopedia - Wind Turbine
The wind power of this unit can be determined by the diameter of thewind turbine blades.
The larger the diameter of the wind turbine blades, the more wind energy they capture and the higher the wind turbine's energy production. Therefore, the wind power of a wind turbine can be judged based on the diameter of its blade.
The speed of wind turbines is also linked to the amount of energy produced. The higher the speed, the higher the energy production.