Optimal configuration of diversified energy storage for renewable energy peak regulation and frequency response

Abstract

 Faced with the uncertainty and volatility that large-scale integration of 
renewable energy brings to the power grid, implementing combined electricity
heat scheduling within the park is highly beneficial. Therefore, a comprehensive 
energy storage configuration method is proposed for the park based on various 
types of energy storage resources, which includes wind turbine (WT), 
photovoltaic unit (PV), electro-chemical energy storage (ECES), and solid-state 
electric thermal storage (SETS). To maximize the profit of the park, revenue from 
the electricity market, ancillary services, and capacity market is considered to 
develop a configuration method and profit, while calculating investment and 
operation costs. Compared with traditional methods, four different configuration 
scenarios are selected for simulation calculations based on energy spatiotemporal 
conversion characteristics, and energy storage facilities with ancillary service 
capabilities can effectively improve the park's economy. STES cannot obtain 
sufficient revenue under the current pricing mode. However, the combined 
electric-heat energy storage can increase the flexibility of the park, its economic 
feasibility still needs to be judged based on the actual situation.