2. The frequency is stable, 50Hz in Chinese mainland, 60Hz in Taiwan Province, 50HZ in Europe and 60Hz in North America.
3. The phases are the same, and accurate timing matching is needed. If there is deviation, current will be generated on the neutral line, which will waste electric energy.
Advantages of grid-connected power generation:
The power plant has the problem of grid-connected power generation. If it is not connected to the grid, that is, it is separated from the power grid, which will lead to low power generation efficiency and reduced power generation quality. For example, they use less electricity themselves, only generate less electricity and use more, and the power generated is not enough, and the power quality is unstable.
But there is no such problem after the grid connection. More power can be sent to other users on the grid, and less power can be supplemented by the power of the grid, and the power quality is relatively stable.
Extended data
Advantages of TRT
1, energy recovery, the original blast furnace gas is washed and dedusted, and then the pressure of about 220KPa is reduced to a suitable level and sent to users, which makes the residual pressure of blast furnace gas wasted. Through TRT unit, the residual pressure of gas can be converted into electric energy, and then it can be transmitted to the end users, and the original useless residual pressure can be converted into electric energy, which can obtain certain economic benefits.
2. Better control the top pressure. Generally speaking, it is better to adjust the top pressure of blast furnace through the static blades of TRT unit than the pressure reducing valve group, which can bring more stable top pressure of blast furnace. The stable top pressure can make the blast furnace easier to control and has a positive effect on the output.
3, reduce noise, because the pressure reducing valve group is fully enclosed, the gas passes through the turbine, and the noise and vibration are converted into electric energy in the form of work, so the noise of the pressure reducing valve group can be effectively reduced.
Baidu encyclopedia -TRT
Baidu encyclopedia-grid-connected power generation