In the field of energy storage, energy storage power stations play an important role. The application of energy storage power station technology runs through all aspects of power generation, transmission, distribution, and electricity consumption in the power system. Realize power system peak shaving and valley filling, renewable energy power generation fluctuation smoothing and tracking plan processing, efficient system frequency regulation, and increase power supply reliability.
1. What is an energy storage power station?
An energy storage power station is a power station established to adjust peak and valley power consumption issues. An energy storage power station is composed of an energy storage unit, auxiliary facilities, access devices, and measurement and control devices. The establishment of energy storage power stations is to store the electricity we waste during low peak periods of electricity consumption and release it back to the grid during peak electricity consumption periods to achieve the purpose of peak shaving and valley filling.
2. Energy storage power station system composition
The energy storage power station system can be divided into six main parts, namely renewable energy, energy transmission system, conversion system, storage system, management system and network access system.
1. Renewable energy
Renewable energy can provide renewable energy, such as wind power generators, solar arrays, tidal current generators and other renewable equipment with high power conversion rates. These equipment are conducive to improving the economic benefits of energy storage systems.
2. Energy transmission system
This is the connection between renewable energy and conversion systems. The energy transmission system is the most important part of the energy storage power station system and requires high reliability. It is the key bus between all devices in the energy storage system, sending electrical energy to the conversion system.
3. Conversion system
This is the core part of the energy storage power station and its networking system. It is used to convert renewable energy or other externally input electric energy into electric energy with a specific voltage and send it to the storage system or network access system according to different requirements. The key components of the conversion system mainly include transformers (converting voltage), inverters, rectifiers (changing current), etc.
4. Storage system
Including batteries, hydrogen fuel cells, supercapacitors, hydrogen storage and other energy storage devices, which can realize the storage and output of electrical energy.
5. Management system
It is the core component of energy storage system control and management. It is mainly used to monitor and detect the working status of various parts of renewable energy, conversion systems, storage systems and network access systems, and implement corresponding control measures to achieve energy conservation and power saving. , the purpose of security control.
6. Network access system
This is an important component of the energy storage system. Its main function is to input the electric energy stored in the energy storage system into the grid. When the load demand is low, excess energy can be output to the grid to achieve power balance. Purpose.
3. The value of energy storage power station construction
1. Improve power quality
Currently, grid operators are more concerned with preventing outages than with power quality. Power quality refers to a complete set of indicators that enable appliances and systems to function as intended, without causing significant waste in performance.
The 921st century power quality standards trend refers to providing power without dips, spikes, chaos and interruptions. Poor power quality can lead to malfunctions, premature failure, or inoperability of equipment. Critical applications in hospitals and emergency services require a high degree of safety. Some experts even predict that consumers will be offered different levels of quality at different prices.
2. Higher utilization of assets
In most industries, supply and demand are almost equally important. But in the power industry, demand remains king. Utilities must be able to predict demand as it emerges before delivering electricity. I don't know when the dosage will appear. "Peak" and how high must the common utility be at all times? "peak" and provide usage at all times, even though they know the peak time does not exceed 5%.
Storage technology can provide an economic buffer and a safety factor while meeting demand.
Because wholesale electricity prices vary throughout the day, when you sell power is just as important as how much power you sell. The cost of storing electricity produced during off-peak hours is easily offset by the value during peak hours. New capital investments in new equipment may be reduced.
3. Enhanced renewable energy
Renewable energy sources such as wind and solar are variable and difficult to predict. Storing energy can help solve problems associated with renewable energy and help these technologies develop faster and achieve greater market size. From low-value, unplanned power sources to high-value, reliable products through storage of renewable energy power resources. Storing renewable energy and releasing it through contracts makes electricity more valuable. Off-grid power systems are a small part of global capacity that is available from a wider range of generation sources and make them more valuable.