In other words, as far as photovoltaic power generation and wind power generation have seized the share of the old dynamic power generation, the early national grid was all thermal power generation. For example, in Gansu, China, the actual annual electricity consumption is 10,000 kilowatt-hours of electricity, and thermal power generation is 7,000 kilowatt-hours. If the photovoltaic power is 6,000 kilowatt-hours and the wind power is 5,000 kilowatt-hours, then the power grid company will give priority to using thermal power generation to connect to the grid in full, and then distribute the rest to photovoltaic and wind power. This will result in excess capacity of photovoltaic and wind power generation! I still can’t bear to give up thermal power generation, it involves too many interests, I hope you will adopt it!
Will the increase in the proportion of wind power and photovoltaic power generation affect the stability of the power system?
In 2009: thermal power accounted for about 80%, hydropower accounted for about 16%, and the rest were wind power, Nuclear power and others are now vigorously developing clean energy, so the proportion of thermal power will decrease. The trend is that the proportion of clean energy such as hydropower will increase. (Search China’s power supply structure online) In 2010, the annual electricity consumption was 4 trillion kWh. (Search China's annual electricity consumption online) It is not feasible to stop coal power (thermal power): 1. The development of other clean energy requires a process. The hydropower construction cycle is 5 to 20 years. Although many power stations can be built at the same time, it also takes time. The site selection requirements for nuclear power are relatively strict, safety needs to be considered, and the development will not be too fast. Wind power energy reserves are limited. 2. Thermal power has advantages that other electric power does not have: stability and few restrictions on plant site conditions. Most hydropower is seasonal, and power generation varies greatly between wet and dry periods. Wind power is also limited by the uncertainty of wind energy. 3. Related to local economy. This involves the sales of coal companies and the operation and development of power companies. By shutting down coal power, coal mines have lost huge stable and high-quality customers. Electric power giants that mainly focus on thermal power cannot squeeze into the development of other energy sources. If they have no food to eat, they will definitely not do it. 4. Disadvantages of nuclear power. The cost of power plants is higher than thermal power. There is no conclusion internationally on the safety of nuclear power. Since a large amount of cooling water is required, it can only be built in areas with abundant water and low seismic intensity. The biggest problem is that the treatment of nuclear waste is currently landfilling or turning back for disposal. Landfilling is the stupidest method and pollution to the environment is inevitable; recycling requires specialized technology, equipment and treatment plants. The current processing capacity is too weak, and new construction and expansion will take time. (Internet search for nuclear power disadvantages and nuclear waste treatment)
It will affect the stability of the power system.
Wind power and photovoltaic power generation are representatives of renewable energy. The power generation is affected by weather conditions and has a certain degree of randomness and unpredictability. This makes the power system face some challenges when integrating wind power and photovoltaic power generation on a large scale. The volatility of new energy power generation causes fluctuations in grid frequency and voltage, affecting the stable operation of the grid. Large-scale integration of wind power and photovoltaic power generation will increase the uncertainty of the power grid. The integration of new energy power generation also requires solving technical challenges in grid stability and reliability.