Abstract: Due to the commutation failure of high voltage direct current (HVDC) system and the nonlinear response of HVDC control, the electrical characteristics of high voltage alternating current (HVAC) overhead transmission lines on inverter side after occurrence of single-phase ground faults are different from those of pure HVAC system. After the single-phase tripping of AC overhead transmission line at inverter side, the amplitudes and the phases of power frequency voltage and transmission line current of the non-fault phase of commutation bus may still fluctuate for a short time, while there is hardly any fluctuation in the pure AC system.Therefore, we analyzed the influences of the electrical characteristics of the inverter side HVAC system on the recovery voltage of open phase after single-phase trip. Then, we investigated the applicability of traditional adaptive single-phase reclosure criterion to HVAC overhead transmission lines on the inverter side. The results show that, due to the fluctuation of power frequency recovery voltage at the initial stage of tripping, some traditional criteria cannot accurately identify the fault nature. To solve the problem above, an improved strategy of adaptive single-phase reclosure criterion for inverter side HVAC overhead transmission lines is proposed. The simulation results based on the PSCAD/EMTDC verify the correctness of the analysis and the effectiveness of the improved strategy.