Unlocking Grid Flexibility and Resilience with Commercial energy storage system for Businesses
The main functions of commercial energy storage systems in microgrids include the following aspects:
1. Peak load shaving:
2. Stable output:
3. Frequency and voltage regulation:
5. Power distribution optimization:
One. Improve the stability of distributed energy resources
Two. Improve the power quality of users’ electricity
Three. peak shaving, frequency modulation
The commercial energy storage system in the microgrid can store excess electric energy generated by distributed energy sources during low load periods, and release electric energy during peak load periods to adjust load demand. As an energy buffer link in the microgrid, the commercial energy storage system is essential in the microgrid system.
In short, the commercial energy storage system is an important part of the microgrid. Its role not only helps balance the energy supply and demand relationship of the microgrid, but is also very important in ensuring the stable operation of the microgrid and improving the energy utilization efficiency of the microgrid.
Frequency regulation refers to the service provided by the grid-connected entity to adjust the active power output to reduce the frequency deviation through speed regulation systems, automatic power generation control, etc. when the power system frequency deviates from the target frequency. Assuming that the rated frequency of the power grid is 50Hz, mismatch between the power generated by the power grid and the load power will cause the frequency of the power grid to change. In order to stabilize the frequency around 50Hz, frequency modulation is required.
Frequency modulation is divided into primary frequency modulation and secondary frequency modulation. Primary frequency regulation refers to the service provided by conventional units through the automatic response of the speed regulation system, and by grid-connected entities such as new energy and energy storage through rapid frequency response, when the power system frequency deviates from the target frequency, the active power output is adjusted to reduce the frequency deviation. Secondary frequency regulation means that the grid-connected entity uses automatic power control technology, including automatic generation control (AGC), automatic power control (APC), etc., to track the instructions issued by the power dispatching agency and adjust the power generation and consumption in real time according to a certain adjustment rate to meet The services required for power system frequency and tie line power control are mainly AGC services for energy storage.
Electrochemical energy storage frequency modulation has certain advantages. Frequency modulation has high requirements on speed and accuracy. There are delays and deviations in the AGC frequency modulation performance of thermal power units. However, the electrochemical energy storage AGC tracking curve and the command curve can basically be consistent, and precise adjustment can be achieved, and there will be basically no problems in thermal power frequency modulation. Problems such as adjustment reversal, adjustment deviation and adjustment delay.
Four: Emergency backup
Five: Power distribution optimization
As an important functional unit of the microgrid, energy storage technology can effectively solve the negative impact on the power grid caused by the high proportion of renewable energy applications. It can not only be used to reduce or eliminate the mismatch between power generation and demand, but also solve the problem of demand forecasting. The uncertainty is of great significance to the safe operation of microgrids. It also provides necessary means for peak shifting and valley filling, and has great application space in microgrids.
Summarize:
With the development of renewable energy and energy storage technology, the structural composition of microgrids has become increasingly complex and diverse. How to achieve reliable and stable operation of microgrids is one of the key research contents in the current field of energy structure transformation and smart energy. The flexible application of advanced energy storage technology in microgrid projects is of great significance to improving energy utilization efficiency and promoting energy reform. It is also one of the key technologies focused on in the development of microgrid technology.
With the rapid development of renewable energy, the application of renewable energy microgrids will provide a broad market space for commercial energy storage systems. Whether commercial energy storage systems can be applied on a large scale in microgrids depends on new and emerging storage systems. R&D and breakthroughs in energy technology, continuing to search for energy storage materials with excellent performance, low consumption, and low cost, and improving the energy density, power density cycle life, and rapid response capabilities of energy storage technology are the development directions of new energy storage.
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