A auxiliary steam supply system in a solar operated power plant, the system comprising: a solar receiver to heat steam flowing therethrough, the solar receiver comprising a superheater section comprising a plurality of superheater panel arrangements (120a-120d); a turbine operable on the steam received from the solar receiver flowing through the plurality of superheater panel arrangements (120a-120d);; a steam circuit enabling the steam flow from the solar receiver to the turbine through the plurality of superheater panel arrangements (120a-d), to operate the turbine; a thermal energy storage arrangement having a thermal energy storage medium, the thermal energy storage arrangement configured to the steam circuit to receive a predetermined portion of the steam from the steam circuit to heat/charge the thermal energy storage medium, wherein the thermal energy storage arrangement is capable of receiving the steam to heat the thermal energy storage medium from at least, at an exit of the plurality of superheater panel arrangements (120a-d) prior to the turbine, and at desired locations in-between plurality of superheater panel arrangements (120a-d); and an auxiliary steam circuit configured to circulate an auxiliary steam flow, the auxiliary steam circuit configured to thermally communicate with the thermal energy storage arrangement to enable the auxiliary steam flow to be heated/discharged from the thermal energy storage medium and introduced into the plurality of superheater panel arrangements (120a-d); to attain predetermined conditions thereof, wherein the auxiliary steam flow is adapted to be introduced into the receiver superheater section at least, at the exit of the plurality of superheater panel arrangements (120a-d) prior to the turbine, and at suitable locations in-between the plurality of superheater panel arrangements (120a-d). a solar receiver to heat steam flowing therethrough, the solar receiver comprising a superheater section comprising a plurality of superheater panel arrangements (120a-120d); a turbine operable on the steam received from the solar receiver flowing through the plurality of superheater panel arrangements (120a-120d);; a steam circuit enabling the steam flow from the solar receiver to the turbine through the plurality of superheater panel arrangements (120a-d), to operate the turbine; a thermal energy storage arrangement having a thermal energy storage medium, the thermal energy storage arrangement configured to the steam circuit to receive a predetermined portion of the steam from the steam circuit to heat/charge the thermal energy storage medium, wherein the thermal energy storage arrangement is capable of receiving the steam to heat the thermal energy storage medium from at least, at an exit of the plurality of superheater panel arrangements (120a-d) prior to the turbine, and at desired locations in-between plurality of superheater panel arrangements (120a-d); and at an exit of the plurality of superheater panel arrangements (120a-d) prior to the turbine, and at desired locations in-between plurality of superheater panel arrangements (120a-d); and an auxiliary steam circuit configured to circulate an auxiliary steam flow, the auxiliary steam circuit configured to thermally communicate with the thermal energy storage arrangement to enable the auxiliary steam flow to be heated/discharged from the thermal energy storage medium and introduced into the plurality of superheater panel arrangements (120a-d); to attain predetermined conditions thereof, wherein the auxiliary steam flow is adapted to be introduced into the receiver superheater section at least, at the exit of the plurality of superheater panel arrangements (120a-d) prior to the turbine, and at suitable locations in-between the plurality of superheater panel arrangements (120a-d). at the exit of the plurality of superheater panel arrangements (120a-d) prior to the turbine, and at suitable locations in-between the plurality of superheater panel arrangements (120a-d).