Optimal Configuration of Positioning Device Based on Single-End and Double-End Fusion Positioning

Abstract

For areas with low degree of automation, traveling wave location devices are added to improve the reliability of power supply. Considering the high cost of traveling wave location devices, this paper proposes an optimal configuration method of fault traveling wave location device based on single and double fusion location. First, the distribution network is layered by using graph theory knowledge to obtain a complete T-shaped branch structure. Through the analysis of different T-band branch structures by the method of single-end and double-end fusion positioning, the principle of device layout optimization is obtained, and then the device optimization configuration of the whole distribution network is carried out. Finally, the process of single-end and double-end fusion positioning of the distribution network after device optimization configuration is analyzed. Directly adopting a two-terminal location method based on line mode components for a line provided with a traveling wave location device, and firstly carrying out a priori test on the line without the traveling wave location device to obtain a fitting curve of zero line mode time difference and fault distance,Then the location distance is calculated by combining multi-point devices and the accurate location result is obtained by averaging. Finally, the feasibility of this scheme is verified by PSCAD simulation analysis, which can not only reduce the number of traveling wave location devices installed in the network and save investment, but also ensure the reliability of fault location in the whole distribution network.