An optimal scheduling model for independent AC/DC hybrid microgrid considering operation characteristics of energy storage(ES)is proposed. Due to the nonlinear relationship between ES loss and state of charge(SOC)

a method using linear functions to approximate the nonlinear characteristics of ES loss is raised in order to calculate ES loss cost accurately and solve the optimal model simply. Initial/final SOC of ES can affect its charging and discharging capability

thus initial SOC acts as an improved variable to search the optimal value

which can improve the economic benefits of microgrid operation. Then

a case study shows that proposed ES loss model is more accurate and the solution is accelerated after transforming the optimal problem into a quadratic programming problem. Optimization of initial SOC can maximize the ability of transferring electricity for ES

and reduce the phenomena of abandoning wind/solar energy and shedding loads in isolated microgrid. Finally

results verify the rationality and validity of the optimal scheduling model.