Steam turbine generating system with indirect regulation on regenerative side and primary frequency regulating method

Abstract

The invention discloses a steam turbine generating system with indirect regulation on regenerative side and a primary frequency regulating method. The steam turbine generating system with indirect regulation on regenerative side comprises a steam turbine, a condenser, a low-pressure heating system, a high-pressure heating system and a power generator driven by the steam turbine. The steam turbine, the condenser, the low-pressure heating system and the high-pressure heating system are connected in sequence through a pipeline. Steam exhaust pipes are respectively connected between the steam turbine and the high-pressure heating system and between the steam turbine and the low-pressure heating system; a bypass pipeline is in parallel connection with the high-pressure heating system; an automatic flow regulator is mounted on the bypass pipeline, and is electrically connected with the power generator. By the primary frequency regulating method, steam throttle loss and heat consumption of the steam turbine generating system with indirect regulation on regenerative side during primary frequency regulation can be reduced, and accordingly reduction of economic loss is facilitated.

Description

technical field [0001] The invention relates to a steam turbine power generation system and a primary frequency regulation method thereof. Background technique [0002] The load change at the user end of the power grid is random. When the user load increases and the power generation load is not adjusted, the grid frequency will decrease; conversely, when the user load decreases, the grid frequency will increase. The variation of the grid frequency exceeds the allowable value, which will not only affect the equipment at the user end, but also damage the steam turbine and generator in serious cases. Therefore, the steam turbine should be equipped with a frequency regulation system. When the grid frequency deviates from the rated load, the output of the steam turbine can be automatically and quickly adjusted. , to match the power generation load with the user load, and reduce the range of grid frequency changes. This method of automatically adjusting the power of the steam tur...

AI Technical Summary

Problems solved by technology

Although the main valve can be fully opened, most of the steam is not throttled, but part of the steam flow through the supplementary steam valve is still throttled, and after being directly injected into the 5th stage, the working ability of the steam is reduced, and there is still a certain degree of economy. loss

The actual operation of multiple power plants shows that after using the steam supplement valve, not only the heat consumption of the unit increases, but also it is easy to cause vibration of the shaft system of the unit

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