Modeling and analyzing method for primary frequency modulation of pressurized water reactor nuclear power unit

Abstract

The invention relates to a modeling and analyzing method for primary frequency modulation of a pressurized water reactor nuclear power unit, which comprises the following steps of: analyzing mutual influence factors among parameters in a primary frequency modulation action process according to a primary frequency modulation action principle of the nuclear power unit, and giving a model structure among the parameters in combination with an operation mechanism, and meanwhile, according to a primary frequency modulation application range, selecting a typical working point, performing a characteristic test, using test data to carry out parameter identification on the model, building a primary frequency modulation dynamic model near the typical working point, performing simulation analysis through the established primary frequency modulation dynamic model, and evaluating the primary frequency modulation performance and the influence on the safety performance of the unit. Compared with the prior art, the modeling method provided by the invention has the advantages of being simple and convenient in modeling, capable of more accurately reproducing actual operation characteristics and the like.

Description

technical field [0001] The invention relates to a simulation technology of a pressurized water reactor nuclear power unit, in particular to a modeling and analysis method for primary frequency regulation of a pressurized water reactor nuclear power unit. Background technique [0002] In recent years, the scale of the power grid has continued to expand, coupled with the continuous integration of new energy sources such as wind power and solar power, the structure of the power grid has undergone great changes. The peak-to-valley difference of the power grid load is gradually increasing, and the frequency fluctuation is becoming more and more frequent, which puts forward higher requirements for the primary frequency regulation function of the grid-connected unit. In order to ensure the safety and stability of the power grid, many thermal power units have optimized the primary frequency modulation performance, especially the large frequency difference performance. Although my c...

AI Technical Summary

Problems solved by technology

On the one hand, the mechanism modeling method requires an in-depth understanding of the operating mechanism of the modeling object. The modeling is complex and the model solution is difficult. Especially the nuclear reactor mechanism model requires a lot of formula derivation and theoretical calculations, which is not convenient for actual engineering analysis and application; The mechanism model of the design parameters is simulated. Although the trend is consistent with the actual situation, the intrinsic characteristics of the system cannot be fully obtained without the actual operating data, and there is still a certain deviation between the simulation results and the actual operating results.

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