Model-free Voltage Control for Flexible Distribution Networks With Measurement Uncertainty

The high permeability access of distributed generations DGs may lead to voltage violations in flexible distribution networks (FDNs). The development of flexible interconnection equipment represented by soft open point (SOP) in FDN has provided a solution for voltage violation alleviation. However, the traditional control method is based on the physical model, which is difficult to adapt to the practical complex operating environment of FDN. Thus, it cannot guarantee optimal performance. Enabled by sufficient operational data from the real-time measurement and communication systems, the application of model-free voltage control methods is expert in adaptiveness. However, data quality problems such as data loss and data delay harm the control performance. Therefore, this paper proposes a model-free voltage control method of SOP with a data compensation mechanism. Firstly, the measurement data uploaded by FDNs is judged whether lost or not, and the data in the data vault is used to compensate for the missing data. Then the data model of FDNs with SOP is established by the model-free voltage control method, and the voltage control strategies of SOP are iteratively solved. Finally, the effectiveness of the proposed method is validated on the IEEE 33-node power system.