Thermodynamic system and regulation and control method for rapid load responses of heat supply unit

Abstract

The invention discloses a thermodynamic system and a regulation and control method for rapid load responses of a heat supply unit. The technical problems that an existing thermodynamic system is poorin stability and high in cost are solved. The system is based on the heat supply unit, and the heat supply unit comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressurecylinder and a generator which are sequentially connected. A medium-low-pressure communication butterfly valve is arranged between the medium-pressure cylinder and the low-pressure cylinder and is used for regulating the flow of steam entering the low-pressure cylinder. A heat supply steam outlet is formed between the medium-pressure cylinder and the medium-low-pressure communication butterfly valve, and a steam extraction butterfly valve is arranged on a steam extraction pipeline and is used for adjusting and controlling the flow of steam entering a heat supply network heater. The system isused for rapidly responding to AGC load instructions and primary frequency modulation instructions through the heat supply unit. The steam extraction device and a heat supply network system are adjusted through the heat supply unit, the instantaneous heat supply steam flow of the heat supply unit is quickly changed, and the instantaneous thermoelectric ratio of the whole unit is adjusted, so thatthe quick responses to power generation loads of the unit are achieved.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a thermal system and control method for rapid load response of a heating unit. Background technique [0002] For large-scale thermal power generating units, the power generation goes through the load control center of the dispatching organization. Through the distribution of dispatching instructions, the thermal power plant responds to the power generation demand, that is, the AGC control system, adjusts and controls the actual power generation load of the thermal power generating unit, thereby To adapt to the load demand of power grid dispatching, the load response rate is generally required to be 1.5-2% / min to meet the power grid dispatching requirements. In addition, grid-connected thermal power units also need to have a frequency modulation function to ensure the stability of the grid frequency. [0003] At present, the load response rate of large thermal po...

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Problems solved by technology

[0007] A thermal system and control method for rapid load response of heating units proposed by the present invention can solve the technical problems of poor stability and high maintenance cost of existing thermal systems

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