With the current development of new energy and public subsidies for photovoltaic energy production, many investment companies and individuals have entered the new energy sector, including photovoltaic energy production, wind power generation, etc., and have a high level of electricity generation production and consumption. According to the requirements, operators of abandoned wind and photovoltaic power plants must also have information available at all times. So, for this point, power generation power forecasting technology is necessary. In general, few companies can predict very short-term power by more than 90%. As far as I know, Dongrun Huaneng has a new energy portal platform. can be assessed online. It is recommended to go and try it
What are the problems with connecting tens of milions of large wind power plants to the grid and why?
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! To put it simply, when the weather is sunny and the wind is blowing, the thermal powere insufficient will be completed. 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 an electricity shortage, thermal energy is used! And the price of new energy electricity connected to the network is relatively high! This means that when the sun rises, the heat load decreases 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 the transmission of harmonics to the power grid system, which will increase power losses and affect motor efficiency, which will affect the manufacturing of high precision ! These two raisons 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 it 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 power generation are actually not well received by the power grid, but due tostate support for new energy and requirements for 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.
The first is the principle. If you can connect to the grid, then the phase, frequency and waveform of the electricity sent will beconsistent with the network. Then the load of the power grid is determined by the user, and the load is changed according to the distribution curve derived from statistics, and then the task of adjusting the load is simply left to the power plant (if convenient) . Thermal power plants, nuclear power plants and hydroelectric power plants can all adjust load levels. Of course, nuclear power plants generally do not operate as peak-shaving power plants. Thermal power stationIt is by adjusting the quantity of coal burned that hydroelectric power stations adjust the water flow. Nuclear power plants are too difficult to adjust. Then came the wind power adjustment. You cannot decide the speed or direction of the wind. If it is windy, you will have electricity. If there is no wind, it will be lowered. generated. When the wind is weak, electricitywill be weak. This electricity. How can I offer it? The power grid is actually allowed to fluctuate, and it is impossible for all power plants to operate stably, so low impact is still acceptable for the large power grid. It therefore does not matter whether small-capacity wind energy is connected to the electricity grid. If you change it here, I will have to work hard to change the thermal power generation there (people at this plant will scold you). to death, it's really annoying). However, there are problems with large capacity wind energy access systems. Instability means the power supply is unreliable, which will impact the power grid. Instability is the most taboo of the power grid, so unreliable power supply is a significant problem. factor limiting the development of wind energy. So how big a battIs erie wonderful? If you put a large battery in a wind power plant for charging, it can be connected to the grid when it is full, and then recharged when it is empty, which can solve the problem of. energy storage is good wind energy.