Method for evaluating safety of thermal power generating unit in wind-solar-thermal coupling system

Abstract

The invention belongs to the related technical field of wind-light-fire coupling, and discloses a method for evaluating the safety of a thermal power generating unit in a wind-light-fire coupling system, and the method comprises the steps: constructing a wind power generating unit power model and a photoelectric generating unit power model; coupling the wind turbine generator power model, the photoelectric unit power model and the thermal power unit model to obtain a power tracking system model, and obtaining the thermal power unit power according to the power tracking system tracking model; according to the power of the thermal power generating unit, obtaining the temperature change relation of different radiuses of each shaft section of the steam turbine rotor in the thermal power generating unit along with time, and further obtaining the fatigue loss of the thermal power generating unit rotor; the harmonic waves are superposed and act on the shaft system of the thermal power generating unit, so that the impact of the harmonic waves on the shaft system of the thermal power generating unit can be obtained; and performing thermal power generating unit safety assessment based on fatigue loss and harmonic waves. The method can accurately evaluate the safety of the thermal power generating unit in the wind-solar-thermal coupling system, and has very important guiding significance for the application of the thermal power generating unit.

Description

technical field [0001] The invention belongs to the related technical field of wind-fire coupling, and more specifically relates to a method for evaluating the safety of a thermal power unit in a wind-fire coupling system. Background technique [0002] Electric energy plays a very important role in industrial and agricultural production and people's lives. With the rapid development of the economy, the demand for electric energy in all walks of life is gradually increasing. In order to ensure the stability of energy supply and reduce the damage to the environment caused by traditional thermal power , the development and utilization of renewable energy has become an important research direction in the field of energy. [0003] Among the renewable energy sources, wind energy and solar energy are clean energy with the most abundant resources and relatively mature power generation technology in my country. However, the problem of wind and solar abandonment in remote areas far fr...

AI Technical Summary

Problems solved by technology

However, in order to ensure the stability of the power grid when wind power, thermal power and photovoltaics are coupled, thermal power units need to be used as peak-shaving power sources to complete peak-shaving tasks and perform frequent variable load operations, which has an impact on the safety of thermal power units

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