Research on distribution network reconfiguration based on microgrid
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ORIGINAL RESEARCH
Research on distribution network reconfiguration based on microgrid Xuejie Wang1,2 · Yanchao Ji1 · Jianze Wang1 · Yang Gao2 · Lei Qi3,4 Received: 3 May 2019 / Accepted: 3 October 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2019
Abstract Micro-grids have been considered as a vital part of power system. The distribution system is gradually showing the characteristics of multi-source initiative. The distribution network reconfiguration with microgrid changes the topology of the network by controlling the state of the switch, and optimizes the predetermined indicators under the premise of safe, economic and stable operation. This paper describes a hierarchical distribution network reconfiguration strategy with microgrid, which can reduce the number of operation of the switch and the network loss. This strategy ensures rapid power supply recovery. In the process of reconstruction, this paper uses the immune clonal selection differential evolution algorithm. The simulation examples are included to display the performance of the proposed method.
1 Introduction With the development of technology, the proportion of micro-grids in the distribution network will gradually increase. The micro-grid brings new challenges to the reconstruction of the distribution network. First, the microgrid is connected to the feeder of the distribution network through the controllable power electronic device. When the power is normally supplied, microgrids run in parallel with the distribution network. Lasseter and Paigi (2004) have proposed that the microgrid can be used as the load of the system, absorbing electric energy from the distribution network, as well as the system emergency power supply. Microgrids can supply electric energy to the grid according to actual demand, with the characteristics of fast and efficient controllability. After the distribution network fails, either the microgrid is in the operation of island, or it uses the distributed power supply of the microgrid and the rapid response capability of the energy storage device to adjust its output * Xuejie Wang wangxuejie‑[email protected] 1
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
2
School of Electric Power, Shenyang Institute of Engineering, Shenyang 110136, China
3
School of Electrical Engineering, Shenyang University of Technology, Shenyang 110178, China
4
Liaoning Provincial Institute of Safety Science, Shenyang 110004, China
power to supply first-level load in the distribution network upstream of the access point. Emergency power supply reduces the scope of power outages to a certain extent. However, many studies have been carried out on a single type of distributed power supply. In practical applications, there are problems such as random fluctuation of output power and difficulty in control, which greatly limits its positive role in power supply restoration. At the same time, Prasad et al. (2005) have described that the existing research has neglected the impo
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