Affiliations: [a]
Metrology Center of Yunnan Power Grid Co., Ltd., Kunming, P.R. China | [b] Faculty of Civil Aviation and Aeronautical, Kunming University of Science & Technology, Kunming, P.R. China | [c] Faculty of Power Engineering, Kunming University of Science & Technology, Kunming, P.R. China | [d] Faculty of Mechanical and Electrical Engineering, Kunming University of Science & Technology, Kunming, P.R. China
Correspondence:
[*]
Corresponding author. Nan Pan, Faculty of Civil Aviation and Aeronautical, Kunming University of Science & Technology, Kunming 650500, P.R. China. Tel.: +86 15808867407; E-mail: 15808867407@163.com.
Abstract: In distribution networks with distributed power supplies, distributed power supplies can also be used as backup power sources to support the grid. If a distribution network contains multiple distributed power sources, the distribution network becomes a complex power grid with multiple power supplies. When a short-circuit fault occurs at a certain point on the power distribution network, the size, direction and duration of the short-circuit current are no longer single due to the existence of distributed power, and will vary with the location and capacity of the distributed power supply system. The change, in turn, affects the current in the grid, resulting in the generation and propagation of additional current. This power grid of power electronics will cause problems such as excessive standard mis-operation, abnormal heating of the converter and component burnout, and communication system failure. It is of great and practical significance to study the influence of distributed power in distributed power distribution networks.
Keywords: Distributed power, distribution network, malfunction, harmonic, power electronics
