GUO Lu, ZHANG Guangdong, LIU Kang, et al. Fast Calculation Method of Two-phase Compensation for Voltage Unbalance of 750 kV Transformer[J]. High voltageapparatus, 2023, 59(1): 102-108.
GUO Lu, ZHANG Guangdong, LIU Kang, et al. Fast Calculation Method of Two-phase Compensation for Voltage Unbalance of 750 kV Transformer[J]. High voltageapparatus, 2023, 59(1): 102-108. DOI: 10.13296/j.1001-1609.hva.2023.01.015.
750 kV transformer is the key equipment to ensure the normal operation of the backbone grid of northwest power system
but the voltage unbalance often occurs after replacing one phase transformer. The analysis and calculation model of voltage unbalance was established considering the influence of capacitance of between windings and windings to ground;A fast iterative calculation method of two-phase capacitance compensation was proposed to determine the compensation phase and the corresponding compensation capacitance; for the voltage unbalance of tertiary winding of 750 kV transformer
the capacitance compensation scheme was designed by using the fast iterative calculation method
and the effectiveness of this calculation method was verified by simulation. The fast iterative calculation method proposed in this paper can quickly determine the two-phase capacitance compensation scheme and compensation capacitance
which greatly improves the speed and reliability of solving voltage imbalance on site.