Graded control and running method of No.0 high-pressure heater of power plant set

Abstract

The invention discloses a graded control and running method of a No.0 high-pressure heater of a power plant set. The method comprises the following steps of making a control target of the No.0 high-pressure heater clear and definite; secondly, carrying out modular division on multiple working conditions of running of the No.0 high-pressure heater; and thirdly, dividing a control process into threestages of control. The method can be suitable for full-automatic operation putting of the No.0 high-pressure heater under the multiple working conditions of the set, meanwhile, the multiple working conditions in the set can be subjected to modular distinguishing, the aims of graded response and precise control are achieved, the adjusted amount runs in an optimum interval, meanwhile, for an abnormal working condition, in-advance early warning and accurate alarm giving can be achieved, rapid response is achieved, and the whole economy and safety of the set can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of large-scale thermal power generator sets, in particular to a hierarchical control and operation method of No. 0 high-power generator set of a power station under multi-working conditions. Background technique [0002] As the conventional configuration of large ultra-supercritical thermal power units at present, the No. 0 high-power unit has obvious effects in realizing high efficiency and wide load and responding to rapid load changes of units. The addition of No. 0 high-speed heater can effectively increase the feedwater temperature of the thermal power unit at low load, making it close to the optimal feedwater temperature, thereby increasing the flue gas temperature at the boiler outlet, ensuring the denitrification equipment to be put into operation as soon as possible, and improving the operating economy of the unit under low load as a whole . At the same time, it can also assist the unit to quickly ...

AI Technical Summary

Problems solved by technology

Part of the control is based on the simple control of No. 0 high and the pressure after the steam control valve is added, and the other part is based on the principle of controlling the No. 0 high and the outlet water temperature. During the control process, there are often trade-offs. Without comprehensive consideration, the economy and There are contradictions in security, and it is impossible to achieve effective balance

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