Economic Dispatch for Power Systems with Wind and Solar Energy Integration Considering Reserve Risk

With the higher penetrations of wind power and photovoltaic power in systems, the randomness of their output adds amounts of uncertainty to system generation planning and scheduling. This paper defines the risk indices of spinning reserve which measure the tension level of system spinning reserve on the basis of temporal characteristic of the forecasting output of wind and photovoltaic power modeled as scenario trees. Then, the economic dispatch model considering risk indices of spinning reserve and interruptible load regarded as spinning reserve to improve the system economy is formulated. The proposed model is solved by Cplex. Finally, the simulation example of system composed of 10-units proves the validity of the model.