Generator whole process simulation model and modeling method thereof

Abstract

The invention discloses a generator whole process simulation model, comprising a difference adjustment coefficient constraint link, a comprehensive amplitude limiting link for expressing a comprehensive amplitude limiting effect, a climbing link for describing automatic gain control action effect, a total inertial link for describing time lag effect of a whole steam turbine-generator set, and a thermodynamic constraint link for describing energy storage effect of a thermodynamic system. The invention also provides a modeling method for the generator whole process simulation model. The method comprises the steps of carrying out model parameter fitting through adoption of practical power grid data; and inputting the same power grid initial frequency, power grid practical frequency and initial active power of a generator based on a simulation platform, comparing a waveform simulated and output by the generator whole process simulation model which takes comprehensive amplitude limiting and AGC (automatic gain control) into consideration with a practical wave recording curve of generator active output, and continuously adjusting the model parameters until the simulated and output waveform is consistent with the actually measured waveform. According to the model and the method, the fineness is approximate and the frequency modulation capability of the generator set can be improved.

Description

technical field [0001] The invention relates to a simulation model of the whole process of the generator, and also relates to a modeling method of the simulation model of the whole process of the generator, which belongs to the technical field of generators. Background technique [0002] The rapid development of my country's power grid has brought new problems and challenges to its operation control, among which the frequency control and response problems of large power grids are particularly prominent. For example, as the proportion of large-scale units in the region is getting higher and higher, while the proportion of small and medium-sized units is getting lower and lower, this will weaken the primary frequency regulation capability of the power supply. In addition, factors such as nuclear power plants, wind farms, and DC power sources are also important reasons for the weakening of frequency modulation capabilities; It brings serious impact and power loss, which in tur...

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Problems solved by technology

[0003] There are two extreme processing methods for the existing generator frequency modulation system model. One is that the model is oversimplified, and some important links are not considered, so that the model cannot be well adapted to the actual engineering project; the other is The model has been fine-tuned, but most of the factors considered are dead zone, differential coefficient and frequency modulation limit, and other important links are not taken into account, and the parameter settings are not accurate enough

In addition, the existing models are only suitable for short-term power system transient simulation analysis, not suitable for the simulation of the whole process of power system

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