Voltage Warning Assessment and Optimization Adjustment Based on Dynamic Power Flow Analysis

With the access of various types of intermittent energy, distribution network begins to face many problems, such as the enhancement of uncertainty, the increasement of power disturbance and the change of dynamic characteristics for continuous changing power flow. In this context, how to properly assess the voltage risk in distribution network and identify the potential critical risk items that can cause adverse effects on voltage has become a significant challenge. This paper uses dynamic power flow analysis based on the fusion of cyber and physics to reveal the complex properties of distribution network operations. A risk assessment model based on former dynamic power flow is also discussed for real-time assessment of voltage risk in distribution network. When the network is under warning state, the voltage optimization adjustment method will be used for voltage recovery based on the types of voltage risk and state transition rules for safe operation. This method can guarantee an efficient operation for distributed generations and improve the reliability of power supply.