1. Peak to fill the valley

In recent years, the difference in load peaks of power grids has increased, and the continuous increase in the penetration rate of renewable energy power generation has further led to an increase in peak adjustment pressure. The energy storage device is used to discharge during the peak of the load, charging from the grid during the load trough, reducing the peak load demand, saving electricity costs, thereby achieving the purpose of improving the characteristics of load and participating in the system peak adjustment. Through the implementation of peak -cutting valleys, the utilization rate of power system equipment can be improved and delayed or reduced the expansion and upgrade of the equipment of the device.

According to the differences of the implementation subject, there are also differences in the targets of the Residential Energy Storage System to cut peak -cutting valley: ① When the main body of the RESIDENTIAL ENERGY Storage System is the power grid, it is considered from the perspective of the grid peak adjustment. For the backup capacity, the target of the Residential Energy Storage System should be small and small in the load fluctuations and small peak valley. ② When Residential Energy Storage System is an implementation of the subject or a third -party investor, the target of the Residential Energy Storage System has become electricity saving and maximum arbitrage. The current Residential Energy Storage System peak -cutting control strategies are mostly targeting the minimum load fluctuation and assisting economic analysis, thereby achieving optimization management of the Residential Energy Storage System.

2. Improve power supply reliability and power quality

In order to prevent the economic loss of important users of the power system at the grid failure or power outage, the Residential Energy Storage System that configures a certain capacity can effectively improve the reliability of power supply. In addition, Residential Energy Storage System can achieve efficient and fast work and non -meritorious control, rapid response system disturbance, adjusting frequency and voltage, compensation load fluctuations, improving the stability of the system, and improving the quality of electrical energy.

3. FM

  Residential Energy Storage System, especially battery energy storage technology, has the advantages of fast response speed and two -way adjustment capabilities, which are more efficient than traditional frequency regulation methods. However, due to the economic constraints of the Residential Energy Storage System, the capacity of the battery Residential Energy Storage System is smaller than that of traditional frequency adjustment power supply. Therefore, the residential Energy Storage System participation in the system is generally combined with the traditional frequency adjustment power supply. In terms of frequency adjustment of energy storage participation systems, some documents have studied the control strategy of frequency regulation of the Residential Energy Storage System Auxiliary Convention Unit, mainly using improved drooping control methods. Residential Energy Storage System can also combine a frequency adjustment capacity of wind power units with wind power. In this mode, the wind field will be reduced accordingly. In terms of the secondary frequency adjustment of energy storage participation systems, in the traditional frequency adjustment, the problem of slow response speed of thermal power crew, low unit climbing rate, etc., mainly from the perspective of Residential Energy Storage System to assist FM, proposes fuzzy control, genetic algorithm, sensitivity of fuzzy control, genetic algorithms, sensitivity The analysis of Residential Energy Storage System participates in frequency adjustment control methods, thereby improving the power grid frequency regulation performance.