Distributed Multi-Area Economic Dispatch Considering Reactive Power Using Critical Region Projection

The growing tight interconnections between regional power systems brings about the critical need to coordinate multi-area economic dispatch. Because of the limitations on private data exchange and model management, it is suitable to address the multi-area economic dispatch problem in a distributed manner. In this paper, the linearized AC power flow model is used to consider the reactive power to make the dispatch more accurate. The dispatch model is decomposed into regional sub-problems and the coordinator’s problem by using the boundary phase angles and voltage amplitudes as coupling variables. In order to handle the multi-parametric programming, a critical region projection method is used to obtain high-quality solutions with finite convergence. Numerical tests on multi-area interconnected systems are conducted to show the excellent computational performance and the more accurate solution of the proposed method.