Abstract
Aiming at the problems of low power supply reliability, poor transfer capacity between stations, and low line utilization in the current distribution network, this paper proposes a diamond-shaped distribution network structure with a clear structure. First, we investigated the typical wiring patterns of medium-voltage distribution networks in Tokyo, Japan, Paris, France, and China’s developed cities, and summarized experience and shortcomings. Secondly, combining the typical wiring patterns of distribution networks in China and abroad, construct a diamond-shaped distribution network structure, and study its adaptability, safety and flexibility, power supply reliability, and economy. Finally, take the transformation of the wiring mode of a regional distribution network in a certain city as an example, compare the use of the diamond-shaped distribution network structure in this article with the use of cable double-ring network wiring, cable “double petal” wiring, and Shanghai diamond-type wiring distribution network grid reconstruction The effect verifies the superiority of the diamond-shaped distribution network structure in this paper.
Highlights
The optimization of the distribution network grid structure is the core content of the distribution network planning and transformation
The cable “double petals” connection in Xiong’an New Area has high power supply reliability, 100% load transfer capacity, and line utilization rate up to 75%
In order to solve the above-mentioned typical problems of the distribution network structure, this paper proposes a clear structure of the diamond-shaped distribution network structure, and comprehensively analyzes the diamond-shaped mode of this paper from the aspects of adaptability, safety and flexibility, power supply reliability, and economy
Summary
The optimization of the distribution network grid structure is the core content of the distribution network planning and transformation. The wiring mode reflects the basic situation of the grid structure. The choice of wiring mode has a significant impact on the reliability, economy, and applicability of the distribution network construction. Load transfer capacity (Feng et al, 2015; Zhao and Wu, 2016) is insufficient, and the 10kV line utilization rate (Zhang and Dou, 2018; Xiao and She, 2019) is generally low. Experts and scholars have done a lot of research on the wiring mode of the distribution network. The 22kV cable three-shot connection in Tokyo, Japan has a high line utilization rate, but the load transfer and balance capacity between stations is insufficient
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