Abstract:Low frequency load shedding requires high timeliness and accuracy in load regulation. During the process of load reduction, there are phenomena of under cutting and over cutting. At the same time, load regulation involves a large number of users, which brings inconvenience to users. Load reduction can also affect the normal operation of equipment. In response to the above issues, this article proposes a low-frequency load shedding hierarchical adjustment strategy based on user load characteristics. This strategy takes the minimum deviation in load regulation and the minimum proportion of load shedding users as optimization objectives; By setting important level labels for user loads with different characteristics such as high pollution and high energy consumption, the proportion of users participating in load reduction can be adjusted to ensure the normal operation of normal user loads. In addition, this article designs an execution mechanism for a low-frequency load shedding system based on a load control unit, which solves the timeliness and accuracy issues of low-frequency load shedding by issuing adjustment strategies to the load control unit in advance. This article analyzes the rationality of the low-frequency load shedding control strategy through simulation, and achieves a lower control error of 0.87% on average per round. The average proportion of users participating in load shedding in each round is 45%, meeting the expected goals of more advanced monitoring, more timely load shedding, and more accurate control.