It has become a trend that large scale renewable energy power generation systems are connected to the receiving end grid of HVDC transmission systems. However

there is limited research on suppressing subsequent commutation failure in HVDC systems under such scenarios. First

in view of the scenario of PV connecting to the receiving end of LCC AC grid

the relevant mechanisms of subsequent commutation failure induced by PV after an AC fault are analyzed. It is found that after the initial commutation failure recovery

LCC experiences oscillations in the firing angle command due to PV output fluctuations. To address this

a subsequent commutation failure suppression strategy based on the suppression of inverter control command oscillations is proposed. By introducing additional current and extinction angle deviations into the constant current control and constant extinction angle control

the proposed method alleviates oscillations in the firing angle command. Finally

PSCAD/EMTDC simulations under different PV installation capacities

connection distances

and fault locations validate the effectiveness of the proposed suppression strategy.