A novel decentralized method of multi-area security constraint economic dispatch

This paper presents a novel decentralized mode of Multi-Area Security Constraint Economic Dispatch(MSCED). In fact, there are the power flow limits of tie-lines, the majority of local units satisfy their local load, and only a few units participate in the inter-regional power balance. Based on such reasons, original MSCED can be decomposed into several independent subproblems, for sub area dispatch center and coordination problem for dispatch center. On the basis of this mode, the mathematical models of subproblems and coordination problem are proposed respectively. In order to reduce the calculating time, the method to reduce the constraints and variables of coordination problem is also proposed. Test results from the application of the method to the two-area RTS-96 system are reported.