Abstract: An air conditioner and a method for calculating an operating parameter of an indoor unit are provided. The air conditioner includes an outdoor unit, an indoor unit, and a controller. The controller is configured to: in a case where the air conditioner is in a cooling state, determine an operating parameter of the indoor unit in a second cooling state according to a heat exchange area, a heat exchange coefficient, and a heat exchange temperature difference of an indoor heat exchanger; and determine an operating parameter of the indoor unit in a first cooling state according to a superheat degree of an outlet of the indoor heat exchanger in the first cooling state, a superheat degree of the outlet of the indoor heat exchanger in the second cooling state, and the operating parameter of the indoor unit in the second cooling state.

Abstract: The present invention provides a method and a device for primary frequency regulation based on bang-bang control, the method comprises: obtaining in real-time a power grid frequency of a steam turbine generator set; performing a subtraction operation on a rated power grid frequency and said power grid frequency to generate a power grid frequency difference; performing a dead zone process on the power grid frequency difference according to a dead zone fixed value to generate a frequency difference; performing a frequency difference compensation operation on the frequency difference to generate a frequency difference compensation instruction; and combining an original primary frequency regulation output instruction with the frequency difference compensation instruction and outputting the result to a steam turbine speed regulation system when a selecting switch is 1.