Abstract: A combined cycle power generation plant can include at least one gas turbine and at least one steam turbine. A method for providing Asymmetric Joint Control for Primary Frequency Regulation (PFR) in the combined cycle power generation plant can include the use of the spinning energy existing in the high pressure steam to rapidly supply additional power to the steam turbine for PFR service within the time frame established as a requirement to participate in the PFR service. The PFR control method can be carried out by controlling flow of high pressure steam to a medium pressure steam circuit through a bypass.

Abstract: A method for providing Asymmetric Joint Control for Primary Frequency Regulation (PFR) in combined cycle power generation plants, said plant comprising at least one gas turbine and at least one steam turbine is provided. The method may comprise the use of the spinning energy existing in the high pressure steam to rapidly supply additional power to the steam turbine for PFR service when required by the grid, within the time frame established as a requirement to participate in the PFR service,. In some embodiments, PFR control can be carried out jointly in the whole combined cycle plant and the distribution of spinning reserve energy can be asymmetric.

Abstract: A method to provide Primary Frequency Regulation to a steam turbine in a combined cycle plant that comprises storing energy in the form of internal energy of the steam contained within the piping and domes of the heat recovery boilers, and then using said energy when the power grid requires a sudden increase in output power. With the present method, the losses in power generation of the steam turbine, when said turbine is operating in the Primary Frequency Regulation mode, are reduced to a minimum. When the gas turbines in a combined cycle plant operate in PFR mode, the steam turbine reduces its output power because the gas turbines must operate below their rated power. The present method converts said decrease in output power of the steam turbine in a Spinning Reserve useful for PFR in said turbine. That is to say that the present method converts said Spinning Reserve in a rapid reserve, available after just a few seconds; if necessary, response times of less than 10 seconds can be attained.

Abstract: A method to provide Primary Frequency Regulation to a steam turbine in a combined cycle plant that comprises storing energy in the form of internal energy of the steam contained within the piping and domes of the heat recovery boilers, and then using said energy when the power grid requires a sudden increase in output power. With the present method, the losses in power generation of the steam turbine, when said turbine is operating in the Primary Frequency Regulation mode, are reduced to a minimum. When the gas turbines in a combined cycle plant operate in PFR mode, the steam turbine reduces its output power because the gas turbines must operate below their rated power. The present method converts said decrease in output power of the steam turbine in a Spinning Reserve useful for PFR in said turbine. That is to say that the present method converts said Spinning Reserve in a rapid reserve, available after just a few seconds; if necessary, response times of less than 10 seconds can be attained.