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Comprehensive approach for hybrid AC/DC distribution network planning using genetic algorithm

2017; Institution of Engineering and Technology; Volume: 11; Issue: 16 Linguagem: Inglês

10.1049/iet-gtd.2016.1293

1751-8695

Ali Ghadiri, Mahmoud‐Reza Haghifam, Sayyed Majid Miri Larimi,

Optimal Power Flow Distribution

The neoteric AC/DC distribution networks are becoming more practical and cost-effective for several reasons such as high penetration of DC distributed generations (DGs) and also ever-increasing growth of sensitive DC electronic loads. Using these networks eliminates some required conversion stages which result in reduced costs and better power quality and reliability. This paper evaluates the economic efficiency of hybrid AC/DC distribution systems compared with conventional AC ones. For this purpose, a conceptual methodology for AC/DC distribution system planning is developed for making a fair comparison between AC and AC/DC distribution systems costs. The proposed methodology determines the optimal AC/DC distribution substation location and size and AC/DC feeder routing, as well as length and capacity of AC/DC feeders in both low-voltage and medium-voltage sides. The cost function comprises of investment and operational costs, including costs of construction, reliability, and loss. The proposed AC/DC planning approach is implemented in a region with no pre-assigned distribution system in different cases, and results are compared in both AC and AC/DC planning scenarios. Numerical results reveal that using hybrid AC/DC distribution systems in comparison with commonly used AC ones can lead to reduced total costs in the presence of sensitive loads and also high penetration of DGs.