Grid-Side Energy Storage System for Peak Regulation
In this paper, the relationship between the economic indicators of an energy storage system and its configuration is first analyzed, and the optimization objective function is formulated.
The energy storage system can participate in power system peak and frequency modulation. However, the energy storage system cannot participate in the trade of multiple power system varieties on the user side, nor can it provide localized power supply reliability guarantees for various regions.
Because of the rapid development of large-capacity energy storage technology and its excellent regulation performance, utilizing energy storage systems for frequency and peak regulation becomes a popular research topic [7, 8].
When neither energy storage nor the thermal power plant can meet the demand for peak regulation, wind power will generate more wind abandonment power, and the overall capacity deviation at the last moment of electric vehicle charging will be smaller. TABLE 5. System peak regulation results in different scenarios.
At present, most energy storage technologies have higher capital costs than peaking power alternatives such as gas turbines (flywheels are similar in capital cost to a combined-cycle natural gas turbine, and NaS batteries are 1.8 to 3.5 times the capital cost of an NGCC unit).
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