Scheduling Method of Active Distribution Network Based on Sensitivity Analysis

As one of the solutions to address the shortage of fossil fuels, distributed generators (DGs) have been widely integrated into active distribution networks (ADNs). It inevitably brings challenges such as trend reversal and voltage violation. At the same time, the role of users is constantly changing from consumers to prosumer. The complex distribution of power flow poses higher requirements for dispatchers of ADNs. Therefore, considering the diversifying the types of participants in ADNs, it is necessary to conduct effective state evaluation for ADNs and generate scheduling plans for dispatchers. Sensitivity analysis method can effectively analyze the impact of different devices on the operation status of ADNs, while reducing the amount of data requirement and improving calculation speed. The explicit relationship between evaluation indicators of ADNs and the output of devices can be constructed, in which reason sensitivity analysis method can effectively assist dispatchers in formulating scheduling plans. In this paper, a steady-state model of ADNs is constructed in scenarios when multiple types of controllable devices are connected. Based on linearized power flow, the mapping relationship between operation schemes of devices and system operation status are proposed. Indicators such as economy and flexibility indexes are further elaborated. Finally, an analysis is conducted on the modified IEEE 33-node test system to validate the effectiveness of the proposed method.