Hierarchical Control Method of AVC Reactive Power and Voltage in 110 kV Substation Based on Two-Level Reactive Power Optimization

The conventional hierarchical control architecture of AVC reactive power and voltage in 110 kV substation is generally single-layer processing, and the control efficiency is low, which leads to the expansion of the fluctuation range of the final AVC reactive power and voltage. Therefore, the design, verification, and analysis of the hierarchical control method of AVC reactive power and voltage in 110 kV substation based on two-level reactive power optimization are proposed. According to the actual control requirements and changes in standards, the voltage stability factor index is determined first. Multi objective method is adopted to improve control efficiency. Multi objective AVC reactive power and voltage hierarchical control framework is designed, and two-level reactive power optimization AVC reactive power and voltage hierarchical control model is constructed. Reactive power compensation processing is used to achieve voltage control. The final test results show that after the comparison of three hierarchical control forms, the secondary reactive power optimization P/V control method controls the fluctuation range of reactive power voltage of G110kV substation to below 40 kV, which indicates that this control method is more flexible, more targeted, and faster, with practical application value.