The utility model provides a pair of wind -powered electricity generation subsynchronous oscillation restraint system, including monitor cell, with processing unit that monitor cell connects, with processing unit communication connection's remote monitoring unit and with processing unit connects is used for restraining subsynchronous oscillation's execution unit, execution unit is including setting up compensation suppression circuit in the parallel -series connection of electric wire netting side in the electric wire netting, setting up in the rotor converter of aerogenerator outlet side, being used for the pitch control ware of control fan pitch and setting up in the active ripples ware that hinders of aerogenerator outlet side, control end that compensation suppression circuit, rotor converter, pitch control ware and active hinders the ripples ware all with processing unit connects, can carry out effectual suppression to the subsynchronous oscillation in the wind -powered electricity generation, effectively prevent to ensure the continual and steady operation of wind power system because the fan that subsynchronous oscillation arouses takes off the perhaps phenomenon emergence of equipment damage of net.