1.杭州电子科技大学自动化学院，浙江省杭州市 310018;2.国网浙江省电力有限公司电力科学研究院,浙江省杭州市 310014
1.School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China;2.Electric Power Research Institute of State Grid Zhejiang Electric Power Co., Ltd, Hangzhou 310014, China
This work is supported by National Natural Science Foundation of China (No. 51677047).
Situation awareness visualization is a core technology for monitoring and management of low-voltage distribution network (LVDN), therefore, a new concept of transformer centralized low-voltage distribution network (TCDN) is suggested as an object and target to guide corresponding research and engineering application. Auto-generation of a clear and beautiful phase-separated connection diagram becomes a pre-condition for situation awareness visualization. Wiring asymmetry and load asymmetry are core characteristics of LVDN, two types of situation-oriented connection diagrams are designed. A auto-generation principle is proposed for phase-separated connection diagram of TCDN, so that not only the connection symmetry of three-phase four-wire main branches as well as the connected three-phase customers have been promised, but also the connection asymmetry caused by single-phase two-wire customers can be clearly perceptible. For the defined whole phases virtual connection diagram, based on the provided parameters of layout in pan-shape and the arrangement order of each wiring harnesses, the initial layout and routing algorithm for each wiring harness and assembling all of them by in-out zooming and rotating algorithm have been proposed to yield an initial diagram, followed by further beautifying algorithm to generate a nice connection diagram. The generated virtual whole phases connection diagram will be finally disassembled into the phase-separated connection diagrams according to the proposed auto-generation principle. The case study proves the efficiency and affectivity of proposed algorithm, moreover, the time sequence pictures of voltage profile based on the generated phase-separate connection diagram show a very good perceptible understanding of dynamic operation characteristics of TCDN dynamically caused by power outputs from single-phase household photovoltaics and power assumptions from single-phase and three-phase load changes.
ZHANG Jianmin,XIA Yan,NI Linna,et al.Auto-generation of Phase-separated Connection Diagram for Asymmetry Perceptible Low-voltage Distribution Network[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190627003.