Distributed voltage control of active distribution network based on global sensitivity and ADAM

With the development of distributed photovoltaic and energy storage,the characteristics of "source-charge interaction"in radial distribution network are becoming more and more obvious, and it is gradually developed into active distribution network(ADN). The problem of voltage crossing due to power imbalance becomes more and more frequent and cannot be ignored. Most of the existing studies on the voltage control of active distribution network tend to have a single control target without taking into account various regulatory objectives. They ignore the collaborative regulation of multiple flexible resources, and there are problems such as failing to make full use of the adjustment capacity of multi-energy energy storage at the user side. Due to the problems of solving dimension explosion and invading user privacy in centralized voltage control, a distributed voltage control method based on global sensitivity, distributed gradient tracking and ADAM is proposed in this paper. Firstly, an improved DistFlow power flow model and a Back-and-Forth communication framework are established to lay a foundation for real-time calculation of global sensitivity and internetwork flow. Secondly, all kinds of global sensitivity calculation methods and voltage control flow based on global sensitivity are analyzed and obtained. Finally, the distributed gradient tracking method and ADAM method are combined to optimize the control process, and finally the voltage of the distribution network throughout the day is basically kept within the safe range.