Primary frequency regulation device of thermal power generating unit

Abstract

The invention provides a primary frequency regulation device of a thermal power generating unit. The device is characterized by comprising a generator set (1), a steam turbine (2), a coal-fired boiler (3), a primary frequency regulation control device (5) and a decentralized control device (6). One end of the generator set (1) is connected with the steam turbine (2), the steam turbine (2) is connected with the coal-fired boiler (3), the other end of the generator set (1) is connected with the primary frequency regulation control device (5) through a voltage mutual inductor (4), the primary frequency regulation control device (5) is connected with one end of the decentralized control device (6), and the other end of the decentralized control device (6) is connected with the steam turbine (2) and the coal-fired boiler (3) respectively. The device is simple in connection and convenient to use, and high-speed high-precision acquisition of power grid frequency signals can be achieved.

Description

technical field [0001] The invention relates to a primary frequency regulation device for a thermal power unit. Background technique [0002] With new energy connected to the grid, load growth and the scale of the grid continue to increase, under the new situation of the interconnection of the UHV grid and the regional grid, the connection between the grids at all levels is becoming increasingly close, and the requirements for coordination and cooperation between the grid and the unit are also increasing. The higher the value, the primary frequency regulation in the network plant coordination function becomes one of the effective means to stabilize the power grid. The primary frequency regulation function of the generator set is an inherent function of the turbogenerator set. It is mainly through adjusting the steam inlet control door of the DEH system and using the heat storage of the boiler. When the power grid is abnormal, it can respond quickly to the grid. Make up the ...

AI Technical Summary

Problems solved by technology

The FM signal uploaded and dispatched is the 57.7V PT signal at the generator outlet. Due to the deviation of signal conversion and transmission, the frequency modulation action is frequent, and the number of actions actually recorded every day is too high. Invalid disturbance seriously affects the pass rate of a frequency modulation action.

At the same time, frequent actions of frequency regulation lead to fluctuations in steam turbine regulation, which brings hidden dangers to the safe operation of the unit

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