Frequency conversion energy storage generator black technology

The combination of energy storage system and new energy unit to realize black start can effectively supplement the amount of black start power and make it possible for parallel recovery of black start, which can effectively improve the black start response efficiency and reduce power outage time.

Li et al. proposed to use a photovoltaic (40 MW)-battery energy storage system (15 MW/5.5 MWh) (denoted as PV-BESS) as a black start re- source for restoration, with the black start process as shown in Fig. 7.

Comparison results indicate that the bat- tery energy storage-based black start service has relatively low capacity in supply resilience (e.g., short restoration peri- od) but shows advantages in grid formation, reactive power support, and frequency and voltage control. Table 1.

Other energy storage methods have the potential to be utilized for black start services (e.g., flow battery and FES have quick re- sponse times, HT-TES has high energy density, LASE has 100% depth of discharge, and CAES has large storage capa- city and high power capacity).

Black-start generators are the key grid-forming generators when restoring the system from a blackout. As the black start is successful, other generators then synchronize to the grid before injecting current.

When energy storage-assisted wind farms participate in the black start as black start power supply, research on capacity configuration methods and schemes of the energy storage system can effectively reduce the configuration cost of battery energy storage, which is of great significance.