**5. Conclusions**

In this paper, semiconductive layers with di fferent contents of LSC were prepared by melt blending. The appearance and resistivity of the nanocomposites and their e ffects on space charge injection of insulating layers were studied. The conclusions are drawn as follows:

1. When the LSC content in the semiconductive composites is low, the nanoparticles are uniformly dispersed in the matrix, and when the content of the nanoparticles increases, agglomeration occurs.


**Author Contributions:** Conceptualization, C.H. and Y.C.; methodology, H.Y.; software, X.G. and S.Z.; validation, Y.W., G.L. and M.X.; writing—original draft preparation, Y.C.; writing—review and editing, C.H. and Y.C.; funding acquisition, Q.L. and Z.X. All authors read and agreed to the published version of the manuscript.

**Funding:** This research was funded by [the State Key Laboratory of Advanced Power Transmission Technology] gran<sup>t</sup> number [SGGR0000DWJS1800561] and [State Grid Shandong Electric Power Research Institute] gran<sup>t</sup> number [SGSDDK00KJJS1900329].

**Acknowledgments:** This research was funded by [the State Key Laboratory of Advanced Power Transmission Technology] gran<sup>t</sup> number [SGGR0000DWJS1800561] and [State Grid Shandong Electric Power Research Institute] gran<sup>t</sup> number [SGSDDK00KJJS1900329].

**Conflicts of Interest:** The authors declare no conflict of interest.
