Peak regulation income of Praia Energy Storage Power Station

Here, we focused on this subject while conducting our research. The multi-timescale regulation capability of the power system (peak and frequency regulation, etc.) is supported by flexible resources, whose capacity requirements depend on renewable energy sources and load power uncertainty characteristics.

Relationship between the RE penetration, ES power, and confidence in satisfying. Energy storage (ES) can mitigate the pressure of peak shaving and frequency regulation in power systems with high penetration of renewable energy (RE) caused by uncertainty and inflexibility.

Taking the 49.5% RE penetration system as an example, the power and capacity of the ES peaking demand at a 90% confidence level are 1358 MW and 4122 MWh, respectively, while the power and capacity of the ES frequency regulation demand are 478 MW and 47 MWh, respectively.

Although ES has a fast power creep rate, its total storage capacity is limited. In order to reasonably determine the storage capacity and give full play to the charging and discharging capacity of ES, it is necessary to make the configured ES capacity as close as possible to the charging and discharging capacity throughout the assessment period.

In addition, using the example of four RE penetration scenarios of 30%, 40%, 50%, and 60%, it was also determined that as the penetration of RE increases, the proportion of ES demand power to the total installed system capacity and endurance demand of ES also increases. Nevertheless, this study has some limitations in actual power systems.

As can be seen in Table 8, both the demands of power and capacity of ES are increasing as penetration of RE rises.