Impacts of merit order based dispatch on transfer capability and static voltage stability

In this paper, the goal is to investigate the impacts of generation merit order based dispatch on transfer capability and static voltage stability. The concept of generation merit order can be based on traditional costs or market bids. The new merit order feature has been incorporated into the existing Continuation Method Trace Tool (CMTRACE). More specifically, the well-known continuation power flow problem is reformulated to take into account the merit order effect of dispatching generators on the static P-V curve, given a power system operating point, a load demand forecast and a table of generation MW blocks and prices. The modeling difficulties in dealing with sequentially ordered generation block dispatches, such as exact transition point search and solution time, are efficiently solved. The numerical results on two case studies of a 3493-bus system show that the merit order of dispatching generation has significant impacts on the P-V curve and the simulation time.