Among all kinds of energy storage technologies, battery energy storage is developing very fast and is the direction of energy storage technology that attracts attention. Energy storage battery technology has also begun to develop in a diversified direction, bringing convenience to our lives, so you know these Could high tech contain energy storage batteries?
1. Application scenarios of energy storage batteries
(1) Grid-connected renewable energy
The intermittent and volatile nature of renewable energy power generation, as well as the continuous increase in penetration rate, pose severe challenges to the normal operation and dispatch of existing power grid systems. In recent years, in order to utilize more renewable energy as much as possible and improve the reliability and efficiency of grid operation, various energy storage technology research and engineering demonstration projects have developed rapidly. The large-capacity battery energy storage technology is applied to wind power and photovoltaic power generation, which can smooth the power output fluctuation, reduce its impact on the power system, improve the power station's ability to track the planned output, and provide backup energy for the construction and operation of renewable energy power stations.
(2) Power grid auxiliary services
Grid auxiliary services are divided into capacity-based and power-based services. Capacity-based services such as grid peak shaving, load following and black start, etc., the scale of energy storage needs to reach a certain volume, generally between 1 and 500 MW, and the discharge time is greater than 1 hour; Power-based services such as FM assist and voltage support require a large power or voltage output from the battery for a short period of time (on the order of minutes). In terms of improving the frequency regulation capability of the power grid, the energy storage battery technology can reduce the loss of traditional frequency regulation power supply caused by frequent switching; in terms of improving the peak regulation capacity of the power grid, the energy storage system can respond to dispatching in a timely and reliable manner according to the changes in power supply and load command, and change its output level according to the command.
(3) Power grid transmission and distribution
Energy storage battery systems can improve power distribution quality and reliability. When the distribution network fails, it can be used as a backup power supply to continuously supply power to users; in terms of improving power quality, it can be used as a system controllable power supply to manage the power quality of the distribution network, eliminate voltage sags, harmonics and other problems, while reducing the backbone Network expansion investment, saving expansion funds.
(4) Distributed and micro network
The microgrid system requires an energy storage device, and the energy storage device is required to be able to do the following: 1) Provide short-term uninterrupted power supply in the case of off-grid and distributed power supply cannot supply power; 2) Can meet the peak regulation of the microgrid 3) It can improve the power quality of the microgrid; 4) It can complete the black start of the microgrid system; 5) It can balance the output of intermittent and fluctuating power sources, and effectively control the electrical load and thermal load. The energy storage battery system has the characteristics of dynamic energy absorption and timely release. As a necessary energy buffer link of the microgrid, it can improve the power quality, stabilize the network operation, optimize the system configuration, and ensure the safe and stable operation of the microgrid.
(5) User side
User-side energy storage mainly includes industrial and commercial peak shaving and valley filling and demand-side response. Batteries combined with power electronics technology can provide users with reliable power supply and improve power quality; and use the difference between peak and valley electricity prices to save users expenses.
(6) Energy supply system of electric vehicle VEG mode
The development of the new energy vehicle industry must be coordinated with the energy storage industry. In order to meet the demand for safe and fast charging of electric vehicles in the future, it is necessary to establish a distributed energy station similar to a gas station. The energy station is equipped with a low-cost, long-life megawatt-level energy storage battery, which can be charged and stored from the power grid and used for electric vehicles. Cars are charged quickly; at the same time, the energy station can also interact with the grid for power peaking or frequency regulation.
The above is an introduction to the application scenarios of energy storage batteries. The complexity of energy storage application scenarios determines the diversified development direction of energy storage battery technology.
