First of all, the principle is that if you can connect to the grid, then the phase, frequency and waveform of the electricity sent will be consistent with the grid. 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 plants adjust the amount of coal burned, hydroelectric power plants adjust the water flow, and nuclear power plants are too difficult to adjust. Then came the wind power adjustment. You can't decide the speed or didirection 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, the electricity will 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 electrical network, aUnreliable power supply is therefore a significant problem. factor limiting the development of wind energy. So how wonderful is a big battery? If you put a large battery in a wind power station 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.
What are the main influencing factors of wind energy production
1. Why it is necessary to install a reactive power compensation device:
1. Under the active power of the energy consumption enterprise, the smaller the cosΦ, the higher the apparent power. In order to meet the demand for electricity, the capacity of power supply lines and transformers is also greater. investment in power supply, but also reducest the utilization rate of the equipment, will also increase the loss of the line network.
2. The power factor of the load is low, which is detrimental to the electrical system.
3. National electricity supply and consumption regulations stipulate that during the peak load of the electricity grid, the power factor of users must meet the following standards: industrial high-voltage electricity users and those equipped with charging -voltage adjustment devices. For electric power users, the power factor is 0.9 or higher; for other power users of 100 KVA and above and large and medium-sized electric drainage and irrigation stations, the power factor is 0.85 or higher; ; for agricultural electricity, the power factor is 0.80 or more. For users whose power factor does not meet theabove regulations, the power supply department will fine them according to a certain proportion of the user's electricity charges (power tariff electricity charges). To improve the power factor of the company, reactive power compensation should be carried out. carried out and it can be turned on or off in time according to load and voltage changes to prevent reactive power from flowing back.
2. Where to install it:
Not much to say, just look at the photo above. The small house under the wind power plant is a box-type substation. There are transformers and reactive power compensation devices inside.
3. Principle of reactive power compensation
The power produced by the power grid has two parts: one is the active power;. Directly consume electrical energy, convertedconvert electrical energy into mechanical energy, thermal energy, chemical energy, or sound energy, and use that energy to do work. This part of the power is called active power, it does not consume electrical energy; electrical energy into another form of energy. This type of energy is a necessary condition for electrical equipment to operate, and this energy is periodically converted into electrical energy in the power grid. This part of the power is called reactive power. When current operates in the inductive element, the current lags behind the voltage. When the current is running in the capacitor element, the current is 90° ahead of the voltage in the same circuit, the inductor current and the current. The capacitor currents are in opposite directions, with a difference of 180° from each other. If the elements of the capacitor sont installed proportionally in the circuit of electromagnetic elements, so that the currents of the two cancel each other, so that the angle between the current vector and the voltage vector is reduced to achieve the compensation goal.
I think there are three main points.
1. One of the main obstacles to the development of China's wind power industry is the lack of talent and technology, which makes the localization of wind power equipment manufacturing a technical bottleneck.
2. Cost and price are also one of the factors affecting the development of wind power. The cost of wind power generation mainly consists of fixed asset investment cost, accounting for more than 85% of the total investment. One of the biggest bottlenecks in wind power development is the huge one-time investment, and the unit cost is higher than that.he of wind energy. thermal energy and hydroelectricity. Additionally, long-term maintenance also poses a heavy burden.
3. The actual development process of wind power is also limited by other factors. For example, the construction of wind farms must comprehensively consider factors such as transportation, geology, environmental protection and connection conditions with large power. grids...< /p>