College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
DC distribution mode has the advantages of high power supply capacity, low loss and flexible control. With the continuous maturity of power electronic technology, AC/DC hybrid distribution network gradually becomes a new research hotspot and development trend. An economic evaluation model for DC transformation of urban distribution network considering high-density load and distributed generator(DG)supply is proposed. The calculation model of minimum installation capacity and its optimal control strategy are used to optimize investment cost and operation cost. In the model, the impairment income caused by the change of DG output curtailment, load shedding and operation cost is considered. In multiple scenarios, the technique of DC transformation is compared with other transformation methods. The influence of DG penetration and DC load ratio on investment economy of DC transformation is also analyzed. The simulation results verify the effectiveness of the proposed economic evaluation method. It also shows that the proposed DC transformation scheme has technical and economic feasibility when the power supply capacity and DG consumption capacity of network are highly required.
|||XU Biao, TANG Wei, ZHANG Lu, et al. Economic Evaluation Method for Multi-scenario DC Transformation of Active Distribution Network[J]. Automation of Electric Power Systems,2019,43(23):50-57. DOI:10.7500/AEPS20190513003|