Simulation recognition method for volume time constant of large steam turbine

Abstract

The invention belongs to the field of grid stability simulation modeling analysis and relates to steam turbine speed regulating system modeling testing technologies, in particular to a simulation recognition method for a volume time constant of a large steam turbine. The simulation recognition method comprises the following steps that a simulation input model, a time response transmission simulation model and model parameter recognition are established; for the response process that a steam turbine high-pressure regulating valve starts or stops adjustment of power of a generator, through simulation recognition on the volume time constant of the steam turbine, the process that a generator set of the steam turbine participates in grid frequency modulation control can be accurately mastered, and therefore stable operation of the generator set and a grid is maintained. According to the simulation recognition method, determination and recognition on the volume time constant of the steam turbine can be completed comprehensively and quickly, and the requirements of the grid for stable calculation and analysis are satisfied.

Description

technical field [0001] The invention belongs to the field of power grid stability simulation modeling analysis, relates to a modeling test technology of a speed regulating system of a steam turbine, in particular to a simulation identification method of a volume time constant of a large steam turbine. Background technique [0002] In order to maintain the stability of the power grid, the steam turbines for grid power generation need to have frequency regulation capabilities. When the grid frequency changes, the generator set immediately reversely adjusts the power of the unit through the steam turbine speed control system to achieve the purpose of stabilizing the grid frequency. A large steam turbine refers to a steam turbine generator set with a reheat cycle of more than 200MW. A large steam turbine consists of a high-pressure and medium-pressure combined cylinder (or a high-pressure cylinder and a medium-pressure cylinder), and one or two low-pressure cylinders. ,Such as ...

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Problems solved by technology

[0003] When a large steam turbine participates in the primary frequency regulation process of the power grid, due to the large capacity of the unit, the high level of steam parameters, and the existence of the volume of the steam turbine, the rhythm of the adjustment of the power of the generator set by each cylinder of the steam turbine is not consistent, which makes the generator set participate in the primary frequency regulation process of the power grid. Insufficient adjustment amount and unstable adjustment process

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