The Economic Analysis of Energy Storage Large-Scale Application Based on Equal Demand Substitution

Based on equal demand substitution principle, the cost and profit of energy storage equipment owner and power system was analyzed by the scenario of stored energy was large-scale applied in distribution gird, the breakeven analysis method for energy storage equipment owner and power system operator was proposed, break-even point and feasible break-even area of energy storage equipment owner and power system was computed. The analysis result indicates, the large-scale stored energy application in distribution gird is infeasible, but as the rapid declines of energy storage cost and the rapid promotion of energy storage technology, the grid level large-scale application of energy storage will be economical.