Voltage Control Strategy Considering Security Constraints of Predictive Fault Set

With the development of AC/DC hybrid power grids and a high proportion of new energy sources, grid operation risks have increased. The voltage constraints in traditional automatic voltage control systems are generally given offline, which may not be able to meet the requirements of security and stable operation of the actual voltage of the power grid. It is necessary to comprehensively consider the voltage security region under grid fault to support the security and stable operation of the grid. This paper proposes a voltage control strategy that considers the voltage security region of the predictive fault set. Through the defined predictive fault set, analyze and evaluate the voltage operation risk under the fault, add voltage security region to the existing voltage control model to ensure that the voltage is qualified and security, reduce the voltage risk at the time of fault, and realize the active control of the voltage. Finally, through simulation analysis, the effectiveness of the proposed method is verified and it has a certain promotion value.