Abstract
DC distribution network has a fabulous future due to the advantages of high reliability, strong power supply capacity, long power supply distance, and obvious economic advantages. However, there are few research on the study of DC distribution network voltage sequences, considering the accommodation of traditional AC distribution network. Therefore, this paper proposed a reasonable DC distribution network voltage sequence based on the study of AC distribution accommodation and renewable energy access. Firstly, a method for constructing a DC distribution voltage sequence was proposed based on a typical scenario of a harmonious urban DC distribution network. Secondly, the DC low-voltage sequences were determined according to the survey and development. Moreover, a comprehensive evaluation model for the medium voltage level was established, accounting for the economy, power supply capacity, reliability, and adaptability. Finally, the rationality of the proposed voltage level sequence ± 0.048kV/0.19kV /0.38kV /0.75kV /1.5kV /10kV was validated by a reasonable constraint.
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