Domestic photovoltaic power plants are composed of photovoltaic modules, photovoltaic inverters, photovoltaic supports and photovoltaic cables. Photovoltaic modules receive sunlight and generate direct current. Photovoltaic energy production is photoelectric conversion, not physical energy production, nor chemical energy production. This process does not produce pollution and produces no waste. Therefore, photovoltaic energy production is clean energy without pollution, without radiation and inexhaustible.
Photovoltaic inverters are typically installed in residents' homes to convert the DC energy generated by photovoltaic energy into alternative energy before it can be used or integrated into the electricity grid. Some residents also worry about the safety of electrical appliances. In fact, there is no problem with undulatesurs of good quality and with ventilation of electrical appliances. The radiation is much lower than that of the television at home.
Wind power and photovoltaics are new energy sources that China is working to develop. The electricity network must fully absorb them and prioritize their use. Hydroelectricity also requires priority use of the electricity network during periods of flooding. This is a comprehensive consideration of a series of factors such as environmental protection and the reduction of carbon emissions by the State. The electricity network can therefore do nothing! Why is it called “junk electricity”? There are mainly two aspects.
First, photovoltaic and wind power have low installed capacity and are scattered, making it difficult to meet the peak load regulation needs of the power grid! For simplicity,When the weather is sunny and the wind is blowing, the insufficient thermal power will be supplemented. When short-term electricity demand increases rapidly, photovoltaic and wind power cannot meet it. On cloudy days and when there is no wind, the power plant is dead. In the event of a power outage, thermal energy is used! And the price of new electricity on the network is relatively high! This means that when the sun rises, the heat load is reduced and when the sun sets, the heat load increases. For the power grid, constant adjustments are required, which is not conducive to the safety and economical operation of the power grid. Secondly, wind and photovoltaic power are not stable enough, resulting in harmonics being transmitted to the power grid system, which will increase power losses and affect motor efficiency,which will affect high precision manufacturing! These two reasons should be the reason why photovoltaic and wind energy are called "garbage energy".
Both are new energy production, which are currently encouraged and vigorously developed by the state, and there are huge state subsidies. , the grid settlement price for thermal power is about 0.3 yuan per kilowatt hour, and the price of wind and photovoltaic power generation ranges from 0.3 to 0.8 yuan.
Both types of electricity generation had a fatal flaw at the time, namely their intermittency. Solar power produced electricity during the day and could not produce electricity at night. Wind power could produce electricity when it was windy. but could not produce electricity when there was no wind. These two types of electricity production are not in fmay not be well received by the power grid, but due to the state's support for new energy and the requirements of energy saving and emission reduction, the power grid company must accept them unconditionally.
There are more and more of these two types of electricity production, which lead to instability in the electricity network. At present, we mainly rely on thermal energy peak shaving, pumped energy storage, wind energy heating and wind energy heating. building energy storage power plants to solve intermittent problems. At the same time, wind and solar energy forecasts are becoming increasingly accurate, which also reduces pressure on electricity grid regulation.