*Review* **Smart Distribution Network Situation Awareness for High-Quality Operation and Maintenance: A Brief Review**

**Leijiao Ge 1,\*, Yuanliang Li <sup>1</sup> , Yuanliang Li <sup>2</sup> , Jun Yan <sup>2</sup> and Yonghui Sun <sup>3</sup>**


**Abstract:** In order to meet the requirements of high-tech enterprises for high power quality, highquality operation and maintenance (O&M) in smart distribution networks (SDN) is becoming increasingly important. As a significant element in enhancing the high-quality O&M of SDN, situation awareness (SA) began to excite the significant interest of scholars and managers, especially after the integration of intermittent renewable energy into SDN. Specific to high-quality O&M, the paper decomposes SA into three stages: detection, comprehension, and projection. In this paper, the stateof-the-art knowledge of SND SA is discussed, a review of critical technologies is presented, and a five-layer visualization framework of the SDN SA is constructed. SA detection aims to improve the SDN observability, SA comprehension is associated with the SDN operating status, and SA projection pertains to the analysis of the future SDN situation. The paper can provide researchers and utility engineers with insights into the technical achievements, barriers, and future research directions of SDN SA.

**Keywords:** smart distribution network; situation awareness; high-quality operation and maintenance; critical technology; comprehensive framework
