A Planning Method of New Energy Integration System with Multi-Circuit DC in Continuous Cost

Multi-circuit direct current (MCDC) is one of the effective methods to solve the large-scale grid-connection problem of new energy. When planning the new energy access system with MCDC, the combination of site selection and constant capacity makes the planning a nondeterministic polynomial problem (NP-hard). According to the continuous output curve of new energy, this paper quantifies the annual power consumption and power discard, and puts forward the access system planning model of multi-cluster new energy through gathering stations and multi-return dc grid-connection under the economic optimal target. The profit of each cluster is discussed, and the mathematical relationship between the location of the collecting station and the new energy access capacity is found when the cost is continuous. Finally, the complex planning with capacity and coordinates is transformed into the ferma-weber (f-w) site selection problem of pure coordinate planning and solved by iteration. An example is given to demonstrate the effectiveness and rapidity of the proposed method.