Research on Security Region of a Real Urban Distribution Network

This paper presents an empirical research on the existence of Distribution System Security Region(DSSR). Firstly, a distribution network covers 4.82km
²
with distribution automation is selected in core urban area of Tianjin to calculate the security boundary of the network, and then the existence of the security boundary is further verified in network operation. Secondly, the security analysis of summer peak load data is carried out based on DSSR, and the results are compared with the existing security analysis reports. The comparison shows that the calculated security boundary accurately reflects the N-1 security operating range of the distribution network, and the analysis results for the summer heavy load are also consistent with the actual situation.